Re: [PATCH v1-revised 1/5] KVM: SEV: Provide support for SNP_GUEST_REQUEST NAE event

[Liam Merwick <liam.merwick@oracle.com>]

On 21/06/2024 18:15, Michael Roth wrote:
> From: Brijesh Singh <brijesh.singh@amd.com>
> 
> Version 2 of GHCB specification added support for the SNP Guest Request
> Message NAE event. The event allows for an SEV-SNP guest to make
> requests to the SEV-SNP firmware through hypervisor using the
> SNP_GUEST_REQUEST API defined in the SEV-SNP firmware specification.
> 
> This is used by guests primarily to request attestation reports from
> firmware. There are other request types are available as well, but the
> specifics of what guest requests are being made are opaque to the
> hypervisor, which only serves as a proxy for the guest requests and
> firmware responses.
> 
> Implement handling for these events.
> 
> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
> Co-developed-by: Alexey Kardashevskiy <aik@amd.com>
> Signed-off-by: Alexey Kardashevskiy <aik@amd.com>
> Co-developed-by: Ashish Kalra <ashish.kalra@amd.com>
> Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
> Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
> [mdr: ensure FW command failures are indicated to guest, drop extended
>   request handling to be re-written as separate patch, massage commit]
> Signed-off-by: Michael Roth <michael.roth@amd.com>
> Message-ID: <20240501085210.2213060-19-michael.roth@amd.com>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Reviewed-by: Liam Merwick <liam.merwick@oracle.com>

> ---
>   arch/x86/kvm/svm/sev.c         | 73 ++++++++++++++++++++++++++++++++++
>   include/uapi/linux/sev-guest.h |  9 +++++
>   2 files changed, 82 insertions(+)
>