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KVM: X86: Add KVM_VCPU_PREEMPTED

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The next patch will add another bit to the preempted field in
kvm_steal_time.  Define a constant for bit 0 (the only one that is
currently used).

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
This commit is contained in:
Wanpeng Li 2017-12-12 17:33:01 -08:00 committed by Radim Krčmář
parent 5cb0944c0c
commit fa55eedd63
3 changed files with 4 additions and 2 deletions
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2
arch/x86/include/uapi/asm/kvm_para.h
View File

@ -51,6 +51,8 @@ struct kvm_steal_time {
__u32 pad[11];
};
#define KVM_VCPU_PREEMPTED (1 << 0)
#define KVM_CLOCK_PAIRING_WALLCLOCK 0
struct kvm_clock_pairing {
__s64 sec;

2
arch/x86/kernel/kvm.c
View File

@ -643,7 +643,7 @@ __visible bool __kvm_vcpu_is_preempted(long cpu)
{
struct kvm_steal_time *src = &per_cpu(steal_time, cpu);
return !!src->preempted;
return !!(src->preempted & KVM_VCPU_PREEMPTED);
}
PV_CALLEE_SAVE_REGS_THUNK(__kvm_vcpu_is_preempted);

2
arch/x86/kvm/x86.c
View File

@ -2916,7 +2916,7 @@ static void kvm_steal_time_set_preempted(struct kvm_vcpu *vcpu)
if (!(vcpu->arch.st.msr_val & KVM_MSR_ENABLED))
return;
vcpu->arch.st.steal.preempted = 1;
vcpu->arch.st.steal.preempted = KVM_VCPU_PREEMPTED;
kvm_write_guest_offset_cached(vcpu->kvm, &vcpu->arch.st.stime,
&vcpu->arch.st.steal.preempted,