2005-02-22 22:27:29 +03:00
|
|
|
/*
|
|
|
|
* ARM helper routines
|
2007-09-17 01:08:06 +04:00
|
|
|
*
|
2007-11-11 03:04:49 +03:00
|
|
|
* Copyright (c) 2005-2007 CodeSourcery, LLC
|
2005-02-22 22:27:29 +03:00
|
|
|
*
|
|
|
|
* This library is free software; you can redistribute it and/or
|
|
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
|
|
* License as published by the Free Software Foundation; either
|
2020-10-23 15:29:13 +03:00
|
|
|
* version 2.1 of the License, or (at your option) any later version.
|
2005-02-22 22:27:29 +03:00
|
|
|
*
|
|
|
|
* This library is distributed in the hope that it will be useful,
|
|
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
|
* Lesser General Public License for more details.
|
|
|
|
*
|
|
|
|
* You should have received a copy of the GNU Lesser General Public
|
2009-07-17 00:47:01 +04:00
|
|
|
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
|
2005-02-22 22:27:29 +03:00
|
|
|
*/
|
2015-12-07 19:23:44 +03:00
|
|
|
#include "qemu/osdep.h"
|
tcg: drop global lock during TCG code execution
This finally allows TCG to benefit from the iothread introduction: Drop
the global mutex while running pure TCG CPU code. Reacquire the lock
when entering MMIO or PIO emulation, or when leaving the TCG loop.
We have to revert a few optimization for the current TCG threading
model, namely kicking the TCG thread in qemu_mutex_lock_iothread and not
kicking it in qemu_cpu_kick. We also need to disable RAM block
reordering until we have a more efficient locking mechanism at hand.
Still, a Linux x86 UP guest and my Musicpal ARM model boot fine here.
These numbers demonstrate where we gain something:
20338 jan 20 0 331m 75m 6904 R 99 0.9 0:50.95 qemu-system-arm
20337 jan 20 0 331m 75m 6904 S 20 0.9 0:26.50 qemu-system-arm
The guest CPU was fully loaded, but the iothread could still run mostly
independent on a second core. Without the patch we don't get beyond
32206 jan 20 0 330m 73m 7036 R 82 0.9 1:06.00 qemu-system-arm
32204 jan 20 0 330m 73m 7036 S 21 0.9 0:17.03 qemu-system-arm
We don't benefit significantly, though, when the guest is not fully
loading a host CPU.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-Id: <1439220437-23957-10-git-send-email-fred.konrad@greensocs.com>
[FK: Rebase, fix qemu_devices_reset deadlock, rm address_space_* mutex]
Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
[EGC: fixed iothread lock for cpu-exec IRQ handling]
Signed-off-by: Emilio G. Cota <cota@braap.org>
[AJB: -smp single-threaded fix, clean commit msg, BQL fixes]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
[PM: target-arm changes]
Acked-by: Peter Maydell <peter.maydell@linaro.org>
2017-02-23 21:29:11 +03:00
|
|
|
#include "qemu/main-loop.h"
|
2011-07-13 16:44:15 +04:00
|
|
|
#include "cpu.h"
|
2014-04-08 09:31:41 +04:00
|
|
|
#include "exec/helper-proto.h"
|
2014-04-15 22:18:37 +04:00
|
|
|
#include "internals.h"
|
2016-03-15 15:18:37 +03:00
|
|
|
#include "exec/exec-all.h"
|
2014-03-28 22:42:10 +04:00
|
|
|
#include "exec/cpu_ldst.h"
|
2022-05-01 08:49:43 +03:00
|
|
|
#include "cpregs.h"
|
2005-02-22 22:27:29 +03:00
|
|
|
|
2008-03-31 07:48:30 +04:00
|
|
|
#define SIGNBIT (uint32_t)0x80000000
|
|
|
|
#define SIGNBIT64 ((uint64_t)1 << 63)
|
|
|
|
|
2022-06-10 16:32:30 +03:00
|
|
|
int exception_target_el(CPUARMState *env)
|
|
|
|
{
|
|
|
|
int target_el = MAX(1, arm_current_el(env));
|
|
|
|
|
|
|
|
/*
|
|
|
|
* No such thing as secure EL1 if EL3 is aarch32,
|
|
|
|
* so update the target EL to EL3 in this case.
|
|
|
|
*/
|
|
|
|
if (arm_is_secure(env) && !arm_el_is_aa64(env, 3) && target_el == 1) {
|
|
|
|
target_el = 3;
|
|
|
|
}
|
|
|
|
|
|
|
|
return target_el;
|
|
|
|
}
|
|
|
|
|
2021-05-26 15:18:45 +03:00
|
|
|
void raise_exception(CPUARMState *env, uint32_t excp,
|
|
|
|
uint32_t syndrome, uint32_t target_el)
|
2005-02-22 22:27:29 +03:00
|
|
|
{
|
2019-03-23 03:41:14 +03:00
|
|
|
CPUState *cs = env_cpu(env);
|
2013-08-26 10:31:06 +04:00
|
|
|
|
2018-12-13 16:48:08 +03:00
|
|
|
if (target_el == 1 && (arm_hcr_el2_eff(env) & HCR_TGE)) {
|
2018-08-14 19:17:21 +03:00
|
|
|
/*
|
|
|
|
* Redirect NS EL1 exceptions to NS EL2. These are reported with
|
|
|
|
* their original syndrome register value, with the exception of
|
|
|
|
* SIMD/FP access traps, which are reported as uncategorized
|
|
|
|
* (see DDI0478C.a D1.10.4)
|
|
|
|
*/
|
|
|
|
target_el = 2;
|
2018-10-24 09:50:18 +03:00
|
|
|
if (syn_get_ec(syndrome) == EC_ADVSIMDFPACCESSTRAP) {
|
2018-08-14 19:17:21 +03:00
|
|
|
syndrome = syn_uncategorized();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-05-29 13:28:51 +03:00
|
|
|
assert(!excp_is_internal(excp));
|
|
|
|
cs->exception_index = excp;
|
|
|
|
env->exception.syndrome = syndrome;
|
|
|
|
env->exception.target_el = target_el;
|
2013-08-27 19:52:12 +04:00
|
|
|
cpu_loop_exit(cs);
|
2005-02-22 22:27:29 +03:00
|
|
|
}
|
|
|
|
|
2019-01-21 13:23:11 +03:00
|
|
|
void raise_exception_ra(CPUARMState *env, uint32_t excp, uint32_t syndrome,
|
|
|
|
uint32_t target_el, uintptr_t ra)
|
|
|
|
{
|
2021-05-26 15:18:44 +03:00
|
|
|
CPUState *cs = env_cpu(env);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* restore_state_to_opc() will set env->exception.syndrome, so
|
|
|
|
* we must restore CPU state here before setting the syndrome
|
|
|
|
* the caller passed us, and cannot use cpu_loop_exit_restore().
|
|
|
|
*/
|
|
|
|
cpu_restore_state(cs, ra, true);
|
|
|
|
raise_exception(env, excp, syndrome, target_el);
|
2019-01-21 13:23:11 +03:00
|
|
|
}
|
|
|
|
|
2020-11-05 20:11:26 +03:00
|
|
|
uint64_t HELPER(neon_tbl)(CPUARMState *env, uint32_t desc,
|
|
|
|
uint64_t ireg, uint64_t def)
|
2007-11-11 03:04:49 +03:00
|
|
|
{
|
2020-11-05 20:11:26 +03:00
|
|
|
uint64_t tmp, val = 0;
|
|
|
|
uint32_t maxindex = ((desc & 3) + 1) * 8;
|
|
|
|
uint32_t base_reg = desc >> 2;
|
|
|
|
uint32_t shift, index, reg;
|
2018-01-25 14:45:28 +03:00
|
|
|
|
2020-11-05 20:11:26 +03:00
|
|
|
for (shift = 0; shift < 64; shift += 8) {
|
|
|
|
index = (ireg >> shift) & 0xff;
|
2008-03-31 07:48:01 +04:00
|
|
|
if (index < maxindex) {
|
2020-11-05 20:11:26 +03:00
|
|
|
reg = base_reg + (index >> 3);
|
|
|
|
tmp = *aa32_vfp_dreg(env, reg);
|
|
|
|
tmp = ((tmp >> ((index & 7) << 3)) & 0xff) << shift;
|
2007-11-11 03:04:49 +03:00
|
|
|
} else {
|
2020-11-05 20:11:26 +03:00
|
|
|
tmp = def & (0xffull << shift);
|
2007-11-11 03:04:49 +03:00
|
|
|
}
|
2020-11-05 20:11:26 +03:00
|
|
|
val |= tmp;
|
2007-11-11 03:04:49 +03:00
|
|
|
}
|
2008-03-31 07:48:01 +04:00
|
|
|
return val;
|
2007-11-11 03:04:49 +03:00
|
|
|
}
|
|
|
|
|
2018-10-08 16:55:04 +03:00
|
|
|
void HELPER(v8m_stackcheck)(CPUARMState *env, uint32_t newvalue)
|
|
|
|
{
|
|
|
|
/*
|
|
|
|
* Perform the v8M stack limit check for SP updates from translated code,
|
|
|
|
* raising an exception if the limit is breached.
|
|
|
|
*/
|
|
|
|
if (newvalue < v7m_sp_limit(env)) {
|
|
|
|
/*
|
|
|
|
* Stack limit exceptions are a rare case, so rather than syncing
|
2021-05-26 15:18:47 +03:00
|
|
|
* PC/condbits before the call, we use raise_exception_ra() so
|
|
|
|
* that cpu_restore_state() will sort them out.
