[linux-2.6-block.git] / arch / powerpc / kvm / book3s_64_mmu.c

/*
 * 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.
 *
 * Copyright SUSE Linux Products GmbH 2009
 *
 * Authors: Alexander Graf <agraf@suse.de>
 */

#include <linux/types.h>
#include <linux/string.h>
#include <linux/kvm.h>
#include <linux/kvm_host.h>
#include <linux/highmem.h>

#include <asm/tlbflush.h>
#include <asm/kvm_ppc.h>
#include <asm/kvm_book3s.h>

/* #define DEBUG_MMU */

#ifdef DEBUG_MMU
#define dprintk(X...) printk(KERN_INFO X)
#else
#define dprintk(X...) do { } while(0)
#endif

static void kvmppc_mmu_book3s_64_reset_msr(struct kvm_vcpu *vcpu)
{
	kvmppc_set_msr(vcpu, MSR_SF);
}

static struct kvmppc_slb *kvmppc_mmu_book3s_64_find_slbe(
				struct kvmppc_vcpu_book3s *vcpu_book3s,
				gva_t eaddr)
{
	int i;
	u64 esid = GET_ESID(eaddr);
	u64 esid_1t = GET_ESID_1T(eaddr);

	for (i = 0; i < vcpu_book3s->slb_nr; i++) {
		u64 cmp_esid = esid;

		if (!vcpu_book3s->slb[i].valid)
			continue;

		if (vcpu_book3s->slb[i].large)
			cmp_esid = esid_1t;

		if (vcpu_book3s->slb[i].esid == cmp_esid)
			return &vcpu_book3s->slb[i];
	}

	dprintk("KVM: No SLB entry found for 0x%lx [%llx | %llx]\n",
		eaddr, esid, esid_1t);
	for (i = 0; i < vcpu_book3s->slb_nr; i++) {
	    if (vcpu_book3s->slb[i].vsid)
		dprintk("  %d: %c%c %llx %llx\n", i,
			vcpu_book3s->slb[i].valid ? 'v' : ' ',
			vcpu_book3s->slb[i].large ? 'l' : ' ',
			vcpu_book3s->slb[i].esid,
			vcpu_book3s->slb[i].vsid);
	}

	return NULL;
}

static u64 kvmppc_mmu_book3s_64_ea_to_vp(struct kvm_vcpu *vcpu, gva_t eaddr,
					 bool data)
{
	struct kvmppc_slb *slb;

	slb = kvmppc_mmu_book3s_64_find_slbe(to_book3s(vcpu), eaddr);
	if (!slb)
		return 0;

	if (slb->large)
		return (((u64)eaddr >> 12) & 0xfffffff) |
		       (((u64)slb->vsid) << 28);

	return (((u64)eaddr >> 12) & 0xffff) | (((u64)slb->vsid) << 16);
}

static int kvmppc_mmu_book3s_64_get_pagesize(struct kvmppc_slb *slbe)
{
	return slbe->large ? 24 : 12;
}

static u32 kvmppc_mmu_book3s_64_get_page(struct kvmppc_slb *slbe, gva_t eaddr)
{
	int p = kvmppc_mmu_book3s_64_get_pagesize(slbe);
	return ((eaddr & 0xfffffff) >> p);
}

static hva_t kvmppc_mmu_book3s_64_get_pteg(
				struct kvmppc_vcpu_book3s *vcpu_book3s,
				struct kvmppc_slb *slbe, gva_t eaddr,
				bool second)
{
	u64 hash, pteg, htabsize;
	u32 page;
	hva_t r;

	page = kvmppc_mmu_book3s_64_get_page(slbe, eaddr);
	htabsize = ((1 << ((vcpu_book3s->sdr1 & 0x1f) + 11)) - 1);

	hash = slbe->vsid ^ page;
	if (second)
		hash = ~hash;
	hash &= ((1ULL << 39ULL) - 1ULL);
	hash &= htabsize;
	hash <<= 7ULL;

	pteg = vcpu_book3s->sdr1 & 0xfffffffffffc0000ULL;
	pteg |= hash;

	dprintk("MMU: page=0x%x sdr1=0x%llx pteg=0x%llx vsid=0x%llx\n",
		page, vcpu_book3s->sdr1, pteg, slbe->vsid);

