diff options
| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-06-10 05:30:17 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-06-10 05:30:17 -0300 |
| commit | d635711daa98be86d4c7fd01499c34f566b54ccb (patch) | |
| tree | aa5cc3760a27c3d57146498cb82fa549547de06c /arch/arm/kernel/perf_event_v7.c | |
| parent | c91265cd0efb83778f015b4d4b1129bd2cfd075e (diff) | |
Linux-libre 4.6.2-gnu
Diffstat (limited to 'arch/arm/kernel/perf_event_v7.c')
| -rw-r--r-- | arch/arm/kernel/perf_event_v7.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/arch/arm/kernel/perf_event_v7.c b/arch/arm/kernel/perf_event_v7.c index 4152158f6..15063851c 100644 --- a/arch/arm/kernel/perf_event_v7.c +++ b/arch/arm/kernel/perf_event_v7.c @@ -712,6 +712,11 @@ static const struct attribute_group *armv7_pmuv2_attr_groups[] = { #define ARMV7_EXCLUDE_USER (1 << 30) #define ARMV7_INCLUDE_HYP (1 << 27) +/* + * Secure debug enable reg + */ +#define ARMV7_SDER_SUNIDEN BIT(1) /* Permit non-invasive debug */ + static inline u32 armv7_pmnc_read(void) { u32 val; @@ -1094,7 +1099,13 @@ static int armv7pmu_set_event_filter(struct hw_perf_event *event, static void armv7pmu_reset(void *info) { struct arm_pmu *cpu_pmu = (struct arm_pmu *)info; - u32 idx, nb_cnt = cpu_pmu->num_events; + u32 idx, nb_cnt = cpu_pmu->num_events, val; + + if (cpu_pmu->secure_access) { + asm volatile("mrc p15, 0, %0, c1, c1, 1" : "=r" (val)); + val |= ARMV7_SDER_SUNIDEN; + asm volatile("mcr p15, 0, %0, c1, c1, 1" : : "r" (val)); + } /* The counter and interrupt enable registers are unknown at reset. */ for (idx = ARMV7_IDX_CYCLE_COUNTER; idx < nb_cnt; ++idx) { |