|
2018-10-08 16:55:04 +03:00
|
|
|
*/
|
2021-05-26 15:18:47 +03:00
|
|
|
raise_exception_ra(env, EXCP_STKOF, 0, 1, GETPC());
|
2018-10-08 16:55:04 +03:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-09-05 00:19:15 +04:00
|
|
|
uint32_t HELPER(add_setq)(CPUARMState *env, uint32_t a, uint32_t b)
|
2008-03-31 07:45:50 +04:00
|
|
|
{
|
|
|
|
uint32_t res = a + b;
|
|
|
|
if (((res ^ a) & SIGNBIT) && !((a ^ b) & SIGNBIT))
|
|
|
|
env->QF = 1;
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
2012-09-05 00:19:15 +04:00
|
|
|
uint32_t HELPER(add_saturate)(CPUARMState *env, uint32_t a, uint32_t b)
|
2008-03-31 07:45:50 +04:00
|
|
|
{
|
|
|
|
uint32_t res = a + b;
|
|
|
|
if (((res ^ a) & SIGNBIT) && !((a ^ b) & SIGNBIT)) {
|
|
|
|
env->QF = 1;
|
|
|
|
res = ~(((int32_t)a >> 31) ^ SIGNBIT);
|
|
|
|
}
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
2012-09-05 00:19:15 +04:00
|
|
|
uint32_t HELPER(sub_saturate)(CPUARMState *env, uint32_t a, uint32_t b)
|
2008-03-31 07:45:50 +04:00
|
|
|
{
|
|
|
|
uint32_t res = a - b;
|
|
|
|
if (((res ^ a) & SIGNBIT) && ((a ^ b) & SIGNBIT)) {
|
|
|
|
env->QF = 1;
|
|
|
|
res = ~(((int32_t)a >> 31) ^ SIGNBIT);
|
|
|
|
}
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
2012-09-05 00:19:15 +04:00
|
|
|
uint32_t HELPER(add_usaturate)(CPUARMState *env, uint32_t a, uint32_t b)
|
2008-03-31 07:45:50 +04:00
|
|
|
{
|
|
|
|
uint32_t res = a + b;
|
|
|
|
if (res < a) {
|
|
|
|
env->QF = 1;
|
|
|
|
res = ~0;
|
|
|
|
}
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
2012-09-05 00:19:15 +04:00
|
|
|
uint32_t HELPER(sub_usaturate)(CPUARMState *env, uint32_t a, uint32_t b)
|
2008-03-31 07:45:50 +04:00
|
|
|
{
|
|
|
|
uint32_t res = a - b;
|
|
|
|
if (res > a) {
|
|
|
|
env->QF = 1;
|
|
|
|
res = 0;
|
|
|
|
}
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
2008-03-31 07:46:33 +04:00
|
|
|
/* Signed saturation. */
|
2012-09-05 00:19:15 +04:00
|
|
|
static inline uint32_t do_ssat(CPUARMState *env, int32_t val, int shift)
|
2008-03-31 07:46:33 +04:00
|
|
|
{
|
|
|
|
int32_t top;
|
|
|
|
uint32_t mask;
|
|
|
|
|
|
|
|
top = val >> shift;
|
|
|
|
mask = (1u << shift) - 1;
|
|
|
|
if (top > 0) {
|
|
|
|
env->QF = 1;
|
|
|
|
return mask;
|
|
|
|
} else if (top < -1) {
|
|
|
|
env->QF = 1;
|
|
|
|
return ~mask;
|
|
|
|
}
|
|
|
|
return val;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Unsigned saturation. */
|
2012-09-05 00:19:15 +04:00
|
|
|
static inline uint32_t do_usat(CPUARMState *env, int32_t val, int shift)
|
2008-03-31 07:46:33 +04:00
|
|
|
{
|
|
|
|
uint32_t max;
|
|
|
|
|
|
|
|
max = (1u << shift) - 1;
|
|
|
|
if (val < 0) {
|
|
|
|
env->QF = 1;
|
|
|
|
return 0;
|
|
|
|
} else if (val > max) {
|
|
|
|
env->QF = 1;
|
|
|
|
return max;
|
|
|
|
}
|
|
|
|
return val;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Signed saturate. */
|
2012-09-05 00:19:15 +04:00
|
|
|
uint32_t HELPER(ssat)(CPUARMState *env, uint32_t x, uint32_t shift)
|
2008-03-31 07:46:33 +04:00
|
|
|
{
|
2012-09-05 00:19:15 +04:00
|
|
|
return do_ssat(env, x, shift);
|
2008-03-31 07:46:33 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Dual halfword signed saturate. */
|
2012-09-05 00:19:15 +04:00
|
|
|
uint32_t HELPER(ssat16)(CPUARMState *env, uint32_t x, uint32_t shift)
|
2008-03-31 07:46:33 +04:00
|
|
|
{
|
|
|
|
uint32_t res;
|
|
|
|
|
2012-09-05 00:19:15 +04:00
|
|
|
res = (uint16_t)do_ssat(env, (int16_t)x, shift);
|
|
|
|
res |= do_ssat(env, ((int32_t)x) >> 16, shift) << 16;
|
2008-03-31 07:46:33 +04:00
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Unsigned saturate. */
|
2012-09-05 00:19:15 +04:00
|
|
|
uint32_t HELPER(usat)(CPUARMState *env, uint32_t x, uint32_t shift)
|
2008-03-31 07:46:33 +04:00
|
|
|
{
|
2012-09-05 00:19:15 +04:00
|
|
|
return do_usat(env, x, shift);
|
2008-03-31 07:46:33 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Dual halfword unsigned saturate. */
|
2012-09-05 00:19:15 +04:00
|
|
|
uint32_t HELPER(usat16)(CPUARMState *env, uint32_t x, uint32_t shift)
|
2008-03-31 07:46:33 +04:00
|
|
|
{
|
|
|
|
uint32_t res;
|
|
|
|
|
2012-09-05 00:19:15 +04:00
|
|
|
res = (uint16_t)do_usat(env, (int16_t)x, shift);
|
|
|
|
res |= do_usat(env, ((int32_t)x) >> 16, shift) << 16;
|
2008-03-31 07:46:33 +04:00
|
|
|
return res;
|
|
|
|
}
|
2008-03-31 07:46:50 +04:00
|
|
|
|
2016-03-04 14:30:21 +03:00
|
|
|
void HELPER(setend)(CPUARMState *env)
|
|
|
|
{
|
|
|
|
env->uncached_cpsr ^= CPSR_E;
|
2019-10-23 18:00:51 +03:00
|
|
|
arm_rebuild_hflags(env);
|
2016-03-04 14:30:21 +03:00
|
|
|
}
|
|
|
|
|
2021-08-16 21:03:05 +03:00
|
|
|
void HELPER(check_bxj_trap)(CPUARMState *env, uint32_t rm)
|
|
|
|
{
|
|
|
|
/*
|
|
|
|
* Only called if in NS EL0 or EL1 for a BXJ for a v7A CPU;
|
|
|
|
* check if HSTR.TJDBX means we need to trap to EL2.
|
|
|
|
*/
|
|
|
|
if (env->cp15.hstr_el2 & HSTR_TJDBX) {
|
|
|
|
/*
|
|
|
|
* We know the condition code check passed, so take the IMPDEF
|
|
|
|
* choice to always report CV=1 COND 0xe
|
|
|
|
*/
|
|
|
|
uint32_t syn = syn_bxjtrap(1, 0xe, rm);
|
|
|
|
raise_exception_ra(env, EXCP_HYP_TRAP, syn, 2, GETPC());
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-04-30 19:22:12 +03:00
|
|
|
#ifndef CONFIG_USER_ONLY
|
2015-05-29 13:28:53 +03:00
|
|
|
/* Function checks whether WFx (WFI/WFE) instructions are set up to be trapped.
|
|
|
|
* The function returns the target EL (1-3) if the instruction is to be trapped;
|
|
|
|
* otherwise it returns 0 indicating it is not trapped.
|
|
|
|
*/
|
|
|
|
static inline int check_wfx_trap(CPUARMState *env, bool is_wfe)
|
|
|
|
{
|
|
|
|
int cur_el = arm_current_el(env);
|
|
|
|
uint64_t mask;
|
|
|
|
|
2017-09-04 17:21:51 +03:00
|
|
|
if (arm_feature(env, ARM_FEATURE_M)) {
|
|
|
|
/* M profile cores can never trap WFI/WFE. */
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2015-05-29 13:28:53 +03:00
|
|
|
/* If we are currently in EL0 then we need to check if SCTLR is set up for
|
|
|
|
* WFx instructions being trapped to EL1. These trap bits don't exist in v7.
|
|
|
|
*/
|
|
|
|
if (cur_el < 1 && arm_feature(env, ARM_FEATURE_V8)) {
|
|
|
|
int target_el;
|
|
|
|
|
|
|
|
mask = is_wfe ? SCTLR_nTWE : SCTLR_nTWI;
|
|
|
|
if (arm_is_secure_below_el3(env) && !arm_el_is_aa64(env, 3)) {
|
|
|
|
/* Secure EL0 and Secure PL1 is at EL3 */
|
|
|
|
target_el = 3;
|
|
|
|
} else {
|
|
|
|
target_el = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!(env->cp15.sctlr_el[target_el] & mask)) {
|
|
|
|
return target_el;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* We are not trapping to EL1; trap to EL2 if HCR_EL2 requires it
|
|
|
|
* No need for ARM_FEATURE check as if HCR_EL2 doesn't exist the
|
|
|
|
* bits will be zero indicating no trap.
