f7eaf9d702
In the single-page case we were issuing misaligned i/o to
the memory subsystem, which does not handle it properly.
Split such accesses via do_{ld,st}_mmio_*.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1800
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
3251 lines
102 KiB
C
3251 lines
102 KiB
C
/*
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* Common CPU TLB handling
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qemu/main-loop.h"
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#include "hw/core/tcg-cpu-ops.h"
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#include "exec/exec-all.h"
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#include "exec/memory.h"
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#include "exec/cpu_ldst.h"
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#include "exec/cputlb.h"
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#include "exec/memory-internal.h"
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#include "exec/ram_addr.h"
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#include "tcg/tcg.h"
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#include "qemu/error-report.h"
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#include "exec/log.h"
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#include "exec/helper-proto-common.h"
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#include "qemu/atomic.h"
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#include "qemu/atomic128.h"
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#include "exec/translate-all.h"
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#include "trace.h"
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#include "tb-hash.h"
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#include "internal.h"
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#ifdef CONFIG_PLUGIN
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#include "qemu/plugin-memory.h"
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#endif
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#include "tcg/tcg-ldst.h"
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#include "tcg/oversized-guest.h"
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/* DEBUG defines, enable DEBUG_TLB_LOG to log to the CPU_LOG_MMU target */
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/* #define DEBUG_TLB */
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/* #define DEBUG_TLB_LOG */
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#ifdef DEBUG_TLB
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# define DEBUG_TLB_GATE 1
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# ifdef DEBUG_TLB_LOG
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# define DEBUG_TLB_LOG_GATE 1
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# else
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# define DEBUG_TLB_LOG_GATE 0
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# endif
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#else
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# define DEBUG_TLB_GATE 0
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# define DEBUG_TLB_LOG_GATE 0
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#endif
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#define tlb_debug(fmt, ...) do { \
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if (DEBUG_TLB_LOG_GATE) { \
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qemu_log_mask(CPU_LOG_MMU, "%s: " fmt, __func__, \
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## __VA_ARGS__); \
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} else if (DEBUG_TLB_GATE) { \
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fprintf(stderr, "%s: " fmt, __func__, ## __VA_ARGS__); \
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} \
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} while (0)
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#define assert_cpu_is_self(cpu) do { \
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if (DEBUG_TLB_GATE) { \
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g_assert(!(cpu)->created || qemu_cpu_is_self(cpu)); \
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} \
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} while (0)
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/* run_on_cpu_data.target_ptr should always be big enough for a
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* target_ulong even on 32 bit builds */
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QEMU_BUILD_BUG_ON(sizeof(target_ulong) > sizeof(run_on_cpu_data));
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/* We currently can't handle more than 16 bits in the MMUIDX bitmask.
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*/
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QEMU_BUILD_BUG_ON(NB_MMU_MODES > 16);
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#define ALL_MMUIDX_BITS ((1 << NB_MMU_MODES) - 1)
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static inline size_t tlb_n_entries(CPUTLBDescFast *fast)
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{
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return (fast->mask >> CPU_TLB_ENTRY_BITS) + 1;
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}
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static inline size_t sizeof_tlb(CPUTLBDescFast *fast)
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{
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return fast->mask + (1 << CPU_TLB_ENTRY_BITS);
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}
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static void tlb_window_reset(CPUTLBDesc *desc, int64_t ns,
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size_t max_entries)
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{
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desc->window_begin_ns = ns;
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desc->window_max_entries = max_entries;
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}
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static void tb_jmp_cache_clear_page(CPUState *cpu, vaddr page_addr)
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{
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CPUJumpCache *jc = cpu->tb_jmp_cache;
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int i, i0;
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if (unlikely(!jc)) {
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return;
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}
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i0 = tb_jmp_cache_hash_page(page_addr);
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for (i = 0; i < TB_JMP_PAGE_SIZE; i++) {
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qatomic_set(&jc->array[i0 + i].tb, NULL);
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}
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}
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/**
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* tlb_mmu_resize_locked() - perform TLB resize bookkeeping; resize if necessary
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* @desc: The CPUTLBDesc portion of the TLB
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* @fast: The CPUTLBDescFast portion of the same TLB
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*
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* Called with tlb_lock_held.
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*
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* We have two main constraints when resizing a TLB: (1) we only resize it
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* on a TLB flush (otherwise we'd have to take a perf hit by either rehashing
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* the array or unnecessarily flushing it), which means we do not control how
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* frequently the resizing can occur; (2) we don't have access to the guest's
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* future scheduling decisions, and therefore have to decide the magnitude of
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* the resize based on past observations.
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*
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* In general, a memory-hungry process can benefit greatly from an appropriately
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* sized TLB, since a guest TLB miss is very expensive. This doesn't mean that
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* we just have to make the TLB as large as possible; while an oversized TLB
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* results in minimal TLB miss rates, it also takes longer to be flushed
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* (flushes can be _very_ frequent), and the reduced locality can also hurt
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* performance.
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*
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* To achieve near-optimal performance for all kinds of workloads, we:
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*
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* 1. Aggressively increase the size of the TLB when the use rate of the
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* TLB being flushed is high, since it is likely that in the near future this
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* memory-hungry process will execute again, and its memory hungriness will
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* probably be similar.
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*
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* 2. Slowly reduce the size of the TLB as the use rate declines over a
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* reasonably large time window. The rationale is that if in such a time window
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* we have not observed a high TLB use rate, it is likely that we won't observe
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* it in the near future. In that case, once a time window expires we downsize
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* the TLB to match the maximum use rate observed in the window.
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*
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* 3. Try to keep the maximum use rate in a time window in the 30-70% range,
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* since in that range performance is likely near-optimal. Recall that the TLB
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* is direct mapped, so we want the use rate to be low (or at least not too
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* high), since otherwise we are likely to have a significant amount of
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* conflict misses.
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*/
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static void tlb_mmu_resize_locked(CPUTLBDesc *desc, CPUTLBDescFast *fast,
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int64_t now)
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{
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size_t old_size = tlb_n_entries(fast);
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size_t rate;
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size_t new_size = old_size;
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int64_t window_len_ms = 100;
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int64_t window_len_ns = window_len_ms * 1000 * 1000;
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bool window_expired = now > desc->window_begin_ns + window_len_ns;
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if (desc->n_used_entries > desc->window_max_entries) {
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desc->window_max_entries = desc->n_used_entries;
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}
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rate = desc->window_max_entries * 100 / old_size;
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if (rate > 70) {
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new_size = MIN(old_size << 1, 1 << CPU_TLB_DYN_MAX_BITS);
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} else if (rate < 30 && window_expired) {
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size_t ceil = pow2ceil(desc->window_max_entries);
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size_t expected_rate = desc->window_max_entries * 100 / ceil;
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/*
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* Avoid undersizing when the max number of entries seen is just below
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* a pow2. For instance, if max_entries == 1025, the expected use rate
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* would be 1025/2048==50%. However, if max_entries == 1023, we'd get
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* 1023/1024==99.9% use rate, so we'd likely end up doubling the size
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* later. Thus, make sure that the expected use rate remains below 70%.
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* (and since we double the size, that means the lowest rate we'd
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* expect to get is 35%, which is still in the 30-70% range where
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* we consider that the size is appropriate.)
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*/
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if (expected_rate > 70) {
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ceil *= 2;
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}
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new_size = MAX(ceil, 1 << CPU_TLB_DYN_MIN_BITS);
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}
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if (new_size == old_size) {
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if (window_expired) {
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tlb_window_reset(desc, now, desc->n_used_entries);
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}
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return;
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}
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g_free(fast->table);
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g_free(desc->fulltlb);
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tlb_window_reset(desc, now, 0);
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/* desc->n_used_entries is cleared by the caller */
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fast->mask = (new_size - 1) << CPU_TLB_ENTRY_BITS;
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fast->table = g_try_new(CPUTLBEntry, new_size);
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desc->fulltlb = g_try_new(CPUTLBEntryFull, new_size);
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/*
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* If the allocations fail, try smaller sizes. We just freed some
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* memory, so going back to half of new_size has a good chance of working.
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* Increased memory pressure elsewhere in the system might cause the
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* allocations to fail though, so we progressively reduce the allocation
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* size, aborting if we cannot even allocate the smallest TLB we support.
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*/
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while (fast->table == NULL || desc->fulltlb == NULL) {
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if (new_size == (1 << CPU_TLB_DYN_MIN_BITS)) {
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error_report("%s: %s", __func__, strerror(errno));
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abort();
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}
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new_size = MAX(new_size >> 1, 1 << CPU_TLB_DYN_MIN_BITS);
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fast->mask = (new_size - 1) << CPU_TLB_ENTRY_BITS;
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g_free(fast->table);
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g_free(desc->fulltlb);
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fast->table = g_try_new(CPUTLBEntry, new_size);
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desc->fulltlb = g_try_new(CPUTLBEntryFull, new_size);
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}
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}
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static void tlb_mmu_flush_locked(CPUTLBDesc *desc, CPUTLBDescFast *fast)
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{
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desc->n_used_entries = 0;
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desc->large_page_addr = -1;
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desc->large_page_mask = -1;
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desc->vindex = 0;
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memset(fast->table, -1, sizeof_tlb(fast));
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memset(desc->vtable, -1, sizeof(desc->vtable));
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}
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static void tlb_flush_one_mmuidx_locked(CPUArchState *env, int mmu_idx,
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int64_t now)
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{
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CPUTLBDesc *desc = &env_tlb(env)->d[mmu_idx];
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CPUTLBDescFast *fast = &env_tlb(env)->f[mmu_idx];
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tlb_mmu_resize_locked(desc, fast, now);
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tlb_mmu_flush_locked(desc, fast);
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}
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static void tlb_mmu_init(CPUTLBDesc *desc, CPUTLBDescFast *fast, int64_t now)
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{
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size_t n_entries = 1 << CPU_TLB_DYN_DEFAULT_BITS;
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tlb_window_reset(desc, now, 0);
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desc->n_used_entries = 0;
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fast->mask = (n_entries - 1) << CPU_TLB_ENTRY_BITS;
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fast->table = g_new(CPUTLBEntry, n_entries);
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desc->fulltlb = g_new(CPUTLBEntryFull, n_entries);
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tlb_mmu_flush_locked(desc, fast);
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}
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static inline void tlb_n_used_entries_inc(CPUArchState *env, uintptr_t mmu_idx)
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{
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env_tlb(env)->d[mmu_idx].n_used_entries++;
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}
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static inline void tlb_n_used_entries_dec(CPUArchState *env, uintptr_t mmu_idx)
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{
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env_tlb(env)->d[mmu_idx].n_used_entries--;
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}
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void tlb_init(CPUState *cpu)
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{
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CPUArchState *env = cpu->env_ptr;
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int64_t now = get_clock_realtime();
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int i;
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qemu_spin_init(&env_tlb(env)->c.lock);
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/* All tlbs are initialized flushed. */
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env_tlb(env)->c.dirty = 0;
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for (i = 0; i < NB_MMU_MODES; i++) {
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tlb_mmu_init(&env_tlb(env)->d[i], &env_tlb(env)->f[i], now);
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}
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}
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void tlb_destroy(CPUState *cpu)
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{
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CPUArchState *env = cpu->env_ptr;
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int i;
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qemu_spin_destroy(&env_tlb(env)->c.lock);
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for (i = 0; i < NB_MMU_MODES; i++) {
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CPUTLBDesc *desc = &env_tlb(env)->d[i];
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CPUTLBDescFast *fast = &env_tlb(env)->f[i];
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g_free(fast->table);
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g_free(desc->fulltlb);
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}
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}
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/* flush_all_helper: run fn across all cpus
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*
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* If the wait flag is set then the src cpu's helper will be queued as
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* "safe" work and the loop exited creating a synchronisation point
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* where all queued work will be finished before execution starts
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* again.
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*/
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static void flush_all_helper(CPUState *src, run_on_cpu_func fn,
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run_on_cpu_data d)
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{
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CPUState *cpu;
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CPU_FOREACH(cpu) {
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if (cpu != src) {
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async_run_on_cpu(cpu, fn, d);
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}
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}
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}
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void tlb_flush_counts(size_t *pfull, size_t *ppart, size_t *pelide)
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{
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CPUState *cpu;
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size_t full = 0, part = 0, elide = 0;
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CPU_FOREACH(cpu) {
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CPUArchState *env = cpu->env_ptr;
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full += qatomic_read(&env_tlb(env)->c.full_flush_count);
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part += qatomic_read(&env_tlb(env)->c.part_flush_count);
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elide += qatomic_read(&env_tlb(env)->c.elide_flush_count);
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}
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*pfull = full;
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*ppart = part;
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*pelide = elide;
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}
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static void tlb_flush_by_mmuidx_async_work(CPUState *cpu, run_on_cpu_data data)
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{
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CPUArchState *env = cpu->env_ptr;
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uint16_t asked = data.host_int;
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uint16_t all_dirty, work, to_clean;
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int64_t now = get_clock_realtime();
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assert_cpu_is_self(cpu);
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tlb_debug("mmu_idx:0x%04" PRIx16 "\n", asked);
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qemu_spin_lock(&env_tlb(env)->c.lock);
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all_dirty = env_tlb(env)->c.dirty;
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to_clean = asked & all_dirty;
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all_dirty &= ~to_clean;
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env_tlb(env)->c.dirty = all_dirty;
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for (work = to_clean; work != 0; work &= work - 1) {
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int mmu_idx = ctz32(work);
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tlb_flush_one_mmuidx_locked(env, mmu_idx, now);
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}
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qemu_spin_unlock(&env_tlb(env)->c.lock);
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tcg_flush_jmp_cache(cpu);
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if (to_clean == ALL_MMUIDX_BITS) {
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qatomic_set(&env_tlb(env)->c.full_flush_count,
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env_tlb(env)->c.full_flush_count + 1);
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} else {
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qatomic_set(&env_tlb(env)->c.part_flush_count,
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env_tlb(env)->c.part_flush_count + ctpop16(to_clean));
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if (to_clean != asked) {
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qatomic_set(&env_tlb(env)->c.elide_flush_count,
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env_tlb(env)->c.elide_flush_count +
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ctpop16(asked & ~to_clean));
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}
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}
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}
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void tlb_flush_by_mmuidx(CPUState *cpu, uint16_t idxmap)
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{
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tlb_debug("mmu_idx: 0x%" PRIx16 "\n", idxmap);
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if (cpu->created && !qemu_cpu_is_self(cpu)) {
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async_run_on_cpu(cpu, tlb_flush_by_mmuidx_async_work,
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RUN_ON_CPU_HOST_INT(idxmap));
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} else {
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tlb_flush_by_mmuidx_async_work(cpu, RUN_ON_CPU_HOST_INT(idxmap));
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}
|
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}
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void tlb_flush(CPUState *cpu)
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{
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tlb_flush_by_mmuidx(cpu, ALL_MMUIDX_BITS);
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}
|
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|
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void tlb_flush_by_mmuidx_all_cpus(CPUState *src_cpu, uint16_t idxmap)
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{
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const run_on_cpu_func fn = tlb_flush_by_mmuidx_async_work;
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tlb_debug("mmu_idx: 0x%"PRIx16"\n", idxmap);
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flush_all_helper(src_cpu, fn, RUN_ON_CPU_HOST_INT(idxmap));
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fn(src_cpu, RUN_ON_CPU_HOST_INT(idxmap));
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}
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void tlb_flush_all_cpus(CPUState *src_cpu)
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{
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tlb_flush_by_mmuidx_all_cpus(src_cpu, ALL_MMUIDX_BITS);
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}
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void tlb_flush_by_mmuidx_all_cpus_synced(CPUState *src_cpu, uint16_t idxmap)
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{
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const run_on_cpu_func fn = tlb_flush_by_mmuidx_async_work;
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tlb_debug("mmu_idx: 0x%"PRIx16"\n", idxmap);
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flush_all_helper(src_cpu, fn, RUN_ON_CPU_HOST_INT(idxmap));
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async_safe_run_on_cpu(src_cpu, fn, RUN_ON_CPU_HOST_INT(idxmap));
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}
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void tlb_flush_all_cpus_synced(CPUState *src_cpu)
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{
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tlb_flush_by_mmuidx_all_cpus_synced(src_cpu, ALL_MMUIDX_BITS);
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}
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static bool tlb_hit_page_mask_anyprot(CPUTLBEntry *tlb_entry,
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vaddr page, vaddr mask)
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{
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page &= mask;
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mask &= TARGET_PAGE_MASK | TLB_INVALID_MASK;
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return (page == (tlb_entry->addr_read & mask) ||
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page == (tlb_addr_write(tlb_entry) & mask) ||
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page == (tlb_entry->addr_code & mask));
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}
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static inline bool tlb_hit_page_anyprot(CPUTLBEntry *tlb_entry, vaddr page)
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{
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return tlb_hit_page_mask_anyprot(tlb_entry, page, -1);
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}
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/**
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* tlb_entry_is_empty - return true if the entry is not in use
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* @te: pointer to CPUTLBEntry
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*/
|
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static inline bool tlb_entry_is_empty(const CPUTLBEntry *te)
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|
{
|
|
return te->addr_read == -1 && te->addr_write == -1 && te->addr_code == -1;
|
|
}
|
|
|
|
/* Called with tlb_c.lock held */
|
|
static bool tlb_flush_entry_mask_locked(CPUTLBEntry *tlb_entry,
|
|
vaddr page,
|
|
vaddr mask)
|
|
{
|
|
if (tlb_hit_page_mask_anyprot(tlb_entry, page, mask)) {
|
|
memset(tlb_entry, -1, sizeof(*tlb_entry));
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static inline bool tlb_flush_entry_locked(CPUTLBEntry *tlb_entry, vaddr page)
|
|
{
|
|
return tlb_flush_entry_mask_locked(tlb_entry, page, -1);
|
|
}
|
|
|
|
/* Called with tlb_c.lock held */
|
|
static void tlb_flush_vtlb_page_mask_locked(CPUArchState *env, int mmu_idx,
|
|
vaddr page,
|
|
vaddr mask)
|
|
{
|
|
CPUTLBDesc *d = &env_tlb(env)->d[mmu_idx];
|
|
int k;
|
|
|
|
assert_cpu_is_self(env_cpu(env));
|
|
for (k = 0; k < CPU_VTLB_SIZE; k++) {
|
|
if (tlb_flush_entry_mask_locked(&d->vtable[k], page, mask)) {
|
|
tlb_n_used_entries_dec(env, mmu_idx);
|
|
}
|
|
}
|
|
}
|
|
|
|
static inline void tlb_flush_vtlb_page_locked(CPUArchState *env, int mmu_idx,
|
|
vaddr page)
|
|
{
|
|
tlb_flush_vtlb_page_mask_locked(env, mmu_idx, page, -1);
|
|
}
|
|
|
|
static void tlb_flush_page_locked(CPUArchState *env, int midx, vaddr page)
|
|
{
|
|
vaddr lp_addr = env_tlb(env)->d[midx].large_page_addr;
|
|
vaddr lp_mask = env_tlb(env)->d[midx].large_page_mask;
|
|
|
|
/* Check if we need to flush due to large pages. */
|
|
if ((page & lp_mask) == lp_addr) {
|
|
tlb_debug("forcing full flush midx %d (%016"
|
|
VADDR_PRIx "/%016" VADDR_PRIx ")\n",
|
|
midx, lp_addr, lp_mask);
|
|
tlb_flush_one_mmuidx_locked(env, midx, get_clock_realtime());
|
|
} else {
|
|
if (tlb_flush_entry_locked(tlb_entry(env, midx, page), page)) {
|
|
tlb_n_used_entries_dec(env, midx);
|
|
}
|
|
tlb_flush_vtlb_page_locked(env, midx, page);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* tlb_flush_page_by_mmuidx_async_0:
|
|
* @cpu: cpu on which to flush
|
|
* @addr: page of virtual address to flush
|
|
* @idxmap: set of mmu_idx to flush
|
|
*
|
|
* Helper for tlb_flush_page_by_mmuidx and friends, flush one page
|
|
* at @addr from the tlbs indicated by @idxmap from @cpu.
