diff options
| author | Pawel Moll <pawel.moll@arm.com> | 2016-08-10 17:06:26 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-09-24 10:07:40 +0200 |
| commit | 3c328c32e6798036243f179dca895fff7bb70253 (patch) | |
| tree | bfc94e976ffe38765d933f171284530d4365c7a3 | |
| parent | bd47c363ff8ca5e155c672849087a877ed594efb (diff) | |
bus: arm-ccn: Fix XP watchpoint settings bitmask
commit b928466b2169e061822daad48ecf55b005445547 upstream.
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.
Signed-off-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 0c22a03c9e57..0f54cb7ddcbb 100644 --- a/drivers/bus/arm-ccn.c +++ b/drivers/bus/arm-ccn.c @@ -1001,7 +1001,7 @@ 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, @@ -1009,7 +1009,7 @@ 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, |