[PATCH 14/15] KVM: x86: Implement KVM_TRANSLATE2

[Sean Christopherson]

On Tue, Sep 10, 2024, Nikolas Wipper wrote:
> +int kvm_arch_vcpu_ioctl_translate2(struct kvm_vcpu *vcpu,
> +				    struct kvm_translation2 *tr)
> +{
> +	int idx, set_bit_mode = 0, access = 0;
> +	struct x86_exception exception = { };
> +	gva_t vaddr = tr->linear_address;
> +	u16 status = 0;
> +	gpa_t gpa;
> +
> +	if (tr->flags & KVM_TRANSLATE_FLAGS_SET_ACCESSED)
> +		set_bit_mode |= PWALK_SET_ACCESSED;
> +	if (tr->flags & KVM_TRANSLATE_FLAGS_SET_DIRTY)
> +		set_bit_mode |= PWALK_SET_DIRTY;
> +	if (tr->flags & KVM_TRANSLATE_FLAGS_FORCE_SET_ACCESSED)
> +		set_bit_mode |= PWALK_FORCE_SET_ACCESSED;
> +
> +	if (tr->access & KVM_TRANSLATE_ACCESS_WRITE)
> +		access |= PFERR_WRITE_MASK;
> +	if (tr->access & KVM_TRANSLATE_ACCESS_USER)
> +		access |= PFERR_USER_MASK;
> +	if (tr->access & KVM_TRANSLATE_ACCESS_EXEC)
> +		access |= PFERR_FETCH_MASK;

WRITE and FETCH accesses need to be mutually exclusive.