|
|
*/
|
|
static void tlb_flush_page_by_mmuidx_async_0(CPUState *cpu,
|
|
vaddr addr,
|
|
uint16_t idxmap)
|
|
{
|
|
CPUArchState *env = cpu->env_ptr;
|
|
int mmu_idx;
|
|
|
|
assert_cpu_is_self(cpu);
|
|
|
|
tlb_debug("page addr: %016" VADDR_PRIx " mmu_map:0x%x\n", addr, idxmap);
|
|
|
|
qemu_spin_lock(&env_tlb(env)->c.lock);
|
|
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
|
|
if ((idxmap >> mmu_idx) & 1) {
|
|
tlb_flush_page_locked(env, mmu_idx, addr);
|
|
}
|
|
}
|
|
qemu_spin_unlock(&env_tlb(env)->c.lock);
|
|
|
|
/*
|
|
* Discard jump cache entries for any tb which might potentially
|
|
* overlap the flushed page, which includes the previous.
|
|
*/
|
|
tb_jmp_cache_clear_page(cpu, addr - TARGET_PAGE_SIZE);
|
|
tb_jmp_cache_clear_page(cpu, addr);
|
|
}
|
|
|
|
/**
|
|
* tlb_flush_page_by_mmuidx_async_1:
|
|
* @cpu: cpu on which to flush
|
|
* @data: encoded addr + idxmap
|
|
*
|
|
* Helper for tlb_flush_page_by_mmuidx and friends, called through
|
|
* async_run_on_cpu. The idxmap parameter is encoded in the page
|
|
* offset of the target_ptr field. This limits the set of mmu_idx
|
|
* that can be passed via this method.
|
|
*/
|
|
static void tlb_flush_page_by_mmuidx_async_1(CPUState *cpu,
|
|
run_on_cpu_data data)
|
|
{
|
|
vaddr addr_and_idxmap = data.target_ptr;
|
|
vaddr addr = addr_and_idxmap & TARGET_PAGE_MASK;
|
|
uint16_t idxmap = addr_and_idxmap & ~TARGET_PAGE_MASK;
|
|
|
|
tlb_flush_page_by_mmuidx_async_0(cpu, addr, idxmap);
|
|
}
|
|
|
|
typedef struct {
|
|
vaddr addr;
|
|
uint16_t idxmap;
|
|
} TLBFlushPageByMMUIdxData;
|
|
|
|
/**
|
|
* tlb_flush_page_by_mmuidx_async_2:
|
|
* @cpu: cpu on which to flush
|
|
* @data: allocated addr + idxmap
|
|
*
|
|
* Helper for tlb_flush_page_by_mmuidx and friends, called through
|
|
* async_run_on_cpu. The addr+idxmap parameters are stored in a
|
|
* TLBFlushPageByMMUIdxData structure that has been allocated
|
|
* specifically for this helper. Free the structure when done.
|
|
*/
|
|
static void tlb_flush_page_by_mmuidx_async_2(CPUState *cpu,
|
|
run_on_cpu_data data)
|
|
{
|
|
TLBFlushPageByMMUIdxData *d = data.host_ptr;
|
|
|
|
tlb_flush_page_by_mmuidx_async_0(cpu, d->addr, d->idxmap);
|
|
g_free(d);
|
|
}
|
|
|
|
void tlb_flush_page_by_mmuidx(CPUState *cpu, vaddr addr, uint16_t idxmap)
|
|
{
|
|
tlb_debug("addr: %016" VADDR_PRIx " mmu_idx:%" PRIx16 "\n", addr, idxmap);
|
|
|
|
/* This should already be page aligned */
|
|
addr &= TARGET_PAGE_MASK;
|
|
|
|
if (qemu_cpu_is_self(cpu)) {
|
|
tlb_flush_page_by_mmuidx_async_0(cpu, addr, idxmap);
|
|
} else if (idxmap < TARGET_PAGE_SIZE) {
|
|
/*
|
|
* Most targets have only a few mmu_idx. In the case where
|
|
* we can stuff idxmap into the low TARGET_PAGE_BITS, avoid
|
|
* allocating memory for this operation.
|
|
*/
|
|
async_run_on_cpu(cpu, tlb_flush_page_by_mmuidx_async_1,
|
|
RUN_ON_CPU_TARGET_PTR(addr | idxmap));
|
|
} else {
|
|
TLBFlushPageByMMUIdxData *d = g_new(TLBFlushPageByMMUIdxData, 1);
|
|
|
|
/* Otherwise allocate a structure, freed by the worker. */
|
|
d->addr = addr;
|
|
d->idxmap = idxmap;
|
|
async_run_on_cpu(cpu, tlb_flush_page_by_mmuidx_async_2,
|
|
RUN_ON_CPU_HOST_PTR(d));
|
|
}
|
|
}
|
|
|
|
void tlb_flush_page(CPUState *cpu, vaddr addr)
|
|
{
|
|
tlb_flush_page_by_mmuidx(cpu, addr, ALL_MMUIDX_BITS);
|
|
}
|
|
|
|
void tlb_flush_page_by_mmuidx_all_cpus(CPUState *src_cpu, vaddr addr,
|
|
uint16_t idxmap)
|
|
{
|
|
tlb_debug("addr: %016" VADDR_PRIx " mmu_idx:%"PRIx16"\n", addr, idxmap);
|
|
|
|
/* This should already be page aligned */
|
|
addr &= TARGET_PAGE_MASK;
|
|
|
|
/*
|
|
* Allocate memory to hold addr+idxmap only when needed.
|
|
* See tlb_flush_page_by_mmuidx for details.
|
|
*/
|
|
if (idxmap < TARGET_PAGE_SIZE) {
|
|
flush_all_helper(src_cpu, tlb_flush_page_by_mmuidx_async_1,
|
|
RUN_ON_CPU_TARGET_PTR(addr | idxmap));
|
|
} else {
|
|
CPUState *dst_cpu;
|
|
|
|
/* Allocate a separate data block for each destination cpu. */
|
|
CPU_FOREACH(dst_cpu) {
|
|
if (dst_cpu != src_cpu) {
|
|
TLBFlushPageByMMUIdxData *d
|
|
= g_new(TLBFlushPageByMMUIdxData, 1);
|
|
|
|
d->addr = addr;
|
|
d->idxmap = idxmap;
|
|
async_run_on_cpu(dst_cpu, tlb_flush_page_by_mmuidx_async_2,
|
|
RUN_ON_CPU_HOST_PTR(d));
|
|
}
|
|
}
|
|
}
|
|
|
|
tlb_flush_page_by_mmuidx_async_0(src_cpu, addr, idxmap);
|
|
}
|
|
|
|
void tlb_flush_page_all_cpus(CPUState *src, vaddr addr)
|
|
{
|
|
tlb_flush_page_by_mmuidx_all_cpus(src, addr, ALL_MMUIDX_BITS);
|
|
}
|
|
|
|
void tlb_flush_page_by_mmuidx_all_cpus_synced(CPUState *src_cpu,
|
|
vaddr addr,
|
|
uint16_t idxmap)
|
|
{
|
|
tlb_debug("addr: %016" VADDR_PRIx " mmu_idx:%"PRIx16"\n", addr, idxmap);
|
|
|
|
/* This should already be page aligned */
|
|
addr &= TARGET_PAGE_MASK;
|
|
|
|
/*
|
|
* Allocate memory to hold addr+idxmap only when needed.
|
|
* See tlb_flush_page_by_mmuidx for details.
|
|
*/
|
|
if (idxmap < TARGET_PAGE_SIZE) {
|
|
flush_all_helper(src_cpu, tlb_flush_page_by_mmuidx_async_1,
|
|
RUN_ON_CPU_TARGET_PTR(addr | idxmap));
|
|
async_safe_run_on_cpu(src_cpu, tlb_flush_page_by_mmuidx_async_1,
|
|
RUN_ON_CPU_TARGET_PTR(addr | idxmap));
|
|
} else {
|
|
CPUState *dst_cpu;
|
|
TLBFlushPageByMMUIdxData *d;
|
|
|
|
/* Allocate a separate data block for each destination cpu. */
|
|
CPU_FOREACH(dst_cpu) {
|
|
if (dst_cpu != src_cpu) {
|
|
d = g_new(TLBFlushPageByMMUIdxData, 1);
|
|
d->addr = addr;
|
|
d->idxmap = idxmap;
|
|
async_run_on_cpu(dst_cpu, tlb_flush_page_by_mmuidx_async_2,
|
|
RUN_ON_CPU_HOST_PTR(d));
|
|
}
|
|
}
|
|
|
|
d = g_new(TLBFlushPageByMMUIdxData, 1);
|
|
d->addr = addr;
|
|
d->idxmap = idxmap;
|
|
async_safe_run_on_cpu(src_cpu, tlb_flush_page_by_mmuidx_async_2,
|
|
RUN_ON_CPU_HOST_PTR(d));
|
|
}
|
|
}
|
|
|
|
void tlb_flush_page_all_cpus_synced(CPUState *src, vaddr addr)
|
|
{
|
|
tlb_flush_page_by_mmuidx_all_cpus_synced(src, addr, ALL_MMUIDX_BITS);
|
|
}
|
|
|
|
static void tlb_flush_range_locked(CPUArchState *env, int midx,
|
|
vaddr addr, vaddr len,
|
|
unsigned bits)
|
|
{
|
|
CPUTLBDesc *d = &env_tlb(env)->d[midx];
|
|
CPUTLBDescFast *f = &env_tlb(env)->f[midx];
|
|
vaddr mask = MAKE_64BIT_MASK(0, bits);
|
|
|
|
/*
|
|
* If @bits is smaller than the tlb size, there may be multiple entries
|
|
* within the TLB; otherwise all addresses that match under @mask hit
|
|
* the same TLB entry.
|
|
* TODO: Perhaps allow bits to be a few bits less than the size.
|
|
* For now, just flush the entire TLB.
|
|
*
|
|
* If @len is larger than the tlb size, then it will take longer to
|
|
* test all of the entries in the TLB than it will to flush it all.
|
|
*/
|
|
if (mask < f->mask || len > f->mask) {
|
|
tlb_debug("forcing full flush midx %d ("
|
|
"%016" VADDR_PRIx "/%016" VADDR_PRIx "+%016" VADDR_PRIx ")\n",
|
|
midx, addr, mask, len);
|
|
tlb_flush_one_mmuidx_locked(env, midx, get_clock_realtime());
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Check if we need to flush due to large pages.
|
|
* Because large_page_mask contains all 1's from the msb,
|
|
* we only need to test the end of the range.
|
|
*/
|
|
if (((addr + len - 1) & d->large_page_mask) == d->large_page_addr) {
|
|
tlb_debug("forcing full flush midx %d ("
|
|
"%016" VADDR_PRIx "/%016" VADDR_PRIx ")\n",
|
|
midx, d->large_page_addr, d->large_page_mask);
|
|
tlb_flush_one_mmuidx_locked(env, midx, get_clock_realtime());
|
|
return;
|
|
}
|
|
|
|
for (vaddr i = 0; i < len; i += TARGET_PAGE_SIZE) {
|
|
vaddr page = addr + i;
|
|
CPUTLBEntry *entry = tlb_entry(env, midx, page);
|
|
|
|
if (tlb_flush_entry_mask_locked(entry, page, mask)) {
|
|
tlb_n_used_entries_dec(env, midx);
|
|
}
|
|
tlb_flush_vtlb_page_mask_locked(env, midx, page, mask);
|
|
}
|
|
}
|
|
|
|
typedef struct {
|
|
vaddr addr;
|
|
vaddr len;
|
|
uint16_t idxmap;
|
|
uint16_t bits;
|
|
} TLBFlushRangeData;
|
|
|
|
static void tlb_flush_range_by_mmuidx_async_0(CPUState *cpu,
|
|
TLBFlushRangeData d)
|
|
{
|
|
CPUArchState *env = cpu->env_ptr;
|
|
int mmu_idx;
|
|
|
|
assert_cpu_is_self(cpu);
|
|
|
|
tlb_debug("range: %016" VADDR_PRIx "/%u+%016" VADDR_PRIx " mmu_map:0x%x\n",
|
|
d.addr, d.bits, d.len, d.idxmap);
|
|
|
|
qemu_spin_lock(&env_tlb(env)->c.lock);
|
|
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
|
|
if ((d.idxmap >> mmu_idx) & 1) {
|
|
tlb_flush_range_locked(env, mmu_idx, d.addr, d.len, d.bits);
|
|
}
|
|
}
|
|
qemu_spin_unlock(&env_tlb(env)->c.lock);
|
|
|
|
/*
|
|
* If the length is larger than the jump cache size, then it will take
|
|
* longer to clear each entry individually than it will to clear it all.
|
|
*/
|
|
if (d.len >= (TARGET_PAGE_SIZE * TB_JMP_CACHE_SIZE)) {
|
|
tcg_flush_jmp_cache(cpu);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Discard jump cache entries for any tb which might potentially
|
|
* overlap the flushed pages, which includes the previous.
|
|
*/
|
|
d.addr -= TARGET_PAGE_SIZE;
|
|
for (vaddr i = 0, n = d.len / TARGET_PAGE_SIZE + 1; i < n; i++) {
|
|
tb_jmp_cache_clear_page(cpu, d.addr);
|
|
d.addr += TARGET_PAGE_SIZE;
|
|
}
|
|
}
|
|
|
|
static void tlb_flush_range_by_mmuidx_async_1(CPUState *cpu,
|
|
run_on_cpu_data data)
|
|
{
|
|
TLBFlushRangeData *d = data.host_ptr;
|
|
tlb_flush_range_by_mmuidx_async_0(cpu, *d);
|
|
g_free(d);
|
|
}
|
|
|
|
void tlb_flush_range_by_mmuidx(CPUState *cpu, vaddr addr,
|
|
vaddr len, uint16_t idxmap,
|
|
unsigned bits)
|
|
{
|
|
TLBFlushRangeData d;
|
|
|
|
/*
|
|
* If all bits are significant, and len is small,
|
|
* this devolves to tlb_flush_page.
