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kvm: x86: Refactor use of interrupt_bitmap

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Drop interrupt_bitmap from the cpustate and solely rely on the integer
interupt_injected. This prepares us for the new injected-interrupt
interface, which will deprecate the bitmap, while preserving
compatibility.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Jan Kiszka 2009-11-06 19:39:24 +01:00 committed by Anthony Liguori
parent caa5af0ff3
commit 0e607a80d3
3 changed files with 21 additions and 31 deletions
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3
target-i386/cpu.h
View File

@ -691,8 +691,8 @@ typedef struct CPUX86State {
MTRRVar mtrr_var[8];
/* For KVM */
uint64_t interrupt_bitmap[256 / 64];
uint32_t mp_state;
int32_t interrupt_injected;
/* in order to simplify APIC support, we leave this pointer to the
user */
@ -709,7 +709,6 @@ typedef struct CPUX86State {
uint16_t fpus_vmstate;
uint16_t fptag_vmstate;
uint16_t fpregs_format_vmstate;
int32_t pending_irq_vmstate;
} CPUX86State;
CPUX86State *cpu_x86_init(const char *cpu_model);

25
target-i386/kvm.c
View File

@ -23,6 +23,7 @@
#include "kvm.h"
#include "cpu.h"
#include "gdbstub.h"
#include "host-utils.h"
//#define DEBUG_KVM
@ -223,6 +224,7 @@ int kvm_arch_init_vcpu(CPUState *env)
void kvm_arch_reset_vcpu(CPUState *env)
{
env->interrupt_injected = -1;
}
static int kvm_has_msr_star(CPUState *env)
@ -411,9 +413,11 @@ static int kvm_put_sregs(CPUState *env)
{
struct kvm_sregs sregs;
memcpy(sregs.interrupt_bitmap,
env->interrupt_bitmap,
sizeof(sregs.interrupt_bitmap));
memset(sregs.interrupt_bitmap, 0, sizeof(sregs.interrupt_bitmap));
if (env->interrupt_injected >= 0) {
sregs.interrupt_bitmap[env->interrupt_injected / 64] |=
(uint64_t)1 << (env->interrupt_injected % 64);
}
if ((env->eflags & VM_MASK)) {
set_v8086_seg(&sregs.cs, &env->segs[R_CS]);
@ -520,15 +524,22 @@ static int kvm_get_sregs(CPUState *env)
{
struct kvm_sregs sregs;
uint32_t hflags;
int ret;
int bit, i, ret;
ret = kvm_vcpu_ioctl(env, KVM_GET_SREGS, &sregs);
if (ret < 0)
return ret;
memcpy(env->interrupt_bitmap,
sregs.interrupt_bitmap,
sizeof(sregs.interrupt_bitmap));
/* There can only be one pending IRQ set in the bitmap at a time, so try
to find it and save its number instead (-1 for none). */
env->interrupt_injected = -1;
for (i = 0; i < ARRAY_SIZE(sregs.interrupt_bitmap); i++) {
if (sregs.interrupt_bitmap[i]) {
bit = ctz64(sregs.interrupt_bitmap[i]);
env->interrupt_injected = i * 64 + bit;
break;
}
}
get_seg(&env->segs[R_CS], &sregs.cs);
get_seg(&env->segs[R_DS], &sregs.ds);

24
target-i386/machine.c
View File

@ -2,7 +2,6 @@
#include "hw/boards.h"
#include "hw/pc.h"
#include "hw/isa.h"
#include "host-utils.h"
#include "exec-all.h"
#include "kvm.h"
@ -320,7 +319,7 @@ static const VMStateInfo vmstate_hack_uint64_as_uint32 = {
static void cpu_pre_save(void *opaque)
{
CPUState *env = opaque;
int i, bit;
int i;
cpu_synchronize_state(env);
@ -336,17 +335,6 @@ static void cpu_pre_save(void *opaque)
#else
env->fpregs_format_vmstate = 1;
#endif
/* There can only be one pending IRQ set in the bitmap at a time, so try
to find it and save its number instead (-1 for none). */
env->pending_irq_vmstate = -1;
for (i = 0; i < ARRAY_SIZE(env->interrupt_bitmap); i++) {
if (env->interrupt_bitmap[i]) {
bit = ctz64(env->interrupt_bitmap[i]);
env->pending_irq_vmstate = i * 64 + bit;
break;
}
}
}
static int cpu_pre_load(void *opaque)
@ -375,14 +363,6 @@ static int cpu_post_load(void *opaque, int version_id)
for (i = 0; i < 4; i++)
hw_breakpoint_insert(env, i);
if (version_id >= 9) {
memset(&env->interrupt_bitmap, 0, sizeof(env->interrupt_bitmap));
if (env->pending_irq_vmstate >= 0) {
env->interrupt_bitmap[env->pending_irq_vmstate / 64] |=
(uint64_t)1 << (env->pending_irq_vmstate % 64);
}
}
tlb_flush(env, 1);
return 0;
}
@ -465,7 +445,7 @@ static const VMStateDescription vmstate_cpu = {
VMSTATE_UINT64_V(mtrr_deftype, CPUState, 8),
VMSTATE_MTRR_VARS(mtrr_var, CPUState, 8, 8),
/* KVM-related states */
VMSTATE_INT32_V(pending_irq_vmstate, CPUState, 9),
VMSTATE_INT32_V(interrupt_injected, CPUState, 9),
VMSTATE_UINT32_V(mp_state, CPUState, 9),
VMSTATE_UINT64_V(tsc, CPUState, 9),
/* MCE */