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    Subject[34-longterm 180/209] x86, vt-d: Fix the vt-d fault handling irq migration in the x2apic mode
    Date
    From: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>

    =====================================================================
    | This is a commit scheduled for the next v2.6.34 longterm release. |
    | If you see a problem with using this for longterm, please comment.|
    =====================================================================

    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>
    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: Paul Gortmaker <paul.gortmaker@windriver.com>
    ---
    arch/x86/kernel/apic/io_apic.c | 1 +
    1 files changed, 1 insertions(+), 0 deletions(-)

    diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
    index 38128cc..4a809bf 100644
    --- a/arch/x86/kernel/apic/io_apic.c
    +++ b/arch/x86/kernel/apic/io_apic.c
    @@ -3642,6 +3642,7 @@ static int dmar_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
    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);

    --
    1.7.4.4


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