[mirror_ubuntu-bionic-kernel.git] / arch / powerpc / kvm / book3s_mmu_hpte.c

/*
 * Copyright (C) 2010 SUSE Linux Products GmbH. All rights reserved.
 *
 * Authors:
 *     Alexander Graf <agraf@suse.de>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

#include <linux/kvm_host.h>
#include <linux/hash.h>
#include <linux/slab.h>
#include <linux/rculist.h>

#include <asm/kvm_ppc.h>
#include <asm/kvm_book3s.h>
#include <asm/machdep.h>
#include <asm/mmu_context.h>
#include <asm/hw_irq.h>

#include "trace_pr.h"

#define PTE_SIZE	12

static struct kmem_cache *hpte_cache;

static inline u64 kvmppc_mmu_hash_pte(u64 eaddr)
{
	return hash_64(eaddr >> PTE_SIZE, HPTEG_HASH_BITS_PTE);
}

static inline u64 kvmppc_mmu_hash_pte_long(u64 eaddr)
{
	return hash_64((eaddr & 0x0ffff000) >> PTE_SIZE,
		       HPTEG_HASH_BITS_PTE_LONG);
}

static inline u64 kvmppc_mmu_hash_vpte(u64 vpage)
{
	return hash_64(vpage & 0xfffffffffULL, HPTEG_HASH_BITS_VPTE);
}

static inline u64 kvmppc_mmu_hash_vpte_long(u64 vpage)
{
	return hash_64((vpage & 0xffffff000ULL) >> 12,
		       HPTEG_HASH_BITS_VPTE_LONG);
}

#ifdef CONFIG_PPC_BOOK3S_64
static inline u64 kvmppc_mmu_hash_vpte_64k(u64 vpage)
{
	return hash_64((vpage & 0xffffffff0ULL) >> 4,
		       HPTEG_HASH_BITS_VPTE_64K);
}
#endif

void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte)
{
	u64 index;
	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);

	trace_kvm_book3s_mmu_map(pte);

	spin_lock(&vcpu3s->mmu_lock);

	/* Add to ePTE list */
	index = kvmppc_mmu_hash_pte(pte->pte.eaddr);
	hlist_add_head_rcu(&pte->list_pte, &vcpu3s->hpte_hash_pte[index]);

	/* Add to ePTE_long list */
	index = kvmppc_mmu_hash_pte_long(pte->pte.eaddr);
	hlist_add_head_rcu(&pte->list_pte_long,
			   &vcpu3s->hpte_hash_pte_long[index]);

	/* Add to vPTE list */
	index = kvmppc_mmu_hash_vpte(pte->pte.vpage);
	hlist_add_head_rcu(&pte->list_vpte, &vcpu3s->hpte_hash_vpte[index]);

	/* Add to vPTE_long list */
	index = kvmppc_mmu_hash_vpte_long(pte->pte.vpage);
	hlist_add_head_rcu(&pte->list_vpte_long,
			   &vcpu3s->hpte_hash_vpte_long[index]);

#ifdef CONFIG_PPC_BOOK3S_64
	/* Add to vPTE_64k list */
	index = kvmppc_mmu_hash_vpte_64k(pte->pte.vpage);
	hlist_add_head_rcu(&pte->list_vpte_64k,
			   &vcpu3s->hpte_hash_vpte_64k[index]);
#endif

	vcpu3s->hpte_cache_count++;

	spin_unlock(&vcpu3s->mmu_lock);
}

static void free_pte_rcu(struct rcu_head *head)
{
	struct hpte_cache *pte = container_of(head, struct hpte_cache, rcu_head);
	kmem_cache_free(hpte_cache, pte);
}

static void invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte)
{
	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);

	trace_kvm_book3s_mmu_invalidate(pte);

	/* Different for 32 and 64 bit */
	kvmppc_mmu_invalidate_pte(vcpu, pte);

	spin_lock(&vcpu3s->mmu_lock);

