static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva,
				gpa_t *gpa, struct x86_exception *exception,
				bool write)
{
	struct kvm_mmu *mmu = vcpu->arch.walk_mmu;
	u32 access = ((static_call(kvm_x86_get_cpl)(vcpu) == 3) ? PFERR_USER_MASK : 0)
		| (write ? PFERR_WRITE_MASK : 0);

	/*
	 * currently PKRU is only applied to ept enabled guest so
	 * there is no pkey in EPT page table for L1 guest or EPT
	 * shadow page table for L2 guest.
	 */
	if (vcpu_match_mmio_gva(vcpu, gva) && (!is_paging(vcpu) ||
	    !permission_fault(vcpu, vcpu->arch.walk_mmu,
			      vcpu->arch.mmio_access, 0, access))) {
		*gpa = vcpu->arch.mmio_gfn << PAGE_SHIFT |
					(gva & (PAGE_SIZE - 1));
		trace_vcpu_match_mmio(gva, *gpa, write, false);
		return 1;
	}

	*gpa = mmu->gva_to_gpa(vcpu, mmu, gva, access, exception);

	if (*gpa == UNMAPPED_GVA)
		return -1;

	return vcpu_is_mmio_gpa(vcpu, gva, *gpa, write);
}
static int vcpu_mmio_gva_to_gpa(struct kvm_vcpu *vcpu, unsigned long gva,
				gpa_t *gpa, struct x86_exception *exception,
				bool write)
{
	struct kvm_mmu *mmu = vcpu->arch.walk_mmu;
	u32 access = ((static_call(kvm_x86_get_cpl)(vcpu) == 3) ? PFERR_USER_MASK : 0)
		| (write ? PFERR_WRITE_MASK : 0);

	 
	if (vcpu_match_mmio_gva(vcpu, gva) && (!is_paging(vcpu) ||
	    !permission_fault(vcpu, vcpu->arch.walk_mmu,
			      vcpu->arch.mmio_access, 0, access))) {
		*gpa = vcpu->arch.mmio_gfn << PAGE_SHIFT |
					(gva & (PAGE_SIZE - 1));
		trace_vcpu_match_mmio(gva, *gpa, write, false);
		return 1;
	}

	*gpa = mmu->gva_to_gpa(vcpu, mmu, gva, access, exception);

	if (*gpa == UNMAPPED_GVA)
		return -1;

	return vcpu_is_mmio_gpa(vcpu, gva, *gpa, write);
}