aboutsummaryrefslogtreecommitdiff
path: root/drivers/cpufreq/powernow-k8.c
diff options
context:
space:
mode:
authorAndreas Herrmann <andreas.herrmann3@amd.com>2012-01-06 15:56:31 +0100
committerDave Jones <davej@redhat.com>2012-01-06 10:10:53 -0500
commit201bf0f129e1715a33568d1563d9a75b840ab4d3 (patch)
tree19169945533ef7dbe0c562f43c451a08903b4fdd /drivers/cpufreq/powernow-k8.c
parentd08de0c19c3fc5b9cf557ce3b42795d036ad5da9 (diff)
downloadleg-kernel-201bf0f129e1715a33568d1563d9a75b840ab4d3.tar.gz
[CPUFREQ] powernow-k8: Avoid Pstate MSR accesses on systems supporting CPB
Due to CPB we can't directly map SW Pstates to Pstate MSRs. Get rid of the paranoia check. (assuming that the ACPI Pstate information is correct.) Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Signed-off-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'drivers/cpufreq/powernow-k8.c')
-rw-r--r--drivers/cpufreq/powernow-k8.c19
1 files changed, 10 insertions, 9 deletions
diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c
index bce576d7478e..e0329f9fa40e 100644
--- a/drivers/cpufreq/powernow-k8.c
+++ b/drivers/cpufreq/powernow-k8.c
@@ -926,23 +926,24 @@ static int fill_powernow_table_pstate(struct powernow_k8_data *data,
invalidate_entry(powernow_table, i);
continue;
}
- rdmsr(MSR_PSTATE_DEF_BASE + index, lo, hi);
- if (!(hi & HW_PSTATE_VALID_MASK)) {
- pr_debug("invalid pstate %d, ignoring\n", index);
- invalidate_entry(powernow_table, i);
- continue;
- }
-
- powernow_table[i].index = index;
-
/* Frequency may be rounded for these */
if ((boot_cpu_data.x86 == 0x10 && boot_cpu_data.x86_model < 10)
|| boot_cpu_data.x86 == 0x11) {
+
+ rdmsr(MSR_PSTATE_DEF_BASE + index, lo, hi);
+ if (!(hi & HW_PSTATE_VALID_MASK)) {
+ pr_debug("invalid pstate %d, ignoring\n", index);
+ invalidate_entry(powernow_table, i);
+ continue;
+ }
+
powernow_table[i].frequency =
freq_from_fid_did(lo & 0x3f, (lo >> 6) & 7);
} else
powernow_table[i].frequency =
data->acpi_data.states[i].core_frequency * 1000;
+
+ powernow_table[i].index = index;
}
return 0;
}