	/* pte already invalidated in between? */
	if (hlist_unhashed(&pte->list_pte)) {
		spin_unlock(&vcpu3s->mmu_lock);
		return;
	}

	hlist_del_init_rcu(&pte->list_pte);
	hlist_del_init_rcu(&pte->list_pte_long);
	hlist_del_init_rcu(&pte->list_vpte);
	hlist_del_init_rcu(&pte->list_vpte_long);
#ifdef CONFIG_PPC_BOOK3S_64
	hlist_del_init_rcu(&pte->list_vpte_64k);
#endif
	vcpu3s->hpte_cache_count--;

	spin_unlock(&vcpu3s->mmu_lock);

	call_rcu(&pte->rcu_head, free_pte_rcu);
}

static void kvmppc_mmu_pte_flush_all(struct kvm_vcpu *vcpu)
{
	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
	struct hpte_cache *pte;
	int i;

	rcu_read_lock();

	for (i = 0; i < HPTEG_HASH_NUM_VPTE_LONG; i++) {
		struct hlist_head *list = &vcpu3s->hpte_hash_vpte_long[i];

		hlist_for_each_entry_rcu(pte, list, list_vpte_long)
			invalidate_pte(vcpu, pte);
	}

	rcu_read_unlock();
}

static void kvmppc_mmu_pte_flush_page(struct kvm_vcpu *vcpu, ulong guest_ea)
{
	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
	struct hlist_head *list;
	struct hpte_cache *pte;

	/* Find the list of entries in the map */
	list = &vcpu3s->hpte_hash_pte[kvmppc_mmu_hash_pte(guest_ea)];

	rcu_read_lock();

	/* Check the list for matching entries and invalidate */
	hlist_for_each_entry_rcu(pte, list, list_pte)
		if ((pte->pte.eaddr & ~0xfffUL) == guest_ea)
			invalidate_pte(vcpu, pte);

	rcu_read_unlock();
}

static void kvmppc_mmu_pte_flush_long(struct kvm_vcpu *vcpu, ulong guest_ea)
{
	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
	struct hlist_head *list;
	struct hpte_cache *pte;

	/* Find the list of entries in the map */
	list = &vcpu3s->hpte_hash_pte_long[
			kvmppc_mmu_hash_pte_long(guest_ea)];

	rcu_read_lock();

	/* Check the list for matching entries and invalidate */
	hlist_for_each_entry_rcu(pte, list, list_pte_long)
		if ((pte->pte.eaddr & 0x0ffff000UL) == guest_ea)
			invalidate_pte(vcpu, pte);

	rcu_read_unlock();
}

void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong guest_ea, ulong ea_mask)
{
	trace_kvm_book3s_mmu_flush("", vcpu, guest_ea, ea_mask);
	guest_ea &= ea_mask;

	switch (ea_mask) {
	case ~0xfffUL:
		kvmppc_mmu_pte_flush_page(vcpu, guest_ea);
		break;
	case 0x0ffff000:
		kvmppc_mmu_pte_flush_long(vcpu, guest_ea);
		break;
	case 0:
		/* Doing a complete flush -> start from scratch */
		kvmppc_mmu_pte_flush_all(vcpu);
		break;
	default:
		WARN_ON(1);
		break;
	}
}

/* Flush with mask 0xfffffffff */
static void kvmppc_mmu_pte_vflush_short(struct kvm_vcpu *vcpu, u64 guest_vp)
{
	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
	struct hlist_head *list;
	struct hpte_cache *pte;
	u64 vp_mask = 0xfffffffffULL;

	list = &vcpu3s->hpte_hash_vpte[kvmppc_mmu_hash_vpte(guest_vp)];

	rcu_read_lock();

	/* Check the list for matching entries and invalidate */
	hlist_for_each_entry_rcu(pte, list, list_vpte)
		if ((pte->pte.vpage & vp_mask) == guest_vp)
			invalidate_pte(vcpu, pte);

	rcu_read_unlock();
}

#ifdef CONFIG_PPC_BOOK3S_64
/* Flush with mask 0xffffffff0 */
static void kvmppc_mmu_pte_vflush_64k(struct kvm_vcpu *vcpu, u64 guest_vp)
{
	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
	struct hlist_head *list;
	struct hpte_cache *pte;
	u64 vp_mask = 0xffffffff0ULL;

	list = &vcpu3s->hpte_hash_vpte_64k[
		kvmppc_mmu_hash_vpte_64k(guest_vp)];

	rcu_read_lock();

	/* Check the list for matching entries and invalidate */
	hlist_for_each_entry_rcu(pte, list, list_vpte_64k)
		if ((pte->pte.vpage & vp_mask) == guest_vp)
			invalidate_pte(vcpu, pte);

	rcu_read_unlock();
}
#endif

/* Flush with mask 0xffffff000 */
static void kvmppc_mmu_pte_vflush_long(struct kvm_vcpu *vcpu, u64 guest_vp)
{
	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
	struct hlist_head *list;
	struct hpte_cache *pte;
	u64 vp_mask = 0xffffff000ULL;

	list = &vcpu3s->hpte_hash_vpte_long[
		kvmppc_mmu_hash_vpte_long(guest_vp)];

	rcu_read_lock();

