Commit b928466b authored by Pawel Moll's avatar Pawel Moll

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: default avatarPawel Moll <pawel.moll@arm.com>
parent b7c1beb2
...@@ -1003,7 +1003,7 @@ static void arm_ccn_pmu_xp_watchpoint_config(struct perf_event *event) ...@@ -1003,7 +1003,7 @@ static void arm_ccn_pmu_xp_watchpoint_config(struct perf_event *event)
/* Comparison values */ /* Comparison values */
writel(cmp_l & 0xffffffff, source->base + CCN_XP_DT_CMP_VAL_L(wp)); 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); 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 & 0xffffffff, source->base + CCN_XP_DT_CMP_VAL_H(wp));
writel((cmp_h >> 32) & 0x0fffffff, writel((cmp_h >> 32) & 0x0fffffff,
...@@ -1011,7 +1011,7 @@ static void arm_ccn_pmu_xp_watchpoint_config(struct perf_event *event) ...@@ -1011,7 +1011,7 @@ static void arm_ccn_pmu_xp_watchpoint_config(struct perf_event *event)
/* Mask */ /* Mask */
writel(mask_l & 0xffffffff, source->base + CCN_XP_DT_CMP_MASK_L(wp)); 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); 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 & 0xffffffff, source->base + CCN_XP_DT_CMP_MASK_H(wp));
writel((mask_h >> 32) & 0x0fffffff, writel((mask_h >> 32) & 0x0fffffff,
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment