qemu/target/s390x/tcg/misc_helper.c
Janis Schoetterl-Glausch f8333de279 target/s390x/tcg: SPX: check validity of new prefix
According to the architecture, SET PREFIX must try to access the new
prefix area and recognize an addressing exception if the area is not
accessible.
For qemu this check prevents a crash in cpu_map_lowcore after an
inaccessible prefix area has been set.

Signed-off-by: Janis Schoetterl-Glausch <scgl@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20220630094340.3646279-1-scgl@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2022-07-06 12:14:16 +02:00

806 lines
23 KiB
C

/*
* S/390 misc helper routines
*
* Copyright (c) 2009 Ulrich Hecht
* Copyright (c) 2009 Alexander Graf
*
* 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
* version 2.1 of the License, or (at your option) any later version.
*
* 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
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "qemu/osdep.h"
#include "qemu/cutils.h"
#include "qemu/main-loop.h"
#include "cpu.h"
#include "s390x-internal.h"
#include "exec/memory.h"
#include "qemu/host-utils.h"
#include "exec/helper-proto.h"
#include "qemu/timer.h"
#include "exec/exec-all.h"
#include "exec/cpu_ldst.h"
#include "qapi/error.h"
#include "tcg_s390x.h"
#include "s390-tod.h"
#if !defined(CONFIG_USER_ONLY)
#include "sysemu/cpus.h"
#include "sysemu/sysemu.h"
#include "hw/s390x/ebcdic.h"
#include "hw/s390x/s390-virtio-hcall.h"
#include "hw/s390x/sclp.h"
#include "hw/s390x/s390_flic.h"
#include "hw/s390x/ioinst.h"
#include "hw/s390x/s390-pci-inst.h"
#include "hw/boards.h"
#include "hw/s390x/tod.h"
#endif
/* #define DEBUG_HELPER */
#ifdef DEBUG_HELPER
#define HELPER_LOG(x...) qemu_log(x)
#else
#define HELPER_LOG(x...)
#endif
/* Raise an exception statically from a TB. */
void HELPER(exception)(CPUS390XState *env, uint32_t excp)
{
CPUState *cs = env_cpu(env);
HELPER_LOG("%s: exception %d\n", __func__, excp);
cs->exception_index = excp;
cpu_loop_exit(cs);
}
/* Store CPU Timer (also used for EXTRACT CPU TIME) */
uint64_t HELPER(stpt)(CPUS390XState *env)
{
#if defined(CONFIG_USER_ONLY)
/*
* Fake a descending CPU timer. We could get negative values here,
* but we don't care as it is up to the OS when to process that
* interrupt and reset to > 0.
*/
return UINT64_MAX - (uint64_t)cpu_get_host_ticks();
#else
return time2tod(env->cputm - qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL));
#endif
}
/* Store Clock */
uint64_t HELPER(stck)(CPUS390XState *env)
{
#ifdef CONFIG_USER_ONLY
struct timespec ts;
uint64_t ns;
clock_gettime(CLOCK_REALTIME, &ts);
ns = ts.tv_sec * NANOSECONDS_PER_SECOND + ts.tv_nsec;
return TOD_UNIX_EPOCH + time2tod(ns);
#else
S390TODState *td = s390_get_todstate();
S390TODClass *tdc = S390_TOD_GET_CLASS(td);
S390TOD tod;
tdc->get(td, &tod, &error_abort);
return tod.low;
#endif
}
#ifndef CONFIG_USER_ONLY
/* SCLP service call */
uint32_t HELPER(servc)(CPUS390XState *env, uint64_t r1, uint64_t r2)
{
qemu_mutex_lock_iothread();
int r = sclp_service_call(env, r1, r2);
qemu_mutex_unlock_iothread();
if (r < 0) {
tcg_s390_program_interrupt(env, -r, GETPC());
}
return r;
}
void HELPER(diag)(CPUS390XState *env, uint32_t r1, uint32_t r3, uint32_t num)
{
uint64_t r;
switch (num) {
case 0x500:
/* KVM hypercall */
qemu_mutex_lock_iothread();
r = s390_virtio_hypercall(env);
qemu_mutex_unlock_iothread();
break;
case 0x44:
/* yield */
r = 0;
break;
case 0x308:
/* ipl */
qemu_mutex_lock_iothread();
handle_diag_308(env, r1, r3, GETPC());
qemu_mutex_unlock_iothread();
r = 0;
break;
case 0x288:
/* time bomb (watchdog) */
r = handle_diag_288(env, r1, r3);
break;
default:
r = -1;
break;
}
if (r) {
tcg_s390_program_interrupt(env, PGM_SPECIFICATION, GETPC());
}
}
/* Set Prefix */
void HELPER(spx)(CPUS390XState *env, uint64_t a1)
{
const uint32_t prefix = a1 & 0x7fffe000;