	/* Check the list for matching entries and invalidate */
	hlist_for_each_entry_rcu(pte, list, list_vpte_long)
		if ((pte->pte.vpage & vp_mask) == guest_vp)
			invalidate_pte(vcpu, pte);

	rcu_read_unlock();
}

void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 guest_vp, u64 vp_mask)
{
	trace_kvm_book3s_mmu_flush("v", vcpu, guest_vp, vp_mask);
	guest_vp &= vp_mask;

	switch(vp_mask) {
	case 0xfffffffffULL:
		kvmppc_mmu_pte_vflush_short(vcpu, guest_vp);
		break;
#ifdef CONFIG_PPC_BOOK3S_64
	case 0xffffffff0ULL:
		kvmppc_mmu_pte_vflush_64k(vcpu, guest_vp);
		break;
#endif
	case 0xffffff000ULL:
		kvmppc_mmu_pte_vflush_long(vcpu, guest_vp);
		break;
	default:
		WARN_ON(1);
		return;
	}
}

void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end)
{
	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
	struct hpte_cache *pte;
	int i;

	trace_kvm_book3s_mmu_flush("p", vcpu, pa_start, pa_end);

	rcu_read_lock();

	for (i = 0; i < HPTEG_HASH_NUM_VPTE_LONG; i++) {
		struct hlist_head *list = &vcpu3s->hpte_hash_vpte_long[i];

		hlist_for_each_entry_rcu(pte, list, list_vpte_long)
			if ((pte->pte.raddr >= pa_start) &&
			    (pte->pte.raddr < pa_end))
				invalidate_pte(vcpu, pte);
	}

	rcu_read_unlock();
}

struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu)
{
	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
	struct hpte_cache *pte;

	if (vcpu3s->hpte_cache_count == HPTEG_CACHE_NUM)
		kvmppc_mmu_pte_flush_all(vcpu);

	pte = kmem_cache_zalloc(hpte_cache, GFP_KERNEL);

	return pte;
}

void kvmppc_mmu_hpte_cache_free(struct hpte_cache *pte)
{
	kmem_cache_free(hpte_cache, pte);
}

void kvmppc_mmu_hpte_destroy(struct kvm_vcpu *vcpu)
{
	kvmppc_mmu_pte_flush(vcpu, 0, 0);
}

static void kvmppc_mmu_hpte_init_hash(struct hlist_head *hash_list, int len)
{
	int i;

	for (i = 0; i < len; i++)
		INIT_HLIST_HEAD(&hash_list[i]);
}

int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu)
{
	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);

	/* init hpte lookup hashes */
	kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_pte,
				  ARRAY_SIZE(vcpu3s->hpte_hash_pte));
	kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_pte_long,
				  ARRAY_SIZE(vcpu3s->hpte_hash_pte_long));
	kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_vpte,
				  ARRAY_SIZE(vcpu3s->hpte_hash_vpte));
	kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_vpte_long,
				  ARRAY_SIZE(vcpu3s->hpte_hash_vpte_long));
#ifdef CONFIG_PPC_BOOK3S_64
	kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_vpte_64k,
				  ARRAY_SIZE(vcpu3s->hpte_hash_vpte_64k));
#endif

	spin_lock_init(&vcpu3s->mmu_lock);

	return 0;
}

int kvmppc_mmu_hpte_sysinit(void)
{
	/* init hpte slab cache */
	hpte_cache = kmem_cache_create("kvm-spt", sizeof(struct hpte_cache),
				       sizeof(struct hpte_cache), 0, NULL);

