[patch 2/4] x86, vtd: fix the vt-d fault handling irq migration in the x2apic mode

[Suresh Siddha]

From: Kenji Kaneshige <kaneshige.kenji@xxxxxxxxxxxxxx>
Subject: x86, vtd: fix the vt-d fault handling irq migration in the x2apic mode

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@xxxxxxxxxxxxxx>
Signed-off-by: Suresh Siddha <suresh.b.siddha@xxxxxxxxx>
Cc: stable@xxxxxxxxxx [v2.6.32+]
---
 arch/x86/kernel/apic/io_apic.c |    2 ++
 1 file changed, 2 insertions(+)

Index: tip/arch/x86/kernel/apic/io_apic.c
===================================================================
--- tip.orig/arch/x86/kernel/apic/io_apic.c
+++ tip/arch/x86/kernel/apic/io_apic.c
@@ -3367,6 +3367,8 @@ dmar_msi_set_affinity(struct irq_data *d
 	msg.data |= MSI_DATA_VECTOR(cfg->vector);
 	msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK;
 	msg.address_lo |= MSI_ADDR_DEST_ID(dest);
+	if (x2apic_mode)
+		msg.address_hi = MSI_ADDR_BASE_HI | MSI_ADDR_EXT_DEST_ID(dest);
 
 	dmar_msi_write(irq, &msg);
 


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