|
|
|
|
*/
|
2018-12-13 16:48:08 +03:00
|
|
|
if (cur_el < 2) {
|
|
|
|
mask = is_wfe ? HCR_TWE : HCR_TWI;
|
|
|
|
if (arm_hcr_el2_eff(env) & mask) {
|
2015-05-29 13:28:53 +03:00
|
|
|
return 2;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* We are not trapping to EL1 or EL2; trap to EL3 if SCR_EL3 requires it */
|
|
|
|
if (cur_el < 3) {
|
|
|
|
mask = (is_wfe) ? SCR_TWE : SCR_TWI;
|
|
|
|
if (env->cp15.scr_el3 & mask) {
|
|
|
|
return 3;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
2021-04-30 19:22:12 +03:00
|
|
|
#endif
|
2015-05-29 13:28:53 +03:00
|
|
|
|
2017-10-31 14:50:50 +03:00
|
|
|
void HELPER(wfi)(CPUARMState *env, uint32_t insn_len)
|
2008-03-31 07:46:50 +04:00
|
|
|
{
|
2021-04-30 19:22:12 +03:00
|
|
|
#ifdef CONFIG_USER_ONLY
|
|
|
|
/*
|
|
|
|
* WFI in the user-mode emulator is technically permitted but not
|
|
|
|
* something any real-world code would do. AArch64 Linux kernels
|
|
|
|
* trap it via SCTRL_EL1.nTWI and make it an (expensive) NOP;
|
|
|
|
* AArch32 kernels don't trap it so it will delay a bit.
|
|
|
|
* For QEMU, make it NOP here, because trying to raise EXCP_HLT
|
|
|
|
* would trigger an abort.
|
|
|
|
*/
|
|
|
|
return;
|
|
|
|
#else
|
2019-03-23 03:41:14 +03:00
|
|
|
CPUState *cs = env_cpu(env);
|
2015-05-29 13:28:53 +03:00
|
|
|
int target_el = check_wfx_trap(env, false);
|
2013-01-17 21:51:17 +04:00
|
|
|
|
2015-05-29 13:28:53 +03:00
|
|
|
if (cpu_has_work(cs)) {
|
|
|
|
/* Don't bother to go into our "low power state" if
|
|
|
|
* we would just wake up immediately.
|
|
|
|
*/
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2015-05-29 13:28:53 +03:00
|
|
|
if (target_el) {
|
2020-01-17 17:09:31 +03:00
|
|
|
if (env->aarch64) {
|
|
|
|
env->pc -= insn_len;
|
|
|
|
} else {
|
|
|
|
env->regs[15] -= insn_len;
|
|
|
|
}
|
|
|
|
|
2017-10-31 14:50:50 +03:00
|
|
|
raise_exception(env, EXCP_UDEF, syn_wfx(1, 0xe, 0, insn_len == 2),
|
|
|
|
target_el);
|
2015-05-29 13:28:53 +03:00
|
|
|
}
|
|
|
|
|
2013-08-26 10:31:06 +04:00
|
|
|
cs->exception_index = EXCP_HLT;
|
2013-01-17 21:51:17 +04:00
|
|
|
cs->halted = 1;
|
2013-08-27 19:52:12 +04:00
|
|
|
cpu_loop_exit(cs);
|
2021-04-30 19:22:12 +03:00
|
|
|
#endif
|
2008-03-31 07:46:50 +04:00
|
|
|
}
|
|
|
|
|
2014-03-10 18:56:30 +04:00
|
|
|
void HELPER(wfe)(CPUARMState *env)
|
|
|
|
{
|
2015-07-06 12:05:44 +03:00
|
|
|
/* This is a hint instruction that is semantically different
|
|
|
|
* from YIELD even though we currently implement it identically.
|
|
|
|
* Don't actually halt the CPU, just yield back to top
|
2015-05-29 13:28:53 +03:00
|
|
|
* level loop. This is not going into a "low power state"
|
|
|
|
* (ie halting until some event occurs), so we never take
|
|
|
|
* a configurable trap to a different exception level.
|
2014-03-10 18:56:30 +04:00
|
|
|
*/
|
2015-07-06 12:05:44 +03:00
|
|
|
HELPER(yield)(env);
|
|
|
|
}
|
|
|
|
|
|
|
|
void HELPER(yield)(CPUARMState *env)
|
|
|
|
{
|
2019-03-23 03:41:14 +03:00
|
|
|
CPUState *cs = env_cpu(env);
|
2015-07-06 12:05:44 +03:00
|
|
|
|
|
|
|
/* This is a non-trappable hint instruction that generally indicates
|
|
|
|
* that the guest is currently busy-looping. Yield control back to the
|
|
|
|
* top level loop so that a more deserving VCPU has a chance to run.
|
|
|
|
*/
|
2013-08-26 10:31:06 +04:00
|
|
|
cs->exception_index = EXCP_YIELD;
|
2013-08-27 19:52:12 +04:00
|
|
|
cpu_loop_exit(cs);
|
2014-03-10 18:56:30 +04:00
|
|
|
}
|
|
|
|
|
2014-04-15 22:18:38 +04:00
|
|
|
/* Raise an internal-to-QEMU exception. This is limited to only
|
|
|
|
* those EXCP values which are special cases for QEMU to interrupt
|
|
|
|
* execution and not to be used for exceptions which are passed to
|
|
|
|
* the guest (those must all have syndrome information and thus should
|
|
|
|
* use exception_with_syndrome).
|
|
|
|
*/
|
|
|
|
void HELPER(exception_internal)(CPUARMState *env, uint32_t excp)
|
|
|
|
{
|
2019-03-23 03:41:14 +03:00
|
|
|
CPUState *cs = env_cpu(env);
|
2014-04-15 22:18:38 +04:00
|
|
|
|
|
|
|
assert(excp_is_internal(excp));
|
|
|
|
cs->exception_index = excp;
|
|
|
|
cpu_loop_exit(cs);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Raise an exception with the specified syndrome register value */
|
|
|
|
void HELPER(exception_with_syndrome)(CPUARMState *env, uint32_t excp,
|
2015-05-29 13:28:50 +03:00
|
|
|
uint32_t syndrome, uint32_t target_el)
|
2008-03-31 07:46:50 +04:00
|
|
|
{
|
2015-05-29 13:28:51 +03:00
|
|
|
raise_exception(env, excp, syndrome, target_el);
|
2008-03-31 07:46:50 +04:00
|
|
|
}
|
|
|
|
|
2018-03-23 21:26:46 +03:00
|
|
|
/* Raise an EXCP_BKPT with the specified syndrome register value,
|
|
|
|
* targeting the correct exception level for debug exceptions.
|
|
|
|
*/
|
|
|
|
void HELPER(exception_bkpt_insn)(CPUARMState *env, uint32_t syndrome)
|
|
|
|
{
|
2019-07-30 16:25:22 +03:00
|
|
|
int debug_el = arm_debug_target_el(env);
|
|
|
|
int cur_el = arm_current_el(env);
|
|
|
|
|
2018-03-23 21:26:46 +03:00
|
|
|
/* FSR will only be used if the debug target EL is AArch32. */
|
|
|
|
env->exception.fsr = arm_debug_exception_fsr(env);
|
2018-03-23 21:26:46 +03:00
|
|
|
/* FAR is UNKNOWN: clear vaddress to avoid potentially exposing
|
|
|
|
* values to the guest that it shouldn't be able to see at its
|
|
|
|
* exception/security level.
|
|
|
|
*/
|
|
|
|
env->exception.vaddress = 0;
|
2019-07-30 16:25:22 +03:00
|
|
|
/*
|
|
|
|
* Other kinds of architectural debug exception are ignored if
|
|
|
|
* they target an exception level below the current one (in QEMU
|
|
|
|
* this is checked by arm_generate_debug_exceptions()). Breakpoint
|
|
|
|
* instructions are special because they always generate an exception
|
|
|
|
* to somewhere: if they can't go to the configured debug exception
|
|
|
|
* level they are taken to the current exception level.
|
|
|
|
*/
|
|
|
|
if (debug_el < cur_el) {
|
|
|
|
debug_el = cur_el;
|
|
|
|
}
|
|
|
|
raise_exception(env, EXCP_BKPT, syndrome, debug_el);
|
2018-03-23 21:26:46 +03:00
|
|
|
}
|
|
|
|
|
2012-09-05 00:19:15 +04:00
|
|
|
uint32_t HELPER(cpsr_read)(CPUARMState *env)
|
2008-03-31 07:46:50 +04:00
|
|
|
{
|
2021-02-08 09:56:58 +03:00
|
|
|
return cpsr_read(env) & ~CPSR_EXEC;
|
2008-03-31 07:46:50 +04:00
|
|
|
}
|
|
|
|
|
2012-09-05 00:08:34 +04:00
|
|
|
void HELPER(cpsr_write)(CPUARMState *env, uint32_t val, uint32_t mask)
|
2008-03-31 07:46:50 +04:00
|
|
|
{
|
2016-02-23 18:36:43 +03:00
|
|
|
cpsr_write(env, val, mask, CPSRWriteByInstr);
|
2019-10-23 18:00:51 +03:00
|
|
|
/* TODO: Not all cpsr bits are relevant to hflags. */
|
|
|
|
arm_rebuild_hflags(env);
|
2008-03-31 07:46:50 +04:00
|
|
|
}
|
2008-03-31 07:47:03 +04:00
|
|
|
|
2016-02-23 18:36:43 +03:00
|
|
|
/* Write the CPSR for a 32-bit exception return */
|
|
|
|
void HELPER(cpsr_write_eret)(CPUARMState *env, uint32_t val)
|
|
|
|
{
|
2020-02-08 15:58:03 +03:00
|
|
|
uint32_t mask;
|
|
|
|
|
2018-04-26 13:04:39 +03:00
|
|
|
qemu_mutex_lock_iothread();
|
2019-03-23 03:41:14 +03:00
|
|
|
arm_call_pre_el_change_hook(env_archcpu(env));
|
2018-04-26 13:04:39 +03:00
|
|
|
qemu_mutex_unlock_iothread();
|
|
|
|
|
2020-02-08 15:58:03 +03:00
|
|
|
mask = aarch32_cpsr_valid_mask(env->features, &env_archcpu(env)->isar);
|
|
|
|
cpsr_write(env, val, mask, CPSRWriteExceptionReturn);
|
2016-06-17 17:23:46 +03:00
|
|
|
|
2016-10-10 18:26:03 +03:00
|
|
|
/* Generated code has already stored the new PC value, but
|
|
|
|
* without masking out its low bits, because which bits need
|
|
|
|
* masking depends on whether we're returning to Thumb or ARM
|
|
|
|
* state. Do the masking now.
