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charset="iso-8859-1" Content-ID: Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: 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 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: BN0PR10MB5030.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: b5ff01a2-08cb-40fe-5bb8-08dc92117e5c X-MS-Exchange-CrossTenant-originalarrivaltime: 21 Jun 2024 16:45:01.1721 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: 8ic9X0ylDOfKy3O5Ycd4a4G3lonxds3m/0eJvBy3Kj5l3cQX8Ys/cBRp0aZ0U4vc2D/0MmMl8oM9Ke9WWLE3pw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ2PR10MB7059 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-06-21_08,2024-06-21_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 adultscore=0 bulkscore=0 phishscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2406180000 definitions=main-2406210121 X-Proofpoint-GUID: a8b2kpVdRfG_-17Y30FOQwnujA8gC3mF X-Proofpoint-ORIG-GUID: a8b2kpVdRfG_-17Y30FOQwnujA8gC3mF On 21/06/2024 14:40, Michael Roth wrote:=0A= > Version 2 of GHCB specification added support for the SNP Extended Guest= =0A= > Request Message NAE event. This event serves a nearly identical purpose= =0A= > to the previously-added SNP_GUEST_REQUEST event, but for certain message= =0A= > types it allows the guest to supply a buffer to be used for additional=0A= > information in some cases.=0A= > =0A= > Currently the GHCB spec only defines extended handling of this sort in=0A= > the case of attestation requests, where the additional buffer is used to= =0A= > supply a table of certificate data corresponding to the attestion=0A= =0A= typo: attestion=0A= =0A= > report's signing key. Support for this extended handling will require=0A= > additional KVM APIs to handle coordinating with userspace.=0A= > =0A= > Whether or not the hypervisor opts to provide this certificate data is=0A= > optional. However, support for processing SNP_EXTENDED_GUEST_REQUEST=0A= > GHCB requests is required by the GHCB 2.0 specification for SNP guests,= =0A= > so for now implement a stub implementation that provides an empty=0A= > certificate table to the guest if it supplies an additional buffer, but= =0A= > otherwise behaves identically to SNP_GUEST_REQUEST.=0A= > =0A= > Signed-off-by: Michael Roth =0A= =0A= Reviewed-by: Liam Merwick =0A= =0A= =0A= > ---=0A= > arch/x86/kvm/svm/sev.c | 60 ++++++++++++++++++++++++++++++++++++++++++= =0A= > 1 file changed, 60 insertions(+)=0A= =0A=