static long beat_lpar_hpte_find(unsigned long va, int psize)
{
unsigned long hash;
unsigned long i, j;
long slot;
unsigned long want_v, hpte_v;
hash = hpt_hash(va, mmu_psize_defs[psize].shift, MMU_SEGSIZE_256M);
want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
for (j = 0; j < 2; j++) {
slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
for (i = 0; i < HPTES_PER_GROUP; i++) {
hpte_v = beat_lpar_hpte_getword0(slot);
if (HPTE_V_COMPARE(hpte_v, want_v)
&& (hpte_v & HPTE_V_VALID)
&& (!!(hpte_v & HPTE_V_SECONDARY) == j)) {
/* HPTE matches */
if (j)
slot = -slot;
return slot;
}
++slot;
}
hash = ~hash;
}
return -1;
}
static void beat_lpar_hpte_invalidate(unsigned long slot, unsigned long va,
int psize, int ssize, int local)
{
unsigned long want_v;
unsigned long lpar_rc;
u64 dummy1, dummy2;
unsigned long flags;
DBG_LOW(" inval : slot=%lx, va=%016lx, psize: %d, local: %d\n",
slot, va, psize, local);
want_v = hpte_encode_v(va, psize, MMU_SEGSIZE_256M);
atomic_spin_lock_irqsave(&beat_htab_lock, flags);
dummy1 = beat_lpar_hpte_getword0(slot);
if ((dummy1 & ~0x7FUL) != (want_v & ~0x7FUL)) {
DBG_LOW("not found !\n");
atomic_spin_unlock_irqrestore(&beat_htab_lock, flags);
return;
}
lpar_rc = beat_write_htab_entry(0, slot, 0, 0, HPTE_V_VALID, 0,
&dummy1, &dummy2);
atomic_spin_unlock_irqrestore(&beat_htab_lock, flags);
BUG_ON(lpar_rc != 0);
}
/*
* NOTE: for updatepp ops we are fortunate that the linux "newpp" bits and
* the low 3 bits of flags happen to line up. So no transform is needed.
* We can probably optimize here and assume the high bits of newpp are
* already zero. For now I am paranoid.
*/
static long beat_lpar_hpte_updatepp(unsigned long slot,
unsigned long newpp,
unsigned long vpn,
int psize, int apsize,
int ssize, unsigned long flags)
{
unsigned long lpar_rc;
u64 dummy0, dummy1;
unsigned long want_v;
want_v = hpte_encode_avpn(vpn, psize, MMU_SEGSIZE_256M);
DBG_LOW(" update: "
"avpnv=%016lx, slot=%016lx, psize: %d, newpp %016lx ... ",
want_v & HPTE_V_AVPN, slot, psize, newpp);
raw_spin_lock(&beat_htab_lock);
dummy0 = beat_lpar_hpte_getword0(slot);
if ((dummy0 & ~0x7FUL) != (want_v & ~0x7FUL)) {
DBG_LOW("not found !\n");
raw_spin_unlock(&beat_htab_lock);
return -1;
}
lpar_rc = beat_write_htab_entry(0, slot, 0, newpp, 0, 7, &dummy0,
&dummy1);
raw_spin_unlock(&beat_htab_lock);
if (lpar_rc != 0 || dummy0 == 0) {
DBG_LOW("not found !\n");
return -1;
}
DBG_LOW("ok %lx %lx\n", dummy0, dummy1);
BUG_ON(lpar_rc != 0);
return 0;
}