x64, x2apic/intr-remap: Interrupt-remapping and x2apic support, fix

Yinghai Lu wrote:

> Setting APIC routing to physical flat
> Kernel panic - not syncing: Boot APIC ID in local APIC unexpected (0 vs 4)
> Pid: 1, comm: swapper Not tainted 2.6.26-rc9-tip-01763-g74f94b1-dirty #320
>
> Call Trace:
>  [<ffffffff80a21505>] ? set_cpu_sibling_map+0x38c/0x3bd
>  [<ffffffff80245215>] ? read_xapic_id+0x25/0x3e
>  [<ffffffff80e5a2c3>] ? verify_local_APIC+0x139/0x1b9
>  [<ffffffff80245215>] ? read_xapic_id+0x25/0x3e
>  [<ffffffff80e589af>] ? native_smp_prepare_cpus+0x224/0x2e9
>  [<ffffffff80e4881a>] ? kernel_init+0x64/0x341
>  [<ffffffff8022a439>] ? child_rip+0xa/0x11
>  [<ffffffff80e487b6>] ? kernel_init+0x0/0x341
>  [<ffffffff8022a42f>] ? child_rip+0x0/0x11
>
>
> guess read_apic_id changing cuase some problem...

genapic's read_apic_id() returns the actual apic id extracted from
the APIC_ID register. And in some cases like UV, read_apic_id()
returns completely different values from APIC ID register.

Use the native apic register read, rather than genapic read_apic_id()
in verify_local_APIC()

And also, lapic_suspend() should also use native apic register read.

Reported-by: Yinghai Lu <[email protected]>
Signed-off-by: Suresh Siddha <[email protected]>
Cc: "[email protected]" <[email protected]>
Cc: "[email protected]" <[email protected]>
Cc: "[email protected]" <[email protected]>
Cc: "[email protected]" <[email protected]>
Cc: "[email protected]" <[email protected]>
Cc: "[email protected]" <[email protected]>
Cc: "[email protected]" <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>

0 files changed, 0 insertions, 0 deletions