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Thu, 10 Dec 2020 17:11:55 +0000 From: Tom Lendacky To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org Cc: Paolo Bonzini , Jim Mattson , Joerg Roedel , Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Borislav Petkov , Ingo Molnar , Thomas Gleixner , Brijesh Singh Subject: [PATCH v5 11/34] KVM: SVM: Prepare for SEV-ES exit handling in the sev.c file Date: Thu, 10 Dec 2020 11:09:46 -0600 Message-Id: <5b8b0ffca8137f3e1e257f83df9f5c881c8a96a3.1607620209.git.thomas.lendacky@amd.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: References: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit X-Originating-IP: [165.204.77.1] X-ClientProxiedBy: CH2PR14CA0009.namprd14.prod.outlook.com (2603:10b6:610:60::19) To CY4PR12MB1352.namprd12.prod.outlook.com (2603:10b6:903:3a::13) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from tlendack-t1.amd.com (165.204.77.1) by CH2PR14CA0009.namprd14.prod.outlook.com (2603:10b6:610:60::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3654.12 via Frontend Transport; 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X-MS-Exchange-AntiSpam-MessageData: =?us-ascii?Q?0AnR5bse5+04dFzo4qxxL0/LHzhBmiqYsEkq/pbAkTO6POdjkWOid+EQ+WmG?= =?us-ascii?Q?whjdxWV1diT6kYk/OoEJYB0ml4wY8GnClSi/scQnz7DzJjNBsxIFrSCRLRJf?= =?us-ascii?Q?PFiaPr8tzpACACQa7JSqxGVKG9z1oSOao+K8d14meo3hLAwm5nEHhaPbOHwZ?= =?us-ascii?Q?ZLUIxunAPsT56MfX5KvM+LPRKDAqUfpMQZoUPv2lNTtV6xbcBpiLvPJ61VHC?= =?us-ascii?Q?p0oc9Zv53mYgfmJp1MDDMSIoFCqbE/0NO4A3UkMoLCYXJvnXyFjYP9i59pMf?= =?us-ascii?Q?A8OBhuP+vT4GdFFjW93ItV/ZawfCFbPB80Ww6zlrBTf8ElV2NXUCvOdcH07Q?= =?us-ascii?Q?cotwgaXNQHgAeNqnZ81D5XCLj6o89THeGEOoz/9xgvSrQjiy7rFeU0OcSdCO?= =?us-ascii?Q?lRyJY2AIVHEv/MWXDlmlzvc2ld3BWOtW9eV2epnlaqKdH6oqUqNfM4o2HDd6?= =?us-ascii?Q?+NtT/m2qlq/1xxhiczF9zSqwhqZRk2RPO6Oc4tKLc1BWA8jN6gdze3UAhz+b?= =?us-ascii?Q?/Qb6k3z0dBOepbU5k/FDdT1ZdfZJARigG2QLEboxspKHRueMzsQTaa8rxUv0?= =?us-ascii?Q?xnzcn+VPfB+hXatUAYfWpRUhmsITzYq2x/mm0Xd13vmd4X9UEXJoThXDQ15D?= =?us-ascii?Q?0J17rUQu1GIG8i05IulPaZrRw1fbCvTQcawDXcDQ12mCFHVe/KUKJmKZUila?= =?us-ascii?Q?FEBqnULB6dNevywNJ5nzdpeOh5lw/gs/a0TIxltxl/TyQ66ZJQOTAyYQPY/i?= =?us-ascii?Q?HpzH2TfJtb7OYhvFL+dXqg6GBx5P6o3DPTrSq5i/Ua3oVkVxVZtsre+XqRrY?= =?us-ascii?Q?SyebsO/BAbhaVaiV+0oEZUm61q35aARjSX+bonkaezqHeqyML8y6HfUg7uqP?= =?us-ascii?Q?NdNyLSlBXJ+rj63y8dr+qb85iVliiLj81vQj7KUOCtxgQke/jeLSO+qrJaM8?= =?us-ascii?Q?iL3DzGiPPcPsyVp2ndUX/glXKiKwKfJN+i1Hsua5yz+QNmt8A24r5+JKNXtY?= =?us-ascii?Q?sowu?= X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-AuthSource: CY4PR12MB1352.