From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Cc: jmattson@google.com
Subject: [PATCH] KVM: nVMX: remove unnecessary vmwrite from L2->L1 vmexit
Date: Mon, 1 Jan 2018 23:58:15 +0100 [thread overview]
Message-ID: <1514847495-29681-1-git-send-email-pbonzini@redhat.com> (raw)
The POSTED_INTR_NV field is constant (though it differs between the vmcs01 and
vmcs02), there is no need to reload it on vmexit to L1.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
arch/x86/kvm/vmx.c | 3 ---
1 file changed, 3 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index e6223fe8faa1..1e184830a295 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -11610,9 +11610,6 @@ static void load_vmcs12_host_state(struct kvm_vcpu *vcpu,
*/
vmx_flush_tlb(vcpu, true);
}
- /* Restore posted intr vector. */
- if (nested_cpu_has_posted_intr(vmcs12))
- vmcs_write16(POSTED_INTR_NV, POSTED_INTR_VECTOR);
vmcs_write32(GUEST_SYSENTER_CS, vmcs12->host_ia32_sysenter_cs);
vmcs_writel(GUEST_SYSENTER_ESP, vmcs12->host_ia32_sysenter_esp);
--
1.8.3.1
next reply other threads:[~2018-01-01 22:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-01 22:58 Paolo Bonzini [this message]
2018-01-02 0:45 ` [PATCH] KVM: nVMX: remove unnecessary vmwrite from L2->L1 vmexit Jim Mattson
2018-01-02 9:47 ` Liran Alon
2018-01-03 6:32 ` Quan Xu
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