[deliverable/linux.git] / arch / powerpc / kvm / book3s_32_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 */
/* #define DEBUG_MMU_PTE */
/* #define DEBUG_MMU_PTE_IP 0xfff14c40 */

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

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

#define PTEG_FLAG_ACCESSED	0x00000100
#define PTEG_FLAG_DIRTY		0x00000080
#ifndef SID_SHIFT
#define SID_SHIFT		28
#endif

static inline bool check_debug_ip(struct kvm_vcpu *vcpu)
{
#ifdef DEBUG_MMU_PTE_IP
	return vcpu->arch.pc == DEBUG_MMU_PTE_IP;
#else
	return true;
#endif
}

static inline u32 sr_vsid(u32 sr_raw)
{
	return sr_raw & 0x0fffffff;
}

static inline bool sr_valid(u32 sr_raw)
{
	return (sr_raw & 0x80000000) ? false : true;
}

static inline bool sr_ks(u32 sr_raw)
{
	return (sr_raw & 0x40000000) ? true: false;
}

static inline bool sr_kp(u32 sr_raw)
{
	return (sr_raw & 0x20000000) ? true: false;
}

static inline bool sr_nx(u32 sr_raw)
{
	return (sr_raw & 0x10000000) ? true: false;
}

static int kvmppc_mmu_book3s_32_xlate_bat(struct kvm_vcpu *vcpu, gva_t eaddr,
					  struct kvmppc_pte *pte, bool data);
static int kvmppc_mmu_book3s_32_esid_to_vsid(struct kvm_vcpu *vcpu, ulong esid,
					     u64 *vsid);

static u32 find_sr(struct kvm_vcpu *vcpu, gva_t eaddr)
{
	return vcpu->arch.shared->sr[(eaddr >> 28) & 0xf];
}

static u64 kvmppc_mmu_book3s_32_ea_to_vp(struct kvm_vcpu *vcpu, gva_t eaddr,
					 bool data)
{
	u64 vsid;
	struct kvmppc_pte pte;

	if (!kvmppc_mmu_book3s_32_xlate_bat(vcpu, eaddr, &pte, data))
		return pte.vpage;

	kvmppc_mmu_book3s_32_esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
	return (((u64)eaddr >> 12) & 0xffff) | (vsid << 16);
}

static void kvmppc_mmu_book3s_32_reset_msr(struct kvm_vcpu *vcpu)
{
	kvmppc_set_msr(vcpu, 0);
}

static hva_t kvmppc_mmu_book3s_32_get_pteg(struct kvmppc_vcpu_book3s *vcpu_book3s,
				      u32 sre, gva_t eaddr,
				      bool primary)
{
	u32 page, hash, pteg, htabmask;
	hva_t r;

	page = (eaddr & 0x0FFFFFFF) >> 12;
	htabmask = ((vcpu_book3s->sdr1 & 0x1FF) << 16) | 0xFFC0;

	hash = ((sr_vsid(sre) ^ page) << 6);
	if (!primary)
		hash = ~hash;
	hash &= htabmask;

	pteg = (vcpu_book3s->sdr1 & 0xffff0000) | hash;

	dprintk("MMU: pc=0x%lx eaddr=0x%lx sdr1=0x%llx pteg=0x%x vsid=0x%x\n",
		kvmppc_get_pc(&vcpu_book3s->vcpu), eaddr, vcpu_book3s->sdr1, pteg,
		sr_vsid(sre));

	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 u32 kvmppc_mmu_book3s_32_get_ptem(u32 sre, gva_t eaddr, bool primary)
{
	return ((eaddr & 0x0fffffff) >> 22) | (sr_vsid(sre) << 7) |
	       (primary ? 0 : 0x40) | 0x80000000;
}

static int kvmppc_mmu_book3s_32_xlate_bat(struct kvm_vcpu *vcpu, gva_t eaddr,
					  struct kvmppc_pte *pte, bool data)
{
	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
	struct kvmppc_bat *bat;
	int i;

	for (i = 0; i < 8; i++) {
		if (data)
			bat = &vcpu_book3s->dbat[i];
		else
			bat = &vcpu_book3s->ibat[i];

		if (vcpu->arch.shared->msr & MSR_PR) {
			if (!bat->vp)
				continue;
		} else {
			if (!bat->vs)
				continue;
		}

		if (check_debug_ip(vcpu))
		{
			dprintk_pte("%cBAT %02d: 0x%lx - 0x%x (0x%x)\n",
				    data ? 'd' : 'i', i, eaddr, bat->bepi,
				    bat->bepi_mask);
		}
		if ((eaddr & bat->bepi_mask) == bat->bepi) {
			u64 vsid;
			kvmppc_mmu_book3s_32_esid_to_vsid(vcpu,
				eaddr >> SID_SHIFT, &vsid);
			vsid <<= 16;
			pte->vpage = (((u64)eaddr >> 12) & 0xffff) | vsid;

