Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752501AbYJOKnD (ORCPT ); Wed, 15 Oct 2008 06:43:03 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752207AbYJOKmv (ORCPT ); Wed, 15 Oct 2008 06:42:51 -0400 Received: from outbound-wa4.frontbridge.com ([216.32.181.16]:61274 "EHLO WA4EHSOBE005.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752189AbYJOKmu (ORCPT ); Wed, 15 Oct 2008 06:42:50 -0400 X-BigFish: VPS5(z34a4lzzzzzz32i6bh64h) X-Spam-TCS-SCL: 3:0 X-FB-SS: 5, X-WSS-ID: 0K8S0F3-01-L1L-01 Date: Wed, 15 Oct 2008 12:42:16 +0200 From: Andreas Herrmann To: stable@kernel.org CC: linux-kernel@vger.kernel.org, Ingo Molnar , Thomas Gleixner Subject: [PATCH 2/2][stable] x86: SB600: skip IRQ0 override if it is not routed to INT2 of IOAPIC Message-ID: <20081015104216.GC4706@alberich.amd.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline User-Agent: Mutt/1.5.16 (2007-06-09) X-OriginalArrivalTime: 15 Oct 2008 10:42:40.0477 (UTC) FILETIME=[BF4498D0:01C92EB2] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3292 Lines: 115 On some more HP laptops BIOS reports an IRQ0 override but the SB600 chipset is configured such that timer interrupts go to INT0 of IOAPIC. Check IRQ0 routing and if it is routed to INT0 of IOAPIC skip the timer override. See following bug reports: http://bugzilla.kernel.org/show_bug.cgi?id=11715 http://bugzilla.kernel.org/show_bug.cgi?id=11516 Signed-off-by: Andreas Herrmann --- arch/x86/kernel/early-quirks.c | 55 +++++++++++++++++++++++++++++++++++++-- 1 files changed, 52 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/early-quirks.c b/arch/x86/kernel/early-quirks.c index 733c4f8..3ce029f 100644 --- a/arch/x86/kernel/early-quirks.c +++ b/arch/x86/kernel/early-quirks.c @@ -95,7 +95,8 @@ static void __init nvidia_bugs(int num, int slot, int func) } -static u32 ati_ixp4x0_rev(int num, int slot, int func) +#if defined(CONFIG_ACPI) && defined(CONFIG_X86_IO_APIC) +static u32 __init ati_ixp4x0_rev(int num, int slot, int func) { u32 d; u8 b; @@ -115,7 +116,6 @@ static u32 ati_ixp4x0_rev(int num, int slot, int func) static void __init ati_bugs(int num, int slot, int func) { -#if defined(CONFIG_ACPI) && defined (CONFIG_X86_IO_APIC) u32 d; u8 b; @@ -138,9 +138,56 @@ static void __init ati_bugs(int num, int slot, int func) printk(KERN_INFO "If you got timer trouble " "try acpi_use_timer_override\n"); } -#endif } +static u32 __init ati_sbx00_rev(int num, int slot, int func) +{ + u32 old, d; + + d = read_pci_config(num, slot, func, 0x70); + old = d; + d &= ~(1<<8); + write_pci_config(num, slot, func, 0x70, d); + d = read_pci_config(num, slot, func, 0x8); + d &= 0xff; + write_pci_config(num, slot, func, 0x70, old); + + return d; +} + +static void __init ati_bugs_contd(int num, int slot, int func) +{ + u32 d, rev; + + if (acpi_use_timer_override) + return; + + rev = ati_sbx00_rev(num, slot, func); + if (rev > 0x13) + return; + + /* check for IRQ0 interrupt swap */ + d = read_pci_config(num, slot, func, 0x64); + if (!(d & (1<<14))) + acpi_skip_timer_override = 1; + + if (acpi_skip_timer_override) { + printk(KERN_INFO "SB600 revision 0x%x\n", rev); + printk(KERN_INFO "Ignoring ACPI timer override.\n"); + printk(KERN_INFO "If you got timer trouble " + "try acpi_use_timer_override\n"); + } +} +#else +static void __init ati_bugs(int num, int slot, int func) +{ +} + +static void __init ati_bugs_contd(int num, int slot, int func) +{ +} +#endif + #ifdef CONFIG_DMAR static void __init intel_g33_dmar(int num, int slot, int func) { @@ -176,6 +223,8 @@ static struct chipset early_qrk[] __initdata = { PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, fix_hypertransport_config }, { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_SMBUS, PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs }, + { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_SBX00_SMBUS, + PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs_contd }, #ifdef CONFIG_DMAR { PCI_VENDOR_ID_INTEL, 0x29c0, PCI_CLASS_BRIDGE_HOST, PCI_ANY_ID, 0, intel_g33_dmar }, -- 1.6.0.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/