From: Wanpeng Li <kernellwp@gmail.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: "Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
"Yunhong Jiang" <yunhong.jiang@intel.com>,
"Wanpeng Li" <wanpeng.li@hotmail.com>
Subject: [PATCH v3 2/5] KVM: LAPIC: guarantee the timer is in tsc-deadline mode
Date: Mon, 24 Oct 2016 18:23:10 +0800 [thread overview]
Message-ID: <1477304593-3453-3-git-send-email-wanpeng.li@hotmail.com> (raw)
In-Reply-To: <1477304593-3453-1-git-send-email-wanpeng.li@hotmail.com>
From: Wanpeng Li <wanpeng.li@hotmail.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
rdmsr MSR_IA32_TSCDEADLINE.
Suggested-by: Radim Krčmář <rkrcmar@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Yunhong Jiang <yunhong.jiang@intel.com>
Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
---
arch/x86/kvm/lapic.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index dad743e..dce6c0b 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1711,8 +1711,8 @@ u64 kvm_get_lapic_tscdeadline_msr(struct kvm_vcpu *vcpu)
{
struct kvm_lapic *apic = vcpu->arch.apic;
- if (!lapic_in_kernel(vcpu) || apic_lvtt_oneshot(apic) ||
- apic_lvtt_period(apic))
+ if (!lapic_in_kernel(vcpu) ||
+ !apic_lvtt_tscdeadline(apic))
return 0;
return apic->lapic_timer.tscdeadline;
--
1.9.1
next prev parent reply other threads:[~2016-10-24 10:23 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-24 10:23 [PATCH v3 0/5] KVM: LAPIC: Add APIC Timer periodic/oneshot mode VMX preemption timer support Wanpeng Li
2016-10-24 10:23 ` [PATCH v3 1/5] KVM: LAPIC: extract start_sw_period() to handle periodic/oneshot mode Wanpeng Li
2016-10-24 10:23 ` Wanpeng Li [this message]
2016-10-24 10:23 ` [PATCH v3 3/5] KVM: LAPIC: introduce kvm_get_lapic_target_expiration_tsc() Wanpeng Li
2016-10-24 10:23 ` [PATCH v3 4/5] KVM: LAPIC: rename start/cancel_hv_tscdeadline to start/cancel_hv_timer Wanpeng Li
2016-10-24 10:23 ` [PATCH v3 5/5] KVM: LAPIC: add APIC Timer periodic/oneshot mode VMX preemption timer support Wanpeng Li
2016-10-24 14:50 ` Radim Krčmář
2016-10-24 23:33 ` Wanpeng Li
2016-10-24 15:03 ` [PATCH 6/5] KVM: x86: fix periodic lapic timer with hrtimers Radim Krčmář
2016-10-24 15:09 ` Paolo Bonzini
2016-10-24 15:27 ` Radim Krčmář
2016-10-24 23:39 ` Wanpeng Li
2016-10-25 11:43 ` Radim Krčmář
2016-10-25 11:55 ` Paolo Bonzini
2016-10-26 6:02 ` Wanpeng Li
2016-10-26 6:08 ` Wanpeng Li
2016-10-26 14:01 ` Radim Krčmář
2016-10-27 2:33 ` Wanpeng Li
2016-10-26 13:32 ` Radim Krčmář
2016-10-27 2:11 ` Wanpeng Li
2016-10-26 10:23 ` Wanpeng Li
2016-10-26 11:15 ` Paolo Bonzini
2016-10-26 11:26 ` Wanpeng Li
[not found] ` <SG2PR02MB1550E0FF04F2614BE0E262BC80A80@SG2PR02MB1550.apcprd02.prod.outlook.com>
2016-10-25 13:03 ` Radim Krčmář
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