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cpus-common: move CPU work item management to common code

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Make CPU work core functions common between system and user-mode
emulation. User-mode does not use run_on_cpu, so do not implement it.

Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com>
Signed-off-by: Sergey Fedorov <sergey.fedorov@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <1470158864-17651-10-git-send-email-alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sergey Fedorov 2016-08-29 09:51:00 +02:00 committed by Paolo Bonzini
parent 267f685b8b
commit d148d90ee8
5 changed files with 148 additions and 91 deletions
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11
bsd-user/main.c
View file

@ -68,11 +68,11 @@ int cpu_get_pic_interrupt(CPUX86State *env)
#endif
/* These are no-ops because we are not threadsafe. */
static inline void cpu_exec_start(CPUArchState *env)
static inline void cpu_exec_start(CPUState *cpu)
{
}
static inline void cpu_exec_end(CPUArchState *env)
static inline void cpu_exec_end(CPUState *cpu)
{
}
@ -164,7 +164,11 @@ void cpu_loop(CPUX86State *env)
//target_siginfo_t info;
for(;;) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch(trapnr) {
case 0x80:
/* syscall from int $0x80 */
@ -505,7 +509,10 @@ void cpu_loop(CPUSPARCState *env)
//target_siginfo_t info;
while (1) {
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
#ifndef TARGET_SPARC64

94
cpus-common.c
View file

@ -23,10 +23,12 @@
#include "sysemu/cpus.h"
static QemuMutex qemu_cpu_list_lock;
static QemuCond qemu_work_cond;
void qemu_init_cpu_list(void)
{
qemu_mutex_init(&qemu_cpu_list_lock);
qemu_cond_init(&qemu_work_cond);
}
void cpu_list_lock(void)
@ -81,3 +83,95 @@ void cpu_list_remove(CPUState *cpu)
cpu->cpu_index = UNASSIGNED_CPU_INDEX;
qemu_mutex_unlock(&qemu_cpu_list_lock);
}
struct qemu_work_item {
struct qemu_work_item *next;
run_on_cpu_func func;
void *data;
int done;
bool free;
};
static void queue_work_on_cpu(CPUState *cpu, struct qemu_work_item *wi)
{
qemu_mutex_lock(&cpu->work_mutex);
if (cpu->queued_work_first == NULL) {
cpu->queued_work_first = wi;
} else {
cpu->queued_work_last->next = wi;
}
cpu->queued_work_last = wi;
wi->next = NULL;
wi->done = false;
qemu_mutex_unlock(&cpu->work_mutex);
qemu_cpu_kick(cpu);
}
void do_run_on_cpu(CPUState *cpu, run_on_cpu_func func, void *data,
QemuMutex *mutex)
{
struct qemu_work_item wi;
if (qemu_cpu_is_self(cpu)) {
func(cpu, data);
return;
}
wi.func = func;
wi.data = data;
wi.free = false;
queue_work_on_cpu(cpu, &wi);
while (!atomic_mb_read(&wi.done)) {
CPUState *self_cpu = current_cpu;
qemu_cond_wait(&qemu_work_cond, mutex);
current_cpu = self_cpu;
}
}
void async_run_on_cpu(CPUState *cpu, run_on_cpu_func func, void *data)
{
struct qemu_work_item *wi;
if (qemu_cpu_is_self(cpu)) {
func(cpu, data);
return;
}
wi = g_malloc0(sizeof(struct qemu_work_item));
wi->func = func;
wi->data = data;
wi->free = true;
queue_work_on_cpu(cpu, wi);
}
void process_queued_cpu_work(CPUState *cpu)
{
struct qemu_work_item *wi;
if (cpu->queued_work_first == NULL) {
return;
}
qemu_mutex_lock(&cpu->work_mutex);
while (cpu->queued_work_first != NULL) {
wi = cpu->queued_work_first;
cpu->queued_work_first = wi->next;
if (!cpu->queued_work_first) {
cpu->queued_work_last = NULL;
}
qemu_mutex_unlock(&cpu->work_mutex);
wi->func(cpu, wi->data);
qemu_mutex_lock(&cpu->work_mutex);
if (wi->free) {
g_free(wi);
} else {
atomic_mb_set(&wi->done, true);
}
}
qemu_mutex_unlock(&cpu->work_mutex);
qemu_cond_broadcast(&qemu_work_cond);
}