|
|
|
|
*/
|
|
|
|
env->regs[15] &= (env->thumb ? ~1 : ~3);
|
2019-10-23 18:00:49 +03:00
|
|
|
arm_rebuild_hflags(env);
|
2016-10-10 18:26:03 +03:00
|
|
|
|
tcg: drop global lock during TCG code execution
This finally allows TCG to benefit from the iothread introduction: Drop
the global mutex while running pure TCG CPU code. Reacquire the lock
when entering MMIO or PIO emulation, or when leaving the TCG loop.
We have to revert a few optimization for the current TCG threading
model, namely kicking the TCG thread in qemu_mutex_lock_iothread and not
kicking it in qemu_cpu_kick. We also need to disable RAM block
reordering until we have a more efficient locking mechanism at hand.
Still, a Linux x86 UP guest and my Musicpal ARM model boot fine here.
These numbers demonstrate where we gain something:
20338 jan 20 0 331m 75m 6904 R 99 0.9 0:50.95 qemu-system-arm
20337 jan 20 0 331m 75m 6904 S 20 0.9 0:26.50 qemu-system-arm
The guest CPU was fully loaded, but the iothread could still run mostly
independent on a second core. Without the patch we don't get beyond
32206 jan 20 0 330m 73m 7036 R 82 0.9 1:06.00 qemu-system-arm
32204 jan 20 0 330m 73m 7036 S 21 0.9 0:17.03 qemu-system-arm
We don't benefit significantly, though, when the guest is not fully
loading a host CPU.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-Id: <1439220437-23957-10-git-send-email-fred.konrad@greensocs.com>
[FK: Rebase, fix qemu_devices_reset deadlock, rm address_space_* mutex]
Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
[EGC: fixed iothread lock for cpu-exec IRQ handling]
Signed-off-by: Emilio G. Cota <cota@braap.org>
[AJB: -smp single-threaded fix, clean commit msg, BQL fixes]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
[PM: target-arm changes]
Acked-by: Peter Maydell <peter.maydell@linaro.org>
2017-02-23 21:29:11 +03:00
|
|
|
qemu_mutex_lock_iothread();
|
2019-03-23 03:41:14 +03:00
|
|
|
arm_call_el_change_hook(env_archcpu(env));
|
tcg: drop global lock during TCG code execution
This finally allows TCG to benefit from the iothread introduction: Drop
the global mutex while running pure TCG CPU code. Reacquire the lock
when entering MMIO or PIO emulation, or when leaving the TCG loop.
We have to revert a few optimization for the current TCG threading
model, namely kicking the TCG thread in qemu_mutex_lock_iothread and not
kicking it in qemu_cpu_kick. We also need to disable RAM block
reordering until we have a more efficient locking mechanism at hand.
Still, a Linux x86 UP guest and my Musicpal ARM model boot fine here.
These numbers demonstrate where we gain something:
20338 jan 20 0 331m 75m 6904 R 99 0.9 0:50.95 qemu-system-arm
20337 jan 20 0 331m 75m 6904 S 20 0.9 0:26.50 qemu-system-arm
The guest CPU was fully loaded, but the iothread could still run mostly
independent on a second core. Without the patch we don't get beyond
32206 jan 20 0 330m 73m 7036 R 82 0.9 1:06.00 qemu-system-arm
32204 jan 20 0 330m 73m 7036 S 21 0.9 0:17.03 qemu-system-arm
We don't benefit significantly, though, when the guest is not fully
loading a host CPU.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-Id: <1439220437-23957-10-git-send-email-fred.konrad@greensocs.com>
[FK: Rebase, fix qemu_devices_reset deadlock, rm address_space_* mutex]
Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
[EGC: fixed iothread lock for cpu-exec IRQ handling]
Signed-off-by: Emilio G. Cota <cota@braap.org>
[AJB: -smp single-threaded fix, clean commit msg, BQL fixes]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
[PM: target-arm changes]
Acked-by: Peter Maydell <peter.maydell@linaro.org>
2017-02-23 21:29:11 +03:00
|
|
|
qemu_mutex_unlock_iothread();
|
2016-02-23 18:36:43 +03:00
|
|
|
}
|
|
|
|
|
2008-03-31 07:47:03 +04:00
|
|
|
/* Access to user mode registers from privileged modes. */
|
2012-09-05 00:19:15 +04:00
|
|
|
uint32_t HELPER(get_user_reg)(CPUARMState *env, uint32_t regno)
|
2008-03-31 07:47:03 +04:00
|
|
|
{
|
|
|
|
uint32_t val;
|
|
|
|
|
|
|
|
if (regno == 13) {
|
2015-11-03 16:49:41 +03:00
|
|
|
val = env->banked_r13[BANK_USRSYS];
|
2008-03-31 07:47:03 +04:00
|
|
|
} else if (regno == 14) {
|
2015-11-03 16:49:41 +03:00
|
|
|
val = env->banked_r14[BANK_USRSYS];
|
2008-03-31 07:47:03 +04:00
|
|
|
} else if (regno >= 8
|
|
|
|
&& (env->uncached_cpsr & 0x1f) == ARM_CPU_MODE_FIQ) {
|
|
|
|
val = env->usr_regs[regno - 8];
|
|
|
|
} else {
|
|
|
|
val = env->regs[regno];
|
|
|
|
}
|
|
|
|
return val;
|
|
|
|
}
|
|
|
|
|
2012-09-05 00:08:34 +04:00
|
|
|
void HELPER(set_user_reg)(CPUARMState *env, uint32_t regno, uint32_t val)
|
2008-03-31 07:47:03 +04:00
|
|
|
{
|
|
|
|
if (regno == 13) {
|
2015-11-03 16:49:41 +03:00
|
|
|
env->banked_r13[BANK_USRSYS] = val;
|
2008-03-31 07:47:03 +04:00
|
|
|
} else if (regno == 14) {
|
2015-11-03 16:49:41 +03:00
|
|
|
env->banked_r14[BANK_USRSYS] = val;
|
2008-03-31 07:47:03 +04:00
|
|
|
} else if (regno >= 8
|
|
|
|
&& (env->uncached_cpsr & 0x1f) == ARM_CPU_MODE_FIQ) {
|
|
|
|
env->usr_regs[regno - 8] = val;
|
|
|
|
} else {
|
|
|
|
env->regs[regno] = val;
|
|
|
|
}
|
|
|
|
}
|
2012-06-20 15:57:06 +04:00
|
|
|
|
2016-02-18 17:16:16 +03:00
|
|
|
void HELPER(set_r13_banked)(CPUARMState *env, uint32_t mode, uint32_t val)
|
|
|
|
{
|
|
|
|
if ((env->uncached_cpsr & CPSR_M) == mode) {
|
|
|
|
env->regs[13] = val;
|
|
|
|
} else {
|
|
|
|
env->banked_r13[bank_number(mode)] = val;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
uint32_t HELPER(get_r13_banked)(CPUARMState *env, uint32_t mode)
|
|
|
|
{
|
2016-02-18 17:16:17 +03:00
|
|
|
if ((env->uncached_cpsr & CPSR_M) == ARM_CPU_MODE_SYS) {
|
|
|
|
/* SRS instruction is UNPREDICTABLE from System mode; we UNDEF.
|
|
|
|
* Other UNPREDICTABLE and UNDEF cases were caught at translate time.
|
|
|
|
*/
|
|
|
|
raise_exception(env, EXCP_UDEF, syn_uncategorized(),
|
|
|
|
exception_target_el(env));
|
|
|
|
}
|
|
|
|
|
2016-02-18 17:16:16 +03:00
|
|
|
if ((env->uncached_cpsr & CPSR_M) == mode) {
|
|
|
|
return env->regs[13];
|
|
|
|
} else {
|
|
|
|
return env->banked_r13[bank_number(mode)];
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2016-03-16 20:05:58 +03:00
|
|
|
static void msr_mrs_banked_exc_checks(CPUARMState *env, uint32_t tgtmode,
|
|
|
|
uint32_t regno)
|
|
|
|
{
|
|
|
|
/* Raise an exception if the requested access is one of the UNPREDICTABLE
|
|
|
|
* cases; otherwise return. This broadly corresponds to the pseudocode
|
|
|
|
* BankedRegisterAccessValid() and SPSRAccessValid(),
|
|
|
|
* except that we have already handled some cases at translate time.
