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    SubjectRE: invalid SMP mptable on Toshiba Satellite 2430-301
    Date
    From
    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@vger.kernel.org [mailto:linux-kernel-
    > owner@vger.kernel.org] On Behalf Of Jochen Voss
    > Sent: Thursday, November 13, 2003 10:45 AM
    > To: Linus Torvalds
    > Cc: linux-kernel@vger.kernel.org
    > 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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