Commit 8d921acf authored Sep 24, 2020 by Sean Christopherson Committed by Paolo Bonzini Sep 28, 2020

KVM: VMX: Use precomputed MAXPHYADDR for RTIT base MSR check



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>
Message-Id: <20200924194250.19137-2-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

parent 28e2b2f1

arch/x86/kvm/vmx/vmx.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -147,7 +147,7 @@ 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:

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