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 10 Dec 2020 17:11:55.6017 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-Network-Message-Id: 06d0c3e1-0283-4f7f-1676-08d89d2eb239 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: WUeKvcRild/cLPDI8LJg3ZURo9NgsN5RICn22nmtlP8RIL2n18xKjzjxfPd63+cMKEMrhMqfIzvtHFcRGNkegA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR1201MB0149 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Tom Lendacky This is a pre-patch to consolidate some exit handling code into callable functions. Follow-on patches for SEV-ES exit handling will then be able to use them from the sev.c file. Signed-off-by: Tom Lendacky --- arch/x86/kvm/svm/svm.c | 64 +++++++++++++++++++++++++----------------- 1 file changed, 38 insertions(+), 26 deletions(-) diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 3b02620ba9a9..ce7bcb9cf90c 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -3151,6 +3151,43 @@ static void dump_vmcb(struct kvm_vcpu *vcpu) "excp_to:", save->last_excp_to); } +static int svm_handle_invalid_exit(struct kvm_vcpu *vcpu, u64 exit_code) +{ + if (exit_code < ARRAY_SIZE(svm_exit_handlers) && + svm_exit_handlers[exit_code]) + return 0; + + vcpu_unimpl(vcpu, "svm: unexpected exit reason 0x%llx\n", exit_code); + dump_vmcb(vcpu); + vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; + vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_UNEXPECTED_EXIT_REASON; + vcpu->run->internal.ndata = 2; + vcpu->run->internal.data[0] = exit_code; + vcpu->run->internal.data[1] = vcpu->arch.last_vmentry_cpu; + + return -EINVAL; +} + +static int svm_invoke_exit_handler(struct vcpu_svm *svm, u64 exit_code) +{ + if (svm_handle_invalid_exit(&svm->vcpu, exit_code)) + return 0; + +#ifdef CONFIG_RETPOLINE + if (exit_code == SVM_EXIT_MSR) + return msr_interception(svm); + else if (exit_code == SVM_EXIT_VINTR) + return interrupt_window_interception(svm); + else if (exit_code == SVM_EXIT_INTR) + return intr_interception(svm); + else if (exit_code == SVM_EXIT_HLT) + return halt_interception(svm); + else if (exit_code == SVM_EXIT_NPF) + return npf_interception(svm); +#endif + return svm_exit_handlers[exit_code](svm); +} + static void svm_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2, u32 *intr_info, u32 *error_code) { @@ -3217,32 +3254,7 @@ static int handle_exit(struct kvm_vcpu *vcpu, fastpath_t exit_fastpath) if (exit_fastpath != EXIT_FASTPATH_NONE) return 1; - if (exit_code >= ARRAY_SIZE(svm_exit_handlers) - || !svm_exit_handlers[exit_code]) { - vcpu_unimpl(vcpu, "svm: unexpected exit reason 0x%x\n", exit_code); - dump_vmcb(vcpu); - vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR; - vcpu->run->internal.suberror = - KVM_INTERNAL_ERROR_UNEXPECTED_EXIT_REASON; - vcpu->run->internal.ndata = 2; - vcpu->run->internal.data[0] = exit_code; - vcpu->run->internal.data[1] = vcpu->arch.last_vmentry_cpu; - return 0; - } - -#ifdef CONFIG_RETPOLINE - if (exit_code == SVM_EXIT_MSR) - return msr_interception(svm); - else if (exit_code == SVM_EXIT_VINTR) - return interrupt_window_interception(svm); - else if (exit_code == SVM_EXIT_INTR) - return intr_interception(svm); - else if (exit_code == SVM_EXIT_HLT) - return halt_interception(svm); - else if (exit_code == SVM_EXIT_NPF) - return npf_interception(svm); -#endif - return svm_exit_handlers[exit_code](svm); + return svm_invoke_exit_handler(svm, exit_code); } static void reload_tss(struct kvm_vcpu *vcpu) -- 2.28.0