|
|
*/
|
|
if (bits >= TARGET_LONG_BITS && len <= TARGET_PAGE_SIZE) {
|
|
tlb_flush_page_by_mmuidx(cpu, addr, idxmap);
|
|
return;
|
|
}
|
|
/* If no page bits are significant, this devolves to tlb_flush. */
|
|
if (bits < TARGET_PAGE_BITS) {
|
|
tlb_flush_by_mmuidx(cpu, idxmap);
|
|
return;
|
|
}
|
|
|
|
/* This should already be page aligned */
|
|
d.addr = addr & TARGET_PAGE_MASK;
|
|
d.len = len;
|
|
d.idxmap = idxmap;
|
|
d.bits = bits;
|
|
|
|
if (qemu_cpu_is_self(cpu)) {
|
|
tlb_flush_range_by_mmuidx_async_0(cpu, d);
|
|
} else {
|
|
/* Otherwise allocate a structure, freed by the worker. */
|
|
TLBFlushRangeData *p = g_memdup(&d, sizeof(d));
|
|
async_run_on_cpu(cpu, tlb_flush_range_by_mmuidx_async_1,
|
|
RUN_ON_CPU_HOST_PTR(p));
|
|
}
|
|
}
|
|
|
|
void tlb_flush_page_bits_by_mmuidx(CPUState *cpu, vaddr addr,
|
|
uint16_t idxmap, unsigned bits)
|
|
{
|
|
tlb_flush_range_by_mmuidx(cpu, addr, TARGET_PAGE_SIZE, idxmap, bits);
|
|
}
|
|
|
|
void tlb_flush_range_by_mmuidx_all_cpus(CPUState *src_cpu,
|
|
vaddr addr, vaddr len,
|
|
uint16_t idxmap, unsigned bits)
|
|
{
|
|
TLBFlushRangeData d;
|
|
CPUState *dst_cpu;
|
|
|
|
/*
|
|
* If all bits are significant, and len is small,
|
|
* this devolves to tlb_flush_page.
|
|
*/
|
|
if (bits >= TARGET_LONG_BITS && len <= TARGET_PAGE_SIZE) {
|
|
tlb_flush_page_by_mmuidx_all_cpus(src_cpu, addr, idxmap);
|
|
return;
|
|
}
|
|
/* If no page bits are significant, this devolves to tlb_flush. */
|
|
if (bits < TARGET_PAGE_BITS) {
|
|
tlb_flush_by_mmuidx_all_cpus(src_cpu, idxmap);
|
|
return;
|
|
}
|
|
|
|
/* This should already be page aligned */
|
|
d.addr = addr & TARGET_PAGE_MASK;
|
|
d.len = len;
|
|
d.idxmap = idxmap;
|
|
d.bits = bits;
|
|
|
|
/* Allocate a separate data block for each destination cpu. */
|
|
CPU_FOREACH(dst_cpu) {
|
|
if (dst_cpu != src_cpu) {
|
|
TLBFlushRangeData *p = g_memdup(&d, sizeof(d));
|
|
async_run_on_cpu(dst_cpu,
|
|
tlb_flush_range_by_mmuidx_async_1,
|
|
RUN_ON_CPU_HOST_PTR(p));
|
|
}
|
|
}
|
|
|
|
tlb_flush_range_by_mmuidx_async_0(src_cpu, d);
|
|
}
|
|
|
|
void tlb_flush_page_bits_by_mmuidx_all_cpus(CPUState *src_cpu,
|
|
vaddr addr, uint16_t idxmap,
|
|
unsigned bits)
|
|
{
|
|
tlb_flush_range_by_mmuidx_all_cpus(src_cpu, addr, TARGET_PAGE_SIZE,
|
|
idxmap, bits);
|
|
}
|
|
|
|
void tlb_flush_range_by_mmuidx_all_cpus_synced(CPUState *src_cpu,
|
|
vaddr addr,
|
|
vaddr len,
|
|
uint16_t idxmap,
|
|
unsigned bits)
|
|
{
|
|
TLBFlushRangeData d, *p;
|
|
CPUState *dst_cpu;
|
|
|
|
/*
|
|
* If all bits are significant, and len is small,
|
|
* this devolves to tlb_flush_page.
|
|
*/
|
|
if (bits >= TARGET_LONG_BITS && len <= TARGET_PAGE_SIZE) {
|
|
tlb_flush_page_by_mmuidx_all_cpus_synced(src_cpu, addr, idxmap);
|
|
return;
|
|
}
|
|
/* If no page bits are significant, this devolves to tlb_flush. */
|
|
if (bits < TARGET_PAGE_BITS) {
|
|
tlb_flush_by_mmuidx_all_cpus_synced(src_cpu, idxmap);
|
|
return;
|
|
}
|
|
|
|
/* This should already be page aligned */
|
|
d.addr = addr & TARGET_PAGE_MASK;
|
|
d.len = len;
|
|
d.idxmap = idxmap;
|
|
d.bits = bits;
|
|
|
|
/* Allocate a separate data block for each destination cpu. */
|
|
CPU_FOREACH(dst_cpu) {
|
|
if (dst_cpu != src_cpu) {
|
|
p = g_memdup(&d, sizeof(d));
|
|
async_run_on_cpu(dst_cpu, tlb_flush_range_by_mmuidx_async_1,
|
|
RUN_ON_CPU_HOST_PTR(p));
|
|
}
|
|
}
|
|
|
|
p = g_memdup(&d, sizeof(d));
|
|
async_safe_run_on_cpu(src_cpu, tlb_flush_range_by_mmuidx_async_1,
|
|
RUN_ON_CPU_HOST_PTR(p));
|
|
}
|
|
|
|
void tlb_flush_page_bits_by_mmuidx_all_cpus_synced(CPUState *src_cpu,
|
|
vaddr addr,
|
|
uint16_t idxmap,
|
|
unsigned bits)
|
|
{
|
|
tlb_flush_range_by_mmuidx_all_cpus_synced(src_cpu, addr, TARGET_PAGE_SIZE,
|
|
idxmap, bits);
|
|
}
|
|
|
|
/* update the TLBs so that writes to code in the virtual page 'addr'
|
|
can be detected */
|
|
void tlb_protect_code(ram_addr_t ram_addr)
|
|
{
|
|
cpu_physical_memory_test_and_clear_dirty(ram_addr & TARGET_PAGE_MASK,
|
|
TARGET_PAGE_SIZE,
|
|
DIRTY_MEMORY_CODE);
|
|
}
|
|
|
|
/* update the TLB so that writes in physical page 'phys_addr' are no longer
|
|
tested for self modifying code */
|
|
void tlb_unprotect_code(ram_addr_t ram_addr)
|
|
{
|
|
cpu_physical_memory_set_dirty_flag(ram_addr, DIRTY_MEMORY_CODE);
|
|
}
|
|
|
|
|
|
/*
|
|
* Dirty write flag handling
|
|
*
|
|
* When the TCG code writes to a location it looks up the address in
|
|
* the TLB and uses that data to compute the final address. If any of
|
|
* the lower bits of the address are set then the slow path is forced.
|
|
* There are a number of reasons to do this but for normal RAM the
|
|
* most usual is detecting writes to code regions which may invalidate
|
|
* generated code.
|
|
*
|
|
* Other vCPUs might be reading their TLBs during guest execution, so we update
|
|
* te->addr_write with qatomic_set. We don't need to worry about this for
|
|
* oversized guests as MTTCG is disabled for them.
|
|
*
|
|
* Called with tlb_c.lock held.
|
|
*/
|
|
static void tlb_reset_dirty_range_locked(CPUTLBEntry *tlb_entry,
|
|
uintptr_t start, uintptr_t length)
|
|
{
|
|
uintptr_t addr = tlb_entry->addr_write;
|
|
|
|
if ((addr & (TLB_INVALID_MASK | TLB_MMIO |
|
|
TLB_DISCARD_WRITE | TLB_NOTDIRTY)) == 0) {
|
|
addr &= TARGET_PAGE_MASK;
|
|
addr += tlb_entry->addend;
|
|
if ((addr - start) < length) {
|
|
#if TARGET_LONG_BITS == 32
|
|
uint32_t *ptr_write = (uint32_t *)&tlb_entry->addr_write;
|
|
ptr_write += HOST_BIG_ENDIAN;
|
|
qatomic_set(ptr_write, *ptr_write | TLB_NOTDIRTY);
|
|
#elif TCG_OVERSIZED_GUEST
|
|
tlb_entry->addr_write |= TLB_NOTDIRTY;
|
|
#else
|
|
qatomic_set(&tlb_entry->addr_write,
|
|
tlb_entry->addr_write | TLB_NOTDIRTY);
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Called with tlb_c.lock held.
|
|
* Called only from the vCPU context, i.e. the TLB's owner thread.
|
|
*/
|
|
static inline void copy_tlb_helper_locked(CPUTLBEntry *d, const CPUTLBEntry *s)
|
|
{
|
|
*d = *s;
|
|
}
|
|
|
|
/* This is a cross vCPU call (i.e. another vCPU resetting the flags of
|
|
* the target vCPU).
|
|
* We must take tlb_c.lock to avoid racing with another vCPU update. The only
|
|
* thing actually updated is the target TLB entry ->addr_write flags.
|
|
*/
|
|
void tlb_reset_dirty(CPUState *cpu, ram_addr_t start1, ram_addr_t length)
|
|
{
|
|
CPUArchState *env;
|
|
|
|
int mmu_idx;
|
|
|
|
env = cpu->env_ptr;
|
|
qemu_spin_lock(&env_tlb(env)->c.lock);
|
|
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
|
|
unsigned int i;
|
|
unsigned int n = tlb_n_entries(&env_tlb(env)->f[mmu_idx]);
|
|
|
|
for (i = 0; i < n; i++) {
|
|
tlb_reset_dirty_range_locked(&env_tlb(env)->f[mmu_idx].table[i],
|
|
start1, length);
|
|
}
|
|
|
|
for (i = 0; i < CPU_VTLB_SIZE; i++) {
|
|
tlb_reset_dirty_range_locked(&env_tlb(env)->d[mmu_idx].vtable[i],
|
|
start1, length);
|
|
}
|
|
}
|
|
qemu_spin_unlock(&env_tlb(env)->c.lock);
|
|
}
|
|
|
|
/* Called with tlb_c.lock held */
|
|
static inline void tlb_set_dirty1_locked(CPUTLBEntry *tlb_entry,
|
|
vaddr addr)
|
|
{
|
|
if (tlb_entry->addr_write == (addr | TLB_NOTDIRTY)) {
|
|
tlb_entry->addr_write = addr;
|
|
}
|
|
}
|
|
|
|
/* update the TLB corresponding to virtual page vaddr
|
|
so that it is no longer dirty */
|
|
void tlb_set_dirty(CPUState *cpu, vaddr addr)
|
|
{
|
|
CPUArchState *env = cpu->env_ptr;
|
|
int mmu_idx;
|
|
|
|
assert_cpu_is_self(cpu);
|
|
|
|
addr &= TARGET_PAGE_MASK;
|
|
qemu_spin_lock(&env_tlb(env)->c.lock);
|
|
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
|
|
tlb_set_dirty1_locked(tlb_entry(env, mmu_idx, addr), addr);
|
|
}
|
|
|
|
for (mmu_idx = 0; mmu_idx < NB_MMU_MODES; mmu_idx++) {
|
|
int k;
|
|
for (k = 0; k < CPU_VTLB_SIZE; k++) {
|
|
tlb_set_dirty1_locked(&env_tlb(env)->d[mmu_idx].vtable[k], addr);
|
|
}
|
|
}
|
|
qemu_spin_unlock(&env_tlb(env)->c.lock);
|
|
}
|
|
|
|
/* Our TLB does not support large pages, so remember the area covered by
|
|
large pages and trigger a full TLB flush if these are invalidated. */
|
|
static void tlb_add_large_page(CPUArchState *env, int mmu_idx,
|
|
vaddr addr, uint64_t size)
|
|
{
|
|
vaddr lp_addr = env_tlb(env)->d[mmu_idx].large_page_addr;
|
|
vaddr lp_mask = ~(size - 1);
|
|
|
|
if (lp_addr == (vaddr)-1) {
|
|
/* No previous large page. */
|
|
lp_addr = addr;
|
|
} else {
|
|
/* Extend the existing region to include the new page.
|
|
This is a compromise between unnecessary flushes and
|
|
the cost of maintaining a full variable size TLB. */
|
|
lp_mask &= env_tlb(env)->d[mmu_idx].large_page_mask;
|
|
while (((lp_addr ^ addr) & lp_mask) != 0) {
|
|
lp_mask <<= 1;
|
|
}
|
|
}
|
|
env_tlb(env)->d[mmu_idx].large_page_addr = lp_addr & lp_mask;
|
|
env_tlb(env)->d[mmu_idx].large_page_mask = lp_mask;
|
|
}
|
|
|
|
static inline void tlb_set_compare(CPUTLBEntryFull *full, CPUTLBEntry *ent,
|
|
target_ulong address, int flags,
|
|
MMUAccessType access_type, bool enable)
|
|
{
|
|
if (enable) {
|
|
address |= flags & TLB_FLAGS_MASK;
|
|
flags &= TLB_SLOW_FLAGS_MASK;
|
|
if (flags) {
|
|
address |= TLB_FORCE_SLOW;
|
|
}
|
|
} else {
|
|
address = -1;
|
|
flags = 0;
|
|
}
|
|
ent->addr_idx[access_type] = address;
|
|
full->slow_flags[access_type] = flags;
|
|
}
|
|
|
|
/*
|
|
* Add a new TLB entry. At most one entry for a given virtual address
|
|
* is permitted. Only a single TARGET_PAGE_SIZE region is mapped, the
|
|
* supplied size is only used by tlb_flush_page.
|
|
*
|
|
* Called from TCG-generated code, which is under an RCU read-side
|
|
* critical section.
|
|
*/
|
|
void tlb_set_page_full(CPUState *cpu, int mmu_idx,
|
|
vaddr addr, CPUTLBEntryFull *full)
|
|
{
|
|
CPUArchState *env = cpu->env_ptr;
|
|
CPUTLB *tlb = env_tlb(env);
|
|
CPUTLBDesc *desc = &tlb->d[mmu_idx];
|
|
MemoryRegionSection *section;
|
|
unsigned int index, read_flags, write_flags;
|
|
uintptr_t addend;
|
|
CPUTLBEntry *te, tn;
|
|
hwaddr iotlb, xlat, sz, paddr_page;
|
|
vaddr addr_page;
|
|
int asidx, wp_flags, prot;
|
|
bool is_ram, is_romd;
|
|
|
|
assert_cpu_is_self(cpu);
|
|
|
|
if (full->lg_page_size <= TARGET_PAGE_BITS) {
|
|
sz = TARGET_PAGE_SIZE;
|
|
} else {
|
|
sz = (hwaddr)1 << full->lg_page_size;
|
|
tlb_add_large_page(env, mmu_idx, addr, sz);
|
|
}
|
|
addr_page = addr & TARGET_PAGE_MASK;
|
|
paddr_page = full->phys_addr & TARGET_PAGE_MASK;
|
|
|
|
prot = full->prot;
|
|
asidx = cpu_asidx_from_attrs(cpu, full->attrs);
|
|
section = address_space_translate_for_iotlb(cpu, asidx, paddr_page,
|
|
&xlat, &sz, full->attrs, &prot);
|
|
assert(sz >= TARGET_PAGE_SIZE);
|
|
|
|
tlb_debug("vaddr=%016" VADDR_PRIx " paddr=0x" HWADDR_FMT_plx
|
|
" prot=%x idx=%d\n",
|
|
addr, full->phys_addr, prot, mmu_idx);
|
|
|
|
read_flags = 0;
|
|
if (full->lg_page_size < TARGET_PAGE_BITS) {
|
|
/* Repeat the MMU check and TLB fill on every access. */
|
|
read_flags |= TLB_INVALID_MASK;
|
|
}
|
|
if (full->attrs.byte_swap) {
|
|
read_flags |= TLB_BSWAP;
|
|
}
|
|
|
|
is_ram = memory_region_is_ram(section->mr);
|
|
is_romd = memory_region_is_romd(section->mr);
|
|
|
|
if (is_ram || is_romd) {
|
|
/* RAM and ROMD both have associated host memory. */
|
|
addend = (uintptr_t)memory_region_get_ram_ptr(section->mr) + xlat;
|
|
} else {
|
|
/* I/O does not; force the host address to NULL. */
|
|
addend = 0;
|
|
}
|
|
|
|
write_flags = read_flags;
|
|
if (is_ram) {
|
|
iotlb = memory_region_get_ram_addr(section->mr) + xlat;
|
|
/*
|
|
* Computing is_clean is expensive; avoid all that unless
|
|
* the page is actually writable.
|
|
*/
|
|
if (prot & PAGE_WRITE) {
|
|
if (section->readonly) {
|
|
write_flags |= TLB_DISCARD_WRITE;
|
|
} else if (cpu_physical_memory_is_clean(iotlb)) {
|
|
write_flags |= TLB_NOTDIRTY;
|
|
}
|
|
}
|
|
} else {
|
|
/* I/O or ROMD */
|
|
iotlb = memory_region_section_get_iotlb(cpu, section) + xlat;
|
|
/*
|
|
* Writes to romd devices must go through MMIO to enable write.
|
|
* Reads to romd devices go through the ram_ptr found above,
|
|
* but of course reads to I/O must go through MMIO.
