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authorPatrick Georgi <patrick@georgi-clan.de>2011-10-14 23:02:57 +0200
committerStefan Reinauer <stefan.reinauer@coreboot.org>2011-10-27 19:09:29 +0200
commit07b4215e11537bcbef3848bb520fa201fbcc4eda (patch)
tree12d1c409c17cbab6ba8a09a33f0f21311f0b33e4 /src/arch/x86/boot
parente572ef6136114c3cac09b061c6888e44d39d36a5 (diff)
Move linux 2.6.11 workaround to generic code
Linux 2.6.11 seems to require a certain order in CPUs listed in mptable, so enforce it. This was only done on arima/hdama, but now is generic. Unfortunately this is somewhat slow. Change-Id: I85715ebae8a009cb816bc9ffd6372708f246bf66 Signed-off-by: Patrick Georgi <patrick@georgi-clan.de> Reviewed-on: http://review.coreboot.org/280 Tested-by: build bot (Jenkins) Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Diffstat (limited to 'src/arch/x86/boot')
-rw-r--r--src/arch/x86/boot/mpspec.c15
1 files changed, 11 insertions, 4 deletions
diff --git a/src/arch/x86/boot/mpspec.c b/src/arch/x86/boot/mpspec.c
index 209e0bbdbd..d519cfaacc 100644
--- a/src/arch/x86/boot/mpspec.c
+++ b/src/arch/x86/boot/mpspec.c
@@ -134,6 +134,7 @@ void smp_write_processor(struct mp_config_table *mc,
void smp_write_processors(struct mp_config_table *mc)
{
int boot_apic_id;
+ int order_id;
unsigned apic_version;
unsigned cpu_features;
unsigned cpu_feature_flags;
@@ -145,6 +146,8 @@ void smp_write_processors(struct mp_config_table *mc)
result = cpuid(1);
cpu_features = result.eax;
cpu_feature_flags = result.edx;
+ /* order the output of the cpus to fix a bug in kernel 2.6.11 */
+ for(order_id = 0;order_id <256; order_id++) {
for(cpu = all_devices; cpu; cpu = cpu->next) {
unsigned long cpu_flag;
if ((cpu->path.type != DEVICE_PATH_APIC) ||
@@ -159,10 +162,14 @@ void smp_write_processors(struct mp_config_table *mc)
if (boot_apic_id == cpu->path.apic.apic_id) {
cpu_flag = MPC_CPU_ENABLED | MPC_CPU_BOOTPROCESSOR;
}
- smp_write_processor(mc,
- cpu->path.apic.apic_id, apic_version,
- cpu_flag, cpu_features, cpu_feature_flags
- );
+ if(cpu->path.apic.apic_id == order_id) {
+ smp_write_processor(mc,
+ cpu->path.apic.apic_id, apic_version,
+ cpu_flag, cpu_features, cpu_feature_flags
+ );
+ break;
+ }
+ }
}
}