lkml.org 
[lkml]   [2020]   [Aug]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v2 2/2] KVM: LAPIC: Guarantee the timer is in tsc-deadline mode when setting
Date
From: Wanpeng Li <wanpengli@tencent.com>

Check apic_lvtt_tscdeadline() mode directly instead of apic_lvtt_oneshot()
and apic_lvtt_period() to guarantee the timer is in tsc-deadline mode when
wrmsr MSR_IA32_TSCDEADLINE.

Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
---
v1 -> v2:
* fix indentation

arch/x86/kvm/lapic.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 79599af..abaf48e 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -2193,8 +2193,7 @@ void kvm_set_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu, u64 data)
{
struct kvm_lapic *apic = vcpu->arch.apic;

- if (!kvm_apic_present(vcpu) || apic_lvtt_oneshot(apic) ||
- apic_lvtt_period(apic))
+ if (!kvm_apic_present(vcpu) || !apic_lvtt_tscdeadline(apic))
return;

hrtimer_cancel(&apic->lapic_timer.timer);
--
2.7.4
\
 
 \ /
  Last update: 2020-08-12 08:32    [W:0.111 / U:3.776 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site