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    Subject[PATCH 34/37] x86: using logical flat for amd cpu too.
    not sure it works again, could be bios fix the irq routing dest ?

    tested that amd support logical flat too when cpus num <= 8 and even
    bsp apic id > 8

    so could remove vendor check...

    Signed-off-by: Yinghai Lu <yinghai@kernel.org>
    ---
    arch/x86/kernel/apic/apic.c | 11 ++---------
    arch/x86/kernel/apic/probe_64.c | 13 ++-----------
    2 files changed, 4 insertions(+), 20 deletions(-)

    diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
    index aa57c07..c5f4906 100644
    --- a/arch/x86/kernel/apic/apic.c
    +++ b/arch/x86/kernel/apic/apic.c
    @@ -1898,15 +1898,8 @@ void __cpuinit generic_processor_info(int apicid, int version)
    max_physical_apicid = apicid;

    #ifdef CONFIG_X86_32
    - switch (boot_cpu_data.x86_vendor) {
    - case X86_VENDOR_INTEL:
    - if (num_processors > 8)
    - def_to_bigsmp = 1;
    - break;
    - case X86_VENDOR_AMD:
    - if (max_physical_apicid >= 8)
    - def_to_bigsmp = 1;
    - }
    + if (num_processors > 8)
    + def_to_bigsmp = 1;
    #endif

    #if defined(CONFIG_SMP) || defined(CONFIG_X86_64)
    diff --git a/arch/x86/kernel/apic/probe_64.c b/arch/x86/kernel/apic/probe_64.c
    index c4cbd30..0a428dd 100644
    --- a/arch/x86/kernel/apic/probe_64.c
    +++ b/arch/x86/kernel/apic/probe_64.c
    @@ -67,17 +67,8 @@ void __init default_setup_apic_routing(void)
    }
    #endif

    - if (apic == &apic_flat) {
    - switch (boot_cpu_data.x86_vendor) {
    - case X86_VENDOR_INTEL:
    - if (num_processors > 8)
    - apic = &apic_physflat;
    - break;
    - case X86_VENDOR_AMD:
    - if (max_physical_apicid >= 8)
    - apic = &apic_physflat;
    - }
    - }
    + if (apic == &apic_flat && num_processors > 8)
    + apic = &apic_physflat;

    printk(KERN_INFO "Setting APIC routing to %s\n", apic->name);

    --
    1.6.4.2


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