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Diffstat (limited to 'arch/ppc64/mm/hash_native.c')
-rw-r--r--arch/ppc64/mm/hash_native.c164
1 files changed, 99 insertions, 65 deletions
diff --git a/arch/ppc64/mm/hash_native.c b/arch/ppc64/mm/hash_native.c
index 52b6b9305341..a6abd3a979bf 100644
--- a/arch/ppc64/mm/hash_native.c
+++ b/arch/ppc64/mm/hash_native.c
@@ -27,9 +27,9 @@
static DEFINE_SPINLOCK(native_tlbie_lock);
-static inline void native_lock_hpte(HPTE *hptep)
+static inline void native_lock_hpte(hpte_t *hptep)
{
- unsigned long *word = &hptep->dw0.dword0;
+ unsigned long *word = &hptep->v;
while (1) {
if (!test_and_set_bit(HPTE_LOCK_BIT, word))
@@ -39,32 +39,28 @@ static inline void native_lock_hpte(HPTE *hptep)
}
}
-static inline void native_unlock_hpte(HPTE *hptep)
+static inline void native_unlock_hpte(hpte_t *hptep)
{
- unsigned long *word = &hptep->dw0.dword0;
+ unsigned long *word = &hptep->v;
asm volatile("lwsync":::"memory");
clear_bit(HPTE_LOCK_BIT, word);
}
long native_hpte_insert(unsigned long hpte_group, unsigned long va,
- unsigned long prpn, int secondary,
- unsigned long hpteflags, int bolted, int large)
+ unsigned long prpn, unsigned long vflags,
+ unsigned long rflags)
{
unsigned long arpn = physRpn_to_absRpn(prpn);
- HPTE *hptep = htab_address + hpte_group;
- Hpte_dword0 dw0;
- HPTE lhpte;
+ hpte_t *hptep = htab_address + hpte_group;
+ unsigned long hpte_v, hpte_r;
int i;
for (i = 0; i < HPTES_PER_GROUP; i++) {
- dw0 = hptep->dw0.dw0;
-
- if (!dw0.v) {
+ if (! (hptep->v & HPTE_V_VALID)) {
/* retry with lock held */
native_lock_hpte(hptep);
- dw0 = hptep->dw0.dw0;
- if (!dw0.v)
+ if (! (hptep->v & HPTE_V_VALID))
break;
native_unlock_hpte(hptep);
}
@@ -75,56 +71,45 @@ long native_hpte_insert(unsigned long hpte_group, unsigned long va,
if (i == HPTES_PER_GROUP)
return -1;
- lhpte.dw1.dword1 = 0;
- lhpte.dw1.dw1.rpn = arpn;
- lhpte.dw1.flags.flags = hpteflags;
-
- lhpte.dw0.dword0 = 0;
- lhpte.dw0.dw0.avpn = va >> 23;
- lhpte.dw0.dw0.h = secondary;
- lhpte.dw0.dw0.bolted = bolted;
- lhpte.dw0.dw0.v = 1;
-
- if (large) {
- lhpte.dw0.dw0.l = 1;
- lhpte.dw0.dw0.avpn &= ~0x1UL;
- }
-
- hptep->dw1.dword1 = lhpte.dw1.dword1;
+ hpte_v = (va >> 23) << HPTE_V_AVPN_SHIFT | vflags | HPTE_V_VALID;
+ if (vflags & HPTE_V_LARGE)
+ va &= ~(1UL << HPTE_V_AVPN_SHIFT);
+ hpte_r = (arpn << HPTE_R_RPN_SHIFT) | rflags;
+ hptep->r = hpte_r;
/* Guarantee the second dword is visible before the valid bit */
__asm__ __volatile__ ("eieio" : : : "memory");
-
/*
* Now set the first dword including the valid bit
* NOTE: this also unlocks the hpte
*/
- hptep->dw0.dword0 = lhpte.dw0.dword0;
+ hptep->v = hpte_v;
__asm__ __volatile__ ("ptesync" : : : "memory");
- return i | (secondary << 3);
+ return i | (!!(vflags & HPTE_V_SECONDARY) << 3);
}
static long native_hpte_remove(unsigned long hpte_group)
{
- HPTE *hptep;
- Hpte_dword0 dw0;
+ hpte_t *hptep;
int i;
int slot_offset;
+ unsigned long hpte_v;
/* pick a random entry to start at */
slot_offset = mftb() & 0x7;
for (i = 0; i < HPTES_PER_GROUP; i++) {
hptep = htab_address + hpte_group + slot_offset;
- dw0 = hptep->dw0.dw0;
+ hpte_v = hptep->v;
- if (dw0.v && !dw0.bolted) {
+ if ((hpte_v & HPTE_V_VALID) && !(hpte_v & HPTE_V_BOLTED)) {
/* retry with lock held */
native_lock_hpte(hptep);
- dw0 = hptep->dw0.dw0;
- if (dw0.v && !dw0.bolted)
+ hpte_v = hptep->v;
+ if ((hpte_v & HPTE_V_VALID)
+ && !(hpte_v & HPTE_V_BOLTED))