|
|
|
|
*/
|
|
|
|
int curmode = env->uncached_cpsr & CPSR_M;
|
|
|
|
|
2018-08-20 13:24:32 +03:00
|
|
|
if (regno == 17) {
|
|
|
|
/* ELR_Hyp: a special case because access from tgtmode is OK */
|
|
|
|
if (curmode != ARM_CPU_MODE_HYP && curmode != ARM_CPU_MODE_MON) {
|
|
|
|
goto undef;
|
|
|
|
}
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2016-03-16 20:05:58 +03:00
|
|
|
if (curmode == tgtmode) {
|
|
|
|
goto undef;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (tgtmode == ARM_CPU_MODE_USR) {
|
|
|
|
switch (regno) {
|
|
|
|
case 8 ... 12:
|
|
|
|
if (curmode != ARM_CPU_MODE_FIQ) {
|
|
|
|
goto undef;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case 13:
|
|
|
|
if (curmode == ARM_CPU_MODE_SYS) {
|
|
|
|
goto undef;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
case 14:
|
|
|
|
if (curmode == ARM_CPU_MODE_HYP || curmode == ARM_CPU_MODE_SYS) {
|
|
|
|
goto undef;
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (tgtmode == ARM_CPU_MODE_HYP) {
|
2018-08-20 13:24:32 +03:00
|
|
|
/* SPSR_Hyp, r13_hyp: accessible from Monitor mode only */
|
|
|
|
if (curmode != ARM_CPU_MODE_MON) {
|
|
|
|
goto undef;
|
2016-03-16 20:05:58 +03:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
undef:
|
|
|
|
raise_exception(env, EXCP_UDEF, syn_uncategorized(),
|
|
|
|
exception_target_el(env));
|
|
|
|
}
|
|
|
|
|
|
|
|
void HELPER(msr_banked)(CPUARMState *env, uint32_t value, uint32_t tgtmode,
|
|
|
|
uint32_t regno)
|
|
|
|
{
|
|
|
|
msr_mrs_banked_exc_checks(env, tgtmode, regno);
|
|
|
|
|
|
|
|
switch (regno) {
|
|
|
|
case 16: /* SPSRs */
|
|
|
|
env->banked_spsr[bank_number(tgtmode)] = value;
|
|
|
|
break;
|
|
|
|
case 17: /* ELR_Hyp */
|
|
|
|
env->elr_el[2] = value;
|
|
|
|
break;
|
|
|
|
case 13:
|
|
|
|
env->banked_r13[bank_number(tgtmode)] = value;
|
|
|
|
break;
|
|
|
|
case 14:
|
2018-11-13 13:47:59 +03:00
|
|
|
env->banked_r14[r14_bank_number(tgtmode)] = value;
|
2016-03-16 20:05:58 +03:00
|
|
|
break;
|
|
|
|
case 8 ... 12:
|
|
|
|
switch (tgtmode) {
|
|
|
|
case ARM_CPU_MODE_USR:
|
|
|
|
env->usr_regs[regno - 8] = value;
|
|
|
|
break;
|
|
|
|
case ARM_CPU_MODE_FIQ:
|
|
|
|
env->fiq_regs[regno - 8] = value;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
g_assert_not_reached();
|
|
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
g_assert_not_reached();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
uint32_t HELPER(mrs_banked)(CPUARMState *env, uint32_t tgtmode, uint32_t regno)
|
|
|
|
{
|
|
|
|
msr_mrs_banked_exc_checks(env, tgtmode, regno);
|
|
|
|
|
|
|
|
switch (regno) {
|
|
|
|
case 16: /* SPSRs */
|
|
|
|
return env->banked_spsr[bank_number(tgtmode)];
|
|
|
|
case 17: /* ELR_Hyp */
|
|
|
|
return env->elr_el[2];
|
|
|
|
case 13:
|
|
|
|
return env->banked_r13[bank_number(tgtmode)];
|
|
|
|
case 14:
|
2018-11-13 13:47:59 +03:00
|
|
|
return env->banked_r14[r14_bank_number(tgtmode)];
|
2016-03-16 20:05:58 +03:00
|
|
|
case 8 ... 12:
|
|
|
|
switch (tgtmode) {
|
|
|
|
case ARM_CPU_MODE_USR:
|
|
|
|
return env->usr_regs[regno - 8];
|
|
|
|
case ARM_CPU_MODE_FIQ:
|
|
|
|
return env->fiq_regs[regno - 8];
|
|
|
|
default:
|
|
|
|
g_assert_not_reached();
|
|
|
|
}
|
|
|
|
default:
|
|
|
|
g_assert_not_reached();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2016-02-11 14:17:31 +03:00
|
|
|
void HELPER(access_check_cp_reg)(CPUARMState *env, void *rip, uint32_t syndrome,
|
|
|
|
uint32_t isread)
|
2014-02-20 14:35:52 +04:00
|
|
|
{
|
2022-05-09 18:54:57 +03:00
|
|
|
ARMCPU *cpu = env_archcpu(env);
|
2014-02-20 14:35:52 +04:00
|
|
|
const ARMCPRegInfo *ri = rip;
|
2022-05-01 08:49:44 +03:00
|
|
|
CPAccessResult res = CP_ACCESS_OK;
|
2015-05-29 13:28:52 +03:00
|
|
|
int target_el;
|
2014-09-29 21:48:48 +04:00
|
|
|
|
|
|
|
if (arm_feature(env, ARM_FEATURE_XSCALE) && ri->cp < 14
|
|
|
|
&& extract32(env->cp15.c15_cpar, ri->cp, 1) == 0) {
|
2022-05-01 08:49:44 +03:00
|
|
|
res = CP_ACCESS_TRAP;
|
|
|
|
goto fail;
|
2014-09-29 21:48:48 +04:00
|
|
|
}
|
|
|
|
|
2019-12-01 15:20:17 +03:00
|
|
|
/*
|
|
|
|
* Check for an EL2 trap due to HSTR_EL2. We expect EL0 accesses
|
|
|
|
* to sysregs non accessible at EL0 to have UNDEF-ed already.
|
|
|
|
*/
|
|
|
|
if (!is_a64(env) && arm_current_el(env) < 2 && ri->cp == 15 &&
|
|
|
|
(arm_hcr_el2_eff(env) & (HCR_E2H | HCR_TGE)) != (HCR_E2H | HCR_TGE)) {
|
|
|
|
uint32_t mask = 1 << ri->crn;
|
|
|
|
|
|
|
|
if (ri->type & ARM_CP_64BIT) {
|
|
|
|
mask = 1 << ri->crm;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* T4 and T14 are RES0 */
|
|
|
|
mask &= ~((1 << 4) | (1 << 14));
|
|
|
|
|
|
|
|
if (env->cp15.hstr_el2 & mask) {
|
2022-05-01 08:49:44 +03:00
|
|
|
res = CP_ACCESS_TRAP_EL2;
|
|
|
|
goto fail;
|
2019-12-01 15:20:17 +03:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2022-05-01 08:49:44 +03:00
|
|
|
if (ri->accessfn) {
|
|
|
|
res = ri->accessfn(env, ri, isread);
|
|
|
|
}
|
|
|
|
if (likely(res == CP_ACCESS_OK)) {
|
2014-09-29 21:48:48 +04:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2022-05-01 08:49:44 +03:00
|
|
|
fail:
|
|
|
|
switch (res & ~CP_ACCESS_EL_MASK) {
|
2014-02-20 14:35:52 +04:00
|
|
|
case CP_ACCESS_TRAP:
|
2014-04-15 22:18:38 +04:00
|
|
|
break;
|
2014-02-20 14:35:52 +04:00
|
|
|
case CP_ACCESS_TRAP_UNCATEGORIZED:
|
2022-05-09 18:54:57 +03:00
|
|
|
if (cpu_isar_feature(aa64_ids, cpu) && isread &&
|
|
|
|
arm_cpreg_in_idspace(ri)) {
|
|
|
|
/*
|
|
|
|
* FEAT_IDST says this should be reported as EC_SYSTEMREGISTERTRAP,
|
|
|
|
* not EC_UNCATEGORIZED
|
|
|
|
*/
|
|
|
|
break;
|
|
|
|
}
|
2015-05-29 13:28:51 +03:00
|
|
|
syndrome = syn_uncategorized();
|
2014-02-20 14:35:52 +04:00
|
|
|
break;
|
2022-05-01 08:49:44 +03:00
|
|
|
default:
|
|
|
|
g_assert_not_reached();
|
|
|
|
}
|
|
|
|
|
|
|
|
target_el = res & CP_ACCESS_EL_MASK;
|
|
|
|
switch (target_el) {
|
|
|
|
case 0:
|
|
|
|
target_el = exception_target_el(env);
|
2015-08-25 17:45:08 +03:00
|
|
|
break;
|
2022-05-01 08:49:44 +03:00
|
|
|
case 2:
|
|
|
|
assert(arm_current_el(env) != 3);
|
|
|
|
assert(arm_is_el2_enabled(env));
|
|
|
|
break;
|
|
|
|
case 3:
|
|
|
|
assert(arm_feature(env, ARM_FEATURE_EL3));
|
2015-08-25 17:45:08 +03:00
|
|
|
break;
|
2014-02-20 14:35:52 +04:00
|
|
|
default:
|
2022-05-01 08:49:44 +03:00
|
|
|
/* No "direct" traps to EL1 */
|
2014-02-20 14:35:52 +04:00
|
|
|
g_assert_not_reached();
|
|
|
|
}
|
2015-05-29 13:28:51 +03:00
|
|
|
|
2015-05-29 13:28:52 +03:00
|
|
|
raise_exception(env, EXCP_UDEF, syndrome, target_el);
|
2014-02-20 14:35:52 +04:00
|
|
|
}
|
|
|
|
|
2012-06-20 15:57:06 +04:00
|
|
|
void HELPER(set_cp_reg)(CPUARMState *env, void *rip, uint32_t value)
|
|
|
|
{
|
|
|
|
const ARMCPRegInfo *ri = rip;
|
2014-02-20 14:35:54 +04:00
|
|
|
|
tcg: drop global lock during TCG code execution
This finally allows TCG to benefit from the iothread introduction: Drop
the global mutex while running pure TCG CPU code. Reacquire the lock
when entering MMIO or PIO emulation, or when leaving the TCG loop.
