* [PATCH v3 1/3] KVM: LAPIC: Prevent setting the tscdeadline timer if the lapic is hw disabled
@ 2020-07-31 3:12 Wanpeng Li
2020-07-31 7:18 ` Paolo Bonzini
0 siblings, 1 reply; 2+ messages in thread
From: Wanpeng Li @ 2020-07-31 3:12 UTC (permalink / raw)
To: linux-kernel, kvm
Cc: Paolo Bonzini, Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li,
Jim Mattson, Joerg Roedel, stable
From: Wanpeng Li <wanpengli@tencent.com>
Prevent setting the tscdeadline timer if the lapic is hw disabled.
Fixes: bce87cce88 (KVM: x86: consolidate different ways to test for in-kernel LAPIC)
Cc: <stable@vger.kernel.org>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
---
v1 -> v2:
* add Fixes tag and cc stable
arch/x86/kvm/lapic.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 5bf72fc..4ce2ddd 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -2195,7 +2195,7 @@ void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data)
{
struct kvm_lapic *apic = vcpu->arch.apic;
- if (!lapic_in_kernel(vcpu) || apic_lvtt_oneshot(apic) ||
+ if (!kvm_apic_present(vcpu) || apic_lvtt_oneshot(apic) ||
apic_lvtt_period(apic))
return;
--
2.7.4
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH v3 1/3] KVM: LAPIC: Prevent setting the tscdeadline timer if the lapic is hw disabled
2020-07-31 3:12 [PATCH v3 1/3] KVM: LAPIC: Prevent setting the tscdeadline timer if the lapic is hw disabled Wanpeng Li
@ 2020-07-31 7:18 ` Paolo Bonzini
0 siblings, 0 replies; 2+ messages in thread
From: Paolo Bonzini @ 2020-07-31 7:18 UTC (permalink / raw)
To: Wanpeng Li, linux-kernel, kvm
Cc: Sean Christopherson, Vitaly Kuznetsov, Wanpeng Li, Jim Mattson,
Joerg Roedel, stable
On 31/07/20 05:12, Wanpeng Li wrote:
> From: Wanpeng Li <wanpengli@tencent.com>
>
> Prevent setting the tscdeadline timer if the lapic is hw disabled.
>
> Fixes: bce87cce88 (KVM: x86: consolidate different ways to test for in-kernel LAPIC)
> Cc: <stable@vger.kernel.org>
> Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
> ---
> v1 -> v2:
> * add Fixes tag and cc stable
>
> arch/x86/kvm/lapic.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
> index 5bf72fc..4ce2ddd 100644
> --- a/arch/x86/kvm/lapic.c
> +++ b/arch/x86/kvm/lapic.c
> @@ -2195,7 +2195,7 @@ void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data)
> {
> struct kvm_lapic *apic = vcpu->arch.apic;
>
> - if (!lapic_in_kernel(vcpu) || apic_lvtt_oneshot(apic) ||
> + if (!kvm_apic_present(vcpu) || apic_lvtt_oneshot(apic) ||
> apic_lvtt_period(apic))
> return;
>
>
Testcase please.
Paolo
^ permalink raw reply [flat|nested] 2+ messages in thread
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