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authorKan Liang <kan.liang@linux.intel.com>2019-04-30 17:53:47 -0700
committerIngo Molnar <mingo@kernel.org>2019-06-17 12:36:21 +0200
commit07ce734dd8adc0f170d43c15a9b91b707a21b9d7 (patch)
tree7d05ad95398ef3921ebf37391a002c1ef61f4e14
parent3da04b8a00dd6d39970b9e764b78c5dfb40ec013 (diff)
perf/x86/intel/uncore: Clean up client IMC
The client IMC block is accessed by MMIO. Current code uses an informal way to access the block, which is not recommended. Clean up the code by using __iomem annotation and the accessor functions (read[lq]()). Move exit_box() and read_counter() to generic code, which can be shared with the server code later. Signed-off-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: acme@kernel.org Cc: eranian@google.com Link: https://lkml.kernel.org/r/1556672028-119221-6-git-send-email-kan.liang@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
-rw-r--r--arch/x86/events/intel/uncore.c15
-rw-r--r--arch/x86/events/intel/uncore.h6
-rw-r--r--arch/x86/events/intel/uncore_snb.c16
3 files changed, 22 insertions, 15 deletions
diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c
index 442f30e5e49a..8bb537143d86 100644
--- a/arch/x86/events/intel/uncore.c
+++ b/arch/x86/events/intel/uncore.c
@@ -120,6 +120,21 @@ u64 uncore_msr_read_counter(struct intel_uncore_box *box, struct perf_event *eve
return count;
}
+void uncore_mmio_exit_box(struct intel_uncore_box *box)
+{
+ if (box->io_addr)
+ iounmap(box->io_addr);
+}
+
+u64 uncore_mmio_read_counter(struct intel_uncore_box *box,
+ struct perf_event *event)
+{
+ if (!box->io_addr)
+ return 0;
+
+ return readq(box->io_addr + event->hw.event_base);
+}
+
/*
* generic get constraint function for shared match/mask registers.
*/
diff --git a/arch/x86/events/intel/uncore.h b/arch/x86/events/intel/uncore.h
index fc5f48816005..cdd9691365a1 100644
--- a/arch/x86/events/intel/uncore.h
+++ b/arch/x86/events/intel/uncore.h
@@ -2,6 +2,7 @@
#include <linux/slab.h>
#include <linux/pci.h>
#include <asm/apicdef.h>
+#include <linux/io-64-nonatomic-lo-hi.h>
#include <linux/perf_event.h>
#include "../perf_event.h"
@@ -128,7 +129,7 @@ struct intel_uncore_box {
struct hrtimer hrtimer;
struct list_head list;
struct list_head active_list;
- void *io_addr;
+ void __iomem *io_addr;
struct intel_uncore_extra_reg shared_regs[0];
};
@@ -502,6 +503,9 @@ static inline struct intel_uncore_box *uncore_event_to_box(struct perf_event *ev
struct intel_uncore_box *uncore_pmu_to_box(struct intel_uncore_pmu *pmu, int cpu);
u64 uncore_msr_read_counter(struct intel_uncore_box *box, struct perf_event *event);
+void uncore_mmio_exit_box(struct intel_uncore_box *box);
+u64 uncore_mmio_read_counter(struct intel_uncore_box *box,
+ struct perf_event *event);
void uncore_pmu_start_hrtimer(struct intel_uncore_box *box);
void uncore_pmu_cancel_hrtimer(struct intel_uncore_box *box);
void uncore_pmu_event_start(struct perf_event *event, int flags);
diff --git a/arch/x86/events/intel/uncore_snb.c b/arch/x86/events/intel/uncore_snb.c
index b0ca4f88c6f2..dbaa1b088a30 100644
--- a/arch/x86/events/intel/uncore_snb.c
+++ b/arch/x86/events/intel/uncore_snb.c
@@ -428,11 +428,6 @@ static void snb_uncore_imc_init_box(struct intel_uncore_box *box)
box->hrtimer_duration = UNCORE_SNB_IMC_HRTIMER_INTERVAL;
}
-static void snb_uncore_imc_exit_box(struct intel_uncore_box *box)
-{
- iounmap(box->io_addr);
-}
-
static void snb_uncore_imc_enable_box(struct intel_uncore_box *box)
{}
@@ -445,13 +440,6 @@ static void snb_uncore_imc_enable_event(struct intel_uncore_box *box, struct per
static void snb_uncore_imc_disable_event(struct intel_uncore_box *box, struct perf_event *event)
{}
-static u64 snb_uncore_imc_read_counter(struct intel_uncore_box *box, struct perf_event *event)
-{
- struct hw_perf_event *hwc = &event->hw;
-
- return (u64)*(unsigned int *)(box->io_addr + hwc->event_base);
-}
-
/*
* Keep the custom event_init() function compatible with old event
* encoding for free running counters.
@@ -578,13 +566,13 @@ static struct pmu snb_uncore_imc_pmu = {
static struct intel_uncore_ops snb_uncore_imc_ops = {
.init_box = snb_uncore_imc_init_box,
- .exit_box = snb_uncore_imc_exit_box,
+ .exit_box = uncore_mmio_exit_box,
.enable_box = snb_uncore_imc_enable_box,
.disable_box = snb_uncore_imc_disable_box,
.disable_event = snb_uncore_imc_disable_event,
.enable_event = snb_uncore_imc_enable_event,
.hw_config = snb_uncore_imc_hw_config,
- .read_counter = snb_uncore_imc_read_counter,
+ .read_counter = uncore_mmio_read_counter,
};
static struct intel_uncore_type snb_uncore_imc = {