	r = gfn_to_hva(vcpu_book3s->vcpu.kvm, pteg >> PAGE_SHIFT);
	if (kvm_is_error_hva(r))
		return r;
	return r | (pteg & ~PAGE_MASK);
}

static u64 kvmppc_mmu_book3s_64_get_avpn(struct kvmppc_slb *slbe, gva_t eaddr)
{
	int p = kvmppc_mmu_book3s_64_get_pagesize(slbe);
	u64 avpn;

	avpn = kvmppc_mmu_book3s_64_get_page(slbe, eaddr);
	avpn |= slbe->vsid << (28 - p);

	if (p < 24)
		avpn >>= ((80 - p) - 56) - 8;
	else
		avpn <<= 8;

	return avpn;
}

static int kvmppc_mmu_book3s_64_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
				struct kvmppc_pte *gpte, bool data)
{
	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
	struct kvmppc_slb *slbe;
	hva_t ptegp;
	u64 pteg[16];
	u64 avpn = 0;
	int i;
	u8 key = 0;
	bool found = false;
	bool perm_err = false;
	int second = 0;

	slbe = kvmppc_mmu_book3s_64_find_slbe(vcpu_book3s, eaddr);
	if (!slbe)
		goto no_seg_found;

do_second:
	ptegp = kvmppc_mmu_book3s_64_get_pteg(vcpu_book3s, slbe, eaddr, second);
	if (kvm_is_error_hva(ptegp))
		goto no_page_found;

	avpn = kvmppc_mmu_book3s_64_get_avpn(slbe, eaddr);

	if(copy_from_user(pteg, (void __user *)ptegp, sizeof(pteg))) {
		printk(KERN_ERR "KVM can't copy data from 0x%lx!\n", ptegp);
		goto no_page_found;
	}

	if ((vcpu->arch.msr & MSR_PR) && slbe->Kp)
		key = 4;
	else if (!(vcpu->arch.msr & MSR_PR) && slbe->Ks)
		key = 4;

	for (i=0; i<16; i+=2) {
		u64 v = pteg[i];
		u64 r = pteg[i+1];

		/* Valid check */
		if (!(v & HPTE_V_VALID))
			continue;
		/* Hash check */
		if ((v & HPTE_V_SECONDARY) != second)
			continue;

		/* AVPN compare */
		if (HPTE_V_AVPN_VAL(avpn) == HPTE_V_AVPN_VAL(v)) {
			u8 pp = (r & HPTE_R_PP) | key;
			int eaddr_mask = 0xFFF;

			gpte->eaddr = eaddr;
			gpte->vpage = kvmppc_mmu_book3s_64_ea_to_vp(vcpu,
								    eaddr,
								    data);
			if (slbe->large)
				eaddr_mask = 0xFFFFFF;
			gpte->raddr = (r & HPTE_R_RPN) | (eaddr & eaddr_mask);
			gpte->may_execute = ((r & HPTE_R_N) ? false : true);
			gpte->may_read = false;
			gpte->may_write = false;

			switch (pp) {
			case 0:
			case 1:
			case 2:
			case 6:
				gpte->may_write = true;
				/* fall through */
			case 3:
			case 5:
			case 7:
				gpte->may_read = true;
				break;
			}

			if (!gpte->may_read) {
				perm_err = true;
				continue;
			}

			dprintk("KVM MMU: Translated 0x%lx [0x%llx] -> 0x%llx "
				"-> 0x%llx\n",
				eaddr, avpn, gpte->vpage, gpte->raddr);
			found = true;
			break;
		}
	}

	/* Update PTE R and C bits, so the guest's swapper knows we used the
	 * page */
	if (found) {
		u32 oldr = pteg[i+1];

		if (gpte->may_read) {
			/* Set the accessed flag */
			pteg[i+1] |= HPTE_R_R;
		}
		if (gpte->may_write) {
			/* Set the dirty flag */
			pteg[i+1] |= HPTE_R_C;
		} else {
			dprintk("KVM: Mapping read-only page!\n");
		}

