diff options
| author | David Woodhouse <dwmw2@infradead.org> | 2006-10-01 17:55:53 +0100 |
|---|---|---|
| committer | David Woodhouse <dwmw2@infradead.org> | 2006-10-01 17:55:53 +0100 |
| commit | 8a84fc15ae5cafcc366dd85cf8e1ab2040679abc (patch) | |
| tree | 5d8dce194c9667fa92e9ec9f545cec867a9a1e0d /arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c | |
| parent | 28b79ff9661b22e4c41c0d00d4ab8503e810f13d (diff) | |
| parent | 82965addad66fce61a92c5f03104ea90b0b87124 (diff) | |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Manually resolve conflict in include/mtd/Kbuild
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c')
| -rw-r--r-- | arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c | 42 |
1 files changed, 41 insertions, 1 deletions
diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c b/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c index b77f1358bd7..e8993baf3d1 100644 --- a/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c +++ b/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c @@ -23,6 +23,7 @@ #ifdef CONFIG_X86_SPEEDSTEP_CENTRINO_ACPI #include <linux/acpi.h> +#include <linux/dmi.h> #include <acpi/processor.h> #endif @@ -377,6 +378,35 @@ static int centrino_cpu_early_init_acpi(void) return 0; } + +/* + * Some BIOSes do SW_ANY coordination internally, either set it up in hw + * or do it in BIOS firmware and won't inform about it to OS. If not + * detected, this has a side effect of making CPU run at a different speed + * than OS intended it to run at. Detect it and handle it cleanly. + */ +static int bios_with_sw_any_bug; +static int sw_any_bug_found(struct dmi_system_id *d) +{ + bios_with_sw_any_bug = 1; + return 0; +} + + +static struct dmi_system_id sw_any_bug_dmi_table[] = { + { + .callback = sw_any_bug_found, + .ident = "Supermicro Server X6DLP", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Supermicro"), + DMI_MATCH(DMI_BIOS_VERSION, "080010"), + DMI_MATCH(DMI_PRODUCT_NAME, "X6DLP"), + }, + }, + { } +}; + + /* * centrino_cpu_init_acpi - register with ACPI P-States library * @@ -398,14 +428,24 @@ static int centrino_cpu_init_acpi(struct cpufreq_policy *policy) dprintk(PFX "obtaining ACPI data failed\n"); return -EIO; } + policy->shared_type = p->shared_type; /* * Will let policy->cpus know about dependency only when software * coordination is required. */ if (policy->shared_type == CPUFREQ_SHARED_TYPE_ALL || - policy->shared_type == CPUFREQ_SHARED_TYPE_ANY) + policy->shared_type == CPUFREQ_SHARED_TYPE_ANY) { policy->cpus = p->shared_cpu_map; + } + +#ifdef CONFIG_SMP + dmi_check_system(sw_any_bug_dmi_table); + if (bios_with_sw_any_bug && cpus_weight(policy->cpus) == 1) { + policy->shared_type = CPUFREQ_SHARED_TYPE_ALL; + policy->cpus = cpu_core_map[cpu]; + } +#endif /* verify the acpi_data */ if (p->state_count <= 1) { |