From patchwork Tue Mar 7 02:39:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Li, Xin3" X-Patchwork-Id: 13162695 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 2872BC6FA99 for ; Tue, 7 Mar 2023 03:06:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230446AbjCGDGv (ORCPT ); Mon, 6 Mar 2023 22:06:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42842 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230340AbjCGDGA (ORCPT ); Mon, 6 Mar 2023 22:06:00 -0500 Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BCC5A80E16; Mon, 6 Mar 2023 19:05:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1678158331; x=1709694331; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Y8+C0nkNS1GRT0vpQmI78TLcU0TSh7ChvDXpWBoU34k=; b=cSNwpb6hv1Tte6ZVpw8etzk4/PBVO4fSKejgAwXHs9RyM3FVlijrUP2n lX+cpFZblSEE8At0il4LV52gb5TslkquqExGrvWYWhP22jy+APNVpbp/i eEIADWxfMl8uI3YjSf1j9C/Liv6hGr0kQ35Fef7/N/NINNDoaRydooxqf yqwne5awFi3DTNBYJH7yKh56HyUmMxNBMLDHcqCNbIKo+Z9aMa6WJDasi iYNEMd+x1QCA46ewJ+z0L9TfTUfq/VQbgl9b3GkQPDBy99xHQJ9BVGAoF h9jWErd5LRYQjL9fe7rIw5A6qXmZERXrD8mtfKzxg9KUtwn0k7N6cXKCt w==; X-IronPort-AV: E=McAfee;i="6500,9779,10641"; a="338072497" X-IronPort-AV: E=Sophos;i="5.98,238,1673942400"; d="scan'208";a="338072497" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Mar 2023 19:05:18 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6500,9779,10641"; a="676409852" X-IronPort-AV: E=Sophos;i="5.98,238,1673942400"; d="scan'208";a="676409852" Received: from unknown (HELO fred..) ([172.25.112.68]) by orsmga002.jf.intel.com with ESMTP; 06 Mar 2023 19:05:18 -0800 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 Subject: [PATCH v5 20/34] x86/fred: add a machine check entry stub for FRED Date: Mon, 6 Mar 2023 18:39:32 -0800 Message-Id: <20230307023946.14516-21-xin3.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230307023946.14516-1-xin3.li@intel.com> References: <20230307023946.14516-1-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. Unlike IDT, no need to save/restore dr7 in FRED machine check handler. Tested-by: Shan Kang Signed-off-by: Xin Li --- arch/x86/include/asm/fred.h | 1 + arch/x86/kernel/cpu/mce/core.c | 11 +++++++++++ 2 files changed, 12 insertions(+) diff --git a/arch/x86/include/asm/fred.h b/arch/x86/include/asm/fred.h index f928a03082af..54746e8c0a17 100644 --- a/arch/x86/include/asm/fred.h +++ b/arch/x86/include/asm/fred.h @@ -97,6 +97,7 @@ 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 7832a69d170e..26fa7fa44f30 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 +2112,16 @@ 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) +{ + if (user_mode(regs)) + exc_machine_check_user(regs); + else + exc_machine_check_kernel(regs); +} +#endif #else /* 32bit unified entry point */ DEFINE_IDTENTRY_RAW(exc_machine_check)