RE: invalid SMP mptable on Toshiba Satellite 2430-301

[Nakajima, Jun]

Which kernel is this? In 2.6 we don't look at the MPS table if ACPI is
available. Or ACPI detection is failing?

	Jun

> -----Original Message-----
> From: linux-kernel-owner@xxxxxxxxxxxxxxx [mailto:linux-kernel-
> owner@xxxxxxxxxxxxxxx] On Behalf Of Jochen Voss
> Sent: Thursday, November 13, 2003 10:45 AM
> To: Linus Torvalds
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> Subject: Re: invalid SMP mptable on Toshiba Satellite 2430-301
> 
> Hello,
> 
> On Thu, Nov 13, 2003 at 10:13:08AM -0800, Linus Torvalds wrote:
> > Hmm.. Do you have ACPI enabled? We really shouldn't need the MP
table if
> > the information is elsewhere, but the mptable assumptions might be a
bit
> > entrenched.
> 
> With SMP and ACPI enabled I get the following kernel
> boot messages
> 
>     Intel MultiProcessor Specification v1.4
> 	Virtual Wire compatibility mode.
>     SMP mptable: bad signature [0x0]!
>     BIOS bug, MP table errors detected!...
>     ... disabling SMP support. (tell your hw vendor)
> 
> The last message is generated by the following code
> in arch/i386/kernel/mpparse.c:
> 
>     if (!smp_read_mpc((void *)mpf->mpf_physptr)) {
>         smp_found_config = 0;
>         printk(KERN_ERR "BIOS bug, MP table errors detected!...\n");
>         printk(KERN_ERR "... disabling SMP support. (tell your hw
> vendor)\n");
>         return;
>     }
> 
> I don't know what effects are caused by the 'smp_found_config = 0',
> but later-on the following messages appear:
> 
>     No local APIC present or hardware disabled
>     ...
>     CPU:     After generic identify, caps: bfebf9ff 00000000 00000000
> 00000000
>     CPU:     After vendor identify, caps: bfebf9ff 00000000 00000000
> 00000000
>     CPU: Trace cache: 12K uops, L1 D cache: 8K
>     CPU: L2 cache: 512K
>     CPU: Hyper-Threading is disabled
>     CPU:     After all inits, caps: bfebf9ff 00000000 00000000
00000080
>     ...
>     SMP motherboard not detected.
>     Local APIC not detected. Using dummy APIC emulation.
>     Starting migration thread for cpu 0
>     CPUS done 4
> 
> I hope this helps,
> Jochen
> --
> http://seehuhn.de/
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