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Subject[PATCH 2/5] 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(-)
Index: linux-2.6/arch/x86/kernel/apic/apic.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/apic/apic.c
+++ linux-2.6/arch/x86/kernel/apic/apic.c
@@ -1898,15 +1898,8 @@ void __cpuinit generic_processor_info(in
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)
Index: linux-2.6/arch/x86/kernel/apic/probe_64.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/apic/probe_64.c
+++ linux-2.6/arch/x86/kernel/apic/probe_64.c
@@ -67,17 +67,8 @@ void __init default_setup_apic_routing(v
}
#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);


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