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KVM: x86: Add a helper to handle legal GPA with an alignment requirement

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Add a helper to genericize checking for a legal GPA that also must
conform to an arbitrary alignment, and use it in the existing
page_address_valid().  Future patches will replace open coded variants
in VMX and SVM.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210204000117.3303214-5-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2021-02-03 16:01:09 -08:00 committed by Paolo Bonzini
parent 4bda0e9786
commit da6c6a7c06
1 changed files with 7 additions and 1 deletions
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8
arch/x86/kvm/cpuid.h
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@ -46,9 +46,15 @@ static inline bool kvm_vcpu_is_illegal_gpa(struct kvm_vcpu *vcpu, gpa_t gpa)
return !kvm_vcpu_is_legal_gpa(vcpu, gpa);
}
static inline bool kvm_vcpu_is_legal_aligned_gpa(struct kvm_vcpu *vcpu,
gpa_t gpa, gpa_t alignment)
{
return IS_ALIGNED(gpa, alignment) && kvm_vcpu_is_legal_gpa(vcpu, gpa);
}
static inline bool page_address_valid(struct kvm_vcpu *vcpu, gpa_t gpa)
{
return PAGE_ALIGNED(gpa) && kvm_vcpu_is_legal_gpa(vcpu, gpa);
return kvm_vcpu_is_legal_aligned_gpa(vcpu, gpa, PAGE_SIZE);
}
struct cpuid_reg {