From patchwork Fri Jan 24 13:20:23 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaoyao Li X-Patchwork-Id: 13949481 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E532EC0218D for ; Fri, 24 Jan 2025 13:44:29 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tbJuQ-0008HC-OC; Fri, 24 Jan 2025 08:39:42 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tbJto-0006rt-RP for qemu-devel@nongnu.org; Fri, 24 Jan 2025 08:39:07 -0500 Received: from mgamail.intel.com ([198.175.65.13]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tbJtl-0003xi-8C for qemu-devel@nongnu.org; Fri, 24 Jan 2025 08:39:03 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1737725942; x=1769261942; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=PnMivpqsKENYPJ5DahWXLvF1ZEiK4OeXxRfzVf2Js5A=; b=eODL+CXFMhyK7aZpGO03u0fzpVPtFgzN91WRmrLHPBbH1jBgjpVeSxgU maT6lEkS8HwJDz4bYpF2ggHmeGb+BjhH/MccdG9nzO6zzweC/JYksSRmw UnM+s3hOR2dpZU/7FRVMDdA3grGmnVOqoprIdWDluX0VuRCAxVlQxSLhZ Jr7gP6Qd0BZxzsvbcVF4X39cH+jTmvzWyqD3cE7QFL8fQKRVQpM3FH7bg VTUslFPxPLCqd4tJ0mxmmvOXdpIQfBciQS80NH5WR3IJlOcXWXbkpjwcn ykzmBehBQU56WToooEPtmSnIomMZ4rlYMqc1NsHDfaLFW4kw8veq+/kDX g==; X-CSE-ConnectionGUID: tx4+7eNvSY6zXSak0B+sAQ== X-CSE-MsgGUID: pcyK3i8WQR+XaHmrjjEWqQ== X-IronPort-AV: E=McAfee;i="6700,10204,11325"; a="49246451" X-IronPort-AV: E=Sophos;i="6.13,231,1732608000"; d="scan'208";a="49246451" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by orvoesa105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jan 2025 05:38:44 -0800 X-CSE-ConnectionGUID: iD2telCRSlykT7C4RRvX3Q== X-CSE-MsgGUID: Q+yP9ClSSDGhPcs6vcezJA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,224,1728975600"; d="scan'208";a="111804345" Received: from lxy-clx-4s.sh.intel.com ([10.239.48.52]) by fmviesa003.fm.intel.com with ESMTP; 24 Jan 2025 05:38:40 -0800 From: Xiaoyao Li To: Paolo Bonzini , =?utf-8?q?Daniel_P=2E_Berrang=C3=A9?= , =?utf-8?q?Phil?= =?utf-8?q?ippe_Mathieu-Daud=C3=A9?= , Igor Mammedov Cc: Zhao Liu , "Michael S. Tsirkin" , Eric Blake , Markus Armbruster , Peter Maydell , Marcelo Tosatti , Huacai Chen , Rick Edgecombe , Francesco Lavra , xiaoyao.li@intel.com, qemu-devel@nongnu.org, kvm@vger.kernel.org Subject: [PATCH v7 27/52] i386/tdx: Handle KVM_SYSTEM_EVENT_TDX_FATAL Date: Fri, 24 Jan 2025 08:20:23 -0500 Message-Id: <20250124132048.3229049-28-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250124132048.3229049-1-xiaoyao.li@intel.com> References: <20250124132048.3229049-1-xiaoyao.li@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=198.175.65.13; envelope-from=xiaoyao.li@intel.com; helo=mgamail.intel.com X-Spam_score_int: -63 X-Spam_score: -6.4 X-Spam_bar: ------ X-Spam_report: (-6.