const uint32_t old_prefix = env->psa;
CPUState *cs = env_cpu(env);
if (prefix == old_prefix) {
return;
}
/*
* Since prefix got aligned to 8k and memory increments are a multiple of
* 8k checking the first page is sufficient
*/
if (!mmu_absolute_addr_valid(prefix, true)) {
tcg_s390_program_interrupt(env, PGM_ADDRESSING, GETPC());
}
env->psa = prefix;
HELPER_LOG("prefix: %#x\n", prefix);
tlb_flush_page(cs, 0);
tlb_flush_page(cs, TARGET_PAGE_SIZE);
if (prefix != 0) {
tlb_flush_page(cs, prefix);
tlb_flush_page(cs, prefix + TARGET_PAGE_SIZE);
}
if (old_prefix != 0) {
tlb_flush_page(cs, old_prefix);
tlb_flush_page(cs, old_prefix + TARGET_PAGE_SIZE);
}
}
static void update_ckc_timer(CPUS390XState *env)
{
S390TODState *td = s390_get_todstate();
uint64_t time;
/* stop the timer and remove pending CKC IRQs */
timer_del(env->tod_timer);
g_assert(qemu_mutex_iothread_locked());
env->pending_int &= ~INTERRUPT_EXT_CLOCK_COMPARATOR;
/* the tod has to exceed the ckc, this can never happen if ckc is all 1's */
if (env->ckc == -1ULL) {
return;
}
/* difference between origins */
time = env->ckc - td->base.low;
/* nanoseconds */
time = tod2time(time);
timer_mod(env->tod_timer, time);
}
/* Set Clock Comparator */
void HELPER(sckc)(CPUS390XState *env, uint64_t ckc)
{
env->ckc = ckc;
qemu_mutex_lock_iothread();
update_ckc_timer(env);
qemu_mutex_unlock_iothread();
}
void tcg_s390_tod_updated(CPUState *cs, run_on_cpu_data opaque)
{
S390CPU *cpu = S390_CPU(cs);
update_ckc_timer(&cpu->env);
}
/* Set Clock */
uint32_t HELPER(sck)(CPUS390XState *env, uint64_t tod_low)
{
S390TODState *td = s390_get_todstate();
S390TODClass *tdc = S390_TOD_GET_CLASS(td);
S390TOD tod = {
.high = 0,
.low = tod_low,
};
qemu_mutex_lock_iothread();
tdc->set(td, &tod, &error_abort);
qemu_mutex_unlock_iothread();
return 0;
}
/* Set Tod Programmable Field */
void HELPER(sckpf)(CPUS390XState *env, uint64_t r0)
{
uint32_t val = r0;
if (val & 0xffff0000) {
tcg_s390_program_interrupt(env, PGM_SPECIFICATION, GETPC());
}
env->todpr = val;
}
/* Store Clock Comparator */
uint64_t HELPER(stckc)(CPUS390XState *env)
{
return env->ckc;
}
/* Set CPU Timer */
void HELPER(spt)(CPUS390XState *env, uint64_t time)
{
if (time == -1ULL) {
return;
}
/* nanoseconds */
time = tod2time(time);
env->cputm = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + time;
timer_mod(env->cpu_timer, env->cputm);
}
/* Store System Information */
uint32_t HELPER(stsi)(CPUS390XState *env, uint64_t a0, uint64_t r0, uint64_t r1)
{
const uintptr_t ra = GETPC();
const uint32_t sel1 = r0 & STSI_R0_SEL1_MASK;
const uint32_t sel2 = r1 & STSI_R1_SEL2_MASK;
const MachineState *ms = MACHINE(qdev_get_machine());
uint16_t total_cpus = 0, conf_cpus = 0, reserved_cpus = 0;
S390CPU *cpu = env_archcpu(env);
SysIB sysib = { };
int i, cc = 0;
if ((r0 & STSI_R0_FC_MASK) > STSI_R0_FC_LEVEL_3) {
/* invalid function code: no other checks are performed */
return 3;
}
if ((r0 & STSI_R0_RESERVED_MASK) || (r1 & STSI_R1_RESERVED_MASK)) {
tcg_s390_program_interrupt(env, PGM_SPECIFICATION, ra);
}
if ((r0 & STSI_R0_FC_MASK) == STSI_R0_FC_CURRENT) {
/* query the current level: no further checks are performed */
env->regs[0] = STSI_R0_FC_LEVEL_3;
return 0;
}
if (a0 & ~TARGET_PAGE_MASK) {
tcg_s390_program_interrupt(env, PGM_SPECIFICATION, ra);
}
/* count the cpus and split them into configured and reserved ones */
for (i = 0; i < ms->possible_cpus->len; i++) {
total_cpus++;
if (ms->possible_cpus->cpus[i].cpu) {
conf_cpus++;
} else {
reserved_cpus++;
}
}
/*
* In theory, we could report Level 1 / Level 2 as current. However,
* the Linux kernel will detect this as running under LPAR and assume
* that we have a sclp linemode console (which is always present on
* LPAR, but not the default for QEMU), therefore not displaying boot
* messages and making booting a Linux kernel under TCG harder.
