This is a note to let you know that I've just added the patch titled
x86/iommu/vt-d: Expand interrupt remapping quirk to cover x58 chipset
to the 3.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
x86-iommu-vt-d-expand-interrupt-remapping-quirk-to-cover-x58-chipset.patch
and it can be found in the queue-3.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 803075dba31c17af110e1d9a915fe7262165b213 Mon Sep 17 00:00:00 2001
From: Neil Horman <nhorman@xxxxxxxxxxxxx>
Date: Wed, 17 Jul 2013 07:13:59 -0400
Subject: x86/iommu/vt-d: Expand interrupt remapping quirk to cover x58 chipset
From: Neil Horman <nhorman@xxxxxxxxxxxxx>
commit 803075dba31c17af110e1d9a915fe7262165b213 upstream.
Recently we added an early quirk to detect 5500/5520 chipsets
with early revisions that had problems with irq draining with
interrupt remapping enabled:
commit 03bbcb2e7e292838bb0244f5a7816d194c911d62
Author: Neil Horman <nhorman@xxxxxxxxxxxxx>
Date: Tue Apr 16 16:38:32 2013 -0400
iommu/vt-d: add quirk for broken interrupt remapping on 55XX chipsets
It turns out this same problem is present in the intel X58
chipset as well. See errata 69 here:
http://www.intel.com/content/www/us/en/chipsets/x58-express-specification-update.html
This patch extends the pci early quirk so that the chip
devices/revisions specified in the above update are also covered
in the same way:
Signed-off-by: Neil Horman <nhorman@xxxxxxxxxxxxx>
Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Donald Dutile <ddutile@xxxxxxxxxx>
Cc: Joerg Roedel <joro@xxxxxxxxxx>
Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Cc: Malcolm Crossley <malcolm.crossley@xxxxxxxxxx>
Cc: Prarit Bhargava <prarit@xxxxxxxxxx>
Cc: Don Zickus <dzickus@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1374059639-8631-1-git-send-email-nhorman@xxxxxxxxxxxxx
[ Small edits. ]
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kernel/early-quirks.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
--- a/arch/x86/kernel/early-quirks.c
+++ b/arch/x86/kernel/early-quirks.c
@@ -196,15 +196,23 @@ static void __init ati_bugs_contd(int nu
static void __init intel_remapping_check(int num, int slot, int func)
{
u8 revision;
+ u16 device;
+ device = read_pci_config_16(num, slot, func, PCI_DEVICE_ID);
revision = read_pci_config_byte(num, slot, func, PCI_REVISION_ID);
/*
- * Revision 0x13 of this chipset supports irq remapping
- * but has an erratum that breaks its behavior, flag it as such
+ * Revision 13 of all triggering devices id in this quirk have
+ * a problem draining interrupts when irq remapping is enabled,
+ * and should be flagged as broken. Additionally revisions 0x12
+ * and 0x22 of device id 0x3405 has this problem.
*/
if (revision == 0x13)
set_irq_remapping_broken();
+ else if ((device == 0x3405) &&
+ ((revision == 0x12) ||
+ (revision == 0x22)))
+ set_irq_remapping_broken();
}
@@ -239,6 +247,8 @@ static struct chipset early_qrk[] __init
PCI_CLASS_SERIAL_SMBUS, PCI_ANY_ID, 0, ati_bugs_contd },
{ PCI_VENDOR_ID_INTEL, 0x3403, PCI_CLASS_BRIDGE_HOST,
PCI_BASE_CLASS_BRIDGE, 0, intel_remapping_check },
+ { PCI_VENDOR_ID_INTEL, 0x3405, PCI_CLASS_BRIDGE_HOST,
+ PCI_BASE_CLASS_BRIDGE, 0, intel_remapping_check },
{ PCI_VENDOR_ID_INTEL, 0x3406, PCI_CLASS_BRIDGE_HOST,
PCI_BASE_CLASS_BRIDGE, 0, intel_remapping_check },
{}
Patches currently in stable-queue which might be from nhorman@xxxxxxxxxxxxx are
queue-3.10/x86-iommu-vt-d-expand-interrupt-remapping-quirk-to-cover-x58-chipset.patch
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