	return 0;
}

void kvmppc_mmu_hpte_sysexit(void)
{
	kmem_cache_destroy(hpte_cache);
}
Commit	Line	Data
7741909b AG	1	/*
	2	* Copyright (C) 2010 SUSE Linux Products GmbH. All rights reserved.
	3	*
	4	* Authors:
	5	* Alexander Graf <agraf@suse.de>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License, version 2, as
	9	* published by the Free Software Foundation.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
	19	*/
	20
	21	#include <linux/kvm_host.h>
	22	#include <linux/hash.h>
	23	#include <linux/slab.h>
b2d09103	24	#include <linux/rculist.h>
7741909b AG	25
	26	#include <asm/kvm_ppc.h>
	27	#include <asm/kvm_book3s.h>
	28	#include <asm/machdep.h>
	29	#include <asm/mmu_context.h>
	30	#include <asm/hw_irq.h>
	31
72c12535	32	#include "trace_pr.h"
c4befc58	33
7741909b AG	34	#define PTE_SIZE 12
7741909b AG	35
7741909b AG	36	static struct kmem_cache *hpte_cache;
	37
	38	static inline u64 kvmppc_mmu_hash_pte(u64 eaddr)
	39	{
	40	return hash_64(eaddr >> PTE_SIZE, HPTEG_HASH_BITS_PTE);
	41	}
	42
2d27fc5e AG	43	static inline u64 kvmppc_mmu_hash_pte_long(u64 eaddr)
	44	{
	45	return hash_64((eaddr & 0x0ffff000) >> PTE_SIZE,
	46	HPTEG_HASH_BITS_PTE_LONG);
	47	}
	48
7741909b AG	49	static inline u64 kvmppc_mmu_hash_vpte(u64 vpage)
	50	{
	51	return hash_64(vpage & 0xfffffffffULL, HPTEG_HASH_BITS_VPTE);
	52	}
	53
	54	static inline u64 kvmppc_mmu_hash_vpte_long(u64 vpage)
	55	{
	56	return hash_64((vpage & 0xffffff000ULL) >> 12,
	57	HPTEG_HASH_BITS_VPTE_LONG);
	58	}
	59
a4a0f252 PM	60	#ifdef CONFIG_PPC_BOOK3S_64
	61	static inline u64 kvmppc_mmu_hash_vpte_64k(u64 vpage)
	62	{
	63	return hash_64((vpage & 0xffffffff0ULL) >> 4,
	64	HPTEG_HASH_BITS_VPTE_64K);
	65	}
	66	#endif
	67
7741909b AG	68	void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu vcpu, struct hpte_cache pte)
	69	{
	70	u64 index;
c4befc58	71	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
7741909b	72
4c4eea77 AG	73	trace_kvm_book3s_mmu_map(pte);
4c4eea77 AG	74
c4befc58	75	spin_lock(&vcpu3s->mmu_lock);
2e0908af	76
7741909b AG	77	/* Add to ePTE list */
7741909b AG	78	index = kvmppc_mmu_hash_pte(pte->pte.eaddr);
c4befc58	79	hlist_add_head_rcu(&pte->list_pte, &vcpu3s->hpte_hash_pte[index]);
7741909b	80
2d27fc5e AG	81	/* Add to ePTE_long list */
	82	index = kvmppc_mmu_hash_pte_long(pte->pte.eaddr);
	83	hlist_add_head_rcu(&pte->list_pte_long,
c4befc58	84	&vcpu3s->hpte_hash_pte_long[index]);
2d27fc5e	85
7741909b AG	86	/* Add to vPTE list */
7741909b AG	87	index = kvmppc_mmu_hash_vpte(pte->pte.vpage);
c4befc58	88	hlist_add_head_rcu(&pte->list_vpte, &vcpu3s->hpte_hash_vpte[index]);
7741909b AG	89
	90	/* Add to vPTE_long list */
	91	index = kvmppc_mmu_hash_vpte_long(pte->pte.vpage);
2e0908af	92	hlist_add_head_rcu(&pte->list_vpte_long,
c4befc58	93	&vcpu3s->hpte_hash_vpte_long[index]);
2e0908af	94
a4a0f252 PM	95	#ifdef CONFIG_PPC_BOOK3S_64
	96	/* Add to vPTE_64k list */
	97	index = kvmppc_mmu_hash_vpte_64k(pte->pte.vpage);
	98	hlist_add_head_rcu(&pte->list_vpte_64k,
	99	&vcpu3s->hpte_hash_vpte_64k[index]);
	100	#endif
	101
d78bca72 PM	102	vcpu3s->hpte_cache_count++;
d78bca72 PM	103
c4befc58	104	spin_unlock(&vcpu3s->mmu_lock);
2e0908af AG	105	}
	106
	107	static void free_pte_rcu(struct rcu_head *head)
	108	{
