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From: Wanpeng Li <kernellwp@gmail.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
	Sean Christopherson <seanjc@google.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>
Subject: [PATCH v2 3/3] KVM: X86: Let's harden the ipi fastpath condition edge-trigger mode
Date: Mon,  7 Jun 2021 00:19:45 -0700	[thread overview]
Message-ID: <1623050385-100988-3-git-send-email-wanpengli@tencent.com> (raw)
In-Reply-To: <1623050385-100988-1-git-send-email-wanpengli@tencent.com>

From: Wanpeng Li <wanpengli@tencent.com>

Let's harden the ipi fastpath condition edge-trigger mode.

Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
---
 arch/x86/kvm/x86.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index b594275..dbd3e9d 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1922,6 +1922,7 @@ static int handle_fastpath_set_x2apic_icr_irqoff(struct kvm_vcpu *vcpu, u64 data
 		return 1;
 
 	if (((data & APIC_SHORT_MASK) == APIC_DEST_NOSHORT) &&
+		((data & APIC_INT_LEVELTRIG) == 0) &&
 		((data & APIC_DEST_MASK) == APIC_DEST_PHYSICAL) &&
 		((data & APIC_MODE_MASK) == APIC_DM_FIXED) &&
 		((u32)(data >> 32) != X2APIC_BROADCAST)) {
-- 
2.7.4


  parent reply	other threads:[~2021-06-07  7:21 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-07  7:19 [PATCH v2 1/3] KVM: LAPIC: Write 0 to TMICT should also cancel vmx-preemption timer Wanpeng Li
2021-06-07  7:19 ` [PATCH v2 2/3] KVM: LAPIC: Reset TMCCT during vCPU reset Wanpeng Li
2021-06-08 16:27   ` Paolo Bonzini
2021-06-09  2:15     ` Wanpeng Li
2021-06-09  5:51       ` Paolo Bonzini
2021-06-09  7:18         ` Wanpeng Li
2021-06-07  7:19 ` Wanpeng Li [this message]
2021-06-08 16:27   ` [PATCH v2 3/3] KVM: X86: Let's harden the ipi fastpath condition edge-trigger mode Paolo Bonzini
2021-06-08 16:35   ` Sean Christopherson
2021-06-08 17:40     ` Paolo Bonzini
2021-06-09  2:08     ` Wanpeng Li
2021-06-08 16:27 ` [PATCH v2 1/3] KVM: LAPIC: Write 0 to TMICT should also cancel vmx-preemption timer Paolo Bonzini

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