*
* For now we fake the same SMP configuration on all levels.
*
* TODO: We could later make the level configurable via the machine
* and change defaults (linemode console) based on machine type
* and accelerator.
*/
switch (r0 & STSI_R0_FC_MASK) {
case STSI_R0_FC_LEVEL_1:
if ((sel1 == 1) && (sel2 == 1)) {
/* Basic Machine Configuration */
char type[5] = {};
ebcdic_put(sysib.sysib_111.manuf, "QEMU ", 16);
/* same as machine type number in STORE CPU ID, but in EBCDIC */
snprintf(type, ARRAY_SIZE(type), "%X", cpu->model->def->type);
ebcdic_put(sysib.sysib_111.type, type, 4);
/* model number (not stored in STORE CPU ID for z/Architecure) */
ebcdic_put(sysib.sysib_111.model, "QEMU ", 16);
ebcdic_put(sysib.sysib_111.sequence, "QEMU ", 16);
ebcdic_put(sysib.sysib_111.plant, "QEMU", 4);
} else if ((sel1 == 2) && (sel2 == 1)) {
/* Basic Machine CPU */
ebcdic_put(sysib.sysib_121.sequence, "QEMUQEMUQEMUQEMU", 16);
ebcdic_put(sysib.sysib_121.plant, "QEMU", 4);
sysib.sysib_121.cpu_addr = cpu_to_be16(env->core_id);
} else if ((sel1 == 2) && (sel2 == 2)) {
/* Basic Machine CPUs */
sysib.sysib_122.capability = cpu_to_be32(0x443afc29);
sysib.sysib_122.total_cpus = cpu_to_be16(total_cpus);
sysib.sysib_122.conf_cpus = cpu_to_be16(conf_cpus);
sysib.sysib_122.reserved_cpus = cpu_to_be16(reserved_cpus);
} else {
cc = 3;
}
break;
case STSI_R0_FC_LEVEL_2:
if ((sel1 == 2) && (sel2 == 1)) {
/* LPAR CPU */
ebcdic_put(sysib.sysib_221.sequence, "QEMUQEMUQEMUQEMU", 16);
ebcdic_put(sysib.sysib_221.plant, "QEMU", 4);
sysib.sysib_221.cpu_addr = cpu_to_be16(env->core_id);
} else if ((sel1 == 2) && (sel2 == 2)) {
/* LPAR CPUs */
sysib.sysib_222.lcpuc = 0x80; /* dedicated */
sysib.sysib_222.total_cpus = cpu_to_be16(total_cpus);
sysib.sysib_222.conf_cpus = cpu_to_be16(conf_cpus);
sysib.sysib_222.reserved_cpus = cpu_to_be16(reserved_cpus);
ebcdic_put(sysib.sysib_222.name, "QEMU ", 8);
sysib.sysib_222.caf = cpu_to_be32(1000);
sysib.sysib_222.dedicated_cpus = cpu_to_be16(conf_cpus);
} else {
cc = 3;
}
break;
case STSI_R0_FC_LEVEL_3:
if ((sel1 == 2) && (sel2 == 2)) {
/* VM CPUs */
sysib.sysib_322.count = 1;
sysib.sysib_322.vm[0].total_cpus = cpu_to_be16(total_cpus);
sysib.sysib_322.vm[0].conf_cpus = cpu_to_be16(conf_cpus);
sysib.sysib_322.vm[0].reserved_cpus = cpu_to_be16(reserved_cpus);
sysib.sysib_322.vm[0].caf = cpu_to_be32(1000);
/* Linux kernel uses this to distinguish us from z/VM */
ebcdic_put(sysib.sysib_322.vm[0].cpi, "KVM/Linux ", 16);
sysib.sysib_322.vm[0].ext_name_encoding = 2; /* UTF-8 */
/* If our VM has a name, use the real name */
if (qemu_name) {
memset(sysib.sysib_322.vm[0].name, 0x40,
sizeof(sysib.sysib_322.vm[0].name));
ebcdic_put(sysib.sysib_322.vm[0].name, qemu_name,
MIN(sizeof(sysib.sysib_322.vm[0].name),
strlen(qemu_name)));
strpadcpy((char *)sysib.sysib_322.ext_names[0],
sizeof(sysib.sysib_322.ext_names[0]),
qemu_name, '\0');
} else {
ebcdic_put(sysib.sysib_322.vm[0].name, "TCGguest", 8);
strcpy((char *)sysib.sysib_322.ext_names[0], "TCGguest");
}
/* add the uuid */
memcpy(sysib.sysib_322.vm[0].uuid, &qemu_uuid,
sizeof(sysib.sysib_322.vm[0].uuid));
