From patchwork Fri Mar 17 19:53:32 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliott Mitchell X-Patchwork-Id: 13310857 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.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 820AFEB64DA for ; Wed, 12 Jul 2023 20:04:04 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.562779.879562 (Exim 4.92) (envelope-from ) id 1qJg3u-0005EF-6o; Wed, 12 Jul 2023 20:03:46 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 562779.879562; Wed, 12 Jul 2023 20:03:46 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1qJg3u-0005E8-3h; Wed, 12 Jul 2023 20:03:46 +0000 Received: by outflank-mailman (input) for mailman id 562779; Wed, 12 Jul 2023 20:03:45 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1qJg3t-0004Xs-EF for xen-devel@lists.xenproject.org; Wed, 12 Jul 2023 20:03:45 +0000 Received: from mailhost.m5p.com (mailhost.m5p.com [74.104.188.4]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id 342e8050-20ef-11ee-b239-6b7b168915f2; Wed, 12 Jul 2023 22:03:44 +0200 (CEST) Received: from m5p.com (mailhost.m5p.com [IPv6:2001:470:1f07:15ff:0:0:0:f7]) by mailhost.m5p.com (8.16.1/8.15.2) with ESMTPS id 36CK3Xjx091919 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NO); Wed, 12 Jul 2023 16:03:39 -0400 (EDT) (envelope-from ehem@m5p.com) Received: (from ehem@localhost) by m5p.com (8.16.1/8.15.2/Submit) id 36CK3XCk091918; Wed, 12 Jul 2023 13:03:33 -0700 (PDT) (envelope-from ehem) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 342e8050-20ef-11ee-b239-6b7b168915f2 Message-Id: <7771343b52e6769d7670ad73094f5276025a10fe.1689191941.git.ehem+xen@m5p.com> In-Reply-To: References: From: Elliott Mitchell To: xen-devel@lists.xenproject.org Cc: Jan Beulich Cc: Andrew Cooper Cc: =?unknown-8bit?b?IlJvZ2VyIFBhdSBNb25uw6kiIDxyb2dlci5wYXVAY2l0cml4LmNv?= =?unknown-8bit?b?bT4=?= Cc: Wei Liu Date: Fri, 17 Mar 2023 12:53:32 -0700 Subject: [PATCH v3 2/3] x86/APIC: modify error_interrupt() to output using single printk() This takes care of the issue of APIC errors tending to occur on multiple cores at once. In turn this tends to causes the error messages to be merged together, making understanding them difficult. Signed-off-by: Elliott Mitchell Acked-by: Jan Beulich --- v2: Splitting the loop adjustment off. Fixing the entry display order. --- xen/arch/x86/apic.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/xen/arch/x86/apic.c b/xen/arch/x86/apic.c index 8cfb8cd71c..5b830b2312 100644 --- a/xen/arch/x86/apic.c +++ b/xen/arch/x86/apic.c @@ -1410,6 +1410,7 @@ static void cf_check error_interrupt(struct cpu_user_regs *regs) ", Received illegal vector", ", Illegal register address", }; + const char *entries[ARRAY_SIZE(esr_fields)]; unsigned int v, v1; int i; @@ -1419,12 +1420,13 @@ static void cf_check error_interrupt(struct cpu_user_regs *regs) v1 = apic_read(APIC_ESR); ack_APIC_irq(); - printk(XENLOG_DEBUG "APIC error on CPU%u: %02x(%02x)", - smp_processor_id(), v , v1); for ( i = 7; i >= 0; --i ) - if ( v1 & (1 << i) ) - printk("%s", esr_fields[i]); - printk("\n"); + entries[i] = v1 & (1 << i) ? esr_fields[i] : ""; + printk(XENLOG_DEBUG "APIC error on CPU%u: %02x(%02x)" + "%s%s%s%s%s%s%s%s" "\n", + smp_processor_id(), v , v1, + entries[7], entries[6], + entries[5], entries[4], entries[3], entries[2], entries[1], entries[0]); } /*