Messages in this thread Patch in this message | | | From | Sean Christopherson <> | Subject | [PATCH v3 5/5] KVM: VMX: Use "illegal GPA" helper for PT/RTIT output base check | Date | Thu, 24 Sep 2020 12:42:50 -0700 |
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Use kvm_vcpu_is_illegal_gpa() to check for a legal GPA when validating a PT output base instead of open coding a clever, but difficult to read, variant. Code readability is far more important than shaving a few uops in a slow path.
No functional change intended.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> --- arch/x86/kvm/vmx/vmx.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 7987de212057..8f1eb5dca794 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -1037,7 +1037,7 @@ static inline bool pt_can_write_msr(struct vcpu_vmx *vmx) static inline bool pt_output_base_valid(struct kvm_vcpu *vcpu, u64 base) { /* The base must be 128-byte aligned and a legal physical address. */ - return !(base & (~((1UL << cpuid_maxphyaddr(vcpu)) - 1) | 0x7f)); + return !kvm_vcpu_is_illegal_gpa(vcpu, base) && !(base & 0x7f); } static inline void pt_load_msr(struct pt_ctx *ctx, u32 addr_range) -- 2.28.0
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