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Diffstat (limited to 'arch/powerpc/kernel/dawr.c')
-rw-r--r--arch/powerpc/kernel/dawr.c23
1 files changed, 16 insertions, 7 deletions
diff --git a/arch/powerpc/kernel/dawr.c b/arch/powerpc/kernel/dawr.c
index cc14aa6c4a1b..500f52fa4711 100644
--- a/arch/powerpc/kernel/dawr.c
+++ b/arch/powerpc/kernel/dawr.c
@@ -16,7 +16,7 @@
bool dawr_force_enable;
EXPORT_SYMBOL_GPL(dawr_force_enable);
-int set_dawr(struct arch_hw_breakpoint *brk)
+int set_dawr(int nr, struct arch_hw_breakpoint *brk)
{
unsigned long dawr, dawrx, mrd;
@@ -39,15 +39,24 @@ int set_dawr(struct arch_hw_breakpoint *brk)
if (ppc_md.set_dawr)
return ppc_md.set_dawr(dawr, dawrx);
- mtspr(SPRN_DAWR, dawr);
- mtspr(SPRN_DAWRX, dawrx);
+ if (nr == 0) {
+ mtspr(SPRN_DAWR0, dawr);
+ mtspr(SPRN_DAWRX0, dawrx);
+ } else {
+ mtspr(SPRN_DAWR1, dawr);
+ mtspr(SPRN_DAWRX1, dawrx);
+ }
return 0;
}
-static void set_dawr_cb(void *info)
+static void disable_dawrs_cb(void *info)
{
- set_dawr(info);
+ struct arch_hw_breakpoint null_brk = {0};
+ int i;
+
+ for (i = 0; i < nr_wp_slots(); i++)
+ set_dawr(i, &null_brk);
}
static ssize_t dawr_write_file_bool(struct file *file,
@@ -60,7 +69,7 @@ static ssize_t dawr_write_file_bool(struct file *file,
/* Send error to user if they hypervisor won't allow us to write DAWR */
if (!dawr_force_enable &&
firmware_has_feature(FW_FEATURE_LPAR) &&
- set_dawr(&null_brk) != H_SUCCESS)
+ set_dawr(0, &null_brk) != H_SUCCESS)
return -ENODEV;
rc = debugfs_write_file_bool(file, user_buf, count, ppos);
@@ -69,7 +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_cb, NULL, 0);
return rc;
}