This patch adds error reporting to H_ENTER and H_READ hcalls. A failure for
both these hcalls are mostly fatal and it would be good to log the failure
reason.
We also switch printk to pr_*
Signed-off-by: Aneesh Kumar K.V <aneesh.ku...@linux.ibm.com>
---
arch/powerpc/platforms/pseries/lpar.c | 56 ++++++++++++++-------------
1 file changed, 29 insertions(+), 27 deletions(-)
diff --git a/arch/powerpc/platforms/pseries/lpar.c
b/arch/powerpc/platforms/pseries/lpar.c
index 5a392e40f3d2..a3b2a1eb8bfd 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -21,6 +21,7 @@
/* Enables debugging of low-level hash table routines - careful! */
#undef DEBUG
+#define pr_fmt(fmt) "lpar: " fmt
#include <linux/kernel.h>
#include <linux/dma-mapping.h>
@@ -165,8 +166,7 @@ static long pSeries_lpar_hpte_insert(unsigned long
hpte_group,
lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot);
if (unlikely(lpar_rc == H_PTEG_FULL)) {
- if (!(vflags & HPTE_V_BOLTED))
- pr_devel(" full\n");
+ pr_devel("Hash table group is full\n");
return -1;
}
@@ -176,14 +176,17 @@ static long pSeries_lpar_hpte_insert(unsigned long
hpte_group,
* or we will loop forever, so return -2 in this case.
*/
if (unlikely(lpar_rc != H_SUCCESS)) {
- if (!(vflags & HPTE_V_BOLTED))
- pr_devel(" lpar err %ld\n", lpar_rc);
+ pr_err("Failed hash pte insert with error %ld\n", lpar_rc);
return -2;
}
+ /*
+ * Avoid all the boot debug prints.
+ */
if (!(vflags & HPTE_V_BOLTED))
pr_devel(" -> slot: %lu\n", slot & 7);
- /* Because of iSeries, we have to pass down the secondary
+ /*
+ * Because of iSeries, we have to pass down the secondary
* bucket bit here as well
*/
return (slot & 7) | (!!(vflags & HPTE_V_SECONDARY) << 3);
@@ -240,8 +243,11 @@ static void manual_hpte_clear_all(void)
*/
for (i = 0; i < hpte_count; i += 4) {
lpar_rc = plpar_pte_read_4_raw(0, i, (void *)ptes);
- if (lpar_rc != H_SUCCESS)
+ if (lpar_rc != H_SUCCESS) {
+ pr_info("Failed to read hash page table at %ld err
%ld\n",
+ i, lpar_rc);
continue;
+ }
for (j = 0; j < 4; j++){
if ((ptes[j].pteh & HPTE_V_VRMA_MASK) ==
HPTE_V_VRMA_MASK)
@@ -340,8 +346,11 @@ static long __pSeries_lpar_hpte_find(unsigned long want_v,
unsigned long hpte_gr
for (i = 0; i < HPTES_PER_GROUP; i += 4, hpte_group += 4) {
lpar_rc = plpar_pte_read_4(0, hpte_group, (void *)ptes);
- if (lpar_rc != H_SUCCESS)
+ if (lpar_rc != H_SUCCESS) {
+ pr_info("Failed to read hash page table at %ld err
%ld\n",
+ hpte_group, lpar_rc);
continue;
+ }
for (j = 0; j < 4; j++) {
if (HPTE_V_COMPARE(ptes[j].pteh, want_v) &&
@@ -612,8 +621,8 @@ static int __init disable_bulk_remove(char *str)
{
if (strcmp(str, "off") == 0 &&
firmware_has_feature(FW_FEATURE_BULK_REMOVE)) {
- printk(KERN_INFO "Disabling BULK_REMOVE firmware
feature");
- powerpc_firmware_features &= ~FW_FEATURE_BULK_REMOVE;
+ pr_info("Disabling BULK_REMOVE firmware feature");
+ powerpc_firmware_features &= ~FW_FEATURE_BULK_REMOVE;
}
return 1;
}
@@ -659,8 +668,7 @@ static int pseries_lpar_resize_hpt(unsigned long shift)
if (!firmware_has_feature(FW_FEATURE_HPT_RESIZE))
return -ENODEV;
- printk(KERN_INFO "lpar: Attempting to resize HPT to shift %lu\n",
- shift);
+ pr_info("Attempting to resize HPT to shift %lu\n", shift);
t0 = ktime_get();
@@ -672,8 +680,7 @@ static int pseries_lpar_resize_hpt(unsigned long shift)
/* prepare with shift==0 cancels an in-progress resize
*/
rc = plpar_resize_hpt_prepare(0, 0);
if (rc != H_SUCCESS)
- printk(KERN_WARNING
- "lpar: Unexpected error %d cancelling
timed out HPT resize\n",
+ pr_warn("Unexpected error %d cancelling timed
out HPT resize\n",
rc);
return -ETIMEDOUT;
}
@@ -691,9 +698,7 @@ static int pseries_lpar_resize_hpt(unsigned long shift)
case H_RESOURCE:
return -EPERM;
default:
- printk(KERN_WARNING
- "lpar: Unexpected error %d from H_RESIZE_HPT_PREPARE\n",
- rc);
+ pr_warn("Unexpected error %d from H_RESIZE_HPT_PREPARE\n", rc);
return -EIO;
}
@@ -706,22 +711,19 @@ static int pseries_lpar_resize_hpt(unsigned long shift)
if (rc != 0) {
switch (state.commit_rc) {
case H_PTEG_FULL:
- printk(KERN_WARNING
- "lpar: Hash collision while resizing HPT\n");
+ pr_warn("Hash collision while resizing HPT\n");
return -ENOSPC;
default:
- printk(KERN_WARNING
- "lpar: Unexpected error %d from
H_RESIZE_HPT_COMMIT\n",
- state.commit_rc);
+ pr_warn("Unexpected error %d from
H_RESIZE_HPT_COMMIT\n",
+ state.commit_rc);
return -EIO;
};
}
- printk(KERN_INFO
- "lpar: HPT resize to shift %lu complete (%lld ms / %lld ms)\n",
- shift, (long long) ktime_ms_delta(t1, t0),
- (long long) ktime_ms_delta(t2, t1));
+ pr_info("HPT resize to shift %lu complete (%lld ms / %lld ms)\n",
+ shift, (long long) ktime_ms_delta(t1, t0),
+ (long long) ktime_ms_delta(t2, t1));
return 0;
}
@@ -785,13 +787,13 @@ static int __init cmo_free_hint(char *str)
parm = strstrip(str);
if (strcasecmp(parm, "no") == 0 || strcasecmp(parm, "off") == 0) {
- printk(KERN_INFO "cmo_free_hint: CMO free page hinting is not
active.\n");
+ pr_info("%s: CMO free page hinting is not active.\n", __func__);
cmo_free_hint_flag = 0;
return 1;
}
cmo_free_hint_flag = 1;
- printk(KERN_INFO "cmo_free_hint: CMO free page hinting is active.\n");
+ pr_info("%s: CMO free page hinting is active.\n", __func__);
if (strcasecmp(parm, "yes") == 0 || strcasecmp(parm, "on") == 0)
return 1;
--
2.17.1
