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| author | Marcelo Tosatti <mtosatti@redhat.com> | 2013-02-19 23:27:20 -0300 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2013-04-17 23:27:24 -0300 |
| commit | 917367aa968fd4fef29d340e0c7ec8c608dffaab (patch) | |
| tree | e3d7ad3f079a695f4389c41a29a31106f3aa43ee | |
| parent | 614413f7f9a88d97ab40ecabd1c7920fb288f820 (diff) | |
| download | qemu-917367aa968fd4fef29d340e0c7ec8c608dffaab.zip qemu-917367aa968fd4fef29d340e0c7ec8c608dffaab.tar.gz qemu-917367aa968fd4fef29d340e0c7ec8c608dffaab.tar.bz2 | |
target-i386: kvm: save/restore steal time MSR
Read and write steal time MSR, so that reporting is functional across
migration.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
| -rw-r--r-- | target-i386/cpu.h | 1 | ||||
| -rw-r--r-- | target-i386/kvm.c | 13 | ||||
| -rw-r--r-- | target-i386/machine.c | 21 |
3 files changed, 35 insertions, 0 deletions
diff --git a/target-i386/cpu.h b/target-i386/cpu.h index cf1b05c..a1614e8 100644 --- a/target-i386/cpu.h +++ b/target-i386/cpu.h @@ -803,6 +803,7 @@ typedef struct CPUX86State { #endif uint64_t system_time_msr; uint64_t wall_clock_msr; + uint64_t steal_time_msr; uint64_t async_pf_en_msr; uint64_t pv_eoi_en_msr; diff --git a/target-i386/kvm.c b/target-i386/kvm.c index 397afeb..0e7cc81 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -68,6 +68,7 @@ static bool has_msr_tsc_deadline; static bool has_msr_async_pf_en; static bool has_msr_pv_eoi_en; static bool has_msr_misc_enable; +static bool has_msr_kvm_steal_time; static int lm_capable_kernel; bool kvm_allows_irq0_override(void) @@ -507,6 +508,8 @@ int kvm_arch_init_vcpu(CPUState *cs) has_msr_pv_eoi_en = c->eax & (1 << KVM_FEATURE_PV_EOI); + has_msr_kvm_steal_time = c->eax & (1 << KVM_FEATURE_STEAL_TIME); + cpu_x86_cpuid(env, 0, 0, &limit, &unused, &unused, &unused); for (i = 0; i <= limit; i++) { @@ -1107,6 +1110,10 @@ static int kvm_put_msrs(X86CPU *cpu, int level) kvm_msr_entry_set(&msrs[n++], MSR_KVM_PV_EOI_EN, env->pv_eoi_en_msr); } + if (has_msr_kvm_steal_time) { + kvm_msr_entry_set(&msrs[n++], MSR_KVM_STEAL_TIME, + env->steal_time_msr); + } if (hyperv_hypercall_available()) { kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_GUEST_OS_ID, 0); kvm_msr_entry_set(&msrs[n++], HV_X64_MSR_HYPERCALL, 0); @@ -1360,6 +1367,9 @@ static int kvm_get_msrs(X86CPU *cpu) if (has_msr_pv_eoi_en) { msrs[n++].index = MSR_KVM_PV_EOI_EN; } + if (has_msr_kvm_steal_time) { + msrs[n++].index = MSR_KVM_STEAL_TIME; + } if (env->mcg_cap) { msrs[n++].index = MSR_MCG_STATUS; @@ -1445,6 +1455,9 @@ static int kvm_get_msrs(X86CPU *cpu) case MSR_KVM_PV_EOI_EN: env->pv_eoi_en_msr = msrs[i].data; break; + case MSR_KVM_STEAL_TIME: + env->steal_time_msr = msrs[i].data; + break; } } diff --git a/target-i386/machine.c b/target-i386/machine.c index ee85e57..3659db9 100644 --- a/target-i386/machine.c +++ b/target-i386/machine.c @@ -292,6 +292,24 @@ static bool pv_eoi_msr_needed(void *opaque) return cpu->env.pv_eoi_en_msr != 0; } +static bool steal_time_msr_needed(void *opaque) +{ + CPUX86State *cpu = opaque; + + return cpu->steal_time_msr != 0; +} + +static const VMStateDescription vmstate_steal_time_msr = { + .name = "cpu/steal_time_msr", + .version_id = 1, + .minimum_version_id = 1, + .minimum_version_id_old = 1, + .fields = (VMStateField []) { + VMSTATE_UINT64(steal_time_msr, CPUX86State), + VMSTATE_END_OF_LIST() + } +}; + static const VMStateDescription vmstate_async_pf_msr = { .name = "cpu/async_pf_msr", .version_id = 1, @@ -503,6 +521,9 @@ const VMStateDescription vmstate_x86_cpu = { .vmsd = &vmstate_pv_eoi_msr, .needed = pv_eoi_msr_needed, } , { + .vmsd = &vmstate_steal_time_msr, + .needed = steal_time_msr_needed, + } , { .vmsd = &vmstate_fpop_ip_dp, .needed = fpop_ip_dp_needed, }, { |