From patchwork Mon Apr 10 08:14:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Li, Xin3" X-Patchwork-Id: 13206179 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 4B286C76196 for ; Mon, 10 Apr 2023 08:41:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229482AbjDJIls (ORCPT ); Mon, 10 Apr 2023 04:41:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49576 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229716AbjDJIlK (ORCPT ); Mon, 10 Apr 2023 04:41:10 -0400 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0539540D9; Mon, 10 Apr 2023 01:41:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1681116068; x=1712652068; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=CKPdbZePoSn8pAkjI3IJ+p0apbz+y9vUOwaC2M88CbM=; b=QNEa48xuXVShKlXTtrOpI3V/yV3Mg+Funib0bM1/+kkHydBGNe/8oIQI zGw5Eao2vixIlIH959HxFRdhOGlo3mZOMu9eIAzFgLBxf+OB6NKP9855x QC7uBP9bjj921Qna8vPSZ1U9X+Fyfxi26pkBc6mKNcldtVmsCGCeoIhjp h3Rc8qX09EHuYY+k/BJk/BzMb/d/S9jGHGAPD9570wHeBjO5xTewOJrUP kgiPk9m6bwY1sAmpOpv7QmX8AZfQEIWTv6JXN1B+7ByyP6Vbe6QdFtEd/ CH65Umi9+JJtbIg3hKKlhBX9FIsPS//ZkYXlwPuQCppysJV5iVj6rZdTB w==; X-IronPort-AV: E=McAfee;i="6600,9927,10675"; a="342078068" X-IronPort-AV: E=Sophos;i="5.98,333,1673942400"; d="scan'208";a="342078068" Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Apr 2023 01:41:05 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10675"; a="799436315" X-IronPort-AV: E=Sophos;i="5.98,333,1673942400"; d="scan'208";a="799436315" Received: from unknown (HELO fred..) ([172.25.112.68]) by fmsmga002.fm.intel.com with ESMTP; 10 Apr 2023 01:41:05 -0700 From: Xin Li To: linux-kernel@vger.kernel.org, x86@kernel.org, kvm@vger.kernel.org Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, peterz@infradead.org, andrew.cooper3@citrix.com, seanjc@google.com, pbonzini@redhat.com, ravi.v.shankar@intel.com, jiangshanlai@gmail.com, shan.kang@intel.com Subject: [PATCH v8 19/33] x86/fred: add a machine check entry stub for FRED Date: Mon, 10 Apr 2023 01:14:24 -0700 Message-Id: <20230410081438.1750-20-xin3.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230410081438.1750-1-xin3.li@intel.com> References: <20230410081438.1750-1-xin3.li@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add a machine check entry stub for FRED. Tested-by: Shan Kang Signed-off-by: Xin Li --- Changes since v5: * Disallow #DB inside #MCE for robustness sake (Peter Zijlstra). --- arch/x86/include/asm/fred.h | 1 + arch/x86/kernel/cpu/mce/core.c | 15 +++++++++++++++ 2 files changed, 16 insertions(+) diff --git a/arch/x86/include/asm/fred.h b/arch/x86/include/asm/fred.h index 9ce2a6439091..61048aa4e01d 100644 --- a/arch/x86/include/asm/fred.h +++ b/arch/x86/include/asm/fred.h @@ -102,6 +102,7 @@ typedef DECLARE_FRED_HANDLER((*fred_handler)); DECLARE_FRED_HANDLER(fred_exc_nmi); DECLARE_FRED_HANDLER(fred_exc_debug); DECLARE_FRED_HANDLER(fred_exc_page_fault); +DECLARE_FRED_HANDLER(fred_exc_machine_check); #endif /* __ASSEMBLY__ */ diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c index 2eec60f50057..859331a6a7ad 100644 --- a/arch/x86/kernel/cpu/mce/core.c +++ b/arch/x86/kernel/cpu/mce/core.c @@ -52,6 +52,7 @@ #include #include #include +#include #include "internal.h" @@ -2111,6 +2112,20 @@ DEFINE_IDTENTRY_MCE_USER(exc_machine_check) exc_machine_check_user(regs); local_db_restore(dr7); } + +#ifdef CONFIG_X86_FRED +DEFINE_FRED_HANDLER(fred_exc_machine_check) +{ + unsigned long dr7; + + dr7 = local_db_save(); + if (user_mode(regs)) + exc_machine_check_user(regs); + else + exc_machine_check_kernel(regs); + local_db_restore(dr7); +} +#endif #else /* 32bit unified entry point */ DEFINE_IDTENTRY_RAW(exc_machine_check)