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powerpc/pseries/mm: Improve error reporting on HCALL failures

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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.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
[mpe: Split out of larger patch]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Aneesh Kumar K.V
2018-06-29 14:09:04 +05:30
committed by Michael Ellerman
parent 65471d763e
commit ca42d8d2d6
1 changed files with 10 additions and 6 deletions
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16
arch/powerpc/platforms/pseries/lpar.c
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@@ -166,8 +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); lpar_rc = plpar_pte_enter(flags, hpte_group, hpte_v, hpte_r, &slot);
if (unlikely(lpar_rc == H_PTEG_FULL)) { if (unlikely(lpar_rc == H_PTEG_FULL)) {
if (!(vflags & HPTE_V_BOLTED)) pr_devel("Hash table group is full\n");
pr_devel(" full\n");
return -1; return -1;
} }
@@ -177,8 +176,7 @@ static long pSeries_lpar_hpte_insert(unsigned long hpte_group,
* or we will loop forever, so return -2 in this case. * or we will loop forever, so return -2 in this case.
*/ */
if (unlikely(lpar_rc != H_SUCCESS)) { if (unlikely(lpar_rc != H_SUCCESS)) {
if (!(vflags & HPTE_V_BOLTED)) pr_err("Failed hash pte insert with error %ld\n", lpar_rc);
pr_devel(" lpar err %ld\n", lpar_rc);
return -2; return -2;
} }
if (!(vflags & HPTE_V_BOLTED)) if (!(vflags & HPTE_V_BOLTED))
@@ -241,8 +239,11 @@ static void manual_hpte_clear_all(void)
*/ */
for (i = 0; i < hpte_count; i += 4) { for (i = 0; i < hpte_count; i += 4) {
lpar_rc = plpar_pte_read_4_raw(0, i, (void *)ptes); 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; continue;
}
for (j = 0; j < 4; j++){ for (j = 0; j < 4; j++){
if ((ptes[j].pteh & HPTE_V_VRMA_MASK) == if ((ptes[j].pteh & HPTE_V_VRMA_MASK) ==
HPTE_V_VRMA_MASK) HPTE_V_VRMA_MASK)
@@ -341,8 +342,11 @@ 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) { for (i = 0; i < HPTES_PER_GROUP; i += 4, hpte_group += 4) {
lpar_rc = plpar_pte_read_4(0, hpte_group, (void *)ptes); 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; continue;
}
for (j = 0; j < 4; j++) { for (j = 0; j < 4; j++) {
if (HPTE_V_COMPARE(ptes[j].pteh, want_v) && if (HPTE_V_COMPARE(ptes[j].pteh, want_v) &&