|
|
*/
|
|
write_flags |= TLB_MMIO;
|
|
if (!is_romd) {
|
|
read_flags = write_flags;
|
|
}
|
|
}
|
|
|
|
wp_flags = cpu_watchpoint_address_matches(cpu, addr_page,
|
|
TARGET_PAGE_SIZE);
|
|
|
|
index = tlb_index(env, mmu_idx, addr_page);
|
|
te = tlb_entry(env, mmu_idx, addr_page);
|
|
|
|
/*
|
|
* Hold the TLB lock for the rest of the function. We could acquire/release
|
|
* the lock several times in the function, but it is faster to amortize the
|
|
* acquisition cost by acquiring it just once. Note that this leads to
|
|
* a longer critical section, but this is not a concern since the TLB lock
|
|
* is unlikely to be contended.
|
|
*/
|
|
qemu_spin_lock(&tlb->c.lock);
|
|
|
|
/* Note that the tlb is no longer clean. */
|
|
tlb->c.dirty |= 1 << mmu_idx;
|
|
|
|
/* Make sure there's no cached translation for the new page. */
|
|
tlb_flush_vtlb_page_locked(env, mmu_idx, addr_page);
|
|
|
|
/*
|
|
* Only evict the old entry to the victim tlb if it's for a
|
|
* different page; otherwise just overwrite the stale data.
|
|
*/
|
|
if (!tlb_hit_page_anyprot(te, addr_page) && !tlb_entry_is_empty(te)) {
|
|
unsigned vidx = desc->vindex++ % CPU_VTLB_SIZE;
|
|
CPUTLBEntry *tv = &desc->vtable[vidx];
|
|
|
|
/* Evict the old entry into the victim tlb. */
|
|
copy_tlb_helper_locked(tv, te);
|
|
desc->vfulltlb[vidx] = desc->fulltlb[index];
|
|
tlb_n_used_entries_dec(env, mmu_idx);
|
|
}
|
|
|
|
/* refill the tlb */
|
|
/*
|
|
* At this point iotlb contains a physical section number in the lower
|
|
* TARGET_PAGE_BITS, and either
|
|
* + the ram_addr_t of the page base of the target RAM (RAM)
|
|
* + the offset within section->mr of the page base (I/O, ROMD)
|
|
* We subtract addr_page (which is page aligned and thus won't
|
|
* disturb the low bits) to give an offset which can be added to the
|
|
* (non-page-aligned) vaddr of the eventual memory access to get
|
|
* the MemoryRegion offset for the access. Note that the vaddr we
|
|
* subtract here is that of the page base, and not the same as the
|
|
* vaddr we add back in io_readx()/io_writex()/get_page_addr_code().
|
|
*/
|
|
desc->fulltlb[index] = *full;
|
|
full = &desc->fulltlb[index];
|
|
full->xlat_section = iotlb - addr_page;
|
|
full->phys_addr = paddr_page;
|
|
|
|
/* Now calculate the new entry */
|
|
tn.addend = addend - addr_page;
|
|
|
|
tlb_set_compare(full, &tn, addr_page, read_flags,
|
|
MMU_INST_FETCH, prot & PAGE_EXEC);
|
|
|
|
if (wp_flags & BP_MEM_READ) {
|
|
read_flags |= TLB_WATCHPOINT;
|
|
}
|
|
tlb_set_compare(full, &tn, addr_page, read_flags,
|
|
MMU_DATA_LOAD, prot & PAGE_READ);
|
|
|
|
if (prot & PAGE_WRITE_INV) {
|
|
write_flags |= TLB_INVALID_MASK;
|
|
}
|
|
if (wp_flags & BP_MEM_WRITE) {
|
|
write_flags |= TLB_WATCHPOINT;
|
|
}
|
|
tlb_set_compare(full, &tn, addr_page, write_flags,
|
|
MMU_DATA_STORE, prot & PAGE_WRITE);
|
|
|
|
copy_tlb_helper_locked(te, &tn);
|
|
tlb_n_used_entries_inc(env, mmu_idx);
|
|
qemu_spin_unlock(&tlb->c.lock);
|
|
}
|
|
|
|
void tlb_set_page_with_attrs(CPUState *cpu, vaddr addr,
|
|
hwaddr paddr, MemTxAttrs attrs, int prot,
|
|
int mmu_idx, uint64_t size)
|
|
{
|
|
CPUTLBEntryFull full = {
|
|
.phys_addr = paddr,
|
|
.attrs = attrs,
|
|
.prot = prot,
|
|
.lg_page_size = ctz64(size)
|
|
};
|
|
|
|
assert(is_power_of_2(size));
|
|
tlb_set_page_full(cpu, mmu_idx, addr, &full);
|
|
}
|
|
|
|
void tlb_set_page(CPUState *cpu, vaddr addr,
|
|
hwaddr paddr, int prot,
|
|
int mmu_idx, uint64_t size)
|
|
{
|
|
tlb_set_page_with_attrs(cpu, addr, paddr, MEMTXATTRS_UNSPECIFIED,
|
|
prot, mmu_idx, size);
|
|
}
|
|
|
|
/*
|
|
* Note: tlb_fill() can trigger a resize of the TLB. This means that all of the
|
|
* caller's prior references to the TLB table (e.g. CPUTLBEntry pointers) must
|
|
* be discarded and looked up again (e.g. via tlb_entry()).
|
|
*/
|
|
static void tlb_fill(CPUState *cpu, vaddr addr, int size,
|
|
MMUAccessType access_type, int mmu_idx, uintptr_t retaddr)
|
|
{
|
|
bool ok;
|
|
|
|
/*
|
|
* This is not a probe, so only valid return is success; failure
|
|
* should result in exception + longjmp to the cpu loop.
|
|
*/
|
|
ok = cpu->cc->tcg_ops->tlb_fill(cpu, addr, size,
|
|
access_type, mmu_idx, false, retaddr);
|
|
assert(ok);
|
|
}
|
|
|
|
static inline void cpu_unaligned_access(CPUState *cpu, vaddr addr,
|
|
MMUAccessType access_type,
|
|
int mmu_idx, uintptr_t retaddr)
|
|
{
|
|
cpu->cc->tcg_ops->do_unaligned_access(cpu, addr, access_type,
|
|
mmu_idx, retaddr);
|
|
}
|
|
|
|
static inline void cpu_transaction_failed(CPUState *cpu, hwaddr physaddr,
|
|
vaddr addr, unsigned size,
|
|
MMUAccessType access_type,
|
|
int mmu_idx, MemTxAttrs attrs,
|
|
MemTxResult response,
|
|
uintptr_t retaddr)
|
|
{
|
|
CPUClass *cc = CPU_GET_CLASS(cpu);
|
|
|
|
if (!cpu->ignore_memory_transaction_failures &&
|
|
cc->tcg_ops->do_transaction_failed) {
|
|
cc->tcg_ops->do_transaction_failed(cpu, physaddr, addr, size,
|
|
access_type, mmu_idx, attrs,
|
|
response, retaddr);
|
|
}
|
|
}
|
|
|
|
static uint64_t io_readx(CPUArchState *env, CPUTLBEntryFull *full,
|
|
int mmu_idx, vaddr addr, uintptr_t retaddr,
|
|
MMUAccessType access_type, MemOp op)
|
|
{
|
|
CPUState *cpu = env_cpu(env);
|
|
hwaddr mr_offset;
|
|
MemoryRegionSection *section;
|
|
MemoryRegion *mr;
|
|
uint64_t val;
|
|
MemTxResult r;
|
|
|
|
section = iotlb_to_section(cpu, full->xlat_section, full->attrs);
|
|
mr = section->mr;
|
|
mr_offset = (full->xlat_section & TARGET_PAGE_MASK) + addr;
|
|
cpu->mem_io_pc = retaddr;
|
|
if (!cpu->can_do_io) {
|
|
cpu_io_recompile(cpu, retaddr);
|
|
}
|
|
|
|
{
|
|
QEMU_IOTHREAD_LOCK_GUARD();
|
|
r = memory_region_dispatch_read(mr, mr_offset, &val, op, full->attrs);
|
|
}
|
|
|
|
if (r != MEMTX_OK) {
|
|
hwaddr physaddr = mr_offset +
|
|
section->offset_within_address_space -
|
|
section->offset_within_region;
|
|
|
|
cpu_transaction_failed(cpu, physaddr, addr, memop_size(op), access_type,
|
|
mmu_idx, full->attrs, r, retaddr);
|
|
}
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* Save a potentially trashed CPUTLBEntryFull for later lookup by plugin.
|
|
* This is read by tlb_plugin_lookup if the fulltlb entry doesn't match
|
|
* because of the side effect of io_writex changing memory layout.
|
|
*/
|
|
static void save_iotlb_data(CPUState *cs, MemoryRegionSection *section,
|
|
hwaddr mr_offset)
|
|
{
|
|
#ifdef CONFIG_PLUGIN
|
|
SavedIOTLB *saved = &cs->saved_iotlb;
|
|
saved->section = section;
|
|
saved->mr_offset = mr_offset;
|
|
#endif
|
|
}
|
|
|
|
static void io_writex(CPUArchState *env, CPUTLBEntryFull *full,
|
|
int mmu_idx, uint64_t val, vaddr addr,
|
|
uintptr_t retaddr, MemOp op)
|
|
{
|
|
CPUState *cpu = env_cpu(env);
|
|
hwaddr mr_offset;
|
|
MemoryRegionSection *section;
|
|
MemoryRegion *mr;
|
|
MemTxResult r;
|
|
|
|
section = iotlb_to_section(cpu, full->xlat_section, full->attrs);
|
|
mr = section->mr;
|
|
mr_offset = (full->xlat_section & TARGET_PAGE_MASK) + addr;
|
|
if (!cpu->can_do_io) {
|
|
cpu_io_recompile(cpu, retaddr);
|
|
}
|
|
cpu->mem_io_pc = retaddr;
|
|
|
|
/*
|
|
* The memory_region_dispatch may trigger a flush/resize
|
|
* so for plugins we save the iotlb_data just in case.
|
|
*/
|
|
save_iotlb_data(cpu, section, mr_offset);
|
|
|
|
{
|
|
QEMU_IOTHREAD_LOCK_GUARD();
|
|
r = memory_region_dispatch_write(mr, mr_offset, val, op, full->attrs);
|
|
}
|
|
|
|
if (r != MEMTX_OK) {
|
|
hwaddr physaddr = mr_offset +
|
|
section->offset_within_address_space -
|
|
section->offset_within_region;
|
|
|
|
cpu_transaction_failed(cpu, physaddr, addr, memop_size(op),
|
|
MMU_DATA_STORE, mmu_idx, full->attrs, r,
|
|
retaddr);
|
|
}
|
|
}
|
|
|
|
/* Return true if ADDR is present in the victim tlb, and has been copied
|
|
back to the main tlb. */
|
|
static bool victim_tlb_hit(CPUArchState *env, size_t mmu_idx, size_t index,
|
|
MMUAccessType access_type, vaddr page)
|
|
{
|
|
size_t vidx;
|
|
|
|
assert_cpu_is_self(env_cpu(env));
|
|
for (vidx = 0; vidx < CPU_VTLB_SIZE; ++vidx) {
|
|
CPUTLBEntry *vtlb = &env_tlb(env)->d[mmu_idx].vtable[vidx];
|
|
uint64_t cmp = tlb_read_idx(vtlb, access_type);
|
|
|
|
if (cmp == page) {
|
|
/* Found entry in victim tlb, swap tlb and iotlb. */
|
|
CPUTLBEntry tmptlb, *tlb = &env_tlb(env)->f[mmu_idx].table[index];
|
|
|
|
qemu_spin_lock(&env_tlb(env)->c.lock);
|
|
copy_tlb_helper_locked(&tmptlb, tlb);
|
|
copy_tlb_helper_locked(tlb, vtlb);
|
|
copy_tlb_helper_locked(vtlb, &tmptlb);
|
|
qemu_spin_unlock(&env_tlb(env)->c.lock);
|
|
|
|
CPUTLBEntryFull *f1 = &env_tlb(env)->d[mmu_idx].fulltlb[index];
|
|
CPUTLBEntryFull *f2 = &env_tlb(env)->d[mmu_idx].vfulltlb[vidx];
|
|
CPUTLBEntryFull tmpf;
|
|
tmpf = *f1; *f1 = *f2; *f2 = tmpf;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static void notdirty_write(CPUState *cpu, vaddr mem_vaddr, unsigned size,
|
|
CPUTLBEntryFull *full, uintptr_t retaddr)
|
|
{
|
|
ram_addr_t ram_addr = mem_vaddr + full->xlat_section;
|
|
|
|
trace_memory_notdirty_write_access(mem_vaddr, ram_addr, size);
|
|
|
|
if (!cpu_physical_memory_get_dirty_flag(ram_addr, DIRTY_MEMORY_CODE)) {
|
|
tb_invalidate_phys_range_fast(ram_addr, size, retaddr);
|
|
}
|
|
|
|
/*
|
|
* Set both VGA and migration bits for simplicity and to remove
|
|
* the notdirty callback faster.
|
|
*/
|
|
cpu_physical_memory_set_dirty_range(ram_addr, size, DIRTY_CLIENTS_NOCODE);
|
|
|
|
/* We remove the notdirty callback only if the code has been flushed. */
|
|
if (!cpu_physical_memory_is_clean(ram_addr)) {
|
|
trace_memory_notdirty_set_dirty(mem_vaddr);
|
|
tlb_set_dirty(cpu, mem_vaddr);
|
|
}
|
|
}
|
|
|
|
static int probe_access_internal(CPUArchState *env, vaddr addr,
|
|
int fault_size, MMUAccessType access_type,
|
|
int mmu_idx, bool nonfault,
|
|
void **phost, CPUTLBEntryFull **pfull,
|
|
uintptr_t retaddr, bool check_mem_cbs)
|
|
{
|
|
uintptr_t index = tlb_index(env, mmu_idx, addr);
|
|
CPUTLBEntry *entry = tlb_entry(env, mmu_idx, addr);
|
|
uint64_t tlb_addr = tlb_read_idx(entry, access_type);
|
|
vaddr page_addr = addr & TARGET_PAGE_MASK;
|
|
int flags = TLB_FLAGS_MASK & ~TLB_FORCE_SLOW;
|
|
bool force_mmio = check_mem_cbs && cpu_plugin_mem_cbs_enabled(env_cpu(env));
|
|
CPUTLBEntryFull *full;
|
|
|
|
if (!tlb_hit_page(tlb_addr, page_addr)) {
|
|
if (!victim_tlb_hit(env, mmu_idx, index, access_type, page_addr)) {
|
|
CPUState *cs = env_cpu(env);
|
|
|
|
if (!cs->cc->tcg_ops->tlb_fill(cs, addr, fault_size, access_type,
|
|
mmu_idx, nonfault, retaddr)) {
|
|
/* Non-faulting page table read failed. */
|
|
*phost = NULL;
|
|
*pfull = NULL;
|
|
return TLB_INVALID_MASK;
|
|
}
|
|
|
|
/* TLB resize via tlb_fill may have moved the entry. */
|
|
index = tlb_index(env, mmu_idx, addr);
|
|
entry = tlb_entry(env, mmu_idx, addr);
|
|
|
|
/*
|
|
* With PAGE_WRITE_INV, we set TLB_INVALID_MASK immediately,
|
|
* to force the next access through tlb_fill. We've just
|
|
* called tlb_fill, so we know that this entry *is* valid.