	109	struct hpte_cache *pte = container_of(head, struct hpte_cache, rcu_head);
	110	kmem_cache_free(hpte_cache, pte);
7741909b AG	111	}
	112
	113	static void invalidate_pte(struct kvm_vcpu vcpu, struct hpte_cache pte)
	114	{
c4befc58 PM	115	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
c4befc58 PM	116
8696ee43	117	trace_kvm_book3s_mmu_invalidate(pte);
7741909b AG	118
	119	/* Different for 32 and 64 bit */
	120	kvmppc_mmu_invalidate_pte(vcpu, pte);
	121
c4befc58	122	spin_lock(&vcpu3s->mmu_lock);
2e0908af	123
e7c1d14e AG	124	/* pte already invalidated in between? */
e7c1d14e AG	125	if (hlist_unhashed(&pte->list_pte)) {
c4befc58	126	spin_unlock(&vcpu3s->mmu_lock);
e7c1d14e AG	127	return;
	128	}
	129
2e0908af	130	hlist_del_init_rcu(&pte->list_pte);
2d27fc5e	131	hlist_del_init_rcu(&pte->list_pte_long);
2e0908af AG	132	hlist_del_init_rcu(&pte->list_vpte);
2e0908af AG	133	hlist_del_init_rcu(&pte->list_vpte_long);
a4a0f252 PM	134	#ifdef CONFIG_PPC_BOOK3S_64
	135	hlist_del_init_rcu(&pte->list_vpte_64k);
	136	#endif
d78bca72	137	vcpu3s->hpte_cache_count--;
2e0908af	138
c4befc58	139	spin_unlock(&vcpu3s->mmu_lock);
e7c1d14e	140
2e0908af	141	call_rcu(&pte->rcu_head, free_pte_rcu);
7741909b AG	142	}
	143
	144	static void kvmppc_mmu_pte_flush_all(struct kvm_vcpu *vcpu)
	145	{
c4befc58	146	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
7741909b	147	struct hpte_cache *pte;
7741909b AG	148	int i;
7741909b AG	149
2e0908af AG	150	rcu_read_lock();
2e0908af AG	151
7741909b	152	for (i = 0; i < HPTEG_HASH_NUM_VPTE_LONG; i++) {
c4befc58	153	struct hlist_head *list = &vcpu3s->hpte_hash_vpte_long[i];
7741909b	154
b67bfe0d	155	hlist_for_each_entry_rcu(pte, list, list_vpte_long)
7741909b AG	156	invalidate_pte(vcpu, pte);
7741909b AG	157	}
2e0908af AG	158
2e0908af AG	159	rcu_read_unlock();
7741909b AG	160	}
	161
	162	static void kvmppc_mmu_pte_flush_page(struct kvm_vcpu *vcpu, ulong guest_ea)
	163	{
c4befc58	164	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
7741909b	165	struct hlist_head *list;
7741909b AG	166	struct hpte_cache *pte;
	167
	168	/* Find the list of entries in the map */
c4befc58	169	list = &vcpu3s->hpte_hash_pte[kvmppc_mmu_hash_pte(guest_ea)];
7741909b	170
2e0908af AG	171	rcu_read_lock();
2e0908af AG	172
7741909b	173	/* Check the list for matching entries and invalidate */
b67bfe0d	174	hlist_for_each_entry_rcu(pte, list, list_pte)
7741909b AG	175	if ((pte->pte.eaddr & ~0xfffUL) == guest_ea)
7741909b AG	176	invalidate_pte(vcpu, pte);
2e0908af AG	177
2e0908af AG	178	rcu_read_unlock();
7741909b AG	179	}
7741909b AG	180
2d27fc5e	181	static void kvmppc_mmu_pte_flush_long(struct kvm_vcpu *vcpu, ulong guest_ea)
7741909b	182	{
c4befc58	183	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
2d27fc5e	184	struct hlist_head *list;
2d27fc5e AG	185	struct hpte_cache *pte;
	186
	187	/* Find the list of entries in the map */
c4befc58	188	list = &vcpu3s->hpte_hash_pte_long[
2d27fc5e	189	kvmppc_mmu_hash_pte_long(guest_ea)];
7741909b	190
2d27fc5e AG	191	rcu_read_lock();
	192
	193	/* Check the list for matching entries and invalidate */
b67bfe0d	194	hlist_for_each_entry_rcu(pte, list, list_pte_long)
2d27fc5e AG	195	if ((pte->pte.eaddr & 0x0ffff000UL) == guest_ea)
