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path: root/drivers/acpi/processor_perflib.c
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Diffstat (limited to 'drivers/acpi/processor_perflib.c')
-rw-r--r--drivers/acpi/processor_perflib.c30
1 files changed, 21 insertions, 9 deletions
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index 80c251e..dc98f7a 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -38,6 +38,7 @@
#include <asm/uaccess.h>
#endif
+#include <asm/cpufeature.h>
#include <acpi/acpi_bus.h>
#include <acpi/processor.h>
@@ -126,7 +127,7 @@ static struct notifier_block acpi_ppc_notifier_block = {
static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
{
acpi_status status = 0;
- unsigned long ppc = 0;
+ unsigned long long ppc = 0;
if (!pr)
@@ -334,7 +335,6 @@ static int acpi_processor_get_performance_info(struct acpi_processor *pr)
acpi_status status = AE_OK;
acpi_handle handle = NULL;
-
if (!pr || !pr->performance || !pr->handle)
return -EINVAL;
@@ -347,13 +347,25 @@ static int acpi_processor_get_performance_info(struct acpi_processor *pr)
result = acpi_processor_get_performance_control(pr);
if (result)
- return result;
+ goto update_bios;
result = acpi_processor_get_performance_states(pr);
if (result)
- return result;
+ goto update_bios;
return 0;
+
+ /*
+ * Having _PPC but missing frequencies (_PSS, _PCT) is a very good hint that
+ * the BIOS is older than the CPU and does not know its frequencies
+ */
+ update_bios:
+ if (ACPI_SUCCESS(acpi_get_handle(pr->handle, "_PPC", &handle))){
+ if(boot_cpu_has(X86_FEATURE_EST))
+ printk(KERN_WARNING FW_BUG "BIOS needs update for CPU "
+ "frequency support\n");
+ }
+ return result;
}
int acpi_processor_notify_smm(struct module *calling_module)
@@ -524,13 +536,13 @@ static int acpi_processor_get_psd(struct acpi_processor *pr)
psd = buffer.pointer;
if (!psd || (psd->type != ACPI_TYPE_PACKAGE)) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n"));
+ printk(KERN_ERR PREFIX "Invalid _PSD data\n");
result = -EFAULT;
goto end;
}
if (psd->package.count != 1) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n"));
+ printk(KERN_ERR PREFIX "Invalid _PSD data\n");
result = -EFAULT;
goto end;
}
@@ -543,19 +555,19 @@ static int acpi_processor_get_psd(struct acpi_processor *pr)
status = acpi_extract_package(&(psd->package.elements[0]),
&format, &state);
if (ACPI_FAILURE(status)) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n"));
+ printk(KERN_ERR PREFIX "Invalid _PSD data\n");
result = -EFAULT;
goto end;
}
if (pdomain->num_entries != ACPI_PSD_REV0_ENTRIES) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown _PSD:num_entries\n"));
+ printk(KERN_ERR PREFIX "Unknown _PSD:num_entries\n");
result = -EFAULT;
goto end;
}
if (pdomain->revision != ACPI_PSD_REV0_REVISION) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown _PSD:revision\n"));
+ printk(KERN_ERR PREFIX "Unknown _PSD:revision\n");
result = -EFAULT;
goto end;
}