From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754888Ab1AFDaV (ORCPT ); Wed, 5 Jan 2011 22:30:21 -0500 Received: from mga14.intel.com ([143.182.124.37]:3908 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754159Ab1AFDaH (ORCPT ); Wed, 5 Jan 2011 22:30:07 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.60,281,1291622400"; d="scan'208";a="370721451" From: Youquan Song To: linux-kernel@vger.kernel.org, hpa@linux.intel.com, suresh.b.siddha@intel.com Cc: arjan@linux.intel.com, trenn@suse.de, kent.liu@intel.com, chaohong.guo@intel.com, Youquan Song , Youquan Song Subject: [PATCH 2/2] apic: Add print error interrupt reason Date: Thu, 6 Jan 2011 11:28:52 +0800 Message-Id: <1294284532-24285-3-git-send-email-youquan.song@intel.com> X-Mailer: git-send-email 1.6.4.2 In-Reply-To: <1294284532-24285-2-git-send-email-youquan.song@intel.com> References: <1294284532-24285-1-git-send-email-youquan.song@intel.com> <1294284532-24285-2-git-send-email-youquan.song@intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org End user worry about the error interrupt information and intend to know what kind of error interrupts are generated, so this patch add printing out the detail debug information of error interrupt. Signed-off-by: Youquan Song --- arch/x86/kernel/apic/apic.c | 28 +++++++++++++++++++++++++++- 1 files changed, 27 insertions(+), 1 deletions(-) diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 3f838d5..f5538d5 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -1794,6 +1794,31 @@ void smp_spurious_interrupt(struct pt_regs *regs) irq_exit(); } +static const char *error_interrupt_reason[] = { + "Send CS error", + "Receive CS error", + "Send accept error", + "Receive accept error", + "Redirectable IPI", + "Send illegal vector", + "Received illegal vector", + "Illegal register address", +}; + +static void print_error_interrupt_reason(u32 reason) +{ + u32 i = 0; + reason = reason & 0xff; + do { + if (reason & 0x1) + pr_debug(" : %s", error_interrupt_reason[i]); + i++; + reason >>= 1; + } while (reason > 0); + + pr_debug("\n"); +} + /* * This interrupt should never happen with our APIC/SMP architecture */ @@ -1821,8 +1846,9 @@ void smp_error_interrupt(struct pt_regs *regs) * 6: Received illegal vector * 7: Illegal register address */ - pr_debug("APIC error on CPU%d: %02x(%02x)\n", + pr_debug("APIC error on CPU%d: %02x(%02x)", smp_processor_id(), v , v1); + print_error_interrupt_reason(v1); irq_exit(); } -- 1.6.4.2