From nobody Mon Feb 9 23:40:20 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D087EFA373D for ; Sun, 30 Oct 2022 06:28:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231145AbiJ3G2u (ORCPT ); Sun, 30 Oct 2022 02:28:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46960 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230128AbiJ3GZP (ORCPT ); Sun, 30 Oct 2022 02:25:15 -0400 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D72A0209; Sat, 29 Oct 2022 23:24:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1667111054; x=1698647054; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=MDrBeEVg3cc7h0tcvmuzjVL0AqXKibnPzzkP01NyP5o=; b=mx9Rtyaa2pH6qBlmHvJJKuuera43ZdJ4MQ+h3nQnjfzc9kp9NsFgv1sF 4H+9vzlXHblYbzNIyARXNkHfR2xXIJFnHnH0B0axrrHWsvKNqOlDdlErV 541ZcDQTmUCInM95Fkzm3JTkVftCkOueSLT7Wb1hd254y9GGj42m5Qqg8 lgUNyJjL3Vnb740kCZfI67IviOxxThUBaeCAvqzxwzNK0Kv0DU6By6E/O W0HTMrZJ4iiPrpCZB9tL/ePgJKSmd0m9+v/2ElifjP5Cf0mWG1BNYtNn5 WbiU6Msya+9hGvlD4Xfn7taOPlSZ1nzL3alcrk4ZlXKP5aLAp3rK+2GX0 g==; X-IronPort-AV: E=McAfee;i="6500,9779,10515"; a="288435993" X-IronPort-AV: E=Sophos;i="5.95,225,1661842800"; d="scan'208";a="288435993" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Oct 2022 23:24:14 -0700 X-IronPort-AV: E=McAfee;i="6500,9779,10515"; a="878393162" X-IronPort-AV: E=Sophos;i="5.95,225,1661842800"; d="scan'208";a="878393162" Received: from ls.sc.intel.com (HELO localhost) ([143.183.96.54]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Oct 2022 23:24:14 -0700 From: isaku.yamahata@intel.com To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: isaku.yamahata@intel.com, isaku.yamahata@gmail.com, Paolo Bonzini , erdemaktas@google.com, Sean Christopherson , Sagi Shahar , David Matlack Subject: [PATCH v10 100/108] KVM: TDX: Handle TDX PV report fatal error hypercall Date: Sat, 29 Oct 2022 23:23:41 -0700 Message-Id: <82671e3e811ab5ad423e125186c050f46621dd86.1667110240.git.isaku.yamahata@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Isaku Yamahata Wire up TDX PV report fatal error hypercall to KVM_SYSTEM_EVENT_CRASH KVM exit event. Signed-off-by: Isaku Yamahata --- arch/x86/kvm/vmx/tdx.c | 20 ++++++++++++++++++++ include/uapi/linux/kvm.h | 1 + 2 files changed, 21 insertions(+) diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index e3062c245e70..16f168f4f21a 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -1068,6 +1068,24 @@ static int tdx_emulate_wrmsr(struct kvm_vcpu *vcpu) return 1; } =20 +static int tdx_report_fatal_error(struct kvm_vcpu *vcpu) +{ + /* + * Exit to userspace device model for teardown. + * Because guest TD is already panicing, returning an error to guerst TD + * doesn't make sense. No argument check is done. + */ + + vcpu->run->exit_reason =3D KVM_EXIT_SYSTEM_EVENT; + vcpu->run->system_event.type =3D KVM_SYSTEM_EVENT_TDX; + vcpu->run->system_event.ndata =3D 3; + vcpu->run->system_event.data[0] =3D TDG_VP_VMCALL_REPORT_FATAL_ERROR; + vcpu->run->system_event.data[1] =3D tdvmcall_a0_read(vcpu); + vcpu->run->system_event.data[2] =3D tdvmcall_a1_read(vcpu); + + return 0; +} + static int handle_tdvmcall(struct kvm_vcpu *vcpu) { if (tdvmcall_exit_type(vcpu)) @@ -1086,6 +1104,8 @@ static int handle_tdvmcall(struct kvm_vcpu *vcpu) return tdx_emulate_rdmsr(vcpu); case EXIT_REASON_MSR_WRITE: return tdx_emulate_wrmsr(vcpu); + case TDG_VP_VMCALL_REPORT_FATAL_ERROR: + return tdx_report_fatal_error(vcpu); default: break; } diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 49386e4de8b8..504a8f73284b 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -478,6 +478,7 @@ struct kvm_run { #define KVM_SYSTEM_EVENT_WAKEUP 4 #define KVM_SYSTEM_EVENT_SUSPEND 5 #define KVM_SYSTEM_EVENT_SEV_TERM 6 +#define KVM_SYSTEM_EVENT_TDX 7 __u32 type; __u32 ndata; union { --=20 2.25.1