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[1/3] KVM: VMX: Use precomputed MAXPHYADDR for RTIT base MSR check

Message ID 20200716034408.6342-2-sean.j.christopherson@intel.com (mailing list archive)
State New, archived
Headers show
Series KVM: VMX: Clean up RTIT MAXPHYADDR usage | expand

Commit Message

Sean Christopherson July 16, 2020, 3:44 a.m. UTC
Use cpuid_maxphyaddr() instead of cpuid_query_maxphyaddr() for the
RTIT base MSR check.  There is no reason to recompute MAXPHYADDR as the
precomputed version is synchronized with CPUID updates, and
MSR_IA32_RTIT_OUTPUT_BASE is not written between stuffing CPUID and
refreshing vcpu->arch.maxphyaddr.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/kvm/vmx/vmx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 1bb59ae5016dc..50b7e85d37352 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -146,7 +146,7 @@  module_param_named(preemption_timer, enable_preemption_timer, bool, S_IRUGO);
 	RTIT_STATUS_BYTECNT))
 
 #define MSR_IA32_RTIT_OUTPUT_BASE_MASK \
-	(~((1UL << cpuid_query_maxphyaddr(vcpu)) - 1) | 0x7f)
+	(~((1UL << cpuid_maxphyaddr(vcpu)) - 1) | 0x7f)
 
 /*
  * These 2 parameters are used to config the controls for Pause-Loop Exiting: