[PATCH 08/15] powerpc/watchpoint: Disable all available watchpoints when !dawr_force_enable

From: Ravi Bangoria
Date: Mon Mar 09 2020 - 04:59:17 EST


Instead of disabling only first watchpoint, disable all available
watchpoints while clearing dawr_force_enable.

Signed-off-by: Ravi Bangoria <ravi.bangoria@xxxxxxxxxxxxx>
---
arch/powerpc/kernel/dawr.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/kernel/dawr.c b/arch/powerpc/kernel/dawr.c
index 311e51ee09f4..5c882f07ac7d 100644
--- a/arch/powerpc/kernel/dawr.c
+++ b/arch/powerpc/kernel/dawr.c
@@ -50,9 +50,13 @@ int set_dawr(struct arch_hw_breakpoint *brk, int nr)
return 0;
}

-static void set_dawr_cb(void *info)
+static void disable_dawrs(void *info)
{
- set_dawr(info, 0);
+ struct arch_hw_breakpoint null_brk = {0};
+ int i;
+
+ for (i = 0; i < nr_wp_slots(); i++)
+ set_dawr(&null_brk, i);
}

static ssize_t dawr_write_file_bool(struct file *file,
@@ -74,7 +78,7 @@ static ssize_t dawr_write_file_bool(struct file *file,

/* If we are clearing, make sure all CPUs have the DAWR cleared */
if (!dawr_force_enable)
- smp_call_function(set_dawr_cb, &null_brk, 0);
+ smp_call_function(disable_dawrs, NULL, 0);

return rc;
}
--
2.21.1