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cpus: add handle_interrupt to the CpusAccel interface 

kvm: uses the generic handler
qtest: uses the generic handler
whpx: changed to use the generic handler (identical implementation)
hax: changed to use the generic handler (identical implementation)
hvf: changed to use the generic handler (identical implementation)
tcg: adapt tcg-cpus to point to the tcg-specific handler

Signed-off-by: Claudio Fontana <cfontana@suse.de>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Claudio Fontana 2020-08-11 15:16:33 +02:00 committed by Paolo Bonzini
parent 994aa17200
commit bb4776be77
9 changed files with 48 additions and 82 deletions
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26
accel/tcg/tcg-all.c
View File

@ -47,31 +47,6 @@ typedef struct TCGState TCGState;
DECLARE_INSTANCE_CHECKER(TCGState, TCG_STATE,
TYPE_TCG_ACCEL)
/* mask must never be zero, except for A20 change call */
static void tcg_handle_interrupt(CPUState *cpu, int mask)
{
int old_mask;
g_assert(qemu_mutex_iothread_locked());
old_mask = cpu->interrupt_request;
cpu->interrupt_request |= mask;
/*
* If called from iothread context, wake the target cpu in
* case its halted.
*/
if (!qemu_cpu_is_self(cpu)) {
qemu_cpu_kick(cpu);
} else {
qatomic_set(&cpu_neg(cpu)->icount_decr.u16.high, -1);
if (icount_enabled() &&
!cpu->can_do_io
&& (mask & ~old_mask) != 0) {
cpu_abort(cpu, "Raised interrupt while not in I/O function");
}
}
}
/*
* We default to false if we know other options have been enabled
* which are currently incompatible with MTTCG. Otherwise when each
@ -128,7 +103,6 @@ static int tcg_init(MachineState *ms)
TCGState *s = TCG_STATE(current_accel());
tcg_exec_init(s->tb_size * 1024 * 1024);
cpu_interrupt_handler = tcg_handle_interrupt;
mttcg_enabled = s->mttcg_enabled;
cpus_register_accel(&tcg_cpus);

28
accel/tcg/tcg-cpus.c
View File

@ -543,9 +543,37 @@ static int64_t tcg_get_elapsed_ticks(void)
return cpu_get_ticks();
}
/* mask must never be zero, except for A20 change call */
static void tcg_handle_interrupt(CPUState *cpu, int mask)
{
int old_mask;
g_assert(qemu_mutex_iothread_locked());
old_mask = cpu->interrupt_request;
cpu->interrupt_request |= mask;
/*
* If called from iothread context, wake the target cpu in
* case its halted.
*/
if (!qemu_cpu_is_self(cpu)) {
qemu_cpu_kick(cpu);
} else {
qatomic_set(&cpu_neg(cpu)->icount_decr.u16.high, -1);
if (icount_enabled() &&
!cpu->can_do_io
&& (mask & ~old_mask) != 0) {
cpu_abort(cpu, "Raised interrupt while not in I/O function");
}
}
}
const CpusAccel tcg_cpus = {
.create_vcpu_thread = tcg_start_vcpu_thread,
.kick_vcpu_thread = tcg_kick_vcpu_thread,
.handle_interrupt = tcg_handle_interrupt,
.get_virtual_clock = tcg_get_virtual_clock,
.get_elapsed_ticks = tcg_get_elapsed_ticks,
};

13
hw/core/cpu.c
View File

@ -35,8 +35,6 @@
#include "qemu/plugin.h"
#include "sysemu/hw_accel.h"
CPUInterruptHandler cpu_interrupt_handler;
CPUState *cpu_by_arch_id(int64_t id)
{
CPUState *cpu;
@ -394,17 +392,6 @@ static vaddr cpu_adjust_watchpoint_address(CPUState *cpu, vaddr addr, int len)
return addr;
}
static void generic_handle_interrupt(CPUState *cpu, int mask)
{
cpu->interrupt_request |= mask;
if (!qemu_cpu_is_self(cpu)) {
qemu_cpu_kick(cpu);
}
}
CPUInterruptHandler cpu_interrupt_handler = generic_handle_interrupt;
static void cpu_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);