|
|
*/
|
|
flags &= ~TLB_INVALID_MASK;
|
|
}
|
|
tlb_addr = tlb_read_idx(entry, access_type);
|
|
}
|
|
flags &= tlb_addr;
|
|
|
|
*pfull = full = &env_tlb(env)->d[mmu_idx].fulltlb[index];
|
|
flags |= full->slow_flags[access_type];
|
|
|
|
/* Fold all "mmio-like" bits into TLB_MMIO. This is not RAM. */
|
|
if (unlikely(flags & ~(TLB_WATCHPOINT | TLB_NOTDIRTY))
|
|
||
|
|
(access_type != MMU_INST_FETCH && force_mmio)) {
|
|
*phost = NULL;
|
|
return TLB_MMIO;
|
|
}
|
|
|
|
/* Everything else is RAM. */
|
|
*phost = (void *)((uintptr_t)addr + entry->addend);
|
|
return flags;
|
|
}
|
|
|
|
int probe_access_full(CPUArchState *env, vaddr addr, int size,
|
|
MMUAccessType access_type, int mmu_idx,
|
|
bool nonfault, void **phost, CPUTLBEntryFull **pfull,
|
|
uintptr_t retaddr)
|
|
{
|
|
int flags = probe_access_internal(env, addr, size, access_type, mmu_idx,
|
|
nonfault, phost, pfull, retaddr, true);
|
|
|
|
/* Handle clean RAM pages. */
|
|
if (unlikely(flags & TLB_NOTDIRTY)) {
|
|
notdirty_write(env_cpu(env), addr, 1, *pfull, retaddr);
|
|
flags &= ~TLB_NOTDIRTY;
|
|
}
|
|
|
|
return flags;
|
|
}
|
|
|
|
int probe_access_full_mmu(CPUArchState *env, vaddr addr, int size,
|
|
MMUAccessType access_type, int mmu_idx,
|
|
void **phost, CPUTLBEntryFull **pfull)
|
|
{
|
|
void *discard_phost;
|
|
CPUTLBEntryFull *discard_tlb;
|
|
|
|
/* privately handle users that don't need full results */
|
|
phost = phost ? phost : &discard_phost;
|
|
pfull = pfull ? pfull : &discard_tlb;
|
|
|
|
int flags = probe_access_internal(env, addr, size, access_type, mmu_idx,
|
|
true, phost, pfull, 0, false);
|
|
|
|
/* Handle clean RAM pages. */
|
|
if (unlikely(flags & TLB_NOTDIRTY)) {
|
|
notdirty_write(env_cpu(env), addr, 1, *pfull, 0);
|
|
flags &= ~TLB_NOTDIRTY;
|
|
}
|
|
|
|
return flags;
|
|
}
|
|
|
|
int probe_access_flags(CPUArchState *env, vaddr addr, int size,
|
|
MMUAccessType access_type, int mmu_idx,
|
|
bool nonfault, void **phost, uintptr_t retaddr)
|
|
{
|
|
CPUTLBEntryFull *full;
|
|
int flags;
|
|
|
|
g_assert(-(addr | TARGET_PAGE_MASK) >= size);
|
|
|
|
flags = probe_access_internal(env, addr, size, access_type, mmu_idx,
|
|
nonfault, phost, &full, retaddr, true);
|
|
|
|
/* Handle clean RAM pages. */
|
|
if (unlikely(flags & TLB_NOTDIRTY)) {
|
|
notdirty_write(env_cpu(env), addr, 1, full, retaddr);
|
|
flags &= ~TLB_NOTDIRTY;
|
|
}
|
|
|
|
return flags;
|
|
}
|
|
|
|
void *probe_access(CPUArchState *env, vaddr addr, int size,
|
|
MMUAccessType access_type, int mmu_idx, uintptr_t retaddr)
|
|
{
|
|
CPUTLBEntryFull *full;
|
|
void *host;
|
|
int flags;
|
|
|
|
g_assert(-(addr | TARGET_PAGE_MASK) >= size);
|
|
|
|
flags = probe_access_internal(env, addr, size, access_type, mmu_idx,
|
|
false, &host, &full, retaddr, true);
|
|
|
|
/* Per the interface, size == 0 merely faults the access. */
|
|
if (size == 0) {
|
|
return NULL;
|
|
}
|
|
|
|
if (unlikely(flags & (TLB_NOTDIRTY | TLB_WATCHPOINT))) {
|
|
/* Handle watchpoints. */
|
|
if (flags & TLB_WATCHPOINT) {
|
|
int wp_access = (access_type == MMU_DATA_STORE
|
|
? BP_MEM_WRITE : BP_MEM_READ);
|
|
cpu_check_watchpoint(env_cpu(env), addr, size,
|
|
full->attrs, wp_access, retaddr);
|
|
}
|
|
|
|
/* Handle clean RAM pages. */
|
|
if (flags & TLB_NOTDIRTY) {
|
|
notdirty_write(env_cpu(env), addr, 1, full, retaddr);
|
|
}
|
|
}
|
|
|
|
return host;
|
|
}
|
|
|
|
void *tlb_vaddr_to_host(CPUArchState *env, abi_ptr addr,
|
|
MMUAccessType access_type, int mmu_idx)
|
|
{
|
|
CPUTLBEntryFull *full;
|
|
void *host;
|
|
int flags;
|
|
|
|
flags = probe_access_internal(env, addr, 0, access_type,
|
|
mmu_idx, true, &host, &full, 0, false);
|
|
|
|
/* No combination of flags are expected by the caller. */
|
|
return flags ? NULL : host;
|
|
}
|
|
|
|
/*
|
|
* Return a ram_addr_t for the virtual address for execution.
|
|
*
|
|
* Return -1 if we can't translate and execute from an entire page
|
|
* of RAM. This will force us to execute by loading and translating
|
|
* one insn at a time, without caching.
|
|
*
|
|
* NOTE: This function will trigger an exception if the page is
|
|
* not executable.
|
|
*/
|
|
tb_page_addr_t get_page_addr_code_hostp(CPUArchState *env, vaddr addr,
|
|
void **hostp)
|
|
{
|
|
CPUTLBEntryFull *full;
|
|
void *p;
|
|
|
|
(void)probe_access_internal(env, addr, 1, MMU_INST_FETCH,
|
|
cpu_mmu_index(env, true), false,
|
|
&p, &full, 0, false);
|
|
if (p == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
if (full->lg_page_size < TARGET_PAGE_BITS) {
|
|
return -1;
|
|
}
|
|
|
|
if (hostp) {
|
|
*hostp = p;
|
|
}
|
|
return qemu_ram_addr_from_host_nofail(p);
|
|
}
|
|
|
|
/* Load/store with atomicity primitives. */
|
|
#include "ldst_atomicity.c.inc"
|
|
|
|
#ifdef CONFIG_PLUGIN
|
|
/*
|
|
* Perform a TLB lookup and populate the qemu_plugin_hwaddr structure.
|
|
* This should be a hot path as we will have just looked this path up
|
|
* in the softmmu lookup code (or helper). We don't handle re-fills or
|
|
* checking the victim table. This is purely informational.
|
|
*
|
|
* This almost never fails as the memory access being instrumented
|
|
* should have just filled the TLB. The one corner case is io_writex
|
|
* which can cause TLB flushes and potential resizing of the TLBs
|
|
* losing the information we need. In those cases we need to recover
|
|
* data from a copy of the CPUTLBEntryFull. As long as this always occurs
|
|
* from the same thread (which a mem callback will be) this is safe.
|
|
*/
|
|
|
|
bool tlb_plugin_lookup(CPUState *cpu, vaddr addr, int mmu_idx,
|
|
bool is_store, struct qemu_plugin_hwaddr *data)
|
|
{
|
|
CPUArchState *env = cpu->env_ptr;
|
|
CPUTLBEntry *tlbe = tlb_entry(env, mmu_idx, addr);
|
|
uintptr_t index = tlb_index(env, mmu_idx, addr);
|
|
uint64_t tlb_addr = is_store ? tlb_addr_write(tlbe) : tlbe->addr_read;
|
|
|
|
if (likely(tlb_hit(tlb_addr, addr))) {
|
|
/* We must have an iotlb entry for MMIO */
|
|
if (tlb_addr & TLB_MMIO) {
|
|
CPUTLBEntryFull *full;
|
|
full = &env_tlb(env)->d[mmu_idx].fulltlb[index];
|
|
data->is_io = true;
|
|
data->v.io.section =
|
|
iotlb_to_section(cpu, full->xlat_section, full->attrs);
|
|
data->v.io.offset = (full->xlat_section & TARGET_PAGE_MASK) + addr;
|
|
} else {
|
|
data->is_io = false;
|
|
data->v.ram.hostaddr = (void *)((uintptr_t)addr + tlbe->addend);
|
|
}
|
|
return true;
|
|
} else {
|
|
SavedIOTLB *saved = &cpu->saved_iotlb;
|
|
data->is_io = true;
|
|
data->v.io.section = saved->section;
|
|
data->v.io.offset = saved->mr_offset;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Probe for a load/store operation.
|
|
* Return the host address and into @flags.
|
|
*/
|
|
|
|
typedef struct MMULookupPageData {
|
|
CPUTLBEntryFull *full;
|
|
void *haddr;
|
|
vaddr addr;
|
|
int flags;
|
|
int size;
|
|
} MMULookupPageData;
|
|
|
|
typedef struct MMULookupLocals {
|
|
MMULookupPageData page[2];
|
|
MemOp memop;
|
|
int mmu_idx;
|
|
} MMULookupLocals;
|
|
|
|
/**
|
|
* mmu_lookup1: translate one page
|
|
* @env: cpu context
|
|
* @data: lookup parameters
|
|
* @mmu_idx: virtual address context
|
|
* @access_type: load/store/code
|
|
* @ra: return address into tcg generated code, or 0
|
|
*
|
|
* Resolve the translation for the one page at @data.addr, filling in
|
|
* the rest of @data with the results. If the translation fails,
|
|
* tlb_fill will longjmp out. Return true if the softmmu tlb for
|
|
* @mmu_idx may have resized.
|
|
*/
|
|
static bool mmu_lookup1(CPUArchState *env, MMULookupPageData *data,
|
|
int mmu_idx, MMUAccessType access_type, uintptr_t ra)
|
|
{
|
|
vaddr addr = data->addr;
|
|
uintptr_t index = tlb_index(env, mmu_idx, addr);
|
|
CPUTLBEntry *entry = tlb_entry(env, mmu_idx, addr);
|
|
uint64_t tlb_addr = tlb_read_idx(entry, access_type);
|
|
bool maybe_resized = false;
|
|
CPUTLBEntryFull *full;
|
|
int flags;
|
|
|
|
/* If the TLB entry is for a different page, reload and try again. */
|
|
if (!tlb_hit(tlb_addr, addr)) {
|
|
if (!victim_tlb_hit(env, mmu_idx, index, access_type,
|
|
addr & TARGET_PAGE_MASK)) {
|
|
tlb_fill(env_cpu(env), addr, data->size, access_type, mmu_idx, ra);
|
|
maybe_resized = true;
|
|
index = tlb_index(env, mmu_idx, addr);
|
|
entry = tlb_entry(env, mmu_idx, addr);
|
|
}
|
|
tlb_addr = tlb_read_idx(entry, access_type) & ~TLB_INVALID_MASK;
|
|
}
|
|
|
|
full = &env_tlb(env)->d[mmu_idx].fulltlb[index];
|
|
flags = tlb_addr & (TLB_FLAGS_MASK & ~TLB_FORCE_SLOW);
|
|
flags |= full->slow_flags[access_type];
|
|
|
|
data->full = full;
|
|
data->flags = flags;
|
|
/* Compute haddr speculatively; depending on flags it might be invalid. */
|
|
data->haddr = (void *)((uintptr_t)addr + entry->addend);
|
|
|
|
return maybe_resized;
|
|
}
|
|
|
|
/**
|
|
* mmu_watch_or_dirty
|
|
* @env: cpu context
|
|
* @data: lookup parameters
|
|
* @access_type: load/store/code
|
|
* @ra: return address into tcg generated code, or 0
|
|
*
|
|
* Trigger watchpoints for @data.addr:@data.size;
|
|
* record writes to protected clean pages.
|
|
*/
|
|
static void mmu_watch_or_dirty(CPUArchState *env, MMULookupPageData *data,
|
|
MMUAccessType access_type, uintptr_t ra)
|
|
{
|
|
CPUTLBEntryFull *full = data->full;
|
|
vaddr addr = data->addr;
|
|
int flags = data->flags;
|
|
int size = data->size;
|
|
|
|
/* On watchpoint hit, this will longjmp out. */
|
|
if (flags & TLB_WATCHPOINT) {
|
|
int wp = access_type == MMU_DATA_STORE ? BP_MEM_WRITE : BP_MEM_READ;
|
|
cpu_check_watchpoint(env_cpu(env), addr, size, full->attrs, wp, ra);
|
|
flags &= ~TLB_WATCHPOINT;
|
|
}
|
|
|
|
/* Note that notdirty is only set for writes. */
|
|
if (flags & TLB_NOTDIRTY) {
|
|
notdirty_write(env_cpu(env), addr, size, full, ra);
|
|
flags &= ~TLB_NOTDIRTY;
|
|
}
|
|
data->flags = flags;
|
|
}
|
|
|
|
/**
|
|
* mmu_lookup: translate page(s)
|
|
* @env: cpu context
|
|
* @addr: virtual address
|
|
* @oi: combined mmu_idx and MemOp
|
|
* @ra: return address into tcg generated code, or 0
|
|
* @access_type: load/store/code
|
|
* @l: output result
|
|
*
|
|
* Resolve the translation for the page(s) beginning at @addr, for MemOp.size
|
|
* bytes. Return true if the lookup crosses a page boundary.
|
|
*/
|
|
static bool mmu_lookup(CPUArchState *env, vaddr addr, MemOpIdx oi,
|
|
uintptr_t ra, MMUAccessType type, MMULookupLocals *l)
|
|
{
|
|
unsigned a_bits;
|
|
bool crosspage;
|
|
int flags;
|
|
|
|
l->memop = get_memop(oi);
|
|
l->mmu_idx = get_mmuidx(oi);
|
|
|
|
tcg_debug_assert(l->mmu_idx < NB_MMU_MODES);
|
|
|
|
/* Handle CPU specific unaligned behaviour */
|
|
a_bits = get_alignment_bits(l->memop);
|
|
if (addr & ((1 << a_bits) - 1)) {
|
|
cpu_unaligned_access(env_cpu(env), addr, type, l->mmu_idx, ra);
|
|
}
|
|
|
|
l->page[0].addr = addr;
|
|
l->page[0].size = memop_size(l->memop);
|
|
l->page[1].addr = (addr + l->page[0].size - 1) & TARGET_PAGE_MASK;
|
|
l->page[1].size = 0;
|
|
crosspage = (addr ^ l->page[1].addr) & TARGET_PAGE_MASK;
|
|
|
|
if (likely(!crosspage)) {
|
|
mmu_lookup1(env, &l->page[0], l->mmu_idx, type, ra);
|
|
|
|
flags = l->page[0].flags;
|
|
if (unlikely(flags & (TLB_WATCHPOINT | TLB_NOTDIRTY))) {
|
|
mmu_watch_or_dirty(env, &l->page[0], type, ra);
|
|
}
|
|
if (unlikely(flags & TLB_BSWAP)) {
|
|
l->memop ^= MO_BSWAP;
|
|
}
|
|
} else {
|
|
/* Finish compute of page crossing. */
|
|
int size0 = l->page[1].addr - addr;
|
|
l->page[1].size = l->page[0].size - size0;
|
|
l->page[0].size = size0;
|
|
|
|
/*
|
|
* Lookup both pages, recognizing exceptions from either. If the
|
|
* second lookup potentially resized, refresh first CPUTLBEntryFull.
|
|
*/
|
|
mmu_lookup1(env, &l->page[0], l->mmu_idx, type, ra);
|
|
if (mmu_lookup1(env, &l->page[1], l->mmu_idx, type, ra)) {
|
|
uintptr_t index = tlb_index(env, l->mmu_idx, addr);
|
|
l->page[0].full = &env_tlb(env)->d[l->mmu_idx].fulltlb[index];
|
|
}
|
|
|
|
flags = l->page[0].flags | l->page[1].flags;
|
|
if (unlikely(flags & (TLB_WATCHPOINT | TLB_NOTDIRTY))) {
|
|
mmu_watch_or_dirty(env, &l->page[0], type, ra);
|
|
mmu_watch_or_dirty(env, &l->page[1], type, ra);
|
|
}
|
|
|
|
/*
|
|
* Since target/sparc is the only user of TLB_BSWAP, and all
|
|
* Sparc accesses are aligned, any treatment across two pages
|
|
* would be arbitrary. Refuse it until there's a use.
|
|
*/
|
|
tcg_debug_assert((flags & TLB_BSWAP) == 0);
|
|
}
|
|
|
|
return crosspage;
|
|
}
|
|
|
|
/*
|
|
* Probe for an atomic operation. Do not allow unaligned operations,
|
|
* or io operations to proceed. Return the host address.
|
|
*/
|
|
static void *atomic_mmu_lookup(CPUArchState *env, vaddr addr, MemOpIdx oi,
|
|
int size, uintptr_t retaddr)
|
|
{
|
|
uintptr_t mmu_idx = get_mmuidx(oi);
|
|
MemOp mop = get_memop(oi);
|
|
int a_bits = get_alignment_bits(mop);
|
|
uintptr_t index;
|
|
CPUTLBEntry *tlbe;
|
|
vaddr tlb_addr;
|
|
void *hostaddr;
|
|
CPUTLBEntryFull *full;
|
|
|
|
tcg_debug_assert(mmu_idx < NB_MMU_MODES);
|
|
|
|
/* Adjust the given return address. */
|
|
retaddr -= GETPC_ADJ;
|
|
|
|
/* Enforce guest required alignment. */
|
|
if (unlikely(a_bits > 0 && (addr & ((1 << a_bits) - 1)))) {
|
|
/* ??? Maybe indicate atomic op to cpu_unaligned_access */
|
|
cpu_unaligned_access(env_cpu(env), addr, MMU_DATA_STORE,
|
|
mmu_idx, retaddr);
|
|
}
|
|
|
|
/* Enforce qemu required alignment. */
|
|
if (unlikely(addr & (size - 1))) {
|
|
/* We get here if guest alignment was not requested,
|
|
or was not enforced by cpu_unaligned_access above.
|
|
We might widen the access and emulate, but for now
|
|
mark an exception and exit the cpu loop. */
|
|
goto stop_the_world;
|
|
}
|
|
|
|
index = tlb_index(env, mmu_idx, addr);
|
|
tlbe = tlb_entry(env, mmu_idx, addr);
|
|
|
|
/* Check TLB entry and enforce page permissions. */
|
|
tlb_addr = tlb_addr_write(tlbe);
|
|
if (!tlb_hit(tlb_addr, addr)) {
|
|
if (!victim_tlb_hit(env, mmu_idx, index, MMU_DATA_STORE,
|
|
addr & TARGET_PAGE_MASK)) {
|
|
tlb_fill(env_cpu(env), addr, size,
|
|
MMU_DATA_STORE, mmu_idx, retaddr);
|
|
index = tlb_index(env, mmu_idx, addr);
|
|
tlbe = tlb_entry(env, mmu_idx, addr);
|
|
}
|
|
tlb_addr = tlb_addr_write(tlbe) & ~TLB_INVALID_MASK;
|
|
}
|
|
|
|
/*
|
|
* Let the guest notice RMW on a write-only page.
