diff options
| author | Ingo Molnar <mingo@kernel.org> | 2012-03-26 17:18:44 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-03-26 17:19:03 +0200 |
| commit | 7fd52392c56361a40f0c630a82b36b95ca31eac6 (patch) | |
| tree | 14091de24c6b28ea4cae9826f98aeedb7be091f5 /drivers/cpufreq/powernow-k8.c | |
| parent | b01c3a0010aabadf745f3e7fdb9cab682e0a28a2 (diff) | |
| parent | e22057c8599373e5caef0bc42bdb95d2a361ab0d (diff) | |
Merge branch 'linus' into perf/urgent
Merge reason: we need to fix a non-trivial merge conflict.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/cpufreq/powernow-k8.c')
| -rw-r--r-- | drivers/cpufreq/powernow-k8.c | 19 |
1 files changed, 13 insertions, 6 deletions
diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c index 8f9b2ceeec85..c0e816468e30 100644 --- a/drivers/cpufreq/powernow-k8.c +++ b/drivers/cpufreq/powernow-k8.c @@ -40,6 +40,7 @@ #include <linux/delay.h> #include <asm/msr.h> +#include <asm/cpu_device_id.h> #include <linux/acpi.h> #include <linux/mutex.h> @@ -520,6 +521,15 @@ static int core_voltage_post_transition(struct powernow_k8_data *data, return 0; } +static const struct x86_cpu_id powernow_k8_ids[] = { + /* IO based frequency switching */ + { X86_VENDOR_AMD, 0xf }, + /* MSR based frequency switching supported */ + X86_FEATURE_MATCH(X86_FEATURE_HW_PSTATE), + {} +}; +MODULE_DEVICE_TABLE(x86cpu, powernow_k8_ids); + static void check_supported_cpu(void *_rc) { u32 eax, ebx, ecx, edx; @@ -527,13 +537,7 @@ static void check_supported_cpu(void *_rc) *rc = -ENODEV; - if (__this_cpu_read(cpu_info.x86_vendor) != X86_VENDOR_AMD) - return; - eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE); - if (((eax & CPUID_XFAM) != CPUID_XFAM_K8) && - ((eax & CPUID_XFAM) < CPUID_XFAM_10H)) - return; if ((eax & CPUID_XFAM) == CPUID_XFAM_K8) { if (((eax & CPUID_USE_XFAM_XMOD) != CPUID_USE_XFAM_XMOD) || @@ -1553,6 +1557,9 @@ static int __cpuinit powernowk8_init(void) unsigned int i, supported_cpus = 0, cpu; int rv; + if (!x86_match_cpu(powernow_k8_ids)) + return -ENODEV; + for_each_online_cpu(i) { int rc; smp_call_function_single(i, check_supported_cpu, &rc, 1); |