linux-kernel - [PATCH 21/32] KVM: VMX: Enable APIC timer virtualization

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Message-ID: <0107fa9de9ad238a7b1c8d8207e93f8d2e61615d.1770116051.git.isaku.yamahata@intel.com>
Date: Tue,  3 Feb 2026 10:17:04 -0800
From: isaku.yamahata@...el.com
To: kvm@...r.kernel.org
Cc: isaku.yamahata@...el.com,
	isaku.yamahata@...il.com,
	Paolo Bonzini <pbonzini@...hat.com>,
	Sean Christopherson <seanjc@...gle.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 21/32] KVM: VMX: Enable APIC timer virtualization

From: Isaku Yamahata <isaku.yamahata@...el.com>

Add TERTIARY_EXEC_GUEST_APIC_TIMER bit to
KVM_OPTIONAL_VMX_TERTIARY_VM_EXEC_CONTROL as optional feature as the
supporting logic is implemented.

Signed-off-by: Isaku Yamahata <isaku.yamahata@...el.com>
---
 arch/x86/kvm/vmx/vmx.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index bdeef2e12640..b296950d855e 100644
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -588,9 +588,9 @@ static inline u8 vmx_get_rvi(void)
 	 SECONDARY_EXEC_EPT_VIOLATION_VE)
 
 #define KVM_REQUIRED_VMX_TERTIARY_VM_EXEC_CONTROL 0
-/* Once apic timer virtualization supported, add TERTIARY_EXEC_GUEST_APIC_TIMER */
 #define KVM_OPTIONAL_VMX_TERTIARY_VM_EXEC_CONTROL			\
-	(TERTIARY_EXEC_IPI_VIRT)
+	(TERTIARY_EXEC_IPI_VIRT |					\
+	 TERTIARY_EXEC_GUEST_APIC_TIMER)
 
 #define BUILD_CONTROLS_SHADOW(lname, uname, bits)						\
 static inline void lname##_controls_set(struct vcpu_vmx *vmx, u##bits val)			\
-- 
2.45.2