|
|
* We have just verified that the page is writable.
|
|
* Subpage lookups may have left TLB_INVALID_MASK set,
|
|
* but addr_read will only be -1 if PAGE_READ was unset.
|
|
*/
|
|
if (unlikely(tlbe->addr_read == -1)) {
|
|
tlb_fill(env_cpu(env), addr, size, MMU_DATA_LOAD, mmu_idx, retaddr);
|
|
/*
|
|
* Since we don't support reads and writes to different
|
|
* addresses, and we do have the proper page loaded for
|
|
* write, this shouldn't ever return. But just in case,
|
|
* handle via stop-the-world.
|
|
*/
|
|
goto stop_the_world;
|
|
}
|
|
/* Collect tlb flags for read. */
|
|
tlb_addr |= tlbe->addr_read;
|
|
|
|
/* Notice an IO access or a needs-MMU-lookup access */
|
|
if (unlikely(tlb_addr & (TLB_MMIO | TLB_DISCARD_WRITE))) {
|
|
/* There's really nothing that can be done to
|
|
support this apart from stop-the-world. */
|
|
goto stop_the_world;
|
|
}
|
|
|
|
hostaddr = (void *)((uintptr_t)addr + tlbe->addend);
|
|
full = &env_tlb(env)->d[mmu_idx].fulltlb[index];
|
|
|
|
if (unlikely(tlb_addr & TLB_NOTDIRTY)) {
|
|
notdirty_write(env_cpu(env), addr, size, full, retaddr);
|
|
}
|
|
|
|
if (unlikely(tlb_addr & TLB_FORCE_SLOW)) {
|
|
int wp_flags = 0;
|
|
|
|
if (full->slow_flags[MMU_DATA_STORE] & TLB_WATCHPOINT) {
|
|
wp_flags |= BP_MEM_WRITE;
|
|
}
|
|
if (full->slow_flags[MMU_DATA_LOAD] & TLB_WATCHPOINT) {
|
|
wp_flags |= BP_MEM_READ;
|
|
}
|
|
if (wp_flags) {
|
|
cpu_check_watchpoint(env_cpu(env), addr, size,
|
|
full->attrs, wp_flags, retaddr);
|
|
}
|
|
}
|
|
|
|
return hostaddr;
|
|
|
|
stop_the_world:
|
|
cpu_loop_exit_atomic(env_cpu(env), retaddr);
|
|
}
|
|
|
|
/*
|
|
* Load Helpers
|
|
*
|
|
* We support two different access types. SOFTMMU_CODE_ACCESS is
|
|
* specifically for reading instructions from system memory. It is
|
|
* called by the translation loop and in some helpers where the code
|
|
* is disassembled. It shouldn't be called directly by guest code.
|
|
*
|
|
* For the benefit of TCG generated code, we want to avoid the
|
|
* complication of ABI-specific return type promotion and always
|
|
* return a value extended to the register size of the host. This is
|
|
* tcg_target_long, except in the case of a 32-bit host and 64-bit
|
|
* data, and for that we always have uint64_t.
|
|
*
|
|
* We don't bother with this widened value for SOFTMMU_CODE_ACCESS.
|
|
*/
|
|
|
|
/**
|
|
* do_ld_mmio_beN:
|
|
* @env: cpu context
|
|
* @full: page parameters
|
|
* @ret_be: accumulated data
|
|
* @addr: virtual address
|
|
* @size: number of bytes
|
|
* @mmu_idx: virtual address context
|
|
* @ra: return address into tcg generated code, or 0
|
|
* Context: iothread lock held
|
|
*
|
|
* Load @size bytes from @addr, which is memory-mapped i/o.
|
|
* The bytes are concatenated in big-endian order with @ret_be.
|
|
*/
|
|
static uint64_t do_ld_mmio_beN(CPUArchState *env, CPUTLBEntryFull *full,
|
|
uint64_t ret_be, vaddr addr, int size,
|
|
int mmu_idx, MMUAccessType type, uintptr_t ra)
|
|
{
|
|
uint64_t t;
|
|
|
|
tcg_debug_assert(size > 0 && size <= 8);
|
|
do {
|
|
/* Read aligned pieces up to 8 bytes. */
|
|
switch ((size | (int)addr) & 7) {
|
|
case 1:
|
|
case 3:
|
|
case 5:
|
|
case 7:
|
|
t = io_readx(env, full, mmu_idx, addr, ra, type, MO_UB);
|
|
ret_be = (ret_be << 8) | t;
|
|
size -= 1;
|
|
addr += 1;
|
|
break;
|
|
case 2:
|
|
case 6:
|
|
t = io_readx(env, full, mmu_idx, addr, ra, type, MO_BEUW);
|
|
ret_be = (ret_be << 16) | t;
|
|
size -= 2;
|
|
addr += 2;
|
|
break;
|
|
case 4:
|
|
t = io_readx(env, full, mmu_idx, addr, ra, type, MO_BEUL);
|
|
ret_be = (ret_be << 32) | t;
|
|
size -= 4;
|
|
addr += 4;
|
|
break;
|
|
case 0:
|
|
return io_readx(env, full, mmu_idx, addr, ra, type, MO_BEUQ);
|
|
default:
|
|
qemu_build_not_reached();
|
|
}
|
|
} while (size);
|
|
return ret_be;
|
|
}
|
|
|
|
/**
|
|
* do_ld_bytes_beN
|
|
* @p: translation parameters
|
|
* @ret_be: accumulated data
|
|
*
|
|
* Load @p->size bytes from @p->haddr, which is RAM.
|
|
* The bytes to concatenated in big-endian order with @ret_be.
|
|
*/
|
|
static uint64_t do_ld_bytes_beN(MMULookupPageData *p, uint64_t ret_be)
|
|
{
|
|
uint8_t *haddr = p->haddr;
|
|
int i, size = p->size;
|
|
|
|
for (i = 0; i < size; i++) {
|
|
ret_be = (ret_be << 8) | haddr[i];
|
|
}
|
|
return ret_be;
|
|
}
|
|
|
|
/**
|
|
* do_ld_parts_beN
|
|
* @p: translation parameters
|
|
* @ret_be: accumulated data
|
|
*
|
|
* As do_ld_bytes_beN, but atomically on each aligned part.
|
|
*/
|
|
static uint64_t do_ld_parts_beN(MMULookupPageData *p, uint64_t ret_be)
|
|
{
|
|
void *haddr = p->haddr;
|
|
int size = p->size;
|
|
|
|
do {
|
|
uint64_t x;
|
|
int n;
|
|
|
|
/*
|
|
* Find minimum of alignment and size.
|
|
* This is slightly stronger than required by MO_ATOM_SUBALIGN, which
|
|
* would have only checked the low bits of addr|size once at the start,
|
|
* but is just as easy.
|
|
*/
|
|
switch (((uintptr_t)haddr | size) & 7) {
|
|
case 4:
|
|
x = cpu_to_be32(load_atomic4(haddr));
|
|
ret_be = (ret_be << 32) | x;
|
|
n = 4;
|
|
break;
|
|
case 2:
|
|
case 6:
|
|
x = cpu_to_be16(load_atomic2(haddr));
|
|
ret_be = (ret_be << 16) | x;
|
|
n = 2;
|
|
break;
|
|
default:
|
|
x = *(uint8_t *)haddr;
|
|
ret_be = (ret_be << 8) | x;
|
|
n = 1;
|
|
break;
|
|
case 0:
|
|
g_assert_not_reached();
|
|
}
|
|
haddr += n;
|
|
size -= n;
|
|
} while (size != 0);
|
|
return ret_be;
|
|
}
|
|
|
|
/**
|
|
* do_ld_parts_be4
|
|
* @p: translation parameters
|
|
* @ret_be: accumulated data
|
|
*
|
|
* As do_ld_bytes_beN, but with one atomic load.
|
|
* Four aligned bytes are guaranteed to cover the load.
|
|
*/
|
|
static uint64_t do_ld_whole_be4(MMULookupPageData *p, uint64_t ret_be)
|
|
{
|
|
int o = p->addr & 3;
|
|
uint32_t x = load_atomic4(p->haddr - o);
|
|
|
|
x = cpu_to_be32(x);
|
|
x <<= o * 8;
|
|
x >>= (4 - p->size) * 8;
|
|
return (ret_be << (p->size * 8)) | x;
|
|
}
|
|
|
|
/**
|
|
* do_ld_parts_be8
|
|
* @p: translation parameters
|
|
* @ret_be: accumulated data
|
|
*
|
|
* As do_ld_bytes_beN, but with one atomic load.
|
|
* Eight aligned bytes are guaranteed to cover the load.
|
|
*/
|
|
static uint64_t do_ld_whole_be8(CPUArchState *env, uintptr_t ra,
|
|
MMULookupPageData *p, uint64_t ret_be)
|
|
{
|
|
int o = p->addr & 7;
|
|
uint64_t x = load_atomic8_or_exit(env, ra, p->haddr - o);
|
|
|
|
x = cpu_to_be64(x);
|
|
x <<= o * 8;
|
|
x >>= (8 - p->size) * 8;
|
|
return (ret_be << (p->size * 8)) | x;
|
|
}
|
|
|
|
/**
|
|
* do_ld_parts_be16
|
|
* @p: translation parameters
|
|
* @ret_be: accumulated data
|
|
*
|
|
* As do_ld_bytes_beN, but with one atomic load.
|
|
* 16 aligned bytes are guaranteed to cover the load.
|
|
*/
|
|
static Int128 do_ld_whole_be16(CPUArchState *env, uintptr_t ra,
|
|
MMULookupPageData *p, uint64_t ret_be)
|
|
{
|
|
int o = p->addr & 15;
|
|
Int128 x, y = load_atomic16_or_exit(env, ra, p->haddr - o);
|
|
int size = p->size;
|
|
|
|
if (!HOST_BIG_ENDIAN) {
|
|
y = bswap128(y);
|
|
}
|
|
y = int128_lshift(y, o * 8);
|
|
y = int128_urshift(y, (16 - size) * 8);
|
|
x = int128_make64(ret_be);
|
|
x = int128_lshift(x, size * 8);
|
|
return int128_or(x, y);
|
|
}
|
|
|
|
/*
|
|
* Wrapper for the above.
|
|
*/
|
|
static uint64_t do_ld_beN(CPUArchState *env, MMULookupPageData *p,
|
|
uint64_t ret_be, int mmu_idx, MMUAccessType type,
|
|
MemOp mop, uintptr_t ra)
|
|
{
|
|
MemOp atom;
|
|
unsigned tmp, half_size;
|
|
|
|
if (unlikely(p->flags & TLB_MMIO)) {
|
|
QEMU_IOTHREAD_LOCK_GUARD();
|
|
return do_ld_mmio_beN(env, p->full, ret_be, p->addr, p->size,
|
|
mmu_idx, type, ra);
|
|
}
|
|
|
|
/*
|
|
* It is a given that we cross a page and therefore there is no
|
|
* atomicity for the load as a whole, but subobjects may need attention.
|
|
*/
|
|
atom = mop & MO_ATOM_MASK;
|
|
switch (atom) {
|
|
case MO_ATOM_SUBALIGN:
|
|
return do_ld_parts_beN(p, ret_be);
|
|
|
|
case MO_ATOM_IFALIGN_PAIR:
|
|
case MO_ATOM_WITHIN16_PAIR:
|
|
tmp = mop & MO_SIZE;
|
|
tmp = tmp ? tmp - 1 : 0;
|
|
half_size = 1 << tmp;
|
|
if (atom == MO_ATOM_IFALIGN_PAIR
|
|
? p->size == half_size
|
|
: p->size >= half_size) {
|
|
if (!HAVE_al8_fast && p->size < 4) {
|
|
return do_ld_whole_be4(p, ret_be);
|
|
} else {
|
|
return do_ld_whole_be8(env, ra, p, ret_be);
|
|
}
|
|
}
|
|
/* fall through */
|
|
|
|
case MO_ATOM_IFALIGN:
|
|
case MO_ATOM_WITHIN16:
|
|
case MO_ATOM_NONE:
|
|
return do_ld_bytes_beN(p, ret_be);
|
|
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Wrapper for the above, for 8 < size < 16.
|
|
*/
|
|
static Int128 do_ld16_beN(CPUArchState *env, MMULookupPageData *p,
|
|
uint64_t a, int mmu_idx, MemOp mop, uintptr_t ra)
|
|
{
|
|
int size = p->size;
|
|
uint64_t b;
|
|
MemOp atom;
|
|
|
|
if (unlikely(p->flags & TLB_MMIO)) {
|
|
QEMU_IOTHREAD_LOCK_GUARD();
|
|
a = do_ld_mmio_beN(env, p->full, a, p->addr, size - 8,
|
|
mmu_idx, MMU_DATA_LOAD, ra);
|
|
b = do_ld_mmio_beN(env, p->full, 0, p->addr + 8, 8,
|
|
mmu_idx, MMU_DATA_LOAD, ra);
|
|
return int128_make128(b, a);
|
|
}
|
|
|
|
/*
|
|
* It is a given that we cross a page and therefore there is no
|
|
* atomicity for the load as a whole, but subobjects may need attention.
|
|
*/
|
|
atom = mop & MO_ATOM_MASK;
|
|
switch (atom) {
|
|
case MO_ATOM_SUBALIGN:
|
|
p->size = size - 8;
|
|
a = do_ld_parts_beN(p, a);
|
|
p->haddr += size - 8;
|
|
p->size = 8;
|
|
b = do_ld_parts_beN(p, 0);
|
|
break;
|
|
|
|
case MO_ATOM_WITHIN16_PAIR:
|
|
/* Since size > 8, this is the half that must be atomic. */
|
|
return do_ld_whole_be16(env, ra, p, a);
|
|
|
|
case MO_ATOM_IFALIGN_PAIR:
|
|
/*
|
|
* Since size > 8, both halves are misaligned,
|
|
* and so neither is atomic.
