From: Paolo Bonzini <pbonzini@redhat.com>
To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Subject: [PATCH] KVM: VMX: clear vmx_x86_ops.sync_pir_to_irr if APICv is disabled
Date: Tue, 30 Nov 2021 07:37:46 -0500 [thread overview]
Message-ID: <20211130123746.293379-2-pbonzini@redhat.com> (raw)
There is nothing to synchronize if APICv is disabled, since neither
other vCPUs nor assigned devices can set PIR.ON.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
arch/x86/kvm/vmx/vmx.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index ca1fd93c1dc9..9453743ce0c4 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7778,10 +7778,10 @@ static __init int hardware_setup(void)
ple_window_shrink = 0;
}
- if (!cpu_has_vmx_apicv()) {
+ if (!cpu_has_vmx_apicv())
enable_apicv = 0;
+ if (!enable_apicv)
vmx_x86_ops.sync_pir_to_irr = NULL;
- }
if (cpu_has_vmx_tsc_scaling()) {
kvm_has_tsc_control = true;
--
2.31.1
next reply other threads:[~2021-11-30 12:38 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-30 12:37 Paolo Bonzini [this message]
2021-11-30 20:32 ` Sean Christopherson
2021-11-30 21:09 ` Maxim Levitsky
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