		/* Write back into the PTEG */
		if (pteg[i+1] != oldr)
			copy_to_user((void __user *)ptegp, pteg, sizeof(pteg));

		return 0;
	} else {
		dprintk("KVM MMU: No PTE found (ea=0x%lx sdr1=0x%llx "
			"ptegp=0x%lx)\n",
			eaddr, to_book3s(vcpu)->sdr1, ptegp);
		for (i = 0; i < 16; i += 2)
			dprintk("   %02d: 0x%llx - 0x%llx (0x%llx)\n",
				i, pteg[i], pteg[i+1], avpn);

		if (!second) {
			second = HPTE_V_SECONDARY;
			goto do_second;
		}
	}


no_page_found:


	if (perm_err)
		return -EPERM;

	return -ENOENT;

no_seg_found:

	dprintk("KVM MMU: Trigger segment fault\n");
	return -EINVAL;
}

static void kvmppc_mmu_book3s_64_slbmte(struct kvm_vcpu *vcpu, u64 rs, u64 rb)
{
	struct kvmppc_vcpu_book3s *vcpu_book3s;
	u64 esid, esid_1t;
	int slb_nr;
	struct kvmppc_slb *slbe;

	dprintk("KVM MMU: slbmte(0x%llx, 0x%llx)\n", rs, rb);

	vcpu_book3s = to_book3s(vcpu);

	esid = GET_ESID(rb);
	esid_1t = GET_ESID_1T(rb);
	slb_nr = rb & 0xfff;

	if (slb_nr > vcpu_book3s->slb_nr)
		return;

	slbe = &vcpu_book3s->slb[slb_nr];

	slbe->large = (rs & SLB_VSID_L) ? 1 : 0;
	slbe->esid  = slbe->large ? esid_1t : esid;
	slbe->vsid  = rs >> 12;
	slbe->valid = (rb & SLB_ESID_V) ? 1 : 0;
	slbe->Ks    = (rs & SLB_VSID_KS) ? 1 : 0;
	slbe->Kp    = (rs & SLB_VSID_KP) ? 1 : 0;
	slbe->nx    = (rs & SLB_VSID_N) ? 1 : 0;
	slbe->class = (rs & SLB_VSID_C) ? 1 : 0;

	slbe->orige = rb & (ESID_MASK | SLB_ESID_V);
	slbe->origv = rs;

	/* Map the new segment */
	kvmppc_mmu_map_segment(vcpu, esid << SID_SHIFT);
}

static u64 kvmppc_mmu_book3s_64_slbmfee(struct kvm_vcpu *vcpu, u64 slb_nr)
{
	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
	struct kvmppc_slb *slbe;

	if (slb_nr > vcpu_book3s->slb_nr)
		return 0;

	slbe = &vcpu_book3s->slb[slb_nr];

	return slbe->orige;
}

static u64 kvmppc_mmu_book3s_64_slbmfev(struct kvm_vcpu *vcpu, u64 slb_nr)
{
	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
	struct kvmppc_slb *slbe;

	if (slb_nr > vcpu_book3s->slb_nr)
		return 0;

	slbe = &vcpu_book3s->slb[slb_nr];

	return slbe->origv;
}

static void kvmppc_mmu_book3s_64_slbie(struct kvm_vcpu *vcpu, u64 ea)
{
	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
	struct kvmppc_slb *slbe;

	dprintk("KVM MMU: slbie(0x%llx)\n", ea);

	slbe = kvmppc_mmu_book3s_64_find_slbe(vcpu_book3s, ea);

	if (!slbe)
		return;

	dprintk("KVM MMU: slbie(0x%llx, 0x%llx)\n", ea, slbe->esid);

	slbe->valid = false;

	kvmppc_mmu_map_segment(vcpu, ea);
}

static void kvmppc_mmu_book3s_64_slbia(struct kvm_vcpu *vcpu)
{
	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
	int i;

	dprintk("KVM MMU: slbia()\n");

	for (i = 1; i < vcpu_book3s->slb_nr; i++)
		vcpu_book3s->slb[i].valid = false;

	if (vcpu->arch.msr & MSR_IR) {
		kvmppc_mmu_flush_segments(vcpu);
		kvmppc_mmu_map_segment(vcpu, vcpu->arch.pc);
	}
}

static void kvmppc_mmu_book3s_64_mtsrin(struct kvm_vcpu *vcpu, u32 srnum,
					ulong value)
{
	u64 rb = 0, rs = 0;