82
cpus.c
View file

@ -902,73 +902,21 @@ static QemuThread io_thread;
static QemuCond qemu_cpu_cond;
/* system init */
static QemuCond qemu_pause_cond;
static QemuCond qemu_work_cond;
void qemu_init_cpu_loop(void)
{
qemu_init_sigbus();
qemu_cond_init(&qemu_cpu_cond);
qemu_cond_init(&qemu_pause_cond);
qemu_cond_init(&qemu_work_cond);
qemu_cond_init(&qemu_io_proceeded_cond);
qemu_mutex_init(&qemu_global_mutex);
qemu_thread_get_self(&io_thread);
}
static void queue_work_on_cpu(CPUState *cpu, struct qemu_work_item *wi)
{
qemu_mutex_lock(&cpu->work_mutex);
if (cpu->queued_work_first == NULL) {
cpu->queued_work_first = wi;
} else {
cpu->queued_work_last->next = wi;
}
cpu->queued_work_last = wi;
wi->next = NULL;
wi->done = false;
qemu_mutex_unlock(&cpu->work_mutex);
qemu_cpu_kick(cpu);
}
void run_on_cpu(CPUState *cpu, run_on_cpu_func func, void *data)
{
struct qemu_work_item wi;
if (qemu_cpu_is_self(cpu)) {
func(cpu, data);
return;
}
wi.func = func;
wi.data = data;
wi.free = false;
queue_work_on_cpu(cpu, &wi);
while (!atomic_mb_read(&wi.done)) {
CPUState *self_cpu = current_cpu;
qemu_cond_wait(&qemu_work_cond, &qemu_global_mutex);
current_cpu = self_cpu;
}
}
void async_run_on_cpu(CPUState *cpu, run_on_cpu_func func, void *data)
{
struct qemu_work_item *wi;
if (qemu_cpu_is_self(cpu)) {
func(cpu, data);
return;
}
wi = g_malloc0(sizeof(struct qemu_work_item));
wi->func = func;
wi->data = data;
wi->free = true;
queue_work_on_cpu(cpu, wi);
do_run_on_cpu(cpu, func, data, &qemu_global_mutex);
}
static void qemu_kvm_destroy_vcpu(CPUState *cpu)
@ -983,34 +931,6 @@ static void qemu_tcg_destroy_vcpu(CPUState *cpu)
{
}
static void process_queued_cpu_work(CPUState *cpu)
{
struct qemu_work_item *wi;
if (cpu->queued_work_first == NULL) {
return;
}
qemu_mutex_lock(&cpu->work_mutex);
while (cpu->queued_work_first != NULL) {
wi = cpu->queued_work_first;
cpu->queued_work_first = wi->next;
if (!cpu->queued_work_first) {
cpu->queued_work_last = NULL;
}
qemu_mutex_unlock(&cpu->work_mutex);
wi->func(cpu, wi->data);
qemu_mutex_lock(&cpu->work_mutex);
if (wi->free) {
g_free(wi);
} else {
atomic_mb_set(&wi->done, true);
}
}
qemu_mutex_unlock(&cpu->work_mutex);
qemu_cond_broadcast(&qemu_work_cond);
}
static void qemu_wait_io_event_common(CPUState *cpu)
{
if (cpu->stop) {

27
include/qom/cpu.h
View file

@ -233,14 +233,7 @@ struct kvm_run;
/* work queue */
typedef void (*run_on_cpu_func)(CPUState *cpu, void *data);
struct qemu_work_item {
struct qemu_work_item *next;
run_on_cpu_func func;
void *data;
int done;
bool free;
};
struct qemu_work_item;
/**
* CPUState:
@ -629,6 +622,18 @@ void qemu_cpu_kick(CPUState *cpu);
*/
bool cpu_is_stopped(CPUState *cpu);
/**
* do_run_on_cpu:
* @cpu: The vCPU to run on.
* @func: The function to be executed.
* @data: Data to pass to the function.
* @mutex: Mutex to release while waiting for @func to run.
*
* Used internally in the implementation of run_on_cpu.
*/
void do_run_on_cpu(CPUState *cpu, run_on_cpu_func func, void *data,
QemuMutex *mutex);
/**
* run_on_cpu:
* @cpu: The vCPU to run on.
@ -807,6 +812,12 @@ void cpu_remove(CPUState *cpu);
*/
void cpu_remove_sync(CPUState *cpu);
/**
* process_queued_cpu_work() - process all items on CPU work queue
* @cpu: The CPU which work queue to process.
*/
void process_queued_cpu_work(CPUState *cpu);
/**
* qemu_init_vcpu:
* @cpu: The vCPU to initialize.

25
linux-user/main.c
View file

@ -294,6 +294,8 @@ void cpu_loop(CPUX86State *env)
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch(trapnr) {
case 0x80:
/* linux syscall from int $0x80 */
@ -735,6 +737,8 @@ void cpu_loop(CPUARMState *env)
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch(trapnr) {
case EXCP_UDEF:
{
@ -1071,6 +1075,7 @@ void cpu_loop(CPUARMState *env)
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case EXCP_SWI:
@ -1159,6 +1164,8 @@ void cpu_loop(CPUUniCore32State *env)
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case UC32_EXCP_PRIV:
{
@ -1364,6 +1371,7 @@ void cpu_loop (CPUSPARCState *env)
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
/* Compute PSR before exposing state. */
if (env->cc_op != CC_OP_FLAGS) {
@ -1636,6 +1644,8 @@ void cpu_loop(CPUPPCState *env)
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch(trapnr) {
case POWERPC_EXCP_NONE:
/* Just go on */
@ -2482,6 +2492,8 @@ void cpu_loop(CPUMIPSState *env)
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch(trapnr) {
case EXCP_SYSCALL:
env->active_tc.PC += 4;
@ -2722,6 +2734,7 @@ void cpu_loop(CPUOpenRISCState *env)
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
gdbsig = 0;
switch (trapnr) {
@ -2816,6 +2829,7 @@ void cpu_loop(CPUSH4State *env)
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case 0x160:
@ -2882,6 +2896,8 @@ void cpu_loop(CPUCRISState *env)
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case 0xaa:
{
@ -2947,6 +2963,8 @@ void cpu_loop(CPUMBState *env)
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case 0xaa:
{
@ -3064,6 +3082,8 @@ void cpu_loop(CPUM68KState *env)
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch(trapnr) {
case EXCP_ILLEGAL:
{
@ -3207,6 +3227,7 @@ void cpu_loop(CPUAlphaState *env)
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
/* All of the traps imply a transition through PALcode, which
implies an REI instruction has been executed. Which means
@ -3399,6 +3420,8 @@ void cpu_loop(CPUS390XState *env)
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case EXCP_INTERRUPT:
/* Just indicate that signals should be handled asap. */
@ -3708,6 +3731,8 @@ void cpu_loop(CPUTLGState *env)
cpu_exec_start(cs);
trapnr = cpu_exec(cs);
cpu_exec_end(cs);
process_queued_cpu_work(cs);
switch (trapnr) {
case TILEGX_EXCP_SYSCALL:
{