Re: [PATCH] Add KVM_EXIT_SHUTDOWN metadata for SEV-ES

[Paolo Bonzini <pbonzini@redhat.com>]

On 3/21/22 16:02, Peter Gonda wrote:
> SEV-ES guests can request termination using the GHCB's MSR protocol. See
> AMD's GHCB spec section '4.1.13 Termination Request'. Currently when a
> guest does this the userspace VMM sees an KVM_EXIT_UNKNOWN (-EVINAL)
> return code from KVM_RUN. By adding a KVM_EXIT_SHUTDOWN_ENTRY to kvm_run
> struct the userspace VMM can clearly see the guest has requested a SEV-ES
> termination including the termination reason code set and reason code.
> 
> Signed-off-by: Peter Gonda <pgonda@google.com>
> Cc: Borislav Petkov <bp@alien8.de>
> Cc: Tom Lendacky <thomas.lendacky@amd.com>
> Cc: Brijesh Singh <brijesh.singh@amd.com>
> Cc: Joerg Roedel <jroedel@suse.de>
> Cc: Marc Orr <marcorr@google.com>
> Cc: Sean Christopherson <seanjc@google.com>
> Cc: kvm@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org

Looks good, but it has to also add a capability.

> +		/* KVM_EXIT_SHUTDOWN_ENTRY */

Just KVM_EXIT_SHUTDOWN.

Paolo

> +		struct {
> +			__u64 reason;
> +			__u32 ndata;
> +			__u64 data[16];
> +		} shutdown;
>   		/* KVM_EXIT_FAIL_ENTRY */
>   		struct {
>   			__u64 hardware_entry_failure_reason;