We have to revert a few optimization for the current TCG threading
model, namely kicking the TCG thread in qemu_mutex_lock_iothread and not
kicking it in qemu_cpu_kick. We also need to disable RAM block
reordering until we have a more efficient locking mechanism at hand.
Still, a Linux x86 UP guest and my Musicpal ARM model boot fine here.
These numbers demonstrate where we gain something:
20338 jan 20 0 331m 75m 6904 R 99 0.9 0:50.95 qemu-system-arm
20337 jan 20 0 331m 75m 6904 S 20 0.9 0:26.50 qemu-system-arm
The guest CPU was fully loaded, but the iothread could still run mostly
independent on a second core. Without the patch we don't get beyond
32206 jan 20 0 330m 73m 7036 R 82 0.9 1:06.00 qemu-system-arm
32204 jan 20 0 330m 73m 7036 S 21 0.9 0:17.03 qemu-system-arm
We don't benefit significantly, though, when the guest is not fully
loading a host CPU.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-Id: <1439220437-23957-10-git-send-email-fred.konrad@greensocs.com>
[FK: Rebase, fix qemu_devices_reset deadlock, rm address_space_* mutex]
Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
[EGC: fixed iothread lock for cpu-exec IRQ handling]
Signed-off-by: Emilio G. Cota <cota@braap.org>
[AJB: -smp single-threaded fix, clean commit msg, BQL fixes]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
[PM: target-arm changes]
Acked-by: Peter Maydell <peter.maydell@linaro.org>
2017-02-23 21:29:11 +03:00
|
|
|
if (ri->type & ARM_CP_IO) {
|
|
|
|
qemu_mutex_lock_iothread();
|
|
|
|
ri->writefn(env, ri, value);
|
|
|
|
qemu_mutex_unlock_iothread();
|
|
|
|
} else {
|
|
|
|
ri->writefn(env, ri, value);
|
|
|
|
}
|
2012-06-20 15:57:06 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
uint32_t HELPER(get_cp_reg)(CPUARMState *env, void *rip)
|
|
|
|
{
|
|
|
|
const ARMCPRegInfo *ri = rip;
|
tcg: drop global lock during TCG code execution
This finally allows TCG to benefit from the iothread introduction: Drop
the global mutex while running pure TCG CPU code. Reacquire the lock
when entering MMIO or PIO emulation, or when leaving the TCG loop.
We have to revert a few optimization for the current TCG threading
model, namely kicking the TCG thread in qemu_mutex_lock_iothread and not
kicking it in qemu_cpu_kick. We also need to disable RAM block
reordering until we have a more efficient locking mechanism at hand.
Still, a Linux x86 UP guest and my Musicpal ARM model boot fine here.
These numbers demonstrate where we gain something:
20338 jan 20 0 331m 75m 6904 R 99 0.9 0:50.95 qemu-system-arm
20337 jan 20 0 331m 75m 6904 S 20 0.9 0:26.50 qemu-system-arm
The guest CPU was fully loaded, but the iothread could still run mostly
independent on a second core. Without the patch we don't get beyond
32206 jan 20 0 330m 73m 7036 R 82 0.9 1:06.00 qemu-system-arm
32204 jan 20 0 330m 73m 7036 S 21 0.9 0:17.03 qemu-system-arm
We don't benefit significantly, though, when the guest is not fully
loading a host CPU.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-Id: <1439220437-23957-10-git-send-email-fred.konrad@greensocs.com>
[FK: Rebase, fix qemu_devices_reset deadlock, rm address_space_* mutex]
Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
[EGC: fixed iothread lock for cpu-exec IRQ handling]
Signed-off-by: Emilio G. Cota <cota@braap.org>
[AJB: -smp single-threaded fix, clean commit msg, BQL fixes]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
[PM: target-arm changes]
Acked-by: Peter Maydell <peter.maydell@linaro.org>
2017-02-23 21:29:11 +03:00
|
|
|
uint32_t res;
|
2014-02-20 14:35:54 +04:00
|
|
|
|
tcg: drop global lock during TCG code execution
This finally allows TCG to benefit from the iothread introduction: Drop
the global mutex while running pure TCG CPU code. Reacquire the lock
when entering MMIO or PIO emulation, or when leaving the TCG loop.
We have to revert a few optimization for the current TCG threading
model, namely kicking the TCG thread in qemu_mutex_lock_iothread and not
kicking it in qemu_cpu_kick. We also need to disable RAM block
reordering until we have a more efficient locking mechanism at hand.
Still, a Linux x86 UP guest and my Musicpal ARM model boot fine here.
These numbers demonstrate where we gain something:
20338 jan 20 0 331m 75m 6904 R 99 0.9 0:50.95 qemu-system-arm
20337 jan 20 0 331m 75m 6904 S 20 0.9 0:26.50 qemu-system-arm
The guest CPU was fully loaded, but the iothread could still run mostly
independent on a second core. Without the patch we don't get beyond
32206 jan 20 0 330m 73m 7036 R 82 0.9 1:06.00 qemu-system-arm
32204 jan 20 0 330m 73m 7036 S 21 0.9 0:17.03 qemu-system-arm
We don't benefit significantly, though, when the guest is not fully
loading a host CPU.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-Id: <1439220437-23957-10-git-send-email-fred.konrad@greensocs.com>
[FK: Rebase, fix qemu_devices_reset deadlock, rm address_space_* mutex]
Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
[EGC: fixed iothread lock for cpu-exec IRQ handling]
Signed-off-by: Emilio G. Cota <cota@braap.org>
[AJB: -smp single-threaded fix, clean commit msg, BQL fixes]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
[PM: target-arm changes]
Acked-by: Peter Maydell <peter.maydell@linaro.org>
2017-02-23 21:29:11 +03:00
|
|
|
if (ri->type & ARM_CP_IO) {
|
|
|
|
qemu_mutex_lock_iothread();
|
|
|
|
res = ri->readfn(env, ri);
|
|
|
|
qemu_mutex_unlock_iothread();
|
|
|
|
} else {
|
|
|
|
res = ri->readfn(env, ri);
|
|
|
|
}
|
|
|
|
|
|
|
|
return res;
|
2012-06-20 15:57:06 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
void HELPER(set_cp_reg64)(CPUARMState *env, void *rip, uint64_t value)
|
|
|
|
{
|
|
|
|
const ARMCPRegInfo *ri = rip;
|
2014-02-20 14:35:54 +04:00
|
|
|
|
tcg: drop global lock during TCG code execution
This finally allows TCG to benefit from the iothread introduction: Drop
the global mutex while running pure TCG CPU code. Reacquire the lock
when entering MMIO or PIO emulation, or when leaving the TCG loop.
We have to revert a few optimization for the current TCG threading
model, namely kicking the TCG thread in qemu_mutex_lock_iothread and not
kicking it in qemu_cpu_kick. We also need to disable RAM block
reordering until we have a more efficient locking mechanism at hand.
Still, a Linux x86 UP guest and my Musicpal ARM model boot fine here.
These numbers demonstrate where we gain something:
20338 jan 20 0 331m 75m 6904 R 99 0.9 0:50.95 qemu-system-arm
20337 jan 20 0 331m 75m 6904 S 20 0.9 0:26.50 qemu-system-arm
The guest CPU was fully loaded, but the iothread could still run mostly
independent on a second core. Without the patch we don't get beyond
32206 jan 20 0 330m 73m 7036 R 82 0.9 1:06.00 qemu-system-arm
32204 jan 20 0 330m 73m 7036 S 21 0.9 0:17.03 qemu-system-arm
We don't benefit significantly, though, when the guest is not fully
loading a host CPU.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-Id: <1439220437-23957-10-git-send-email-fred.konrad@greensocs.com>
[FK: Rebase, fix qemu_devices_reset deadlock, rm address_space_* mutex]
Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
[EGC: fixed iothread lock for cpu-exec IRQ handling]
Signed-off-by: Emilio G. Cota <cota@braap.org>
[AJB: -smp single-threaded fix, clean commit msg, BQL fixes]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
[PM: target-arm changes]
Acked-by: Peter Maydell <peter.maydell@linaro.org>
2017-02-23 21:29:11 +03:00
|
|
|
if (ri->type & ARM_CP_IO) {
|
|
|
|
qemu_mutex_lock_iothread();
|
|
|
|
ri->writefn(env, ri, value);
|
|
|
|
qemu_mutex_unlock_iothread();
|
|
|
|
} else {
|
|
|
|
ri->writefn(env, ri, value);
|
|
|
|
}
|
2012-06-20 15:57:06 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
uint64_t HELPER(get_cp_reg64)(CPUARMState *env, void *rip)
|
|
|
|
{
|
|
|
|
const ARMCPRegInfo *ri = rip;
|
tcg: drop global lock during TCG code execution
This finally allows TCG to benefit from the iothread introduction: Drop
the global mutex while running pure TCG CPU code. Reacquire the lock
when entering MMIO or PIO emulation, or when leaving the TCG loop.