	196	invalidate_pte(vcpu, pte);
	197
	198	rcu_read_unlock();
	199	}
	200
	201	void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong guest_ea, ulong ea_mask)
	202	{
c60b4cf7	203	trace_kvm_book3s_mmu_flush("", vcpu, guest_ea, ea_mask);
7741909b AG	204	guest_ea &= ea_mask;
	205
	206	switch (ea_mask) {
	207	case ~0xfffUL:
	208	kvmppc_mmu_pte_flush_page(vcpu, guest_ea);
	209	break;
	210	case 0x0ffff000:
2d27fc5e	211	kvmppc_mmu_pte_flush_long(vcpu, guest_ea);
7741909b AG	212	break;
	213	case 0:
	214	/* Doing a complete flush -> start from scratch */
	215	kvmppc_mmu_pte_flush_all(vcpu);
	216	break;
	217	default:
	218	WARN_ON(1);
	219	break;
	220	}
	221	}
	222
	223	/* Flush with mask 0xfffffffff */
	224	static void kvmppc_mmu_pte_vflush_short(struct kvm_vcpu *vcpu, u64 guest_vp)
	225	{
c4befc58	226	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
7741909b	227	struct hlist_head *list;
7741909b AG	228	struct hpte_cache *pte;
	229	u64 vp_mask = 0xfffffffffULL;
	230
c4befc58	231	list = &vcpu3s->hpte_hash_vpte[kvmppc_mmu_hash_vpte(guest_vp)];
7741909b	232
2e0908af AG	233	rcu_read_lock();
2e0908af AG	234
7741909b	235	/* Check the list for matching entries and invalidate */
b67bfe0d	236	hlist_for_each_entry_rcu(pte, list, list_vpte)
7741909b AG	237	if ((pte->pte.vpage & vp_mask) == guest_vp)
7741909b AG	238	invalidate_pte(vcpu, pte);
2e0908af AG	239
2e0908af AG	240	rcu_read_unlock();
7741909b AG	241	}
7741909b AG	242
a4a0f252 PM	243	#ifdef CONFIG_PPC_BOOK3S_64
	244	/* Flush with mask 0xffffffff0 */
	245	static void kvmppc_mmu_pte_vflush_64k(struct kvm_vcpu *vcpu, u64 guest_vp)
	246	{
	247	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
	248	struct hlist_head *list;
	249	struct hpte_cache *pte;
	250	u64 vp_mask = 0xffffffff0ULL;
	251
	252	list = &vcpu3s->hpte_hash_vpte_64k[
	253	kvmppc_mmu_hash_vpte_64k(guest_vp)];
	254
	255	rcu_read_lock();
	256
	257	/* Check the list for matching entries and invalidate */
	258	hlist_for_each_entry_rcu(pte, list, list_vpte_64k)
	259	if ((pte->pte.vpage & vp_mask) == guest_vp)
	260	invalidate_pte(vcpu, pte);
	261
	262	rcu_read_unlock();
	263	}
	264	#endif
	265
7741909b AG	266	/* Flush with mask 0xffffff000 */
	267	static void kvmppc_mmu_pte_vflush_long(struct kvm_vcpu *vcpu, u64 guest_vp)
	268	{
c4befc58	269	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
7741909b	270	struct hlist_head *list;
7741909b AG	271	struct hpte_cache *pte;
	272	u64 vp_mask = 0xffffff000ULL;
	273
c4befc58	274	list = &vcpu3s->hpte_hash_vpte_long[
7741909b AG	275	kvmppc_mmu_hash_vpte_long(guest_vp)];
7741909b AG	276
2e0908af AG	277	rcu_read_lock();
2e0908af AG	278
7741909b	279	/* Check the list for matching entries and invalidate */
b67bfe0d	280	hlist_for_each_entry_rcu(pte, list, list_vpte_long)
7741909b AG	281	if ((pte->pte.vpage & vp_mask) == guest_vp)
7741909b AG	282	invalidate_pte(vcpu, pte);
2e0908af AG	283
2e0908af AG	284	rcu_read_unlock();
7741909b AG	285	}
	286
	287	void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 guest_vp, u64 vp_mask)
	288	{
c60b4cf7	289	trace_kvm_book3s_mmu_flush("v", vcpu, guest_vp, vp_mask);
7741909b AG	290	guest_vp &= vp_mask;
	291
	292	switch(vp_mask) {
	293	case 0xfffffffffULL:
	294	kvmppc_mmu_pte_vflush_short(vcpu, guest_vp);