} else {
cc = 3;
}
break;
}
if (cc == 0) {
if (s390_cpu_virt_mem_write(cpu, a0, 0, &sysib, sizeof(sysib))) {
s390_cpu_virt_mem_handle_exc(cpu, ra);
}
}
return cc;
}
uint32_t HELPER(sigp)(CPUS390XState *env, uint64_t order_code, uint32_t r1,
uint32_t r3)
{
int cc;
/* TODO: needed to inject interrupts - push further down */
qemu_mutex_lock_iothread();
cc = handle_sigp(env, order_code & SIGP_ORDER_MASK, r1, r3);
qemu_mutex_unlock_iothread();
return cc;
}
#endif
#ifndef CONFIG_USER_ONLY
void HELPER(xsch)(CPUS390XState *env, uint64_t r1)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
ioinst_handle_xsch(cpu, r1, GETPC());
qemu_mutex_unlock_iothread();
}
void HELPER(csch)(CPUS390XState *env, uint64_t r1)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
ioinst_handle_csch(cpu, r1, GETPC());
qemu_mutex_unlock_iothread();
}
void HELPER(hsch)(CPUS390XState *env, uint64_t r1)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
ioinst_handle_hsch(cpu, r1, GETPC());
qemu_mutex_unlock_iothread();
}
void HELPER(msch)(CPUS390XState *env, uint64_t r1, uint64_t inst)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
ioinst_handle_msch(cpu, r1, inst >> 16, GETPC());
qemu_mutex_unlock_iothread();
}
void HELPER(rchp)(CPUS390XState *env, uint64_t r1)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
ioinst_handle_rchp(cpu, r1, GETPC());
qemu_mutex_unlock_iothread();
}
void HELPER(rsch)(CPUS390XState *env, uint64_t r1)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
ioinst_handle_rsch(cpu, r1, GETPC());
qemu_mutex_unlock_iothread();
}
void HELPER(sal)(CPUS390XState *env, uint64_t r1)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
ioinst_handle_sal(cpu, r1, GETPC());
qemu_mutex_unlock_iothread();
}
void HELPER(schm)(CPUS390XState *env, uint64_t r1, uint64_t r2, uint64_t inst)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
ioinst_handle_schm(cpu, r1, r2, inst >> 16, GETPC());
qemu_mutex_unlock_iothread();
}
void HELPER(ssch)(CPUS390XState *env, uint64_t r1, uint64_t inst)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
ioinst_handle_ssch(cpu, r1, inst >> 16, GETPC());
qemu_mutex_unlock_iothread();
}
void HELPER(stcrw)(CPUS390XState *env, uint64_t inst)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
ioinst_handle_stcrw(cpu, inst >> 16, GETPC());
qemu_mutex_unlock_iothread();
}
void HELPER(stsch)(CPUS390XState *env, uint64_t r1, uint64_t inst)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
ioinst_handle_stsch(cpu, r1, inst >> 16, GETPC());
qemu_mutex_unlock_iothread();
}
uint32_t HELPER(tpi)(CPUS390XState *env, uint64_t addr)
{
const uintptr_t ra = GETPC();
S390CPU *cpu = env_archcpu(env);
QEMUS390FLICState *flic = s390_get_qemu_flic(s390_get_flic());
QEMUS390FlicIO *io = NULL;
LowCore *lowcore;
if (addr & 0x3) {
tcg_s390_program_interrupt(env, PGM_SPECIFICATION, ra);
}
qemu_mutex_lock_iothread();
io = qemu_s390_flic_dequeue_io(flic, env->cregs[6]);
if (!io) {
qemu_mutex_unlock_iothread();
return 0;
}
if (addr) {
struct {
uint16_t id;
uint16_t nr;
uint32_t parm;
} intc = {
.id = cpu_to_be16(io->id),
.nr = cpu_to_be16(io->nr),
