diff options
| author | Vikas Shivappa <vikas.shivappa@linux.intel.com> | 2017-07-25 14:14:47 -0700 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-08-01 22:41:29 +0200 |
| commit | e33026831bdb5f051499fec6a606f79fe1f94cc8 (patch) | |
| tree | 2a9b2e4425592ce74cb9a04cc1bdd8043d940838 /arch/x86/kernel/cpu/intel_rdt.h | |
| parent | a4de1dfdd726537e2a78b55759fc646d9b0a0be8 (diff) | |
x86/intel_rdt/mbm: Handle counter overflow
Set up a delayed work queue for each domain that will read all
the MBM counters of active RMIDs once per second to make sure
that they don't wrap around between reads from users.
[Tony: Added the initializations for the work structure and completed
the patch]
Signed-off-by: Tony Luck <tony.luck@intel.com>
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: 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/1501017287-28083-29-git-send-email-vikas.shivappa@linux.intel.com
Diffstat (limited to 'arch/x86/kernel/cpu/intel_rdt.h')
| -rw-r--r-- | arch/x86/kernel/cpu/intel_rdt.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/intel_rdt.h b/arch/x86/kernel/cpu/intel_rdt.h index f160403324d3..94e488af082e 100644 --- a/arch/x86/kernel/cpu/intel_rdt.h +++ b/arch/x86/kernel/cpu/intel_rdt.h @@ -21,10 +21,13 @@ #define QOS_L3_MBM_LOCAL_EVENT_ID 0x03 #define MBM_CNTR_WIDTH 24 +#define MBM_OVERFLOW_INTERVAL 1000 #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 @@ -183,6 +186,9 @@ struct mbm_state { * bitmap of which limbo RMIDs are above threshold * @mbm_total: saved state for MBM total bandwidth * @mbm_local: saved state for MBM local bandwidth + * @mbm_over: worker to periodically read MBM h/w counters + * @mbm_work_cpu: + * worker cpu for MBM h/w counters * @ctrl_val: array of cache or mem ctrl values (indexed by CLOSID) * @new_ctrl: new ctrl value to be loaded * @have_new_ctrl: did user provide new_ctrl for this domain @@ -194,6 +200,8 @@ struct rdt_domain { unsigned long *rmid_busy_llc; struct mbm_state *mbm_total; struct mbm_state *mbm_local; + struct delayed_work mbm_over; + int mbm_work_cpu; u32 *ctrl_val; u32 new_ctrl; bool have_new_ctrl; @@ -411,5 +419,7 @@ void mkdir_mondata_subdir_allrdtgrp(struct rdt_resource *r, struct rdt_domain *d); void mon_event_read(struct rmid_read *rr, struct rdt_domain *d, struct rdtgroup *rdtgrp, int evtid, int first); +void mbm_setup_overflow_handler(struct rdt_domain *dom); +void mbm_handle_overflow(struct work_struct *work); #endif /* _ASM_X86_INTEL_RDT_H */ |