lkml.org 
[lkml]   [2008]   [May]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] x86: fix APIC warning on 32bit v2
Date

for
http://bugzilla.kernel.org/show_bug.cgi?id=10613

BIOS bug, APIC version is 0 for CPU#0! fixing up to 0x10. (tell your hw vendor)

v2: fix 64 bit compilation

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>

Index: linux-2.6/arch/x86/kernel/acpi/boot.c
===================================================================
--- linux-2.6.orig/arch/x86/kernel/acpi/boot.c
+++ linux-2.6/arch/x86/kernel/acpi/boot.c
@@ -242,12 +242,19 @@ static int __init acpi_parse_madt(struct

static void __cpuinit acpi_register_lapic(int id, u8 enabled)
{
+ unsigned int ver = 0;
+
if (!enabled) {
++disabled_cpus;
return;
}

- generic_processor_info(id, 0);
+#ifdef CONFIG_X86_32
+ if (boot_cpu_physical_apicid != -1U)
+ ver = apic_version[boot_cpu_physical_apicid];
+#endif
+
+ generic_processor_info(id, ver);
}

static int __init
@@ -763,8 +770,13 @@ static void __init acpi_register_lapic_a
mp_lapic_addr = address;

set_fixmap_nocache(FIX_APIC_BASE, address);
- if (boot_cpu_physical_apicid == -1U)
+ if (boot_cpu_physical_apicid == -1U) {
boot_cpu_physical_apicid = GET_APIC_ID(read_apic_id());
+#ifdef CONFIG_X86_32
+ apic_version[boot_cpu_physical_apicid] =
+ GET_APIC_VERSION(apic_read(APIC_LVR));
+#endif
+ }
}

static int __init early_acpi_parse_madt_lapic_addr_ovr(void)

\
 
 \ /
  Last update: 2008-05-23 03:25    [W:0.039 / U:0.176 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site