.parm = cpu_to_be32(io->parm),
};
if (s390_cpu_virt_mem_write(cpu, addr, 0, &intc, sizeof(intc))) {
/* writing failed, reinject and properly clean up */
s390_io_interrupt(io->id, io->nr, io->parm, io->word);
qemu_mutex_unlock_iothread();
g_free(io);
s390_cpu_virt_mem_handle_exc(cpu, ra);
return 0;
}
} else {
/* no protection applies */
lowcore = cpu_map_lowcore(env);
lowcore->subchannel_id = cpu_to_be16(io->id);
lowcore->subchannel_nr = cpu_to_be16(io->nr);
lowcore->io_int_parm = cpu_to_be32(io->parm);
lowcore->io_int_word = cpu_to_be32(io->word);
cpu_unmap_lowcore(lowcore);
}
g_free(io);
qemu_mutex_unlock_iothread();
return 1;
}
void HELPER(tsch)(CPUS390XState *env, uint64_t r1, uint64_t inst)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
ioinst_handle_tsch(cpu, r1, inst >> 16, GETPC());
qemu_mutex_unlock_iothread();
}
void HELPER(chsc)(CPUS390XState *env, uint64_t inst)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
ioinst_handle_chsc(cpu, inst >> 16, GETPC());
qemu_mutex_unlock_iothread();
}
#endif
#ifndef CONFIG_USER_ONLY
void HELPER(per_check_exception)(CPUS390XState *env)
{
if (env->per_perc_atmid) {
tcg_s390_program_interrupt(env, PGM_PER, GETPC());
}
}
/* Check if an address is within the PER starting address and the PER
ending address. The address range might loop. */
static inline bool get_per_in_range(CPUS390XState *env, uint64_t addr)
{
if (env->cregs[10] <= env->cregs[11]) {
return env->cregs[10] <= addr && addr <= env->cregs[11];
} else {
return env->cregs[10] <= addr || addr <= env->cregs[11];
}
}
void HELPER(per_branch)(CPUS390XState *env, uint64_t from, uint64_t to)
{
if ((env->cregs[9] & PER_CR9_EVENT_BRANCH)) {
if (!(env->cregs[9] & PER_CR9_CONTROL_BRANCH_ADDRESS)
|| get_per_in_range(env, to)) {
env->per_address = from;
env->per_perc_atmid = PER_CODE_EVENT_BRANCH | get_per_atmid(env);
}
}
}
void HELPER(per_ifetch)(CPUS390XState *env, uint64_t addr)
{
if ((env->cregs[9] & PER_CR9_EVENT_IFETCH) && get_per_in_range(env, addr)) {
env->per_address = addr;
env->per_perc_atmid = PER_CODE_EVENT_IFETCH | get_per_atmid(env);
/* If the instruction has to be nullified, trigger the
exception immediately. */
if (env->cregs[9] & PER_CR9_EVENT_NULLIFICATION) {
CPUState *cs = env_cpu(env);
env->per_perc_atmid |= PER_CODE_EVENT_NULLIFICATION;
env->int_pgm_code = PGM_PER;
env->int_pgm_ilen = get_ilen(cpu_ldub_code(env, addr));
cs->exception_index = EXCP_PGM;
cpu_loop_exit(cs);
}
}
}
void HELPER(per_store_real)(CPUS390XState *env)
{
if ((env->cregs[9] & PER_CR9_EVENT_STORE) &&
(env->cregs[9] & PER_CR9_EVENT_STORE_REAL)) {
/* PSW is saved just before calling the helper. */
env->per_address = env->psw.addr;
env->per_perc_atmid = PER_CODE_EVENT_STORE_REAL | get_per_atmid(env);
}
}
#endif
static uint8_t stfl_bytes[2048];
static unsigned int used_stfl_bytes;
static void prepare_stfl(void)
{
static bool initialized;
int i;
/* racy, but we don't care, the same values are always written */
if (initialized) {
return;
}
s390_get_feat_block(S390_FEAT_TYPE_STFL, stfl_bytes);
for (i = 0; i < sizeof(stfl_bytes); i++) {
