diff options
| author | Pawel Moll <pawel.moll@arm.com> | 2016-08-10 18:06:26 +0200 |
|---|---|---|
| committer | Pawel Moll <pawel.moll@arm.com> | 2016-08-17 11:48:59 +0200 |
| commit | b928466b2169e061822daad48ecf55b005445547 (patch) | |
| tree | fcf3a8a6e624c1a440781c0ea549d4adfcf13ce9 /drivers/bus | |
| parent | bus: arm-ccn: Do not attempt to configure XPs for cycle counter (diff) | |
| download | linux-b928466b2169e061822daad48ecf55b005445547.tar.xz linux-b928466b2169e061822daad48ecf55b005445547.zip | |
bus: arm-ccn: Fix XP watchpoint settings bitmask
The code setting XP watchpoint comparator and mask registers should, in
order to be fully compliant with specification, zero one or more most
significant bits of each field. In both L cases it means zeroing bit 63.
The bitmask doing this was wrong, though, zeroing bit 60 instead.
Fortunately, due to a lucky coincidence, this turned out to be fairly
innocent with the existing hardware.
Fixed now.
Cc: stable@vger.kernel.org # 3.17+
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Diffstat (limited to 'drivers/bus')
| -rw-r--r-- | drivers/bus/arm-ccn.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/bus/arm-ccn.c b/drivers/bus/arm-ccn.c index 9bbb0ab275e4..647a27b80eff 100644 --- a/drivers/bus/arm-ccn.c +++ b/drivers/bus/arm-ccn.c @@ -1003,7 +1003,7 @@ static void arm_ccn_pmu_xp_watchpoint_config(struct perf_event *event) /* Comparison values */ writel(cmp_l & 0xffffffff, source->base + CCN_XP_DT_CMP_VAL_L(wp)); - writel((cmp_l >> 32) & 0xefffffff, + writel((cmp_l >> 32) & 0x7fffffff, source->base + CCN_XP_DT_CMP_VAL_L(wp) + 4); writel(cmp_h & 0xffffffff, source->base + CCN_XP_DT_CMP_VAL_H(wp)); writel((cmp_h >> 32) & 0x0fffffff, @@ -1011,7 +1011,7 @@ static void arm_ccn_pmu_xp_watchpoint_config(struct perf_event *event) /* Mask */ writel(mask_l & 0xffffffff, source->base + CCN_XP_DT_CMP_MASK_L(wp)); - writel((mask_l >> 32) & 0xefffffff, + writel((mask_l >> 32) & 0x7fffffff, source->base + CCN_XP_DT_CMP_MASK_L(wp) + 4); writel(mask_h & 0xffffffff, source->base + CCN_XP_DT_CMP_MASK_H(wp)); writel((mask_h >> 32) & 0x0fffffff, |