14
include/hw/core/cpu.h
View File

@ -844,12 +844,6 @@ bool cpu_exists(int64_t id);
*/
CPUState *cpu_by_arch_id(int64_t id);
#ifndef CONFIG_USER_ONLY
typedef void (*CPUInterruptHandler)(CPUState *, int);
extern CPUInterruptHandler cpu_interrupt_handler;
/**
* cpu_interrupt:
* @cpu: The CPU to set an interrupt on.
@ -857,17 +851,9 @@ extern CPUInterruptHandler cpu_interrupt_handler;
*
* Invokes the interrupt handler.
*/
static inline void cpu_interrupt(CPUState *cpu, int mask)
{
cpu_interrupt_handler(cpu, mask);
}
#else /* USER_ONLY */
void cpu_interrupt(CPUState *cpu, int mask);
#endif /* USER_ONLY */
#ifdef NEED_CPU_H
#ifdef CONFIG_SOFTMMU

2
include/sysemu/cpus.h
View File

@ -16,6 +16,8 @@ typedef struct CpusAccel {
void (*synchronize_state)(CPUState *cpu);
void (*synchronize_pre_loadvm)(CPUState *cpu);
void (*handle_interrupt)(CPUState *cpu, int mask);
int64_t (*get_virtual_clock)(void);
int64_t (*get_elapsed_ticks)(void);
} CpusAccel;

18
softmmu/cpus.c
View File

@ -225,6 +225,24 @@ int64_t cpus_get_elapsed_ticks(void)
return cpu_get_ticks();
}
static void generic_handle_interrupt(CPUState *cpu, int mask)
{
cpu->interrupt_request |= mask;
if (!qemu_cpu_is_self(cpu)) {
qemu_cpu_kick(cpu);
}
}
void cpu_interrupt(CPUState *cpu, int mask)
{
if (cpus_accel->handle_interrupt) {
cpus_accel->handle_interrupt(cpu, mask);
} else {
generic_handle_interrupt(cpu, mask);
}
}
static int do_vm_stop(RunState state, bool send_stop)
{
int ret = 0;

10
target/i386/hax-all.c
View File

@ -297,15 +297,6 @@ int hax_vm_destroy(struct hax_vm *vm)
return 0;
}
static void hax_handle_interrupt(CPUState *cpu, int mask)
{
cpu->interrupt_request |= mask;
if (!qemu_cpu_is_self(cpu)) {
qemu_cpu_kick(cpu);
}
}
static int hax_init(ram_addr_t ram_size, int max_cpus)
{
struct hax_state *hax = NULL;
@ -350,7 +341,6 @@ static int hax_init(ram_addr_t ram_size, int max_cpus)
qversion.cur_version = hax_cur_version;
qversion.min_version = hax_min_version;
hax_notify_qemu_version(hax->vm->fd, &qversion);
cpu_interrupt_handler = hax_handle_interrupt;
return ret;
error:

9
target/i386/hvf/hvf.c
View File

@ -262,14 +262,6 @@ static void update_apic_tpr(CPUState *cpu)
#define VECTORING_INFO_VECTOR_MASK 0xff
static void hvf_handle_interrupt(CPUState * cpu, int mask)
{
cpu->interrupt_request |= mask;
if (!qemu_cpu_is_self(cpu)) {
qemu_cpu_kick(cpu);
}
}
void hvf_handle_io(CPUArchState *env, uint16_t port, void *buffer,
int direction, int size, int count)
{
@ -894,7 +886,6 @@ static int hvf_accel_init(MachineState *ms)
}
hvf_state = s;
cpu_interrupt_handler = hvf_handle_interrupt;
memory_listener_register(&hvf_memory_listener, &address_space_memory);
cpus_register_accel(&hvf_cpus);
return 0;

10
target/i386/whpx-all.c
View File

@ -1488,15 +1488,6 @@ static void whpx_memory_init(void)
memory_listener_register(&whpx_memory_listener, &address_space_memory);
}
static void whpx_handle_interrupt(CPUState *cpu, int mask)
{
cpu->interrupt_request |= mask;
if (!qemu_cpu_is_self(cpu)) {
qemu_cpu_kick(cpu);
}
}
/*
* Load the functions from the given library, using the given handle. If a
* handle is provided, it is used, otherwise the library is opened. The
@ -1651,7 +1642,6 @@ static int whpx_accel_init(MachineState *ms)
whpx_memory_init();
cpu_interrupt_handler = whpx_handle_interrupt;
cpus_register_accel(&whpx_cpus);
printf("Windows Hypervisor Platform accelerator is operational\n");