We will use this in later patch.
Signed-off-by: Aneesh Kumar K.V <[email protected]>
---
arch/powerpc/platforms/ps3/htab.c | 37 +++++++++++++++++++++++++++++++++++++
1 file changed, 37 insertions(+)
diff --git a/arch/powerpc/platforms/ps3/htab.c
b/arch/powerpc/platforms/ps3/htab.c
index cc2b281a3766..255b7a33fefe 100644
--- a/arch/powerpc/platforms/ps3/htab.c
+++ b/arch/powerpc/platforms/ps3/htab.c
@@ -193,6 +193,43 @@ static void ps3_hpte_clear(void)
ps3_mm_vas_destroy();
}
+static long ps3_hpte_find(unsigned long hash, unsigned long want_v)
+{
+ unsigned long i, j, result;
+ unsigned long hpte_group;
+ bool secondary_search = false;
+ u64 hpte_v_array[4], hpte_rs;
+
+
+ /* first check primary */
+ hpte_group = (hash & htab_hash_mask) * HPTES_PER_GROUP;
+
+search_again:
+ for (i = 0; i < HPTES_PER_GROUP; i += 4, hpte_group += 4) {
+
+ result = lv1_read_htab_entries(PS3_LPAR_VAS_ID_CURRENT,
+ hpte_group & ~0x3UL,
&hpte_v_array[0],
+ &hpte_v_array[1],
&hpte_v_array[2],
+ &hpte_v_array[3], &hpte_rs);
+ /* ignore failures ? */
+ if (result)
+ continue;
+
+ for (j = 0; j < 4; j++) {
+ if (HPTE_V_COMPARE(hpte_v_array[j], want_v) &&
+ (hpte_v_array[j] & HPTE_V_VALID)) {
+ return hpte_group + j;
+ }
+ }
+ }
+ if (!secondary_search) {
+ hpte_group = (~hash & htab_hash_mask) * HPTES_PER_GROUP;
+ secondary_search = true;
+ goto search_again;
+ }
+ return -1;
+}
+
void __init ps3_hpte_init(unsigned long htab_size)
{
mmu_hash_ops.hpte_invalidate = ps3_hpte_invalidate;
--
2.13.3