|
|
*/
|
|
case MO_ATOM_IFALIGN:
|
|
case MO_ATOM_WITHIN16:
|
|
case MO_ATOM_NONE:
|
|
p->size = size - 8;
|
|
a = do_ld_bytes_beN(p, a);
|
|
b = ldq_be_p(p->haddr + size - 8);
|
|
break;
|
|
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
|
|
return int128_make128(b, a);
|
|
}
|
|
|
|
static uint8_t do_ld_1(CPUArchState *env, MMULookupPageData *p, int mmu_idx,
|
|
MMUAccessType type, uintptr_t ra)
|
|
{
|
|
if (unlikely(p->flags & TLB_MMIO)) {
|
|
return io_readx(env, p->full, mmu_idx, p->addr, ra, type, MO_UB);
|
|
} else {
|
|
return *(uint8_t *)p->haddr;
|
|
}
|
|
}
|
|
|
|
static uint16_t do_ld_2(CPUArchState *env, MMULookupPageData *p, int mmu_idx,
|
|
MMUAccessType type, MemOp memop, uintptr_t ra)
|
|
{
|
|
uint16_t ret;
|
|
|
|
if (unlikely(p->flags & TLB_MMIO)) {
|
|
QEMU_IOTHREAD_LOCK_GUARD();
|
|
ret = do_ld_mmio_beN(env, p->full, 0, p->addr, 2, mmu_idx, type, ra);
|
|
if ((memop & MO_BSWAP) == MO_LE) {
|
|
ret = bswap16(ret);
|
|
}
|
|
} else {
|
|
/* Perform the load host endian, then swap if necessary. */
|
|
ret = load_atom_2(env, ra, p->haddr, memop);
|
|
if (memop & MO_BSWAP) {
|
|
ret = bswap16(ret);
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static uint32_t do_ld_4(CPUArchState *env, MMULookupPageData *p, int mmu_idx,
|
|
MMUAccessType type, MemOp memop, uintptr_t ra)
|
|
{
|
|
uint32_t ret;
|
|
|
|
if (unlikely(p->flags & TLB_MMIO)) {
|
|
QEMU_IOTHREAD_LOCK_GUARD();
|
|
ret = do_ld_mmio_beN(env, p->full, 0, p->addr, 4, mmu_idx, type, ra);
|
|
if ((memop & MO_BSWAP) == MO_LE) {
|
|
ret = bswap32(ret);
|
|
}
|
|
} else {
|
|
/* Perform the load host endian. */
|
|
ret = load_atom_4(env, ra, p->haddr, memop);
|
|
if (memop & MO_BSWAP) {
|
|
ret = bswap32(ret);
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static uint64_t do_ld_8(CPUArchState *env, MMULookupPageData *p, int mmu_idx,
|
|
MMUAccessType type, MemOp memop, uintptr_t ra)
|
|
{
|
|
uint64_t ret;
|
|
|
|
if (unlikely(p->flags & TLB_MMIO)) {
|
|
QEMU_IOTHREAD_LOCK_GUARD();
|
|
ret = do_ld_mmio_beN(env, p->full, 0, p->addr, 8, mmu_idx, type, ra);
|
|
if ((memop & MO_BSWAP) == MO_LE) {
|
|
ret = bswap64(ret);
|
|
}
|
|
} else {
|
|
/* Perform the load host endian. */
|
|
ret = load_atom_8(env, ra, p->haddr, memop);
|
|
if (memop & MO_BSWAP) {
|
|
ret = bswap64(ret);
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static uint8_t do_ld1_mmu(CPUArchState *env, vaddr addr, MemOpIdx oi,
|
|
uintptr_t ra, MMUAccessType access_type)
|
|
{
|
|
MMULookupLocals l;
|
|
bool crosspage;
|
|
|
|
cpu_req_mo(TCG_MO_LD_LD | TCG_MO_ST_LD);
|
|
crosspage = mmu_lookup(env, addr, oi, ra, access_type, &l);
|
|
tcg_debug_assert(!crosspage);
|
|
|
|
return do_ld_1(env, &l.page[0], l.mmu_idx, access_type, ra);
|
|
}
|
|
|
|
tcg_target_ulong helper_ldub_mmu(CPUArchState *env, uint64_t addr,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_8);
|
|
return do_ld1_mmu(env, addr, oi, retaddr, MMU_DATA_LOAD);
|
|
}
|
|
|
|
static uint16_t do_ld2_mmu(CPUArchState *env, vaddr addr, MemOpIdx oi,
|
|
uintptr_t ra, MMUAccessType access_type)
|
|
{
|
|
MMULookupLocals l;
|
|
bool crosspage;
|
|
uint16_t ret;
|
|
uint8_t a, b;
|
|
|
|
cpu_req_mo(TCG_MO_LD_LD | TCG_MO_ST_LD);
|
|
crosspage = mmu_lookup(env, addr, oi, ra, access_type, &l);
|
|
if (likely(!crosspage)) {
|
|
return do_ld_2(env, &l.page[0], l.mmu_idx, access_type, l.memop, ra);
|
|
}
|
|
|
|
a = do_ld_1(env, &l.page[0], l.mmu_idx, access_type, ra);
|
|
b = do_ld_1(env, &l.page[1], l.mmu_idx, access_type, ra);
|
|
|
|
if ((l.memop & MO_BSWAP) == MO_LE) {
|
|
ret = a | (b << 8);
|
|
} else {
|
|
ret = b | (a << 8);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
tcg_target_ulong helper_lduw_mmu(CPUArchState *env, uint64_t addr,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_16);
|
|
return do_ld2_mmu(env, addr, oi, retaddr, MMU_DATA_LOAD);
|
|
}
|
|
|
|
static uint32_t do_ld4_mmu(CPUArchState *env, vaddr addr, MemOpIdx oi,
|
|
uintptr_t ra, MMUAccessType access_type)
|
|
{
|
|
MMULookupLocals l;
|
|
bool crosspage;
|
|
uint32_t ret;
|
|
|
|
cpu_req_mo(TCG_MO_LD_LD | TCG_MO_ST_LD);
|
|
crosspage = mmu_lookup(env, addr, oi, ra, access_type, &l);
|
|
if (likely(!crosspage)) {
|
|
return do_ld_4(env, &l.page[0], l.mmu_idx, access_type, l.memop, ra);
|
|
}
|
|
|
|
ret = do_ld_beN(env, &l.page[0], 0, l.mmu_idx, access_type, l.memop, ra);
|
|
ret = do_ld_beN(env, &l.page[1], ret, l.mmu_idx, access_type, l.memop, ra);
|
|
if ((l.memop & MO_BSWAP) == MO_LE) {
|
|
ret = bswap32(ret);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
tcg_target_ulong helper_ldul_mmu(CPUArchState *env, uint64_t addr,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_32);
|
|
return do_ld4_mmu(env, addr, oi, retaddr, MMU_DATA_LOAD);
|
|
}
|
|
|
|
static uint64_t do_ld8_mmu(CPUArchState *env, vaddr addr, MemOpIdx oi,
|
|
uintptr_t ra, MMUAccessType access_type)
|
|
{
|
|
MMULookupLocals l;
|
|
bool crosspage;
|
|
uint64_t ret;
|
|
|
|
cpu_req_mo(TCG_MO_LD_LD | TCG_MO_ST_LD);
|
|
crosspage = mmu_lookup(env, addr, oi, ra, access_type, &l);
|
|
if (likely(!crosspage)) {
|
|
return do_ld_8(env, &l.page[0], l.mmu_idx, access_type, l.memop, ra);
|
|
}
|
|
|
|
ret = do_ld_beN(env, &l.page[0], 0, l.mmu_idx, access_type, l.memop, ra);
|
|
ret = do_ld_beN(env, &l.page[1], ret, l.mmu_idx, access_type, l.memop, ra);
|
|
if ((l.memop & MO_BSWAP) == MO_LE) {
|
|
ret = bswap64(ret);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
uint64_t helper_ldq_mmu(CPUArchState *env, uint64_t addr,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_64);
|
|
return do_ld8_mmu(env, addr, oi, retaddr, MMU_DATA_LOAD);
|
|
}
|
|
|
|
/*
|
|
* Provide signed versions of the load routines as well. We can of course
|
|
* avoid this for 64-bit data, or for 32-bit data on 32-bit host.
|
|
*/
|
|
|
|
tcg_target_ulong helper_ldsb_mmu(CPUArchState *env, uint64_t addr,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
return (int8_t)helper_ldub_mmu(env, addr, oi, retaddr);
|
|
}
|
|
|
|
tcg_target_ulong helper_ldsw_mmu(CPUArchState *env, uint64_t addr,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
return (int16_t)helper_lduw_mmu(env, addr, oi, retaddr);
|
|
}
|
|
|
|
tcg_target_ulong helper_ldsl_mmu(CPUArchState *env, uint64_t addr,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
return (int32_t)helper_ldul_mmu(env, addr, oi, retaddr);
|
|
}
|
|
|
|
static Int128 do_ld16_mmu(CPUArchState *env, vaddr addr,
|
|
MemOpIdx oi, uintptr_t ra)
|
|
{
|
|
MMULookupLocals l;
|
|
bool crosspage;
|
|
uint64_t a, b;
|
|
Int128 ret;
|
|
int first;
|
|
|
|
cpu_req_mo(TCG_MO_LD_LD | TCG_MO_ST_LD);
|
|
crosspage = mmu_lookup(env, addr, oi, ra, MMU_DATA_LOAD, &l);
|
|
if (likely(!crosspage)) {
|
|
if (unlikely(l.page[0].flags & TLB_MMIO)) {
|
|
QEMU_IOTHREAD_LOCK_GUARD();
|
|
a = do_ld_mmio_beN(env, l.page[0].full, 0, addr, 8,
|
|
l.mmu_idx, MMU_DATA_LOAD, ra);
|
|
b = do_ld_mmio_beN(env, l.page[0].full, 0, addr + 8, 8,
|
|
l.mmu_idx, MMU_DATA_LOAD, ra);
|
|
ret = int128_make128(b, a);
|
|
if ((l.memop & MO_BSWAP) == MO_LE) {
|
|
ret = bswap128(ret);
|
|
}
|
|
} else {
|
|
/* Perform the load host endian. */
|
|
ret = load_atom_16(env, ra, l.page[0].haddr, l.memop);
|
|
if (l.memop & MO_BSWAP) {
|
|
ret = bswap128(ret);
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
first = l.page[0].size;
|
|
if (first == 8) {
|
|
MemOp mop8 = (l.memop & ~MO_SIZE) | MO_64;
|
|
|
|
a = do_ld_8(env, &l.page[0], l.mmu_idx, MMU_DATA_LOAD, mop8, ra);
|
|
b = do_ld_8(env, &l.page[1], l.mmu_idx, MMU_DATA_LOAD, mop8, ra);
|
|
if ((mop8 & MO_BSWAP) == MO_LE) {
|
|
ret = int128_make128(a, b);
|
|
} else {
|
|
ret = int128_make128(b, a);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
if (first < 8) {
|
|
a = do_ld_beN(env, &l.page[0], 0, l.mmu_idx,
|
|
MMU_DATA_LOAD, l.memop, ra);
|
|
ret = do_ld16_beN(env, &l.page[1], a, l.mmu_idx, l.memop, ra);
|
|
} else {
|
|
ret = do_ld16_beN(env, &l.page[0], 0, l.mmu_idx, l.memop, ra);
|
|
b = int128_getlo(ret);
|
|
ret = int128_lshift(ret, l.page[1].size * 8);
|
|
a = int128_gethi(ret);
|
|
b = do_ld_beN(env, &l.page[1], b, l.mmu_idx,
|
|
MMU_DATA_LOAD, l.memop, ra);
|
|
ret = int128_make128(b, a);
|
|
}
|
|
if ((l.memop & MO_BSWAP) == MO_LE) {
|
|
ret = bswap128(ret);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
Int128 helper_ld16_mmu(CPUArchState *env, uint64_t addr,
|
|
uint32_t oi, uintptr_t retaddr)
|
|
{
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_128);
|
|
return do_ld16_mmu(env, addr, oi, retaddr);
|
|
}
|
|
|
|
Int128 helper_ld_i128(CPUArchState *env, uint64_t addr, uint32_t oi)
|
|
{
|
|
return helper_ld16_mmu(env, addr, oi, GETPC());
|
|
}
|
|
|
|
/*
|
|
* Load helpers for cpu_ldst.h.
|
|
*/
|
|
|
|
static void plugin_load_cb(CPUArchState *env, abi_ptr addr, MemOpIdx oi)
|
|
{
|
|
qemu_plugin_vcpu_mem_cb(env_cpu(env), addr, oi, QEMU_PLUGIN_MEM_R);
|
|
}
|
|
|
|
uint8_t cpu_ldb_mmu(CPUArchState *env, abi_ptr addr, MemOpIdx oi, uintptr_t ra)
|
|
{
|
|
uint8_t ret;
|
|
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_UB);
|
|
ret = do_ld1_mmu(env, addr, oi, ra, MMU_DATA_LOAD);
|
|
plugin_load_cb(env, addr, oi);
|
|
return ret;
|
|
}
|
|
|
|
uint16_t cpu_ldw_mmu(CPUArchState *env, abi_ptr addr,
|
|
MemOpIdx oi, uintptr_t ra)
|
|
{
|
|
uint16_t ret;
|
|
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_16);
|
|
ret = do_ld2_mmu(env, addr, oi, ra, MMU_DATA_LOAD);
|
|
plugin_load_cb(env, addr, oi);
|
|
return ret;
|
|
}
|
|
|
|
uint32_t cpu_ldl_mmu(CPUArchState *env, abi_ptr addr,
|
|
MemOpIdx oi, uintptr_t ra)
|
|
{
|
|
uint32_t ret;
|
|
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_32);
|
|
ret = do_ld4_mmu(env, addr, oi, ra, MMU_DATA_LOAD);
|
|
plugin_load_cb(env, addr, oi);
|
|
return ret;
|
|
}
|
|
|
|
uint64_t cpu_ldq_mmu(CPUArchState *env, abi_ptr addr,
|
|
MemOpIdx oi, uintptr_t ra)
|
|
{
|
|
uint64_t ret;
|
|
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_64);
|
|
ret = do_ld8_mmu(env, addr, oi, ra, MMU_DATA_LOAD);
|
|
plugin_load_cb(env, addr, oi);
|
|
return ret;
|
|
}
|
|
|
|
Int128 cpu_ld16_mmu(CPUArchState *env, abi_ptr addr,
|
|
MemOpIdx oi, uintptr_t ra)
|
|
{
|
|
Int128 ret;
|
|
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_128);
|
|
ret = do_ld16_mmu(env, addr, oi, ra);
|
|
plugin_load_cb(env, addr, oi);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Store Helpers
|
|
*/
|
|
|
|
/**
|
|
* do_st_mmio_leN:
|
|
* @env: cpu context
|
|
* @full: page parameters
|
|
* @val_le: data to store
|
|
* @addr: virtual address
|
|
* @size: number of bytes
|
|
* @mmu_idx: virtual address context
|
|
* @ra: return address into tcg generated code, or 0
|
|
* Context: iothread lock held
|
|
*
|
|
* Store @size bytes at @addr, which is memory-mapped i/o.
|
|
* The bytes to store are extracted in little-endian order from @val_le;
|
|
* return the bytes of @val_le beyond @p->size that have not been stored.
|
|
*/
|
|
static uint64_t do_st_mmio_leN(CPUArchState *env, CPUTLBEntryFull *full,
|
|
uint64_t val_le, vaddr addr, int size,
|
|
int mmu_idx, uintptr_t ra)
|
|
{
|
|
tcg_debug_assert(size > 0 && size <= 8);
|
|
|
|
do {
|
|
/* Store aligned pieces up to 8 bytes. */
|
|
switch ((size | (int)addr) & 7) {
|
|
case 1:
|
|
case 3:
|
|
case 5:
|
|
case 7:
|
|
io_writex(env, full, mmu_idx, val_le, addr, ra, MO_UB);
|
|
val_le >>= 8;
|
|
size -= 1;
|
|
addr += 1;
|
|
break;
|
|
case 2:
|
|
case 6:
|
|
io_writex(env, full, mmu_idx, val_le, addr, ra, MO_LEUW);
|
|
val_le >>= 16;
|
|
size -= 2;
|
|
addr += 2;
|
|
break;
|
|
case 4:
|
|
io_writex(env, full, mmu_idx, val_le, addr, ra, MO_LEUL);
|
|
val_le >>= 32;
|
|
size -= 4;
|
|
addr += 4;
|
|
break;
|
|
case 0:
|
|
io_writex(env, full, mmu_idx, val_le, addr, ra, MO_LEUQ);
|
|
return 0;
|
|
default:
|
|
qemu_build_not_reached();
|
|
}
|
|
} while (size);
|
|
|
|
return val_le;
|
|
}
|
|
|
|
/*
|
|
* Wrapper for the above.
|
|
*/
|
|
static uint64_t do_st_leN(CPUArchState *env, MMULookupPageData *p,
|
|
uint64_t val_le, int mmu_idx,
|
|
MemOp mop, uintptr_t ra)
|
|
{
|
|
MemOp atom;
|
|
unsigned tmp, half_size;
|
|
|
|
if (unlikely(p->flags & TLB_MMIO)) {
|
|
QEMU_IOTHREAD_LOCK_GUARD();
|
|
return do_st_mmio_leN(env, p->full, val_le, p->addr,
|
|
p->size, mmu_idx, ra);
|
|
} else if (unlikely(p->flags & TLB_DISCARD_WRITE)) {
|
|
return val_le >> (p->size * 8);
|
|
}
|
|
|
|
/*
|
|
* It is a given that we cross a page and therefore there is no atomicity
|
|
* for the store as a whole, but subobjects may need attention.
|
|
*/
|
|
atom = mop & MO_ATOM_MASK;
|
|
switch (atom) {
|
|
case MO_ATOM_SUBALIGN:
|
|
return store_parts_leN(p->haddr, p->size, val_le);
|
|
|
|
case MO_ATOM_IFALIGN_PAIR:
|
|
case MO_ATOM_WITHIN16_PAIR:
|
|
tmp = mop & MO_SIZE;
|
|
tmp = tmp ? tmp - 1 : 0;
|
|
half_size = 1 << tmp;
|
|
if (atom == MO_ATOM_IFALIGN_PAIR
|
|
? p->size == half_size
|
|
: p->size >= half_size) {
|
|
if (!HAVE_al8_fast && p->size <= 4) {
|
|
return store_whole_le4(p->haddr, p->size, val_le);
|
|
} else if (HAVE_al8) {
|
|
return store_whole_le8(p->haddr, p->size, val_le);
|
|
} else {
|
|
cpu_loop_exit_atomic(env_cpu(env), ra);
|
|
}
|
|
}
|
|
/* fall through */
|
|
|
|
case MO_ATOM_IFALIGN:
|
|
case MO_ATOM_WITHIN16:
|
|
case MO_ATOM_NONE:
|
|
return store_bytes_leN(p->haddr, p->size, val_le);
|
|
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Wrapper for the above, for 8 < size < 16.
|
|
*/
|
|
static uint64_t do_st16_leN(CPUArchState *env, MMULookupPageData *p,
|
|
Int128 val_le, int mmu_idx,
|
|
MemOp mop, uintptr_t ra)
|
|
{
|
|
int size = p->size;
|
|
MemOp atom;
|
|
|
|
if (unlikely(p->flags & TLB_MMIO)) {
|
|
QEMU_IOTHREAD_LOCK_GUARD();
|
|
do_st_mmio_leN(env, p->full, int128_getlo(val_le),
|
|
p->addr, 8, mmu_idx, ra);
|
|
return do_st_mmio_leN(env, p->full, int128_gethi(val_le),
|
|
p->addr + 8, size - 8, mmu_idx, ra);
|
|
} else if (unlikely(p->flags & TLB_DISCARD_WRITE)) {
|
|
return int128_gethi(val_le) >> ((size - 8) * 8);
|
|
}
|
|
|
|
/*
|
|
* It is a given that we cross a page and therefore there is no atomicity
|
|
* for the store as a whole, but subobjects may need attention.