	/* ESID = srnum */
	rb |= (srnum & 0xf) << 28;
	/* Set the valid bit */
	rb |= 1 << 27;
	/* Index = ESID */
	rb |= srnum;

	/* VSID = VSID */
	rs |= (value & 0xfffffff) << 12;
	/* flags = flags */
	rs |= ((value >> 27) & 0xf) << 9;

	kvmppc_mmu_book3s_64_slbmte(vcpu, rs, rb);
}

static void kvmppc_mmu_book3s_64_tlbie(struct kvm_vcpu *vcpu, ulong va,
				       bool large)
{
	u64 mask = 0xFFFFFFFFFULL;

	dprintk("KVM MMU: tlbie(0x%lx)\n", va);

	if (large)
		mask = 0xFFFFFF000ULL;
	kvmppc_mmu_pte_vflush(vcpu, va >> 12, mask);
}

static int kvmppc_mmu_book3s_64_esid_to_vsid(struct kvm_vcpu *vcpu, u64 esid,
					     u64 *vsid)
{
	switch (vcpu->arch.msr & (MSR_DR|MSR_IR)) {
	case 0:
		*vsid = (VSID_REAL >> 16) | esid;
		break;
	case MSR_IR:
		*vsid = (VSID_REAL_IR >> 16) | esid;
		break;
	case MSR_DR:
		*vsid = (VSID_REAL_DR >> 16) | esid;
		break;
	case MSR_DR|MSR_IR:
	{
		ulong ea;
		struct kvmppc_slb *slb;
		ea = esid << SID_SHIFT;
		slb = kvmppc_mmu_book3s_64_find_slbe(to_book3s(vcpu), ea);
		if (slb)
			*vsid = slb->vsid;
		else
			return -ENOENT;

		break;
	}
	default:
		BUG();
		break;
	}

	return 0;
}

static bool kvmppc_mmu_book3s_64_is_dcbz32(struct kvm_vcpu *vcpu)
{
	return (to_book3s(vcpu)->hid[5] & 0x80);
}

void kvmppc_mmu_book3s_64_init(struct kvm_vcpu *vcpu)
{
	struct kvmppc_mmu *mmu = &vcpu->arch.mmu;

