lkml.org 
[lkml]   [2012]   [Apr]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v2 1/1] x86: Use x2apic physical mode based on FADT setting
    Date
    Provide systems that do not support x2apic cluster mode
    a mechanism to select x2apic physical mode using the
    FADT FORCE_APIC_PHYSICAL_DESTINATION_MODE bit.

    Changes from v1: (based on Suresh's comments)
    - removed #ifdef CONFIG_ACPI
    - removed #include <linux/acpi.h>

    Signed-off-by: Greg Pearson <greg.pearson@hp.com>
    ---
    arch/x86/kernel/apic/x2apic_phys.c | 6 ++++++
    1 files changed, 6 insertions(+), 0 deletions(-)

    diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2apic_phys.c
    index 8a778db..991e315 100644
    --- a/arch/x86/kernel/apic/x2apic_phys.c
    +++ b/arch/x86/kernel/apic/x2apic_phys.c
    @@ -24,6 +24,12 @@ static int x2apic_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
    {
    if (x2apic_phys)
    return x2apic_enabled();
    + else if ((acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) &&
    + (acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL) &&
    + x2apic_enabled()) {
    + printk(KERN_DEBUG "System requires x2apic physical mode\n");
    + return 1;
    + }
    else
    return 0;
    }
    --
    1.7.5.4


    \
     
     \ /
      Last update: 2012-04-25 02:27    [W:0.024 / U:34.068 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site