diff options
| author | Vikas Shivappa <vikas.shivappa@linux.intel.com> | 2017-07-25 14:14:43 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-08-01 22:41:28 +0200 |
| commit | 748b6b881ccdda8f0663c68605f431279e06f49a (patch) | |
| tree | 57480342052d0f96215581be325b3d42fd6a7b83 /arch/x86/kernel | |
| parent | 4be6c078428b08d1a948cc09faca8f1326231866 (diff) | |
x86/intel_rdt/cqm: Add sched_in support
OS associates an RMID/CLOSid to a task by writing the per CPU
IA32_PQR_ASSOC MSR when a task is scheduled in.
The sched_in code will stay as no-op unless we are running on Intel SKU
which supports either resource control or monitoring and we also enable
them by mounting the resctrl fs. The per cpu CLOSid/RMID values are
cached and the write is performed only when a task with a different
CLOSid/RMID is scheduled in.
Signed-off-by: Vikas Shivappa <vikas.shivappa@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: ravi.v.shankar@intel.com
Cc: tony.luck@intel.com
Cc: fenghua.yu@intel.com
Cc: peterz@infradead.org
Cc: eranian@google.com
Cc: vikas.shivappa@intel.com
Cc: ak@linux.intel.com
Cc: davidcc@google.com
Cc: reinette.chatre@intel.com
Link: http://lkml.kernel.org/r/1501017287-28083-25-git-send-email-vikas.shivappa@linux.intel.com
Diffstat (limited to 'arch/x86/kernel')
| -rw-r--r-- | arch/x86/kernel/cpu/intel_rdt.h | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/arch/x86/kernel/cpu/intel_rdt.h b/arch/x86/kernel/cpu/intel_rdt.h index 92a5d3072d93..7fcaa5f82bd0 100644 --- a/arch/x86/kernel/cpu/intel_rdt.h +++ b/arch/x86/kernel/cpu/intel_rdt.h @@ -22,8 +22,6 @@ #define RMID_VAL_ERROR BIT_ULL(63) #define RMID_VAL_UNAVAIL BIT_ULL(62) -DECLARE_STATIC_KEY_FALSE(rdt_enable_key); - /** * struct mon_evt - Entry in the event list of a resource * @evtid: event id @@ -61,8 +59,6 @@ extern bool rdt_alloc_capable; extern bool rdt_mon_capable; extern unsigned int rdt_mon_features; -DECLARE_STATIC_KEY_FALSE(rdt_mon_enable_key); - enum rdt_group_type { RDTCTRL_GROUP = 0, RDTMON_GROUP, |