	mmu->mfsrin = NULL;
	mmu->mtsrin = kvmppc_mmu_book3s_64_mtsrin;
	mmu->slbmte = kvmppc_mmu_book3s_64_slbmte;
	mmu->slbmfee = kvmppc_mmu_book3s_64_slbmfee;
	mmu->slbmfev = kvmppc_mmu_book3s_64_slbmfev;
	mmu->slbie = kvmppc_mmu_book3s_64_slbie;
	mmu->slbia = kvmppc_mmu_book3s_64_slbia;
	mmu->xlate = kvmppc_mmu_book3s_64_xlate;
	mmu->reset_msr = kvmppc_mmu_book3s_64_reset_msr;
	mmu->tlbie = kvmppc_mmu_book3s_64_tlbie;
	mmu->esid_to_vsid = kvmppc_mmu_book3s_64_esid_to_vsid;
	mmu->ea_to_vp = kvmppc_mmu_book3s_64_ea_to_vp;
	mmu->is_dcbz32 = kvmppc_mmu_book3s_64_is_dcbz32;
}
Commit	Line	Data
e71b2a39 AG	1	/*
	2	* This program is free software; you can redistribute it and/or modify
	3	* it under the terms of the GNU General Public License, version 2, as
	4	* published by the Free Software Foundation.
	5	*
	6	* This program is distributed in the hope that it will be useful,
	7	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	8	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	9	* GNU General Public License for more details.
	10	*
	11	* You should have received a copy of the GNU General Public License
	12	* along with this program; if not, write to the Free Software
	13	* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
	14	*
	15	* Copyright SUSE Linux Products GmbH 2009
	16	*
	17	* Authors: Alexander Graf <agraf@suse.de>
	18	*/
	19
	20	#include <linux/types.h>
	21	#include <linux/string.h>
	22	#include <linux/kvm.h>
	23	#include <linux/kvm_host.h>
	24	#include <linux/highmem.h>
	25
	26	#include <asm/tlbflush.h>
	27	#include <asm/kvm_ppc.h>
	28	#include <asm/kvm_book3s.h>
	29
	30	/* #define DEBUG_MMU */
	31
	32	#ifdef DEBUG_MMU
	33	#define dprintk(X...) printk(KERN_INFO X)
	34	#else
	35	#define dprintk(X...) do { } while(0)
	36	#endif
	37
	38	static void kvmppc_mmu_book3s_64_reset_msr(struct kvm_vcpu *vcpu)
	39	{
	40	kvmppc_set_msr(vcpu, MSR_SF);
	41	}
	42
	43	static struct kvmppc_slb *kvmppc_mmu_book3s_64_find_slbe(
	44	struct kvmppc_vcpu_book3s *vcpu_book3s,
	45	gva_t eaddr)
	46	{
	47	int i;
	48	u64 esid = GET_ESID(eaddr);
	49	u64 esid_1t = GET_ESID_1T(eaddr);
	50
	51	for (i = 0; i < vcpu_book3s->slb_nr; i++) {
	52	u64 cmp_esid = esid;
	53
	54	if (!vcpu_book3s->slb[i].valid)
	55	continue;
	56
	57	if (vcpu_book3s->slb[i].large)
	58	cmp_esid = esid_1t;
	59
	60	if (vcpu_book3s->slb[i].esid == cmp_esid)
	61	return &vcpu_book3s->slb[i];
	62	}
	63
	64	dprintk("KVM: No SLB entry found for 0x%lx [%llx \| %llx]\n",
65	eaddr, esid, esid_1t);
66	for (i = 0; i < vcpu_book3s->slb_nr; i++) {
67	if (vcpu_book3s->slb[i].vsid)
68	dprintk(" %d: %c%c %llx %llx\n", i,
69	vcpu_book3s->slb[i].valid ? 'v' : ' ',
70	vcpu_book3s->slb[i].large ? 'l' : ' ',
71	vcpu_book3s->slb[i].esid,
72	vcpu_book3s->slb[i].vsid);
73	}
74
75	return NULL;
76	}
77
78	static u64 kvmppc_mmu_book3s_64_ea_to_vp(struct kvm_vcpu *vcpu, gva_t eaddr,
79	bool data)
80	{
81	struct kvmppc_slb *slb;
82
83	slb = kvmppc_mmu_book3s_64_find_slbe(to_book3s(vcpu), eaddr);
84	if (!slb)
85	return 0;
86
87	if (slb->large)
88	return (((u64)eaddr >> 12) & 0xfffffff) \|
89	(((u64)slb->vsid) << 28);
90
91	return (((u64)eaddr >> 12) & 0xffff) \| (((u64)slb->vsid) << 16);