if (stfl_bytes[i]) {
used_stfl_bytes = i + 1;
}
}
initialized = true;
}
#ifndef CONFIG_USER_ONLY
void HELPER(stfl)(CPUS390XState *env)
{
LowCore *lowcore;
lowcore = cpu_map_lowcore(env);
prepare_stfl();
memcpy(&lowcore->stfl_fac_list, stfl_bytes, sizeof(lowcore->stfl_fac_list));
cpu_unmap_lowcore(lowcore);
}
#endif
uint32_t HELPER(stfle)(CPUS390XState *env, uint64_t addr)
{
const uintptr_t ra = GETPC();
const int count_bytes = ((env->regs[0] & 0xff) + 1) * 8;
int max_bytes;
int i;
if (addr & 0x7) {
tcg_s390_program_interrupt(env, PGM_SPECIFICATION, ra);
}
prepare_stfl();
max_bytes = ROUND_UP(used_stfl_bytes, 8);
/*
* The PoP says that doublewords beyond the highest-numbered facility
* bit may or may not be stored. However, existing hardware appears to
* not store the words, and existing software depend on that.
*/
for (i = 0; i < MIN(count_bytes, max_bytes); ++i) {
cpu_stb_data_ra(env, addr + i, stfl_bytes[i], ra);
}
env->regs[0] = deposit64(env->regs[0], 0, 8, (max_bytes / 8) - 1);
return count_bytes >= max_bytes ? 0 : 3;
}
#ifndef CONFIG_USER_ONLY
/*
* Note: we ignore any return code of the functions called for the pci
* instructions, as the only time they return !0 is when the stub is
* called, and in that case we didn't even offer the zpci facility.
* The only exception is SIC, where program checks need to be handled
* by the caller.
*/
void HELPER(clp)(CPUS390XState *env, uint32_t r2)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
clp_service_call(cpu, r2, GETPC());
qemu_mutex_unlock_iothread();
}
void HELPER(pcilg)(CPUS390XState *env, uint32_t r1, uint32_t r2)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
pcilg_service_call(cpu, r1, r2, GETPC());
qemu_mutex_unlock_iothread();
}
void HELPER(pcistg)(CPUS390XState *env, uint32_t r1, uint32_t r2)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
pcistg_service_call(cpu, r1, r2, GETPC());
qemu_mutex_unlock_iothread();
}
void HELPER(stpcifc)(CPUS390XState *env, uint32_t r1, uint64_t fiba,
uint32_t ar)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
stpcifc_service_call(cpu, r1, fiba, ar, GETPC());
qemu_mutex_unlock_iothread();
}
void HELPER(sic)(CPUS390XState *env, uint64_t r1, uint64_t r3)
{
int r;
qemu_mutex_lock_iothread();
r = css_do_sic(env, (r3 >> 27) & 0x7, r1 & 0xffff);
qemu_mutex_unlock_iothread();
/* css_do_sic() may actually return a PGM_xxx value to inject */
if (r) {
tcg_s390_program_interrupt(env, -r, GETPC());
}
}
void HELPER(rpcit)(CPUS390XState *env, uint32_t r1, uint32_t r2)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
rpcit_service_call(cpu, r1, r2, GETPC());
qemu_mutex_unlock_iothread();
}
void HELPER(pcistb)(CPUS390XState *env, uint32_t r1, uint32_t r3,
uint64_t gaddr, uint32_t ar)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
pcistb_service_call(cpu, r1, r3, gaddr, ar, GETPC());
qemu_mutex_unlock_iothread();
}
void HELPER(mpcifc)(CPUS390XState *env, uint32_t r1, uint64_t fiba,
uint32_t ar)
{
S390CPU *cpu = env_archcpu(env);
qemu_mutex_lock_iothread();
mpcifc_service_call(cpu, r1, fiba, ar, GETPC());
qemu_mutex_unlock_iothread();
}
#endif