Re: APIC version and 8-bit APIC IDs

[Siddha, Suresh B]

On Fri, Aug 12, 2005 at 04:57:25PM +0200, Andi Kleen wrote:
> On Fri, Aug 12, 2005 at 04:55:40PM +0200, Martin Wilck wrote:
> > I wrote:
> > 
> > >>How so? The XAPIC version check should work there.
> > >
> > >ACPI: LAPIC (acpi_id[0x11] lapic_id[0x21] enabled)
> > >Processor #33 15:4 APIC version 16
> > >ACPI: LAPIC (acpi_id[0x12] lapic_id[0x26] enabled)
> > >Processor #38 15:4 APIC version 16
> > 
> > Forget it. I have fallen prey to  this line:
> > 
> > 	processor.mpc_apicver = 0x10; /* TBD: lapic version */
> > 
> > in arch/x86_64/kernel/mpparse.c.
> > I am used to get correct answers from Linux :-)
> 
> Heh. Should probably fix that. Can you file a bug with the ACPI
> people on http://bugzilla.kernel.org ? (or do a patch?)

Here is the patch.

--
Fix the apic version that gets printed during boot. 

Signed-off-by: Suresh Siddha <suresh.b.siddha@xxxxxxxxx>

--- linux-2.6.13-rc6/arch/x86_64/kernel/mpparse.c~	2005-08-12 10:19:07.037696416 -0700
+++ linux-2.6.13-rc6/arch/x86_64/kernel/mpparse.c	2005-08-12 10:19:38.098974384 -0700
@@ -707,7 +707,7 @@
 
 	processor.mpc_type = MP_PROCESSOR;
 	processor.mpc_apicid = id;
-	processor.mpc_apicver = 0x10; /* TBD: lapic version */
+	processor.mpc_apicver = GET_APIC_VERSION(apic_read(APIC_LVR));
 	processor.mpc_cpuflag = (enabled ? CPU_ENABLED : 0);
 	processor.mpc_cpuflag |= (boot_cpu ? CPU_BOOTPROCESSOR : 0);
 	processor.mpc_cpufeature = (boot_cpu_data.x86 << 8) | 
-
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