| From | Andi Kleen <> | Subject | [PATCH] [92/139] x86, vt-d: Fix the vt-d fault handling irq migration in the x2apic mode | Date | Tue, 1 Feb 2011 16:44:50 -0800 (PST) |
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2.6.35-longterm review patch. If anyone has any objections, please let me know.
------------------ From: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
commit 086e8ced65d9bcc4a8e8f1cd39b09640f2883f90 upstream.
In x2apic mode, we need to set the upper address register of the fault handling interrupt register of the vt-d hardware. Without this irq migration of the vt-d fault handling interrupt is broken.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> LKML-Reference: <1291225233.2648.39.camel@sbsiddha-MOBL3> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Acked-by: Chris Wright <chrisw@sous-sol.org> Tested-by: Takao Indoh <indou.takao@jp.fujitsu.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
--- arch/x86/kernel/apic/io_apic.c | 1 + 1 file changed, 1 insertion(+)
Index: linux-2.6.35.y/arch/x86/kernel/apic/io_apic.c =================================================================== --- linux-2.6.35.y.orig/arch/x86/kernel/apic/io_apic.c +++ linux-2.6.35.y/arch/x86/kernel/apic/io_apic.c @@ -3626,6 +3626,7 @@ static int dmar_msi_set_affinity(unsigne msg.data |= MSI_DATA_VECTOR(cfg->vector); msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK; msg.address_lo |= MSI_ADDR_DEST_ID(dest); + msg.address_hi = MSI_ADDR_BASE_HI | MSI_ADDR_EXT_DEST_ID(dest); dmar_msi_write(irq, &msg);
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