92	}
93
94	static int kvmppc_mmu_book3s_64_get_pagesize(struct kvmppc_slb *slbe)
95	{
96	return slbe->large ? 24 : 12;
97	}
98
99	static u32 kvmppc_mmu_book3s_64_get_page(struct kvmppc_slb *slbe, gva_t eaddr)
100	{
101	int p = kvmppc_mmu_book3s_64_get_pagesize(slbe);
102	return ((eaddr & 0xfffffff) >> p);
103	}
104
105	static hva_t kvmppc_mmu_book3s_64_get_pteg(
106	struct kvmppc_vcpu_book3s *vcpu_book3s,
107	struct kvmppc_slb *slbe, gva_t eaddr,
108	bool second)
109	{
110	u64 hash, pteg, htabsize;
111	u32 page;
112	hva_t r;
113
114	page = kvmppc_mmu_book3s_64_get_page(slbe, eaddr);
115	htabsize = ((1 << ((vcpu_book3s->sdr1 & 0x1f) + 11)) - 1);
116
117	hash = slbe->vsid ^ page;
118	if (second)
119	hash = ~hash;
120	hash &= ((1ULL << 39ULL) - 1ULL);
121	hash &= htabsize;
122	hash <<= 7ULL;
123
124	pteg = vcpu_book3s->sdr1 & 0xfffffffffffc0000ULL;
125	pteg \|= hash;
126
127	dprintk("MMU: page=0x%x sdr1=0x%llx pteg=0x%llx vsid=0x%llx\n",
128	page, vcpu_book3s->sdr1, pteg, slbe->vsid);
129
130	r = gfn_to_hva(vcpu_book3s->vcpu.kvm, pteg >> PAGE_SHIFT);
131	if (kvm_is_error_hva(r))
132	return r;
133	return r \| (pteg & ~PAGE_MASK);
134	}
135
136	static u64 kvmppc_mmu_book3s_64_get_avpn(struct kvmppc_slb *slbe, gva_t eaddr)
137	{
138	int p = kvmppc_mmu_book3s_64_get_pagesize(slbe);
139	u64 avpn;
140
141	avpn = kvmppc_mmu_book3s_64_get_page(slbe, eaddr);
142	avpn \|= slbe->vsid << (28 - p);
143
144	if (p < 24)
145	avpn >>= ((80 - p) - 56) - 8;
146	else
147	avpn <<= 8;
148
149	return avpn;
150	}
151
152	static int kvmppc_mmu_book3s_64_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
153	struct kvmppc_pte *gpte, bool data)
154	{
155	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
156	struct kvmppc_slb *slbe;
157	hva_t ptegp;
158	u64 pteg[16];
159	u64 avpn = 0;
160	int i;
161	u8 key = 0;
162	bool found = false;
163	bool perm_err = false;
164	int second = 0;
165
166	slbe = kvmppc_mmu_book3s_64_find_slbe(vcpu_book3s, eaddr);
167	if (!slbe)
168	goto no_seg_found;
169
170	do_second:
171	ptegp = kvmppc_mmu_book3s_64_get_pteg(vcpu_book3s, slbe, eaddr, second);
172	if (kvm_is_error_hva(ptegp))
173	goto no_page_found;
174
175	avpn = kvmppc_mmu_book3s_64_get_avpn(slbe, eaddr);
176
177	if(copy_from_user(pteg, (void __user *)ptegp, sizeof(pteg))) {
178	printk(KERN_ERR "KVM can't copy data from 0x%lx!\n", ptegp);
179	goto no_page_found;
180	}
181
182	if ((vcpu->arch.msr & MSR_PR) && slbe->Kp)
183	key = 4;
184	else if (!(vcpu->arch.msr & MSR_PR) && slbe->Ks)
185	key = 4;
186
187	for (i=0; i<16; i+=2) {
188	u64 v = pteg[i];
189	u64 r = pteg[i+1];
190
191	/* Valid check */
192	if (!(v & HPTE_V_VALID))
193	continue;
194	/* Hash check */
195	if ((v & HPTE_V_SECONDARY) != second)
196	continue;
197
198	/* AVPN compare */
199	if (HPTE_V_AVPN_VAL(avpn) == HPTE_V_AVPN_VAL(v)) {
200	u8 pp = (r & HPTE_R_PP) \| key;
201	int eaddr_mask = 0xFFF;
202
203	gpte->eaddr = eaddr;
204	gpte->vpage = kvmppc_mmu_book3s_64_ea_to_vp(vcpu,
205	eaddr,
206	data);
207	if (slbe->large)
208	eaddr_mask = 0xFFFFFF;
209	gpte->raddr = (r & HPTE_R_RPN) \| (eaddr & eaddr_mask);
210	gpte->may_execute = ((r & HPTE_R_N) ? false : true);