|
|
*/
|
|
atom = mop & MO_ATOM_MASK;
|
|
switch (atom) {
|
|
case MO_ATOM_SUBALIGN:
|
|
store_parts_leN(p->haddr, 8, int128_getlo(val_le));
|
|
return store_parts_leN(p->haddr + 8, p->size - 8,
|
|
int128_gethi(val_le));
|
|
|
|
case MO_ATOM_WITHIN16_PAIR:
|
|
/* Since size > 8, this is the half that must be atomic. */
|
|
if (!HAVE_ATOMIC128_RW) {
|
|
cpu_loop_exit_atomic(env_cpu(env), ra);
|
|
}
|
|
return store_whole_le16(p->haddr, p->size, val_le);
|
|
|
|
case MO_ATOM_IFALIGN_PAIR:
|
|
/*
|
|
* Since size > 8, both halves are misaligned,
|
|
* and so neither is atomic.
|
|
*/
|
|
case MO_ATOM_IFALIGN:
|
|
case MO_ATOM_WITHIN16:
|
|
case MO_ATOM_NONE:
|
|
stq_le_p(p->haddr, int128_getlo(val_le));
|
|
return store_bytes_leN(p->haddr + 8, p->size - 8,
|
|
int128_gethi(val_le));
|
|
|
|
default:
|
|
g_assert_not_reached();
|
|
}
|
|
}
|
|
|
|
static void do_st_1(CPUArchState *env, MMULookupPageData *p, uint8_t val,
|
|
int mmu_idx, uintptr_t ra)
|
|
{
|
|
if (unlikely(p->flags & TLB_MMIO)) {
|
|
io_writex(env, p->full, mmu_idx, val, p->addr, ra, MO_UB);
|
|
} else if (unlikely(p->flags & TLB_DISCARD_WRITE)) {
|
|
/* nothing */
|
|
} else {
|
|
*(uint8_t *)p->haddr = val;
|
|
}
|
|
}
|
|
|
|
static void do_st_2(CPUArchState *env, MMULookupPageData *p, uint16_t val,
|
|
int mmu_idx, MemOp memop, uintptr_t ra)
|
|
{
|
|
if (unlikely(p->flags & TLB_MMIO)) {
|
|
if ((memop & MO_BSWAP) != MO_LE) {
|
|
val = bswap16(val);
|
|
}
|
|
QEMU_IOTHREAD_LOCK_GUARD();
|
|
do_st_mmio_leN(env, p->full, val, p->addr, 2, mmu_idx, ra);
|
|
} else if (unlikely(p->flags & TLB_DISCARD_WRITE)) {
|
|
/* nothing */
|
|
} else {
|
|
/* Swap to host endian if necessary, then store. */
|
|
if (memop & MO_BSWAP) {
|
|
val = bswap16(val);
|
|
}
|
|
store_atom_2(env, ra, p->haddr, memop, val);
|
|
}
|
|
}
|
|
|
|
static void do_st_4(CPUArchState *env, MMULookupPageData *p, uint32_t val,
|
|
int mmu_idx, MemOp memop, uintptr_t ra)
|
|
{
|
|
if (unlikely(p->flags & TLB_MMIO)) {
|
|
if ((memop & MO_BSWAP) != MO_LE) {
|
|
val = bswap32(val);
|
|
}
|
|
QEMU_IOTHREAD_LOCK_GUARD();
|
|
do_st_mmio_leN(env, p->full, val, p->addr, 4, mmu_idx, ra);
|
|
} else if (unlikely(p->flags & TLB_DISCARD_WRITE)) {
|
|
/* nothing */
|
|
} else {
|
|
/* Swap to host endian if necessary, then store. */
|
|
if (memop & MO_BSWAP) {
|
|
val = bswap32(val);
|
|
}
|
|
store_atom_4(env, ra, p->haddr, memop, val);
|
|
}
|
|
}
|
|
|
|
static void do_st_8(CPUArchState *env, MMULookupPageData *p, uint64_t val,
|
|
int mmu_idx, MemOp memop, uintptr_t ra)
|
|
{
|
|
if (unlikely(p->flags & TLB_MMIO)) {
|
|
if ((memop & MO_BSWAP) != MO_LE) {
|
|
val = bswap64(val);
|
|
}
|
|
QEMU_IOTHREAD_LOCK_GUARD();
|
|
do_st_mmio_leN(env, p->full, val, p->addr, 8, mmu_idx, ra);
|
|
} else if (unlikely(p->flags & TLB_DISCARD_WRITE)) {
|
|
/* nothing */
|
|
} else {
|
|
/* Swap to host endian if necessary, then store. */
|
|
if (memop & MO_BSWAP) {
|
|
val = bswap64(val);
|
|
}
|
|
store_atom_8(env, ra, p->haddr, memop, val);
|
|
}
|
|
}
|
|
|
|
void helper_stb_mmu(CPUArchState *env, uint64_t addr, uint32_t val,
|
|
MemOpIdx oi, uintptr_t ra)
|
|
{
|
|
MMULookupLocals l;
|
|
bool crosspage;
|
|
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_8);
|
|
cpu_req_mo(TCG_MO_LD_ST | TCG_MO_ST_ST);
|
|
crosspage = mmu_lookup(env, addr, oi, ra, MMU_DATA_STORE, &l);
|
|
tcg_debug_assert(!crosspage);
|
|
|
|
do_st_1(env, &l.page[0], val, l.mmu_idx, ra);
|
|
}
|
|
|
|
static void do_st2_mmu(CPUArchState *env, vaddr addr, uint16_t val,
|
|
MemOpIdx oi, uintptr_t ra)
|
|
{
|
|
MMULookupLocals l;
|
|
bool crosspage;
|
|
uint8_t a, b;
|
|
|
|
cpu_req_mo(TCG_MO_LD_ST | TCG_MO_ST_ST);
|
|
crosspage = mmu_lookup(env, addr, oi, ra, MMU_DATA_STORE, &l);
|
|
if (likely(!crosspage)) {
|
|
do_st_2(env, &l.page[0], val, l.mmu_idx, l.memop, ra);
|
|
return;
|
|
}
|
|
|
|
if ((l.memop & MO_BSWAP) == MO_LE) {
|
|
a = val, b = val >> 8;
|
|
} else {
|
|
b = val, a = val >> 8;
|
|
}
|
|
do_st_1(env, &l.page[0], a, l.mmu_idx, ra);
|
|
do_st_1(env, &l.page[1], b, l.mmu_idx, ra);
|
|
}
|
|
|
|
void helper_stw_mmu(CPUArchState *env, uint64_t addr, uint32_t val,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_16);
|
|
do_st2_mmu(env, addr, val, oi, retaddr);
|
|
}
|
|
|
|
static void do_st4_mmu(CPUArchState *env, vaddr addr, uint32_t val,
|
|
MemOpIdx oi, uintptr_t ra)
|
|
{
|
|
MMULookupLocals l;
|
|
bool crosspage;
|
|
|
|
cpu_req_mo(TCG_MO_LD_ST | TCG_MO_ST_ST);
|
|
crosspage = mmu_lookup(env, addr, oi, ra, MMU_DATA_STORE, &l);
|
|
if (likely(!crosspage)) {
|
|
do_st_4(env, &l.page[0], val, l.mmu_idx, l.memop, ra);
|
|
return;
|
|
}
|
|
|
|
/* Swap to little endian for simplicity, then store by bytes. */
|
|
if ((l.memop & MO_BSWAP) != MO_LE) {
|
|
val = bswap32(val);
|
|
}
|
|
val = do_st_leN(env, &l.page[0], val, l.mmu_idx, l.memop, ra);
|
|
(void) do_st_leN(env, &l.page[1], val, l.mmu_idx, l.memop, ra);
|
|
}
|
|
|
|
void helper_stl_mmu(CPUArchState *env, uint64_t addr, uint32_t val,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_32);
|
|
do_st4_mmu(env, addr, val, oi, retaddr);
|
|
}
|
|
|
|
static void do_st8_mmu(CPUArchState *env, vaddr addr, uint64_t val,
|
|
MemOpIdx oi, uintptr_t ra)
|
|
{
|
|
MMULookupLocals l;
|
|
bool crosspage;
|
|
|
|
cpu_req_mo(TCG_MO_LD_ST | TCG_MO_ST_ST);
|
|
crosspage = mmu_lookup(env, addr, oi, ra, MMU_DATA_STORE, &l);
|
|
if (likely(!crosspage)) {
|
|
do_st_8(env, &l.page[0], val, l.mmu_idx, l.memop, ra);
|
|
return;
|
|
}
|
|
|
|
/* Swap to little endian for simplicity, then store by bytes. */
|
|
if ((l.memop & MO_BSWAP) != MO_LE) {
|
|
val = bswap64(val);
|
|
}
|
|
val = do_st_leN(env, &l.page[0], val, l.mmu_idx, l.memop, ra);
|
|
(void) do_st_leN(env, &l.page[1], val, l.mmu_idx, l.memop, ra);
|
|
}
|
|
|
|
void helper_stq_mmu(CPUArchState *env, uint64_t addr, uint64_t val,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_64);
|
|
do_st8_mmu(env, addr, val, oi, retaddr);
|
|
}
|
|
|
|
static void do_st16_mmu(CPUArchState *env, vaddr addr, Int128 val,
|
|
MemOpIdx oi, uintptr_t ra)
|
|
{
|
|
MMULookupLocals l;
|
|
bool crosspage;
|
|
uint64_t a, b;
|
|
int first;
|
|
|
|
cpu_req_mo(TCG_MO_LD_ST | TCG_MO_ST_ST);
|
|
crosspage = mmu_lookup(env, addr, oi, ra, MMU_DATA_STORE, &l);
|
|
if (likely(!crosspage)) {
|
|
if (unlikely(l.page[0].flags & TLB_MMIO)) {
|
|
if ((l.memop & MO_BSWAP) != MO_LE) {
|
|
val = bswap128(val);
|
|
}
|
|
a = int128_getlo(val);
|
|
b = int128_gethi(val);
|
|
QEMU_IOTHREAD_LOCK_GUARD();
|
|
do_st_mmio_leN(env, l.page[0].full, a, addr, 8, l.mmu_idx, ra);
|
|
do_st_mmio_leN(env, l.page[0].full, b, addr + 8, 8, l.mmu_idx, ra);
|
|
} else if (unlikely(l.page[0].flags & TLB_DISCARD_WRITE)) {
|
|
/* nothing */
|
|
} else {
|
|
/* Swap to host endian if necessary, then store. */
|
|
if (l.memop & MO_BSWAP) {
|
|
val = bswap128(val);
|
|
}
|
|
store_atom_16(env, ra, l.page[0].haddr, l.memop, val);
|
|
}
|
|
return;
|
|
}
|
|
|
|
first = l.page[0].size;
|
|
if (first == 8) {
|
|
MemOp mop8 = (l.memop & ~(MO_SIZE | MO_BSWAP)) | MO_64;
|
|
|
|
if (l.memop & MO_BSWAP) {
|
|
val = bswap128(val);
|
|
}
|
|
if (HOST_BIG_ENDIAN) {
|
|
b = int128_getlo(val), a = int128_gethi(val);
|
|
} else {
|
|
a = int128_getlo(val), b = int128_gethi(val);
|
|
}
|
|
do_st_8(env, &l.page[0], a, l.mmu_idx, mop8, ra);
|
|
do_st_8(env, &l.page[1], b, l.mmu_idx, mop8, ra);
|
|
return;
|
|
}
|
|
|
|
if ((l.memop & MO_BSWAP) != MO_LE) {
|
|
val = bswap128(val);
|
|
}
|
|
if (first < 8) {
|
|
do_st_leN(env, &l.page[0], int128_getlo(val), l.mmu_idx, l.memop, ra);
|
|
val = int128_urshift(val, first * 8);
|
|
do_st16_leN(env, &l.page[1], val, l.mmu_idx, l.memop, ra);
|
|
} else {
|
|
b = do_st16_leN(env, &l.page[0], val, l.mmu_idx, l.memop, ra);
|
|
do_st_leN(env, &l.page[1], b, l.mmu_idx, l.memop, ra);
|
|
}
|
|
}
|
|
|
|
void helper_st16_mmu(CPUArchState *env, uint64_t addr, Int128 val,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_128);
|
|
do_st16_mmu(env, addr, val, oi, retaddr);
|
|
}
|
|
|
|
void helper_st_i128(CPUArchState *env, uint64_t addr, Int128 val, MemOpIdx oi)
|
|
{
|
|
helper_st16_mmu(env, addr, val, oi, GETPC());
|
|
}
|
|
|
|
/*
|
|
* Store Helpers for cpu_ldst.h
|
|
*/
|
|
|
|
static void plugin_store_cb(CPUArchState *env, abi_ptr addr, MemOpIdx oi)
|
|
{
|
|
qemu_plugin_vcpu_mem_cb(env_cpu(env), addr, oi, QEMU_PLUGIN_MEM_W);
|
|
}
|
|
|
|
void cpu_stb_mmu(CPUArchState *env, target_ulong addr, uint8_t val,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
helper_stb_mmu(env, addr, val, oi, retaddr);
|
|
plugin_store_cb(env, addr, oi);
|
|
}
|
|
|
|
void cpu_stw_mmu(CPUArchState *env, target_ulong addr, uint16_t val,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_16);
|
|
do_st2_mmu(env, addr, val, oi, retaddr);
|
|
plugin_store_cb(env, addr, oi);
|
|
}
|
|
|
|
void cpu_stl_mmu(CPUArchState *env, target_ulong addr, uint32_t val,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_32);
|
|
do_st4_mmu(env, addr, val, oi, retaddr);
|
|
plugin_store_cb(env, addr, oi);
|
|
}
|
|
|
|
void cpu_stq_mmu(CPUArchState *env, target_ulong addr, uint64_t val,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_64);
|
|
do_st8_mmu(env, addr, val, oi, retaddr);
|
|
plugin_store_cb(env, addr, oi);
|
|
}
|
|
|
|
void cpu_st16_mmu(CPUArchState *env, target_ulong addr, Int128 val,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
tcg_debug_assert((get_memop(oi) & MO_SIZE) == MO_128);
|
|
do_st16_mmu(env, addr, val, oi, retaddr);
|
|
plugin_store_cb(env, addr, oi);
|
|
}
|
|
|
|
#include "ldst_common.c.inc"
|
|
|
|
/*
|
|
* First set of functions passes in OI and RETADDR.
|
|
* This makes them callable from other helpers.
|
|
*/
|
|
|
|
#define ATOMIC_NAME(X) \
|
|
glue(glue(glue(cpu_atomic_ ## X, SUFFIX), END), _mmu)
|
|
|
|
#define ATOMIC_MMU_CLEANUP
|
|
|
|
#include "atomic_common.c.inc"
|
|
|
|
#define DATA_SIZE 1
|
|
#include "atomic_template.h"
|
|
|
|
#define DATA_SIZE 2
|
|
#include "atomic_template.h"
|
|
|
|
#define DATA_SIZE 4
|
|
#include "atomic_template.h"
|
|
|
|
#ifdef CONFIG_ATOMIC64
|
|
#define DATA_SIZE 8
|
|
#include "atomic_template.h"
|
|
#endif
|
|
|
|
#if defined(CONFIG_ATOMIC128) || HAVE_CMPXCHG128
|
|
#define DATA_SIZE 16
|
|
#include "atomic_template.h"
|
|
#endif
|
|
|
|
/* Code access functions. */
|
|
|
|
uint32_t cpu_ldub_code(CPUArchState *env, abi_ptr addr)
|
|
{
|
|
MemOpIdx oi = make_memop_idx(MO_UB, cpu_mmu_index(env, true));
|
|
return do_ld1_mmu(env, addr, oi, 0, MMU_INST_FETCH);
|
|
}
|
|
|
|
uint32_t cpu_lduw_code(CPUArchState *env, abi_ptr addr)
|
|
{
|
|
MemOpIdx oi = make_memop_idx(MO_TEUW, cpu_mmu_index(env, true));
|
|
return do_ld2_mmu(env, addr, oi, 0, MMU_INST_FETCH);
|
|
}
|
|
|
|
uint32_t cpu_ldl_code(CPUArchState *env, abi_ptr addr)
|
|
{
|
|
MemOpIdx oi = make_memop_idx(MO_TEUL, cpu_mmu_index(env, true));
|
|
return do_ld4_mmu(env, addr, oi, 0, MMU_INST_FETCH);
|
|
}
|
|
|
|
uint64_t cpu_ldq_code(CPUArchState *env, abi_ptr addr)
|
|
{
|
|
MemOpIdx oi = make_memop_idx(MO_TEUQ, cpu_mmu_index(env, true));
|
|
return do_ld8_mmu(env, addr, oi, 0, MMU_INST_FETCH);
|
|
}
|
|
|
|
uint8_t cpu_ldb_code_mmu(CPUArchState *env, abi_ptr addr,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
return do_ld1_mmu(env, addr, oi, retaddr, MMU_INST_FETCH);
|
|
}
|
|
|
|
uint16_t cpu_ldw_code_mmu(CPUArchState *env, abi_ptr addr,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
return do_ld2_mmu(env, addr, oi, retaddr, MMU_INST_FETCH);
|
|
}
|
|
|
|
uint32_t cpu_ldl_code_mmu(CPUArchState *env, abi_ptr addr,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
return do_ld4_mmu(env, addr, oi, retaddr, MMU_INST_FETCH);
|
|
}
|
|
|
|
uint64_t cpu_ldq_code_mmu(CPUArchState *env, abi_ptr addr,
|
|
MemOpIdx oi, uintptr_t retaddr)
|
|
{
|
|
return do_ld8_mmu(env, addr, oi, retaddr, MMU_INST_FETCH);
|
|
}
|