break;
native_unlock_hpte(hptep);
}
@@ -137,15 +122,15 @@ static long native_hpte_remove(unsigned long hpte_group)
return -1;
/* Invalidate the hpte. NOTE: this also unlocks it */
- hptep->dw0.dword0 = 0;
+ hptep->v = 0;
return i;
}
-static inline void set_pp_bit(unsigned long pp, HPTE *addr)
+static inline void set_pp_bit(unsigned long pp, hpte_t *addr)
{
unsigned long old;
- unsigned long *p = &addr->dw1.dword1;
+ unsigned long *p = &addr->r;
__asm__ __volatile__(
"1: ldarx %0,0,%3\n\
@@ -163,11 +148,11 @@ static inline void set_pp_bit(unsigned long pp, HPTE *addr)
*/
static long native_hpte_find(unsigned long vpn)
{
- HPTE *hptep;
+ hpte_t *hptep;
unsigned long hash;
unsigned long i, j;
long slot;
- Hpte_dword0 dw0;
+ unsigned long hpte_v;
hash = hpt_hash(vpn, 0);
@@ -175,10 +160,11 @@ static long native_hpte_find(unsigned long vpn)
slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
for (i = 0; i < HPTES_PER_GROUP; i++) {
hptep = htab_address + slot;
- dw0 = hptep->dw0.dw0;
+ hpte_v = hptep->v;
- if ((dw0.avpn == (vpn >> 11)) && dw0.v &&
- (dw0.h == j)) {
+ if ((HPTE_V_AVPN_VAL(hpte_v) == (vpn >> 11))
+ && (hpte_v & HPTE_V_VALID)
+ && ( !!(hpte_v & HPTE_V_SECONDARY) == j)) {
/* HPTE matches */
if (j)
slot = -slot;
@@ -195,20 +181,21 @@ static long native_hpte_find(unsigned long vpn)
static long native_hpte_updatepp(unsigned long slot, unsigned long newpp,
unsigned long va, int large, int local)
{
- HPTE *hptep = htab_address + slot;
- Hpte_dword0 dw0;
+ hpte_t *hptep = htab_address + slot;
+ unsigned long hpte_v;
unsigned long avpn = va >> 23;
int ret = 0;
if (large)
- avpn &= ~0x1UL;
+ avpn &= ~1;
native_lock_hpte(hptep);
- dw0 = hptep->dw0.dw0;
+ hpte_v = hptep->v;
/* Even if we miss, we need to invalidate the TLB */
- if ((dw0.avpn != avpn) || !dw0.v) {
+ if ((HPTE_V_AVPN_VAL(hpte_v) != avpn)
+ || !(hpte_v & HPTE_V_VALID)) {
native_unlock_hpte(hptep);
ret = -1;
} else {
@@ -244,7 +231,7 @@ static void native_hpte_updateboltedpp(unsigned long newpp, unsigned long ea)
{
unsigned long vsid, va, vpn, flags = 0;
long slot;
- HPTE *hptep;
+ hpte_t *hptep;
int lock_tlbie = !cpu_has_feature(CPU_FTR_LOCKLESS_TLBIE);
vsid = get_kernel_vsid(ea);
@@ -269,26 +256,27 @@ static void native_hpte_updateboltedpp(unsigned long newpp, unsigned long ea)
static void native_hpte_invalidate(unsigned long slot, unsigned long va,
int large, int local)
{
- HPTE *hptep = htab_address + slot;
- Hpte_dword0 dw0;
+ hpte_t *hptep = htab_address + slot;
+ unsigned long hpte_v;
unsigned long avpn = va >> 23;
unsigned long flags;
int lock_tlbie = !cpu_has_feature(CPU_FTR_LOCKLESS_TLBIE);
if (large)
- avpn &= ~0x1UL;
+ avpn &= ~1;
local_irq_save(flags);
native_lock_hpte(hptep);
- dw0 = hptep->dw0.dw0;
+ hpte_v = hptep->v;
/* Even if we miss, we need to invalidate the TLB */
- if ((dw0.avpn != avpn) || !dw0.v) {
+ if ((HPTE_V_AVPN_VAL(hpte_v) != avpn)
+ || !(hpte_v & HPTE_V_VALID)) {
native_unlock_hpte(hptep);
} else {
/* Invalidate the hpte. NOTE: this also unlocks it */
- hptep->dw0.dword0 = 0;
+ hptep->v = 0;
}
/* Invalidate the tlb */
@@ -304,13 +292,57 @@ static void native_hpte_invalidate(unsigned long slot, unsigned long va,
local_irq_restore(flags);
}
+/*
+ * clear all mappings on kexec. All cpus are in real mode (or they will
+ * be when they isi), and we are the only one left. We rely on our kernel
+ * mapping being 0xC0's and the hardware ignoring those two real bits.
