Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1439740
| From | Jan Kiszka <jan.kiszka@siemens.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH] intel_pstate: Fix MSR_CONFIG_TDP_x addressing in core_get_max_pstate |
| Date | 2016-07-08 20:50 +0200 |
| Message-ID | <rSJ0B-5b-3@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
If MSR_CONFIG_TDP_CONTROL is locked, we currently try to address some MSR 0x80000648 or so. Mask out the relevant level bits 0 and 1. Found while running over the Jailhouse hypervisor which became upset about this strange MSR index. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> --- drivers/cpufreq/intel_pstate.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c index 1fa1a32..1b15917 100644 --- a/drivers/cpufreq/intel_pstate.c +++ b/drivers/cpufreq/intel_pstate.c @@ -944,7 +944,7 @@ static int core_get_max_pstate(void) if (err) goto skip_tar; - tdp_msr = MSR_CONFIG_TDP_NOMINAL + tdp_ctrl; + tdp_msr = MSR_CONFIG_TDP_NOMINAL + (tdp_ctrl & 0x3); err = rdmsrl_safe(tdp_msr, &tdp_ratio); if (err) goto skip_tar; -- 2.1.4
Back to linux.kernel | Previous | Next — Next in thread | Find similar | Unroll thread
[PATCH] intel_pstate: Fix MSR_CONFIG_TDP_x addressing in core_get_max_pstate Jan Kiszka <jan.kiszka@siemens.com> - 2016-07-08 20:50 +0200
Re: [PATCH] intel_pstate: Fix MSR_CONFIG_TDP_x addressing in core_get_max_pstate Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2016-07-08 21:50 +0200
Re: [PATCH] intel_pstate: Fix MSR_CONFIG_TDP_x addressing in core_get_max_pstate "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-07-09 02:50 +0200
Re: [PATCH] intel_pstate: Fix MSR_CONFIG_TDP_x addressing in core_get_max_pstate Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> - 2016-07-10 05:50 +0200
csiph-web