211	gpte->may_read = false;
212	gpte->may_write = false;
213
214	switch (pp) {
215	case 0:
216	case 1:
217	case 2:
218	case 6:
219	gpte->may_write = true;
220	/* fall through */
221	case 3:
222	case 5:
223	case 7:
224	gpte->may_read = true;
225	break;
226	}
227
228	if (!gpte->may_read) {
229	perm_err = true;
230	continue;
231	}
232
233	dprintk("KVM MMU: Translated 0x%lx [0x%llx] -> 0x%llx "
234	"-> 0x%llx\n",
235	eaddr, avpn, gpte->vpage, gpte->raddr);
236	found = true;
237	break;
238	}
239	}
240
241	/* Update PTE R and C bits, so the guest's swapper knows we used the
242	* page */
243	if (found) {
244	u32 oldr = pteg[i+1];
245
246	if (gpte->may_read) {
247	/* Set the accessed flag */
248	pteg[i+1] \|= HPTE_R_R;
249	}
250	if (gpte->may_write) {
251	/* Set the dirty flag */
252	pteg[i+1] \|= HPTE_R_C;
253	} else {
254	dprintk("KVM: Mapping read-only page!\n");
255	}
256
257	/* Write back into the PTEG */
258	if (pteg[i+1] != oldr)
259	copy_to_user((void __user *)ptegp, pteg, sizeof(pteg));
260
261	return 0;
262	} else {
263	dprintk("KVM MMU: No PTE found (ea=0x%lx sdr1=0x%llx "
264	"ptegp=0x%lx)\n",
265	eaddr, to_book3s(vcpu)->sdr1, ptegp);
266	for (i = 0; i < 16; i += 2)
267	dprintk(" %02d: 0x%llx - 0x%llx (0x%llx)\n",
268	i, pteg[i], pteg[i+1], avpn);
269
270	if (!second) {
271	second = HPTE_V_SECONDARY;
272	goto do_second;
273	}
274	}
275
276
277	no_page_found:
278
279
280	if (perm_err)
281	return -EPERM;
282
283	return -ENOENT;
284
285	no_seg_found:
286
287	dprintk("KVM MMU: Trigger segment fault\n");
288	return -EINVAL;
289	}
290
291	static void kvmppc_mmu_book3s_64_slbmte(struct kvm_vcpu *vcpu, u64 rs, u64 rb)
292	{
293	struct kvmppc_vcpu_book3s *vcpu_book3s;
294	u64 esid, esid_1t;
295	int slb_nr;
296	struct kvmppc_slb *slbe;
297
298	dprintk("KVM MMU: slbmte(0x%llx, 0x%llx)\n", rs, rb);
299
300	vcpu_book3s = to_book3s(vcpu);
301
302	esid = GET_ESID(rb);
303	esid_1t = GET_ESID_1T(rb);
304	slb_nr = rb & 0xfff;
305
306	if (slb_nr > vcpu_book3s->slb_nr)
307	return;
308
309	slbe = &vcpu_book3s->slb[slb_nr];
310
311	slbe->large = (rs & SLB_VSID_L) ? 1 : 0;
312	slbe->esid = slbe->large ? esid_1t : esid;
313	slbe->vsid = rs >> 12;
314	slbe->valid = (rb & SLB_ESID_V) ? 1 : 0;
315	slbe->Ks = (rs & SLB_VSID_KS) ? 1 : 0;
316	slbe->Kp = (rs & SLB_VSID_KP) ? 1 : 0;
317	slbe->nx = (rs & SLB_VSID_N) ? 1 : 0;
318	slbe->class = (rs & SLB_VSID_C) ? 1 : 0;
319
320	slbe->orige = rb & (ESID_MASK \| SLB_ESID_V);
321	slbe->origv = rs;
322
323	/* Map the new segment */
324	kvmppc_mmu_map_segment(vcpu, esid << SID_SHIFT);
325	}
326
327	static u64 kvmppc_mmu_book3s_64_slbmfee(struct kvm_vcpu *vcpu, u64 slb_nr)
328	{
329	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
330	struct kvmppc_slb *slbe;
331
332	if (slb_nr > vcpu_book3s->slb_nr)
333	return 0;
334
335	slbe = &vcpu_book3s->slb[slb_nr];
336
337	return slbe->orige;
338	}
339
340	static u64 kvmppc_mmu_book3s_64_slbmfev(struct kvm_vcpu *vcpu, u64 slb_nr)
341	{
342	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
343	struct kvmppc_slb *slbe;
344
345	if (slb_nr > vcpu_book3s->slb_nr)
346	return 0;
347
348	slbe = &vcpu_book3s->slb[slb_nr];
349
350	return slbe->origv;
