diff mbox series

[v3,1/2] KVM: nVMX: use vmx_segment_cache_clear

Message ID 20240725175232.337266-2-mlevitsk@redhat.com (mailing list archive)
State New, archived
Headers show
Series Fix for a very old KVM bug in the segment cache | expand

Commit Message

Maxim Levitsky July 25, 2024, 5:52 p.m. UTC 
in prepare_vmcs02_rare, call vmx_segment_cache_clear instead
of setting segment_cache.bitmask directly.

No functional change intended.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
---
 arch/x86/kvm/vmx/nested.c | 3 ++-
 arch/x86/kvm/vmx/vmx.c    | 4 ----
 arch/x86/kvm/vmx/vmx.h    | 5 +++++
 3 files changed, 7 insertions(+), 5 deletions(-)
diff mbox series

Patch

diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c
index 643935a0f70a..b0e5d80da941 100644
--- a/arch/x86/kvm/vmx/nested.c
+++ b/arch/x86/kvm/vmx/nested.c
@@ -2469,6 +2469,7 @@  static void prepare_vmcs02_rare(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12)
 
 	if (!hv_evmcs || !(hv_evmcs->hv_clean_fields &
 			   HV_VMX_ENLIGHTENED_CLEAN_FIELD_GUEST_GRP2)) {
+
 		vmcs_write16(GUEST_ES_SELECTOR, vmcs12->guest_es_selector);
 		vmcs_write16(GUEST_CS_SELECTOR, vmcs12->guest_cs_selector);
 		vmcs_write16(GUEST_SS_SELECTOR, vmcs12->guest_ss_selector);
@@ -2506,7 +2507,7 @@  static void prepare_vmcs02_rare(struct vcpu_vmx *vmx, struct vmcs12 *vmcs12)
 		vmcs_writel(GUEST_GDTR_BASE, vmcs12->guest_gdtr_base);
 		vmcs_writel(GUEST_IDTR_BASE, vmcs12->guest_idtr_base);
 
-		vmx->segment_cache.bitmask = 0;
+		vmx_segment_cache_clear(vmx);
 	}
 
 	if (!hv_evmcs || !(hv_evmcs->hv_clean_fields &
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index b3c83c06f826..fa9f307d9b18 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -524,10 +524,6 @@  static const struct kvm_vmx_segment_field {
 	VMX_SEGMENT_FIELD(LDTR),
 };
 
-static inline void vmx_segment_cache_clear(struct vcpu_vmx *vmx)
-{
-	vmx->segment_cache.bitmask = 0;
-}
 
 static unsigned long host_idt_base;
 
diff --git a/arch/x86/kvm/vmx/vmx.h b/arch/x86/kvm/vmx/vmx.h
index 7b64e271a931..1689f0d59f43 100644
--- a/arch/x86/kvm/vmx/vmx.h
+++ b/arch/x86/kvm/vmx/vmx.h
@@ -755,4 +755,9 @@  static inline bool vmx_can_use_ipiv(struct kvm_vcpu *vcpu)
 	return  lapic_in_kernel(vcpu) && enable_ipiv;
 }
 
+static inline void vmx_segment_cache_clear(struct vcpu_vmx *vmx)
+{
+	vmx->segment_cache.bitmask = 0;
+}
+
 #endif /* __KVM_X86_VMX_H */