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/*
* x86-specific confidential guest methods.
*
* Copyright (c) 2024 Red Hat Inc.
*
* Authors:
* Paolo Bonzini <pbonzini@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef TARGET_I386_CG_H
#define TARGET_I386_CG_H
#include "qom/object.h"
#include "exec/confidential-guest-support.h"
#define TYPE_X86_CONFIDENTIAL_GUEST "x86-confidential-guest"
OBJECT_DECLARE_TYPE(X86ConfidentialGuest,
X86ConfidentialGuestClass,
X86_CONFIDENTIAL_GUEST)
struct X86ConfidentialGuest {
/* <private> */
ConfidentialGuestSupport parent_obj;
};
/**
* X86ConfidentialGuestClass:
*
* Class to be implemented by confidential-guest-support concrete objects
* for the x86 target.
*/
struct X86ConfidentialGuestClass {
/* <private> */
ConfidentialGuestSupportClass parent;
/* <public> */
int (*kvm_type)(X86ConfidentialGuest *cg);
uint32_t (*mask_cpuid_features)(X86ConfidentialGuest *cg, uint32_t feature, uint32_t index,
int reg, uint32_t value);
};
/**
* x86_confidential_guest_kvm_type:
*
* Calls #X86ConfidentialGuestClass.unplug callback of @plug_handler.
*/
static inline int x86_confidential_guest_kvm_type(X86ConfidentialGuest *cg)
{
X86ConfidentialGuestClass *klass = X86_CONFIDENTIAL_GUEST_GET_CLASS(cg);
if (klass->kvm_type) {
return klass->kvm_type(cg);
} else {
return 0;
}
}
/**
* x86_confidential_guest_mask_cpuid_features:
*
* Removes unsupported features from a confidential guest's CPUID values, returns
* the value with the bits removed. The bits removed should be those that KVM
* provides independent of host-supported CPUID features, but are not supported by
* the confidential computing firmware.
*/
static inline int x86_confidential_guest_mask_cpuid_features(X86ConfidentialGuest *cg,
uint32_t feature, uint32_t index,
int reg, uint32_t value)
{
X86ConfidentialGuestClass *klass = X86_CONFIDENTIAL_GUEST_GET_CLASS(cg);
if (klass->mask_cpuid_features) {
return klass->mask_cpuid_features(cg, feature, index, reg, value);
} else {
return value;
}
}
#endif
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