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kvm: support TSC deadline MSR with subsection

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KVM add emulation of lapic tsc deadline timer for guest.
This patch is co-operation work at qemu side.

Use subsections to save/restore the field (mtosatti).

Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Liu, Jinsong 2011-10-05 16:52:32 -03:00 • committed by Marcelo Tosatti
parent 38d2c27ea6
commit aa82ba549a
3 changed files with 37 additions and 0 deletions
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14
target-i386/kvm.c
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@ -59,6 +59,7 @@ const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
static bool has_msr_star;
static bool has_msr_hsave_pa;
static bool has_msr_tsc_deadline;
static bool has_msr_async_pf_en;
static int lm_capable_kernel;
@ -568,6 +569,10 @@ static int kvm_get_supported_msrs(KVMState *s)
has_msr_hsave_pa = true;
continue;
}
if (kvm_msr_list->indices[i] == MSR_IA32_TSCDEADLINE) {
has_msr_tsc_deadline = true;
continue;
}
}
}
@ -881,6 +886,9 @@ static int kvm_put_msrs(CPUState *env, int level)
if (has_msr_hsave_pa) {
kvm_msr_entry_set(&msrs[n++], MSR_VM_HSAVE_PA, env->vm_hsave);
}
if (has_msr_tsc_deadline) {
kvm_msr_entry_set(&msrs[n++], MSR_IA32_TSCDEADLINE, env->tsc_deadline);
}
#ifdef TARGET_X86_64
if (lm_capable_kernel) {
kvm_msr_entry_set(&msrs[n++], MSR_CSTAR, env->cstar);
@ -1127,6 +1135,9 @@ static int kvm_get_msrs(CPUState *env)
if (has_msr_hsave_pa) {
msrs[n++].index = MSR_VM_HSAVE_PA;
}
if (has_msr_tsc_deadline) {
msrs[n++].index = MSR_IA32_TSCDEADLINE;
}
if (!env->tsc_valid) {
msrs[n++].index = MSR_IA32_TSC;
@ -1195,6 +1206,9 @@ static int kvm_get_msrs(CPUState *env)
case MSR_IA32_TSC:
env->tsc = msrs[i].data;
break;
case MSR_IA32_TSCDEADLINE:
env->tsc_deadline = msrs[i].data;
break;
case MSR_VM_HSAVE_PA:
env->vm_hsave = msrs[i].data;
break;