We have to revert a few optimization for the current TCG threading
model, namely kicking the TCG thread in qemu_mutex_lock_iothread and not
kicking it in qemu_cpu_kick. We also need to disable RAM block
reordering until we have a more efficient locking mechanism at hand.
Still, a Linux x86 UP guest and my Musicpal ARM model boot fine here.
These numbers demonstrate where we gain something:
20338 jan 20 0 331m 75m 6904 R 99 0.9 0:50.95 qemu-system-arm
20337 jan 20 0 331m 75m 6904 S 20 0.9 0:26.50 qemu-system-arm
The guest CPU was fully loaded, but the iothread could still run mostly
independent on a second core. Without the patch we don't get beyond
32206 jan 20 0 330m 73m 7036 R 82 0.9 1:06.00 qemu-system-arm
32204 jan 20 0 330m 73m 7036 S 21 0.9 0:17.03 qemu-system-arm
We don't benefit significantly, though, when the guest is not fully
loading a host CPU.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-Id: <1439220437-23957-10-git-send-email-fred.konrad@greensocs.com>
[FK: Rebase, fix qemu_devices_reset deadlock, rm address_space_* mutex]
Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
[EGC: fixed iothread lock for cpu-exec IRQ handling]
Signed-off-by: Emilio G. Cota <cota@braap.org>
[AJB: -smp single-threaded fix, clean commit msg, BQL fixes]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
[PM: target-arm changes]
Acked-by: Peter Maydell <peter.maydell@linaro.org>
2017-02-23 21:29:11 +03:00
|
|
|
uint64_t res;
|
|
|
|
|
|
|
|
if (ri->type & ARM_CP_IO) {
|
|
|
|
qemu_mutex_lock_iothread();
|
|
|
|
res = ri->readfn(env, ri);
|
|
|
|
qemu_mutex_unlock_iothread();
|
|
|
|
} else {
|
|
|
|
res = ri->readfn(env, ri);
|
|
|
|
}
|
2014-02-20 14:35:54 +04:00
|
|
|
|
tcg: drop global lock during TCG code execution
This finally allows TCG to benefit from the iothread introduction: Drop
the global mutex while running pure TCG CPU code. Reacquire the lock
when entering MMIO or PIO emulation, or when leaving the TCG loop.
We have to revert a few optimization for the current TCG threading
model, namely kicking the TCG thread in qemu_mutex_lock_iothread and not
kicking it in qemu_cpu_kick. We also need to disable RAM block
reordering until we have a more efficient locking mechanism at hand.
Still, a Linux x86 UP guest and my Musicpal ARM model boot fine here.
These numbers demonstrate where we gain something:
20338 jan 20 0 331m 75m 6904 R 99 0.9 0:50.95 qemu-system-arm
20337 jan 20 0 331m 75m 6904 S 20 0.9 0:26.50 qemu-system-arm
The guest CPU was fully loaded, but the iothread could still run mostly
independent on a second core. Without the patch we don't get beyond
32206 jan 20 0 330m 73m 7036 R 82 0.9 1:06.00 qemu-system-arm
32204 jan 20 0 330m 73m 7036 S 21 0.9 0:17.03 qemu-system-arm
We don't benefit significantly, though, when the guest is not fully
loading a host CPU.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-Id: <1439220437-23957-10-git-send-email-fred.konrad@greensocs.com>
[FK: Rebase, fix qemu_devices_reset deadlock, rm address_space_* mutex]
Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
[EGC: fixed iothread lock for cpu-exec IRQ handling]
Signed-off-by: Emilio G. Cota <cota@braap.org>
[AJB: -smp single-threaded fix, clean commit msg, BQL fixes]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Pranith Kumar <bobby.prani@gmail.com>
[PM: target-arm changes]
Acked-by: Peter Maydell <peter.maydell@linaro.org>
2017-02-23 21:29:11 +03:00
|
|
|
return res;
|
2012-06-20 15:57:06 +04:00
|
|
|
}
|
2008-03-31 07:47:03 +04:00
|
|
|
|
2014-09-29 21:48:50 +04:00
|
|
|
void HELPER(pre_hvc)(CPUARMState *env)
|
|
|
|
{
|
2019-03-23 03:41:14 +03:00
|
|
|
ARMCPU *cpu = env_archcpu(env);
|
2014-10-24 15:19:14 +04:00
|
|
|
int cur_el = arm_current_el(env);
|
2014-09-29 21:48:50 +04:00
|
|
|
/* FIXME: Use actual secure state. */
|
|
|
|
bool secure = false;
|
|
|
|
bool undef;
|
|
|
|
|
2014-10-24 15:19:13 +04:00
|
|
|
if (arm_is_psci_call(cpu, EXCP_HVC)) {
|
|
|
|
/* If PSCI is enabled and this looks like a valid PSCI call then
|
|
|
|
* that overrides the architecturally mandated HVC behaviour.
|
|
|
|
*/
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2014-10-24 15:19:12 +04:00
|
|
|
if (!arm_feature(env, ARM_FEATURE_EL2)) {
|
|
|
|
/* If EL2 doesn't exist, HVC always UNDEFs */
|
|
|
|
undef = true;
|
|
|
|
} else if (arm_feature(env, ARM_FEATURE_EL3)) {
|
|
|
|
/* EL3.HCE has priority over EL2.HCD. */
|
2014-09-29 21:48:50 +04:00
|
|
|
undef = !(env->cp15.scr_el3 & SCR_HCE);
|
|
|
|
} else {
|
|
|
|
undef = env->cp15.hcr_el2 & HCR_HCD;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* In ARMv7 and ARMv8/AArch32, HVC is undef in secure state.
|
|
|
|
* For ARMv8/AArch64, HVC is allowed in EL3.
|
|
|
|
* Note that we've already trapped HVC from EL0 at translation
|
|
|
|
* time.
|
|
|
|
*/
|
|
|
|
if (secure && (!is_a64(env) || cur_el == 1)) {
|
|
|
|
undef = true;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (undef) {
|
2015-05-29 13:28:51 +03:00
|
|
|
raise_exception(env, EXCP_UDEF, syn_uncategorized(),
|
|
|
|
exception_target_el(env));
|
2014-09-29 21:48:50 +04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2014-09-29 21:48:50 +04:00
|
|
|
void HELPER(pre_smc)(CPUARMState *env, uint32_t syndrome)
|
|
|
|
{
|
2019-03-23 03:41:14 +03:00
|
|
|
ARMCPU *cpu = env_archcpu(env);
|
2014-10-24 15:19:14 +04:00
|
|
|
int cur_el = arm_current_el(env);
|
2014-10-24 15:19:15 +04:00
|
|
|
bool secure = arm_is_secure(env);
|
2018-11-19 18:29:08 +03:00
|
|
|
bool smd_flag = env->cp15.scr_el3 & SCR_SMD;
|
|
|
|
|
|
|
|
/*
|
|
|
|
* SMC behaviour is summarized in the following table.
|
|
|
|
* This helper handles the "Trap to EL2" and "Undef insn" cases.
|
|
|
|
* The "Trap to EL3" and "PSCI call" cases are handled in the exception
|
|
|
|
* helper.
|
|
|
|
*
|
|
|
|
* -> ARM_FEATURE_EL3 and !SMD
|
|
|
|
* HCR_TSC && NS EL1 !HCR_TSC || !NS EL1
|
|
|
|
*
|
|
|
|
* Conduit SMC, valid call Trap to EL2 PSCI Call
|
|
|
|
* Conduit SMC, inval call Trap to EL2 Trap to EL3
|
|
|
|
* Conduit not SMC Trap to EL2 Trap to EL3
|
|
|
|
*
|
|
|
|
*
|
|
|
|
* -> ARM_FEATURE_EL3 and SMD
|
|
|
|
* HCR_TSC && NS EL1 !HCR_TSC || !NS EL1
|
|
|
|
*
|
|
|
|
* Conduit SMC, valid call Trap to EL2 PSCI Call
|
|
|
|
* Conduit SMC, inval call Trap to EL2 Undef insn
|
|
|
|
* Conduit not SMC Trap to EL2 Undef insn
|
|
|
|
*
|
|
|
|
*
|
|
|
|
* -> !ARM_FEATURE_EL3
|
|
|
|
* HCR_TSC && NS EL1 !HCR_TSC || !NS EL1
|
|
|
|
*
|
|
|
|
* Conduit SMC, valid call Trap to EL2 PSCI Call
|
|
|
|
* Conduit SMC, inval call Trap to EL2 Undef insn
|
|
|
|
* Conduit not SMC Undef insn Undef insn
|
|
|
|
*/
|
|
|
|
|
2016-02-18 17:16:15 +03:00
|
|
|
/* On ARMv8 with EL3 AArch64, SMD applies to both S and NS state.
|
|
|
|
* On ARMv8 with EL3 AArch32, or ARMv7 with the Virtualization
|
|
|
|
* extensions, SMD only applies to NS state.
|
|
|
|
* On ARMv7 without the Virtualization extensions, the SMD bit
|
|
|
|
* doesn't exist, but we forbid the guest to set it to 1 in scr_write(),
|
|
|
|
* so we need not special case this here.
