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KVM, SEV: Add KVM_EXIT_SHUTDOWN metadata for SEV-ES

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If an SEV-ES guest requests termination, exit to userspace with
KVM_EXIT_SYSTEM_EVENT and a dedicated SEV_TERM type instead of -EINVAL
so that userspace can take appropriate action.

See AMD's GHCB spec section '4.1.13 Termination Request' for more details.

Suggested-by: Sean Christopherson <seanjc@google.com>
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Peter Gonda <pgonda@google.com>

Reported-by: kernel test robot <lkp@intel.com>
Message-Id: <20220407210233.782250-1-pgonda@google.com>
[Add documentatino. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Peter Gonda 2022-04-07 14:02:33 -07:00 • committed by Paolo Bonzini
parent 9bd1f0efa8
commit c24a950ec7
3 changed files with 22 additions and 4 deletions
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5
include/uapi/linux/kvm.h
View file

@ -444,8 +444,11 @@ struct kvm_run {
#define KVM_SYSTEM_EVENT_SHUTDOWN 1
#define KVM_SYSTEM_EVENT_RESET 2
#define KVM_SYSTEM_EVENT_CRASH 3
#define KVM_SYSTEM_EVENT_SEV_TERM 4
#define KVM_SYSTEM_EVENT_NDATA_VALID (1u << 31)
__u32 type;
__u64 flags;
__u32 ndata;
__u64 data[16];
} system_event;
/* KVM_EXIT_S390_STSI */
struct {