The command finalize the guest receiving process and make the SEV guest ready for the execution. Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx> Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx> Cc: "Radim Krčmář" <rkrcmar@xxxxxxxxxx> Cc: Joerg Roedel <joro@xxxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxx> Cc: Tom Lendacky <thomas.lendacky@xxxxxxx> Cc: x86@xxxxxxxxxx Cc: kvm@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Signed-off-by: Brijesh Singh <brijesh.singh@xxxxxxx> --- .../virtual/kvm/amd-memory-encryption.rst | 8 +++++++ arch/x86/kvm/svm.c | 23 +++++++++++++++++++ 2 files changed, 31 insertions(+) diff --git a/Documentation/virtual/kvm/amd-memory-encryption.rst b/Documentation/virtual/kvm/amd-memory-encryption.rst index 6ce4cedb84e4..04e13aeffd2b 100644 --- a/Documentation/virtual/kvm/amd-memory-encryption.rst +++ b/Documentation/virtual/kvm/amd-memory-encryption.rst @@ -350,6 +350,14 @@ Returns: 0 on success, -negative on error __u32 trans_len; }; +15. KVM_SEV_RECEIVE_FINISH +------------------------ + +After completion of the migration flow, the KVM_SEV_RECEIVE_FINISH command can be +issued by the hypervisor to make the guest ready for execution. + +Returns: 0 on success, -negative on error + References ========== diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 51e8c2bf28db..90e32e3f2a8b 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -7340,6 +7340,26 @@ static int sev_receive_update_data(struct kvm *kvm, struct kvm_sev_cmd *argp) return ret; } +static int sev_receive_finish(struct kvm *kvm, struct kvm_sev_cmd *argp) +{ + struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info; + struct sev_data_receive_finish *data; + int ret; + + if (!sev_guest(kvm)) + return -ENOTTY; + + data = kzalloc(sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->handle = sev->handle; + ret = sev_issue_cmd(kvm, SEV_CMD_RECEIVE_FINISH, data, &argp->error); + + kfree(data); + return ret; +} + static int svm_mem_enc_op(struct kvm *kvm, void __user *argp) { struct kvm_sev_cmd sev_cmd; @@ -7396,6 +7416,9 @@ static int svm_mem_enc_op(struct kvm *kvm, void __user *argp) case KVM_SEV_RECEIVE_UPDATE_DATA: r = sev_receive_update_data(kvm, &sev_cmd); break; + case KVM_SEV_RECEIVE_FINISH: + r = sev_receive_finish(kvm, &sev_cmd); + break; default: r = -EINVAL; goto out; -- 2.17.1