351	}
352
353	static void kvmppc_mmu_book3s_64_slbie(struct kvm_vcpu *vcpu, u64 ea)
354	{
355	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
356	struct kvmppc_slb *slbe;
357
358	dprintk("KVM MMU: slbie(0x%llx)\n", ea);
359
360	slbe = kvmppc_mmu_book3s_64_find_slbe(vcpu_book3s, ea);
361
362	if (!slbe)
363	return;
364
365	dprintk("KVM MMU: slbie(0x%llx, 0x%llx)\n", ea, slbe->esid);
366
367	slbe->valid = false;
368
369	kvmppc_mmu_map_segment(vcpu, ea);
370	}
371
372	static void kvmppc_mmu_book3s_64_slbia(struct kvm_vcpu *vcpu)
373	{
374	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
375	int i;
376
377	dprintk("KVM MMU: slbia()\n");
378
379	for (i = 1; i < vcpu_book3s->slb_nr; i++)
380	vcpu_book3s->slb[i].valid = false;
381
382	if (vcpu->arch.msr & MSR_IR) {
383	kvmppc_mmu_flush_segments(vcpu);
384	kvmppc_mmu_map_segment(vcpu, vcpu->arch.pc);
385	}
386	}
387
388	static void kvmppc_mmu_book3s_64_mtsrin(struct kvm_vcpu *vcpu, u32 srnum,
389	ulong value)
390	{
391	u64 rb = 0, rs = 0;
392
393	/* ESID = srnum */
394	rb \|= (srnum & 0xf) << 28;
395	/* Set the valid bit */
396	rb \|= 1 << 27;
397	/* Index = ESID */
398	rb \|= srnum;
399
400	/* VSID = VSID */
401	rs \|= (value & 0xfffffff) << 12;
402	/* flags = flags */
403	rs \|= ((value >> 27) & 0xf) << 9;
404
405	kvmppc_mmu_book3s_64_slbmte(vcpu, rs, rb);
406	}
407
408	static void kvmppc_mmu_book3s_64_tlbie(struct kvm_vcpu *vcpu, ulong va,
409	bool large)
410	{
411	u64 mask = 0xFFFFFFFFFULL;
412
413	dprintk("KVM MMU: tlbie(0x%lx)\n", va);
414
415	if (large)
416	mask = 0xFFFFFF000ULL;
417	kvmppc_mmu_pte_vflush(vcpu, va >> 12, mask);
418	}
419
420	static int kvmppc_mmu_book3s_64_esid_to_vsid(struct kvm_vcpu *vcpu, u64 esid,
421	u64 *vsid)
422	{
423	switch (vcpu->arch.msr & (MSR_DR\|MSR_IR)) {
424	case 0:
425	*vsid = (VSID_REAL >> 16) \| esid;
426	break;
427	case MSR_IR:
428	*vsid = (VSID_REAL_IR >> 16) \| esid;
429	break;
430	case MSR_DR:
431	*vsid = (VSID_REAL_DR >> 16) \| esid;
432	break;
433	case MSR_DR\|MSR_IR:
434	{
435	ulong ea;
436	struct kvmppc_slb *slb;
437	ea = esid << SID_SHIFT;
438	slb = kvmppc_mmu_book3s_64_find_slbe(to_book3s(vcpu), ea);
439	if (slb)
440	*vsid = slb->vsid;
441	else
442	return -ENOENT;
443
444	break;
445	}
446	default:
447	BUG();
448	break;
449	}
450
451	return 0;
452	}
453
454	static bool kvmppc_mmu_book3s_64_is_dcbz32(struct kvm_vcpu *vcpu)
455	{
456	return (to_book3s(vcpu)->hid[5] & 0x80);
457	}
458
459	void kvmppc_mmu_book3s_64_init(struct kvm_vcpu *vcpu)
460	{
461	struct kvmppc_mmu *mmu = &vcpu->arch.mmu;
462
463	mmu->mfsrin = NULL;
464	mmu->mtsrin = kvmppc_mmu_book3s_64_mtsrin;
465	mmu->slbmte = kvmppc_mmu_book3s_64_slbmte;
466	mmu->slbmfee = kvmppc_mmu_book3s_64_slbmfee;
467	mmu->slbmfev = kvmppc_mmu_book3s_64_slbmfev;
468	mmu->slbie = kvmppc_mmu_book3s_64_slbie;
469	mmu->slbia = kvmppc_mmu_book3s_64_slbia;
470	mmu->xlate = kvmppc_mmu_book3s_64_xlate;
471	mmu->reset_msr = kvmppc_mmu_book3s_64_reset_msr;
472	mmu->tlbie = kvmppc_mmu_book3s_64_tlbie;
473	mmu->esid_to_vsid = kvmppc_mmu_book3s_64_esid_to_vsid;
474	mmu->ea_to_vp = kvmppc_mmu_book3s_64_ea_to_vp;
475	mmu->is_dcbz32 = kvmppc_mmu_book3s_64_is_dcbz32;
476	}