+ *
+ * TODO: add batching support when enabled. remember, no dynamic memory here,
+ * athough there is the control page available...
+ */
+static void native_hpte_clear(void)
+{
+ unsigned long slot, slots, flags;
+ hpte_t *hptep = htab_address;
+ unsigned long hpte_v;
+ unsigned long pteg_count;
+
+ pteg_count = htab_hash_mask + 1;
+
+ local_irq_save(flags);
+
+ /* we take the tlbie lock and hold it. Some hardware will
+ * deadlock if we try to tlbie from two processors at once.
+ */
+ spin_lock(&native_tlbie_lock);
+
+ slots = pteg_count * HPTES_PER_GROUP;
+
+ for (slot = 0; slot < slots; slot++, hptep++) {
+ /*
+ * we could lock the pte here, but we are the only cpu
+ * running, right? and for crash dump, we probably
+ * don't want to wait for a maybe bad cpu.
+ */
+ hpte_v = hptep->v;
+
+ if (hpte_v & HPTE_V_VALID) {
+ hptep->v = 0;
+ tlbie(slot2va(hpte_v, slot), hpte_v & HPTE_V_LARGE);
+ }
+ }
+
+ spin_unlock(&native_tlbie_lock);
+ local_irq_restore(flags);
+}
+
static void native_flush_hash_range(unsigned long context,
unsigned long number, int local)
{
unsigned long vsid, vpn, va, hash, secondary, slot, flags, avpn;
int i, j;
- HPTE *hptep;
- Hpte_dword0 dw0;
+ hpte_t *hptep;
+ unsigned long hpte_v;
struct ppc64_tlb_batch *batch = &__get_cpu_var(ppc64_tlb_batch);
/* XXX fix for large ptes */
@@ -346,14 +378,15 @@ static void native_flush_hash_range(unsigned long context,
native_lock_hpte(hptep);
- dw0 = hptep->dw0.dw0;
+ hpte_v = hptep->v;
/* Even if we miss, we need to invalidate the TLB */
- if ((dw0.avpn != avpn) || !dw0.v) {
+ if ((HPTE_V_AVPN_VAL(hpte_v) != avpn)
+ || !(hpte_v & HPTE_V_VALID)) {
native_unlock_hpte(hptep);
} else {
/* Invalidate the hpte. NOTE: this also unlocks it */
- hptep->dw0.dword0 = 0;
+ hptep->v = 0;
}
j++;
@@ -415,7 +448,8 @@ void hpte_init_native(void)
ppc_md.hpte_updatepp = native_hpte_updatepp;
ppc_md.hpte_updateboltedpp = native_hpte_updateboltedpp;
ppc_md.hpte_insert = native_hpte_insert;
- ppc_md.hpte_remove = native_hpte_remove;
+ ppc_md.hpte_remove = native_hpte_remove;
+ ppc_md.hpte_clear_all = native_hpte_clear;
if (tlb_batching_enabled())
ppc_md.flush_hash_range = native_flush_hash_range;
htab_finish_init();
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 07:59:36 +0100