xemu-project/xemu
1
0
Fork 0
mirror of https://github.com/xemu-project/xemu.git synced 2024-11-23 19:49:43 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

kvm: x86: Save/restore KVM-specific CPU states

Browse Source 
Save and restore all so far neglected KVM-specific CPU states. Handling
the TSC stabilizes migration in KVM mode. The interrupt_bitmap and
mp_state are currently unused, but will become relevant for in-kernel
irqchip support. By including proper saving/restoring already, we avoid
having to increment CPU_SAVE_VERSION later on once again.

v2:
 - initialize mp_state runnable (for the boot CPU)

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 2009-05-02 02:18:38 +02:00 committed by Anthony Liguori
parent d33a1810d7
commit f8d926e9cd
5 changed files with 49 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
kvm-all.c
View File

@ -181,6 +181,26 @@ err:
return ret;
}
int kvm_put_mp_state(CPUState *env)
{
struct kvm_mp_state mp_state = { .mp_state = env->mp_state };
return kvm_vcpu_ioctl(env, KVM_SET_MP_STATE, &mp_state);
}
int kvm_get_mp_state(CPUState *env)
{
struct kvm_mp_state mp_state;
int ret;
ret = kvm_vcpu_ioctl(env, KVM_GET_MP_STATE, &mp_state);
if (ret < 0) {
return ret;
}
env->mp_state = mp_state.mp_state;
return 0;
}
int kvm_sync_vcpus(void)
{
CPUState *env;

3
kvm.h
View File

@ -72,6 +72,9 @@ int kvm_vm_ioctl(KVMState *s, int type, ...);
int kvm_vcpu_ioctl(CPUState *env, int type, ...);
int kvm_get_mp_state(CPUState *env);
int kvm_put_mp_state(CPUState *env);
/* Arch specific hooks */
int kvm_arch_post_run(CPUState *env, struct kvm_run *run);

3
target-i386/cpu.h
View File

@ -669,6 +669,7 @@ typedef struct CPUX86State {
/* For KVM */
uint64_t interrupt_bitmap[256 / 64];
uint32_t mp_state;
/* in order to simplify APIC support, we leave this pointer to the
user */
@ -837,7 +838,7 @@ static inline int cpu_get_time_fast(void)
#define cpu_signal_handler cpu_x86_signal_handler
#define cpu_list x86_cpu_list
#define CPU_SAVE_VERSION 8
#define CPU_SAVE_VERSION 9
/* MMU modes definitions */
#define MMU_MODE0_SUFFIX _kernel

10
target-i386/kvm.c
View File

@ -126,6 +126,8 @@ int kvm_arch_init_vcpu(CPUState *env)
uint32_t limit, i, j, cpuid_i;
uint32_t unused;
env->mp_state = KVM_MP_STATE_RUNNABLE;
cpuid_i = 0;
cpu_x86_cpuid(env, 0, 0, &limit, &unused, &unused, &unused);
@ -648,6 +650,14 @@ int kvm_arch_put_registers(CPUState *env)
if (ret < 0)
return ret;
ret = kvm_put_mp_state(env);
if (ret < 0)
return ret;
ret = kvm_get_mp_state(env);
if (ret < 0)
return ret;
return 0;
}

16
target-i386/machine.c
View File

@ -140,6 +140,12 @@ void cpu_save(QEMUFile *f, void *opaque)
qemu_put_be64s(f, &env->mtrr_var[i].base);
qemu_put_be64s(f, &env->mtrr_var[i].mask);
}
for (i = 0; i < sizeof(env->interrupt_bitmap)/8; i++) {
qemu_put_be64s(f, &env->interrupt_bitmap[i]);
}
qemu_put_be64s(f, &env->tsc);
qemu_put_be32s(f, &env->mp_state);
}
#ifdef USE_X86LDOUBLE
@ -174,8 +180,7 @@ int cpu_load(QEMUFile *f, void *opaque, int version_id)
uint16_t fpus, fpuc, fptag, fpregs_format;
int32_t a20_mask;
if (version_id != 3 && version_id != 4 && version_id != 5
&& version_id != 6 && version_id != 7 && version_id != 8)
if (version_id < 3 || version_id > CPU_SAVE_VERSION)
return -EINVAL;
for(i = 0; i < CPU_NB_REGS; i++)
qemu_get_betls(f, &env->regs[i]);
@ -319,6 +324,13 @@ int cpu_load(QEMUFile *f, void *opaque, int version_id)
qemu_get_be64s(f, &env->mtrr_var[i].mask);
}
}
if (version_id >= 9) {
for (i = 0; i < sizeof(env->interrupt_bitmap)/8; i++) {
qemu_get_be64s(f, &env->interrupt_bitmap[i]);
}
qemu_get_be64s(f, &env->tsc);
qemu_get_be32s(f, &env->mp_state);
}
/* XXX: ensure compatiblity for halted bit ? */
/* XXX: compute redundant hflags bits */