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DIR:OUT; SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Mar 2024 08:51:16.7066 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d22e9a2c-ef91-44fb-8f59-08dc48bae7a9 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d; Ip=[165.204.84.17]; Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN1PEPF00004685.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB6494 Received-SPF: permerror client-ip=2a01:111:f403:2416::601; envelope-from=Michael.Roth@amd.com; helo=NAM11-CO1-obe.outbound.protection.outlook.com X-Spam_score_int: -24 X-Spam_score: -2.5 X-Spam_bar: -- X-Spam_report: (-2.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.422, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org SEV-SNP guests might issue MSR-based Page State Changes for situations like early boot where it might not be easily able to make use of a GHCB page to issue the request. Just as with GHCB-based Page State Changes, these are forwarded to userspace as KVM_EXIT_VMGEXITs. Add handling for these. Signed-off-by: Michael Roth --- target/i386/sev.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/target/i386/sev.c b/target/i386/sev.c index 0c6a253138..b54422b28e 100644 --- a/target/i386/sev.c +++ b/target/i386/sev.c @@ -1560,6 +1560,18 @@ out_unmap: return 0; } +static int kvm_handle_vmgexit_psc_msr_protocol(__u64 gpa, __u8 op, __u32 *psc_ret) +{ + int ret; + + ret = kvm_convert_memory(gpa, TARGET_PAGE_SIZE, + op == KVM_USER_VMGEXIT_PSC_MSR_OP_PRIVATE); + + *psc_ret = ret; + + return ret; +} + int kvm_handle_vmgexit(struct kvm_run *run) { int ret; @@ -1567,6 +1579,10 @@ int kvm_handle_vmgexit(struct kvm_run *run) if (run->vmgexit.type == KVM_USER_VMGEXIT_PSC) { ret = kvm_handle_vmgexit_psc(run->vmgexit.psc.shared_gpa, &run->vmgexit.psc.ret); + } else if (run->vmgexit.type == KVM_USER_VMGEXIT_PSC_MSR) { + ret = kvm_handle_vmgexit_psc_msr_protocol(run->vmgexit.psc_msr.gpa, + run->vmgexit.psc_msr.op, + &run->vmgexit.psc_msr.ret); } else { warn_report("KVM: unknown vmgexit type: %d", run->vmgexit.type); ret = -1;