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confidential guest support: Add kvm_init() and kvm_reset() in class 

Different confidential VMs in different architectures all have the same
needs to do their specific initialization (and maybe resetting) stuffs
with KVM. Currently each of them exposes individual *_kvm_init()
functions and let machine code or kvm code to call it.

To facilitate the introduction of confidential guest technology from
different x86 vendors, add two virtual functions, kvm_init() and kvm_reset()
in ConfidentialGuestSupportClass, and expose two helpers functions for
invodking them.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Message-Id: <20240229060038.606591-1-xiaoyao.li@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Xiaoyao Li 2024-02-29 01:00:35 -05:00 committed by Paolo Bonzini
parent 292dd287e7
commit 41a605944e
1 changed files with 33 additions and 1 deletions
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34
include/exec/confidential-guest-support.h
View File

@ -23,7 +23,10 @@
#include "qom/object.h"
#define TYPE_CONFIDENTIAL_GUEST_SUPPORT "confidential-guest-support"
OBJECT_DECLARE_SIMPLE_TYPE(ConfidentialGuestSupport, CONFIDENTIAL_GUEST_SUPPORT)
OBJECT_DECLARE_TYPE(ConfidentialGuestSupport,
ConfidentialGuestSupportClass,
CONFIDENTIAL_GUEST_SUPPORT)
struct ConfidentialGuestSupport {
Object parent;
@ -55,8 +58,37 @@ struct ConfidentialGuestSupport {
typedef struct ConfidentialGuestSupportClass {
ObjectClass parent;
int (*kvm_init)(ConfidentialGuestSupport *cgs, Error **errp);
int (*kvm_reset)(ConfidentialGuestSupport *cgs, Error **errp);
} ConfidentialGuestSupportClass;
static inline int confidential_guest_kvm_init(ConfidentialGuestSupport *cgs,
Error **errp)
{
ConfidentialGuestSupportClass *klass;
klass = CONFIDENTIAL_GUEST_SUPPORT_GET_CLASS(cgs);
if (klass->kvm_init) {
return klass->kvm_init(cgs, errp);
}
return 0;
}
static inline int confidential_guest_kvm_reset(ConfidentialGuestSupport *cgs,
Error **errp)
{
ConfidentialGuestSupportClass *klass;
klass = CONFIDENTIAL_GUEST_SUPPORT_GET_CLASS(cgs);
if (klass->kvm_reset) {
return klass->kvm_reset(cgs, errp);
}
return 0;
}
#endif /* !CONFIG_USER_ONLY */
#endif /* QEMU_CONFIDENTIAL_GUEST_SUPPORT_H */