|
2014-09-29 21:48:50 +04:00
|
|
|
*/
|
2018-11-19 18:29:08 +03:00
|
|
|
bool smd = arm_feature(env, ARM_FEATURE_AARCH64) ? smd_flag
|
|
|
|
: smd_flag && !secure;
|
2014-09-29 21:48:50 +04:00
|
|
|
|
2017-10-06 18:46:47 +03:00
|
|
|
if (!arm_feature(env, ARM_FEATURE_EL3) &&
|
|
|
|
cpu->psci_conduit != QEMU_PSCI_CONDUIT_SMC) {
|
|
|
|
/* If we have no EL3 then SMC always UNDEFs and can't be
|
|
|
|
* trapped to EL2. PSCI-via-SMC is a sort of ersatz EL3
|
|
|
|
* firmware within QEMU, and we want an EL2 guest to be able
|
|
|
|
* to forbid its EL1 from making PSCI calls into QEMU's
|
|
|
|
* "firmware" via HCR.TSC, so for these purposes treat
|
|
|
|
* PSCI-via-SMC as implying an EL3.
|
2018-11-19 18:29:08 +03:00
|
|
|
* This handles the very last line of the previous table.
|
2014-10-24 15:19:13 +04:00
|
|
|
*/
|
2018-11-19 18:29:08 +03:00
|
|
|
raise_exception(env, EXCP_UDEF, syn_uncategorized(),
|
|
|
|
exception_target_el(env));
|
|
|
|
}
|
|
|
|
|
2018-12-13 16:48:08 +03:00
|
|
|
if (cur_el == 1 && (arm_hcr_el2_eff(env) & HCR_TSC)) {
|
2017-10-06 18:46:47 +03:00
|
|
|
/* In NS EL1, HCR controlled routing to EL2 has priority over SMD.
|
|
|
|
* We also want an EL2 guest to be able to forbid its EL1 from
|
|
|
|
* making PSCI calls into QEMU's "firmware" via HCR.TSC.
|
2018-11-19 18:29:08 +03:00
|
|
|
* This handles all the "Trap to EL2" cases of the previous table.
|
2017-10-06 18:46:47 +03:00
|
|
|
*/
|
2015-05-29 13:28:51 +03:00
|
|
|
raise_exception(env, EXCP_HYP_TRAP, syndrome, 2);
|
2014-09-29 21:48:50 +04:00
|
|
|
}
|
|
|
|
|
2018-11-19 18:29:08 +03:00
|
|
|
/* Catch the two remaining "Undef insn" cases of the previous table:
|
|
|
|
* - PSCI conduit is SMC but we don't have a valid PCSI call,
|
|
|
|
* - We don't have EL3 or SMD is set.
|
2017-10-06 18:46:47 +03:00
|
|
|
*/
|
2018-11-19 18:29:08 +03:00
|
|
|
if (!arm_is_psci_call(cpu, EXCP_SMC) &&
|
|
|
|
(smd || !arm_feature(env, ARM_FEATURE_EL3))) {
|
2015-05-29 13:28:51 +03:00
|
|
|
raise_exception(env, EXCP_UDEF, syn_uncategorized(),
|
|
|
|
exception_target_el(env));
|
2014-09-29 21:48:50 +04:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-03-31 07:47:48 +04:00
|
|
|
/* ??? Flag setting arithmetic is awkward because we need to do comparisons.
|
|
|
|
The only way to do that in TCG is a conditional branch, which clobbers
|
|
|
|
all our temporaries. For now implement these as helper functions. */
|
|
|
|
|
|
|
|
/* Similarly for variable shift instructions. */
|
|
|
|
|
2012-09-05 00:19:15 +04:00
|
|
|
uint32_t HELPER(shl_cc)(CPUARMState *env, uint32_t x, uint32_t i)
|
2008-03-31 07:47:48 +04:00
|
|
|
{
|
|
|
|
int shift = i & 0xff;
|
|
|
|
if (shift >= 32) {
|
|
|
|
if (shift == 32)
|
|
|
|
env->CF = x & 1;
|
|
|
|
else
|
|
|
|
env->CF = 0;
|
|
|
|
return 0;
|
|
|
|
} else if (shift != 0) {
|
|
|
|
env->CF = (x >> (32 - shift)) & 1;
|
|
|
|
return x << shift;
|
|
|
|
}
|
|
|
|
return x;
|
|
|
|
}
|
|
|
|
|
2012-09-05 00:19:15 +04:00
|
|
|
uint32_t HELPER(shr_cc)(CPUARMState *env, uint32_t x, uint32_t i)
|
2008-03-31 07:47:48 +04:00
|
|
|
{
|
|
|
|
int shift = i & 0xff;
|
|
|
|
if (shift >= 32) {
|
|
|
|
if (shift == 32)
|
|
|
|
env->CF = (x >> 31) & 1;
|
|
|
|
else
|
|
|
|
env->CF = 0;
|
|
|
|
return 0;
|
|
|
|
} else if (shift != 0) {
|
|
|
|
env->CF = (x >> (shift - 1)) & 1;
|
|
|
|
return x >> shift;
|
|
|
|
}
|
|
|
|
return x;
|
|
|
|
}
|
|
|
|
|
2012-09-05 00:19:15 +04:00
|
|
|
uint32_t HELPER(sar_cc)(CPUARMState *env, uint32_t x, uint32_t i)
|
2008-03-31 07:47:48 +04:00
|
|
|
{
|
|
|
|
int shift = i & 0xff;
|
|
|
|
if (shift >= 32) {
|
|
|
|
env->CF = (x >> 31) & 1;
|
|
|
|
return (int32_t)x >> 31;
|
|
|
|
} else if (shift != 0) {
|
|
|
|
env->CF = (x >> (shift - 1)) & 1;
|
|
|
|
return (int32_t)x >> shift;
|
|
|
|
}
|
|
|
|
return x;
|
|
|
|
}
|
|
|
|
|
2012-09-05 00:19:15 +04:00
|
|
|
uint32_t HELPER(ror_cc)(CPUARMState *env, uint32_t x, uint32_t i)
|
2008-03-31 07:47:48 +04:00
|
|
|
{
|
|
|
|
int shift1, shift;
|
|
|
|
shift1 = i & 0xff;
|
|
|
|
shift = shift1 & 0x1f;
|
|
|
|
if (shift == 0) {
|
|
|
|
if (shift1 != 0)
|
|
|
|
env->CF = (x >> 31) & 1;
|
|
|
|
return x;
|
|
|
|
} else {
|
|
|
|
env->CF = (x >> (shift - 1)) & 1;
|
|
|
|
return ((uint32_t)x >> shift) | (x << (32 - shift));
|
|
|
|
}
|
|
|
|
}
|
2020-06-26 06:31:13 +03:00
|
|
|
|
|
|
|
void HELPER(probe_access)(CPUARMState *env, target_ulong ptr,
|
|
|
|
uint32_t access_type, uint32_t mmu_idx,
|
|
|
|
uint32_t size)
|
|
|
|
{
|
|
|
|
uint32_t in_page = -((uint32_t)ptr | TARGET_PAGE_SIZE);
|
|
|
|
uintptr_t ra = GETPC();
|
|
|
|
|
|
|
|
if (likely(size <= in_page)) {
|
|
|
|
probe_access(env, ptr, size, access_type, mmu_idx, ra);
|
|
|
|
} else {
|
|
|
|
probe_access(env, ptr, in_page, access_type, mmu_idx, ra);
|
|
|
|
probe_access(env, ptr + in_page, size - in_page,
|
|
|
|
access_type, mmu_idx, ra);
|
|
|
|
}
|
|
|
|
}
|
2022-05-06 21:02:34 +03:00
|
|
|
|
|
|
|
/*
|
|
|
|
* This function corresponds to AArch64.vESBOperation().
|
|
|
|
* Note that the AArch32 version is not functionally different.
|
|
|
|
*/
|
|
|
|
void HELPER(vesb)(CPUARMState *env)
|
|
|
|
{
|
|
|
|
/*
|
|
|
|
* The EL2Enabled() check is done inside arm_hcr_el2_eff,
|
|
|
|
* and will return HCR_EL2.VSE == 0, so nothing happens.
|
|
|
|
*/
|
|
|
|
uint64_t hcr = arm_hcr_el2_eff(env);
|
|
|
|
bool enabled = !(hcr & HCR_TGE) && (hcr & HCR_AMO);
|
|
|
|
bool pending = enabled && (hcr & HCR_VSE);
|
|
|
|
bool masked = (env->daif & PSTATE_A);
|
|
|
|
|
|
|
|
/* If VSE pending and masked, defer the exception. */
|
|
|
|
if (pending && masked) {
|
|
|
|
uint32_t syndrome;
|
|
|
|
|
|
|
|
if (arm_el_is_aa64(env, 1)) {
|
|
|
|
/* Copy across IDS and ISS from VSESR. */
|
|
|
|
syndrome = env->cp15.vsesr_el2 & 0x1ffffff;
|
|
|
|
} else {
|
|
|
|
ARMMMUFaultInfo fi = { .type = ARMFault_AsyncExternal };
|
|
|
|
|
|
|
|
if (extended_addresses_enabled(env)) {
|
|
|
|
syndrome = arm_fi_to_lfsc(&fi);
|
|
|
|
} else {
|
|
|
|
syndrome = arm_fi_to_sfsc(&fi);
|
|
|
|
}
|
|
|
|
/* Copy across AET and ExT from VSESR. */
|
|
|
|
syndrome |= env->cp15.vsesr_el2 & 0xd000;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Set VDISR_EL2.A along with the syndrome. */
|
|
|
|
env->cp15.vdisr_el2 = syndrome | (1u << 31);
|
|
|
|
|
|
|
|
/* Clear pending virtual SError */
|
|
|
|
env->cp15.hcr_el2 &= ~HCR_VSE;
|
|
|
|
cpu_reset_interrupt(env_cpu(env), CPU_INTERRUPT_VSERR);
|
|
|
|
}
|
|
|
|
}
|