	295	break;
a4a0f252 PM	296	#ifdef CONFIG_PPC_BOOK3S_64
	297	case 0xffffffff0ULL:
	298	kvmppc_mmu_pte_vflush_64k(vcpu, guest_vp);
	299	break;
	300	#endif
7741909b AG	301	case 0xffffff000ULL:
	302	kvmppc_mmu_pte_vflush_long(vcpu, guest_vp);
	303	break;
	304	default:
	305	WARN_ON(1);
	306	return;
	307	}
	308	}
	309
	310	void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end)
	311	{
c4befc58	312	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
7741909b AG	313	struct hpte_cache *pte;
	314	int i;
	315
c60b4cf7	316	trace_kvm_book3s_mmu_flush("p", vcpu, pa_start, pa_end);
7741909b	317
2e0908af AG	318	rcu_read_lock();
2e0908af AG	319
7741909b	320	for (i = 0; i < HPTEG_HASH_NUM_VPTE_LONG; i++) {
c4befc58	321	struct hlist_head *list = &vcpu3s->hpte_hash_vpte_long[i];
7741909b	322
b67bfe0d	323	hlist_for_each_entry_rcu(pte, list, list_vpte_long)
7741909b AG	324	if ((pte->pte.raddr >= pa_start) &&
	325	(pte->pte.raddr < pa_end))
	326	invalidate_pte(vcpu, pte);
	327	}
2e0908af AG	328
2e0908af AG	329	rcu_read_unlock();
7741909b AG	330	}
	331
	332	struct hpte_cache kvmppc_mmu_hpte_cache_next(struct kvm_vcpu vcpu)
	333	{
c4befc58	334	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
7741909b AG	335	struct hpte_cache *pte;
7741909b AG	336
c4befc58	337	if (vcpu3s->hpte_cache_count == HPTEG_CACHE_NUM)
7741909b AG	338	kvmppc_mmu_pte_flush_all(vcpu);
7741909b AG	339
d78bca72 PM	340	pte = kmem_cache_zalloc(hpte_cache, GFP_KERNEL);
d78bca72 PM	341
7741909b AG	342	return pte;
	343	}
	344
d78bca72 PM	345	void kvmppc_mmu_hpte_cache_free(struct hpte_cache *pte)
	346	{
	347	kmem_cache_free(hpte_cache, pte);
	348	}
	349
7741909b AG	350	void kvmppc_mmu_hpte_destroy(struct kvm_vcpu *vcpu)
	351	{
	352	kvmppc_mmu_pte_flush(vcpu, 0, 0);
	353	}
	354
	355	static void kvmppc_mmu_hpte_init_hash(struct hlist_head *hash_list, int len)
	356	{
	357	int i;
	358
	359	for (i = 0; i < len; i++)
	360	INIT_HLIST_HEAD(&hash_list[i]);
	361	}
	362
	363	int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu)
	364	{
c4befc58 PM	365	struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
c4befc58 PM	366
7741909b	367	/* init hpte lookup hashes */
c4befc58 PM	368	kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_pte,
	369	ARRAY_SIZE(vcpu3s->hpte_hash_pte));
	370	kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_pte_long,
	371	ARRAY_SIZE(vcpu3s->hpte_hash_pte_long));
	372	kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_vpte,
	373	ARRAY_SIZE(vcpu3s->hpte_hash_vpte));
	374	kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_vpte_long,
	375	ARRAY_SIZE(vcpu3s->hpte_hash_vpte_long));
a4a0f252 PM	376	#ifdef CONFIG_PPC_BOOK3S_64
	377	kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_vpte_64k,
	378	ARRAY_SIZE(vcpu3s->hpte_hash_vpte_64k));
	379	#endif
c4befc58 PM	380
c4befc58 PM	381	spin_lock_init(&vcpu3s->mmu_lock);
2e0908af	382
7741909b AG	383	return 0;
	384	}
	385
	386	int kvmppc_mmu_hpte_sysinit(void)
	387	{
	388	/* init hpte slab cache */
	389	hpte_cache = kmem_cache_create("kvm-spt", sizeof(struct hpte_cache),
	390	sizeof(struct hpte_cache), 0, NULL);
	391
	392	return 0;
	393	}
	394
	395	void kvmppc_mmu_hpte_sysexit(void)
	396	{
	397	kmem_cache_destroy(hpte_cache);
	398	}