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-2.996, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, HK_RANDOM_ENVFROM=0.001, HK_RANDOM_FROM=0.998, RCVD_IN_DNSWL_MED=-2.3, RCVD_IN_VALIDITY_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, SPF_HELO_NONE=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 TD guest can use TDG.VP.VMCALL to request termination. KVM translates such request into KVM_EXIT_SYSTEM_EVENT with type of KVM_SYSTEM_EVENT_TDX_FATAL. Add hanlder for such exit. Parse and print the error message, and terminate the TD guest in the handler. Signed-off-by: Xiaoyao Li --- Changes in v6: - replace the patch " i386/tdx: Handle TDG.VP.VMCALL" in v5; --- target/i386/kvm/kvm.c | 10 ++++++++++ target/i386/kvm/tdx-stub.c | 5 +++++ target/i386/kvm/tdx.c | 24 ++++++++++++++++++++++++ target/i386/kvm/tdx.h | 2 ++ 4 files changed, 41 insertions(+) diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index 7de5014051eb..a76f34537908 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -6128,6 +6128,16 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) case KVM_EXIT_HYPERCALL: ret = kvm_handle_hypercall(run); break; + case KVM_EXIT_SYSTEM_EVENT: + switch (run->system_event.type) { + case KVM_SYSTEM_EVENT_TDX_FATAL: + ret = tdx_handle_report_fatal_error(cpu, run); + break; + default: + ret = -1; + break; + } + break; default: fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason); ret = -1; diff --git a/target/i386/kvm/tdx-stub.c b/target/i386/kvm/tdx-stub.c index 7748b6d0a446..720a4ff046ee 100644 --- a/target/i386/kvm/tdx-stub.c +++ b/target/i386/kvm/tdx-stub.c @@ -13,3 +13,8 @@ int tdx_parse_tdvf(void *flash_ptr, int size) { return -EINVAL; } + +int tdx_handle_report_fatal_error(X86CPU *cpu, struct kvm_run *run) +{ + return -EINVAL; +} diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c index 1d0cf29c39f9..f857fddd839b 100644 --- a/target/i386/kvm/tdx.c +++ b/target/i386/kvm/tdx.c @@ -601,6 +601,30 @@ int tdx_parse_tdvf(void *flash_ptr, int size) return tdvf_parse_metadata(&tdx_guest->tdvf, flash_ptr, size); } +int tdx_handle_report_fatal_error(X86CPU *cpu, struct kvm_run *run) +{ + uint64_t error_code = run->system_event.data[0]; + char *message = NULL; + + if (error_code & 0xffff) { + error_report("TDX: REPORT_FATAL_ERROR: invalid error code: 0x%lx", + error_code); + return -1; + } + + /* It has optional message */ + if (run->system_event.data[2]) { +#define TDX_FATAL_MESSAGE_MAX 64 + message = g_malloc0(TDX_FATAL_MESSAGE_MAX + 1); + + memcpy(message, &run->system_event.data[2], TDX_FATAL_MESSAGE_MAX); + message[TDX_FATAL_MESSAGE_MAX] = '\0'; + } + + error_report("TD guest reports fatal error. %s", message ? : ""); + return -1; +} + static bool tdx_guest_get_sept_ve_disable(Object *obj, Error **errp) { TdxGuest *tdx = TDX_GUEST(obj); diff --git a/target/i386/kvm/tdx.h b/target/i386/kvm/tdx.h index 36a7400e7480..04b5afe199f9 100644 --- a/target/i386/kvm/tdx.h +++ b/target/i386/kvm/tdx.h @@ -8,6 +8,7 @@ #endif #include "confidential-guest.h" +#include "cpu.h" #include "hw/i386/tdvf.h" #define TYPE_TDX_GUEST "tdx-guest" @@ -59,5 +60,6 @@ bool is_tdx_vm(void); int tdx_pre_create_vcpu(CPUState *cpu, Error **errp); void tdx_set_tdvf_region(MemoryRegion *tdvf_mr); int tdx_parse_tdvf(void *flash_ptr, int size); +int tdx_handle_report_fatal_error(X86CPU *cpu, struct kvm_run *run); #endif /* QEMU_I386_TDX_H */