[PATCH v3 16/62] KVM: VMX: Move enable_ipiv knob to common x86

Sean Christopherson
2025-06-11T22:47:24Z

Move enable_ipiv to common x86 so that it can be reused by SVM to control
IPI virtualization when AVIC is enabled. SVM doesn't actually provide a
way to truly disable IPI virtualization, but KVM can get close enough by
skipping the necessary table programming.

Signed-off-by: Sean Christopherson <seanjc@google.com>
---
arch/x86/include/asm/kvm_host.h | 1 +
arch/x86/kvm/vmx/capabilities.h | 1 -
arch/x86/kvm/vmx/vmx.c | 2 --
arch/x86/kvm/x86.c | 3 +++
4 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index a9b709db7c59..cba82d7a701d 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1950,6 +1950,7 @@ struct kvm_arch_async_pf {
extern u32 __read_mostly kvm_nr_uret_msrs;
extern bool __read_mostly allow_smaller_maxphyaddr;
extern bool __read_mostly enable_apicv;
+extern bool __read_mostly enable_ipiv;
extern bool __read_mostly enable_device_posted_irqs;
extern struct kvm_x86_ops kvm_x86_ops;

diff --git a/arch/x86/kvm/vmx/capabilities.h b/arch/x86/kvm/vmx/capabilities.h
index cb6588238f46..5316c27f6099 100644
--- a/arch/x86/kvm/vmx/capabilities.h
+++ b/arch/x86/kvm/vmx/capabilities.h
@@ -15,7 +15,6 @@ extern bool __read_mostly enable_ept;
extern bool __read_mostly enable_unrestricted_guest;
extern bool __read_mostly enable_ept_ad_bits;
extern bool __read_mostly enable_pml;
-extern bool __read_mostly enable_ipiv;
extern int __read_mostly pt_mode;

#define PT_MODE_SYSTEM 0
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 9ff00ae9f05a..f79604bc0127 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -112,8 +112,6 @@ static bool __read_mostly fasteoi = 1;
module_param(fasteoi, bool, 0444);

module_param(enable_apicv, bool, 0444);
-
-bool __read_mostly enable_ipiv = true;
module_param(enable_ipiv, bool, 0444);

module_param(enable_device_posted_irqs, bool, 0444);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 93711a5ef272..f1b0dbce9a8b 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -226,6 +226,9 @@ EXPORT_SYMBOL_GPL(allow_smaller_maxphyaddr);
bool __read_mostly enable_apicv = true;
EXPORT_SYMBOL_GPL(enable_apicv);

+bool __read_mostly enable_ipiv = true;
+EXPORT_SYMBOL_GPL(enable_ipiv);
+
bool __read_mostly enable_device_posted_irqs = true;
EXPORT_SYMBOL_GPL(enable_device_posted_irqs);

--
2.50.0.rc1.591.g9c95f17f64-goog