lkml.org 
[lkml]   [2008]   [Sep]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] x86: do_boot_cpu - check for ESR apic register presence before touching
[Yinghai Lu - Mon, Sep 15, 2008 at 09:25:14AM -0700]
| On Mon, Sep 15, 2008 at 9:22 AM, Cyrill Gorcunov <gorcunov@gmail.com> wrote:
| > [Yinghai Lu - Mon, Sep 15, 2008 at 09:12:37AM -0700]
| > | On Mon, Sep 15, 2008 at 8:05 AM, Cyrill Gorcunov <gorcunov@gmail.com> wrote:
| > | > We should check first if there is ESR register before read/write it.
| > | >
| > | > Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
| > | > ---
| > | >
| > | > Please review and test if possible. Thanks.
| > | >
| > | > Index: linux-2.6.git/arch/x86/kernel/smpboot.c
| > | > ===================================================================
| > | > --- linux-2.6.git.orig/arch/x86/kernel/smpboot.c 2008-09-14 21:49:36.000000000 +0400
| > | > +++ linux-2.6.git/arch/x86/kernel/smpboot.c 2008-09-15 18:30:37.000000000 +0400
| > | > @@ -893,8 +893,10 @@ do_rest:
| > | > /*
| > | > * Be paranoid about clearing APIC errors.
| > | > */
| > | > - apic_write(APIC_ESR, 0);
| > | > - apic_read(APIC_ESR);
| > | > + if (APIC_INTEGRATED(apic_version[phys_apicid])) {
| > | > + apic_write(APIC_ESR, 0);
| > | > + apic_read(APIC_ESR);
| > | > + }
| > | > }
| > | >
| > | > /*
| > | >
| > |
| > | maybe unrelated. Do we need to keep apic_version array?
| > |
| > | YH
| > |
| >
| > as I see ACPI/MP parsing code use it - actually I think we could
| > bring another variable - but don't think it worth it. Anyway
| > we have to get APIC info from these tables and save it somwhere
| > maybe in this array or maybe in another variable. Or you mean
| > anything else that I missed?
|
| one apic_version or boot_cpu_apic_version could be enough.
|
| YH
|

Yinghai I didn't check it - if you find it convenient -
I'll not object against... Maciej?

- Cyrill -


\
 
 \ /
  Last update: 2008-09-15 18:33    [W:0.039 / U:46.712 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site