From patchwork Wed Nov 15 07:15:05 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaoyao Li X-Patchwork-Id: 13456363 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C428EBA5F for ; Wed, 15 Nov 2023 07:22:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="BxhPWXws" Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DC3319E for ; Tue, 14 Nov 2023 23:22:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1700032971; x=1731568971; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=8BrgXfAQfZqcjZLSqCUCb/djRTy+aDK5w/IlCWoRec8=; b=BxhPWXwsY132f+BimuGVmgtv6hjha1GJDsjDSaKK8LjeOhzHo1RyWLo9 rXxulUmD/aOPy8BHwACG17p3YJvxFXq4dTEzxwN6Elz/6Lf3Usy/UYs1M H7GLRjH+BexJGOedBFFutrGsbVG45Do5tDn2QnCFjaK089jQNxljHjxgt vSYqbkuadbmMVTmIlfdZfiboXAFcAWQGpNhou1d6Z7xkM+uTbb9X7wz8X gqogcQW3xp/G4fcJ6jlRoqMBWeG1rnMRT8DdUracVHRhCholMgR7iblZU i7AaDaAW9hliRDIcdew19UpRVkuB+NKOuIEJyufbEdmNFAbE1kcQO1qUn w==; X-IronPort-AV: E=McAfee;i="6600,9927,10894"; a="390623497" X-IronPort-AV: E=Sophos;i="6.03,304,1694761200"; d="scan'208";a="390623497" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Nov 2023 23:22:51 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10894"; a="714800309" X-IronPort-AV: E=Sophos;i="6.03,304,1694761200"; d="scan'208";a="714800309" Received: from lxy-clx-4s.sh.intel.com ([10.239.48.52]) by orsmga003.jf.intel.com with ESMTP; 14 Nov 2023 23:22:45 -0800 From: Xiaoyao Li To: Paolo Bonzini , David Hildenbrand , Igor Mammedov , "Michael S . Tsirkin" , Marcel Apfelbaum , Richard Henderson , Peter Xu , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Cornelia Huck , =?utf-8?q?Daniel_P_=2E_Berrang=C3=A9?= , Eric Blake , Markus Armbruster , Marcelo Tosatti Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, xiaoyao.li@intel.com, Michael Roth , Sean Christopherson , Claudio Fontana , Gerd Hoffmann , Isaku Yamahata , Chenyi Qiang Subject: [PATCH v3 56/70] i386/tdx: Handle TDG.VP.VMCALL Date: Wed, 15 Nov 2023 02:15:05 -0500 Message-Id: <20231115071519.2864957-57-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231115071519.2864957-1-xiaoyao.li@intel.com> References: <20231115071519.2864957-1-xiaoyao.li@intel.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 TD guest can use TDG.VP.VMCALL to request termination with error message encoded in GPRs. Parse and print the error message, and terminate the TD guest in the handler. Signed-off-by: Xiaoyao Li --- target/i386/kvm/tdx.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c index 96a10b0bb190..a42b5cea36c5 100644 --- a/target/i386/kvm/tdx.c +++ b/target/i386/kvm/tdx.c @@ -1003,6 +1003,7 @@ static void tdx_guest_class_init(ObjectClass *oc, void *data) #define TDG_VP_VMCALL_MAP_GPA 0x10001ULL #define TDG_VP_VMCALL_GET_QUOTE 0x10002ULL +#define TDG_VP_VMCALL_REPORT_FATAL_ERROR 0x10003ULL #define TDG_VP_VMCALL_SETUP_EVENT_NOTIFY_INTERRUPT 0x10004ULL #define TDG_VP_VMCALL_SUCCESS 0x0000000000000000ULL @@ -1478,6 +1479,42 @@ static void tdx_handle_get_quote(X86CPU *cpu, struct kvm_tdx_vmcall *vmcall) vmcall->status_code = TDG_VP_VMCALL_SUCCESS; } +static void tdx_handle_report_fatal_error(X86CPU *cpu, + struct kvm_tdx_vmcall *vmcall) +{ + uint64_t error_code = vmcall->in_r12; + char *message = NULL; + + if (error_code & 0xffff) { + error_report("invalid error code of TDG.VP.VMCALL\n"); + exit(1); + } + + /* it has optional message */ + if (vmcall->in_r14) { + uint64_t * tmp; + +#define GUEST_PANIC_INFO_TDX_MESSAGE_MAX 64 + message = g_malloc0(GUEST_PANIC_INFO_TDX_MESSAGE_MAX + 1); + + tmp = (uint64_t *)message; + /* The order is defined in TDX GHCI spec */ + *(tmp++) = cpu_to_le64(vmcall->in_r14); + *(tmp++) = cpu_to_le64(vmcall->in_r15); + *(tmp++) = cpu_to_le64(vmcall->in_rbx); + *(tmp++) = cpu_to_le64(vmcall->in_rdi); + *(tmp++) = cpu_to_le64(vmcall->in_rsi); + *(tmp++) = cpu_to_le64(vmcall->in_r8); + *(tmp++) = cpu_to_le64(vmcall->in_r9); + *(tmp++) = cpu_to_le64(vmcall->in_rdx); + message[GUEST_PANIC_INFO_TDX_MESSAGE_MAX] = '\0'; + assert((char *)tmp == message + GUEST_PANIC_INFO_TDX_MESSAGE_MAX); + } + + error_report("TD guest reports fatal error. %s\n", message ? : ""); + exit(1); +} + static void tdx_handle_setup_event_notify_interrupt(X86CPU *cpu, struct kvm_tdx_vmcall *vmcall) { @@ -1512,6 +1549,9 @@ static void tdx_handle_vmcall(X86CPU *cpu, struct kvm_tdx_vmcall *vmcall) case TDG_VP_VMCALL_GET_QUOTE: tdx_handle_get_quote(cpu, vmcall); break; + case TDG_VP_VMCALL_REPORT_FATAL_ERROR: + tdx_handle_report_fatal_error(cpu, vmcall); + break; case TDG_VP_VMCALL_SETUP_EVENT_NOTIFY_INTERRUPT: tdx_handle_setup_event_notify_interrupt(cpu, vmcall); break;