			pte->raddr = bat->brpn | (eaddr & ~bat->bepi_mask);
			pte->may_read = bat->pp;
			pte->may_write = bat->pp > 1;
			pte->may_execute = true;
			if (!pte->may_read) {
				printk(KERN_INFO "BAT is not readable!\n");
				continue;
			}
			if (!pte->may_write) {
				/* let's treat r/o BATs as not-readable for now */
				dprintk_pte("BAT is read-only!\n");
				continue;
			}

			return 0;
		}
	}

	return -ENOENT;
}

static int kvmppc_mmu_book3s_32_xlate_pte(struct kvm_vcpu *vcpu, gva_t eaddr,
				     struct kvmppc_pte *pte, bool data,
				     bool primary)
{
	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
	u32 sre;
	hva_t ptegp;
	u32 pteg[16];
	u32 ptem = 0;
	int i;
	int found = 0;

	sre = find_sr(vcpu, eaddr);

	dprintk_pte("SR 0x%lx: vsid=0x%x, raw=0x%x\n", eaddr >> 28,
		    sr_vsid(sre), sre);

	pte->vpage = kvmppc_mmu_book3s_32_ea_to_vp(vcpu, eaddr, data);

	ptegp = kvmppc_mmu_book3s_32_get_pteg(vcpu_book3s, sre, eaddr, primary);
	if (kvm_is_error_hva(ptegp)) {
		printk(KERN_INFO "KVM: Invalid PTEG!\n");
		goto no_page_found;
	}

	ptem = kvmppc_mmu_book3s_32_get_ptem(sre, eaddr, primary);

	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;
	}

	for (i=0; i<16; i+=2) {
		if (ptem == pteg[i]) {
			u8 pp;

			pte->raddr = (pteg[i+1] & ~(0xFFFULL)) | (eaddr & 0xFFF);
			pp = pteg[i+1] & 3;

			if ((sr_kp(sre) &&  (vcpu->arch.shared->msr & MSR_PR)) ||
			    (sr_ks(sre) && !(vcpu->arch.shared->msr & MSR_PR)))
				pp |= 4;

			pte->may_write = false;
			pte->may_read = false;
			pte->may_execute = true;
			switch (pp) {
				case 0:
				case 1:
				case 2:
				case 6:
					pte->may_write = true;
				case 3:
				case 5:
				case 7:
					pte->may_read = true;
					break;
			}

			if ( !pte->may_read )
				continue;

			dprintk_pte("MMU: Found PTE -> %x %x - %x\n",
				    pteg[i], pteg[i+1], pp);
			found = 1;
			break;
		}
	}

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

		if (pte->may_read)
			pteg[i+1] |= PTEG_FLAG_ACCESSED;
		if (pte->may_write)
			pteg[i+1] |= PTEG_FLAG_DIRTY;
		else
			dprintk_pte("KVM: Mapping read-only page!\n");

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

		return 0;
	}

no_page_found:

	if (check_debug_ip(vcpu)) {
		dprintk_pte("KVM MMU: No PTE found (sdr1=0x%llx ptegp=0x%lx)\n",
			    to_book3s(vcpu)->sdr1, ptegp);
		for (i=0; i<16; i+=2) {
			dprintk_pte("   %02d: 0x%x - 0x%x (0x%x)\n",
				    i, pteg[i], pteg[i+1], ptem);
		}
	}

	return -ENOENT;
}

static int kvmppc_mmu_book3s_32_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
				      struct kvmppc_pte *pte, bool data)
{
	int r;
	ulong mp_ea = vcpu->arch.magic_page_ea;

	pte->eaddr = eaddr;

	/* Magic page override */
	if (unlikely(mp_ea) &&
	    unlikely((eaddr & ~0xfffULL) == (mp_ea & ~0xfffULL)) &&
	    !(vcpu->arch.shared->msr & MSR_PR)) {
		pte->vpage = kvmppc_mmu_book3s_32_ea_to_vp(vcpu, eaddr, data);
		pte->raddr = vcpu->arch.magic_page_pa | (pte->raddr & 0xfff);
		pte->raddr &= KVM_PAM;
		pte->may_execute = true;
		pte->may_read = true;
		pte->may_write = true;

		return 0;
	}

	r = kvmppc_mmu_book3s_32_xlate_bat(vcpu, eaddr, pte, data);
	if (r < 0)
	       r = kvmppc_mmu_book3s_32_xlate_pte(vcpu, eaddr, pte, data, true);
	if (r < 0)
	       r = kvmppc_mmu_book3s_32_xlate_pte(vcpu, eaddr, pte, data, false);

	return r;
}


static u32 kvmppc_mmu_book3s_32_mfsrin(struct kvm_vcpu *vcpu, u32 srnum)
{
	return vcpu->arch.shared->sr[srnum];
}

static void kvmppc_mmu_book3s_32_mtsrin(struct kvm_vcpu *vcpu, u32 srnum,
					ulong value)
{
	vcpu->arch.shared->sr[srnum] = value;
	kvmppc_mmu_map_segment(vcpu, srnum << SID_SHIFT);
}

static void kvmppc_mmu_book3s_32_tlbie(struct kvm_vcpu *vcpu, ulong ea, bool large)
{
	kvmppc_mmu_pte_flush(vcpu, ea, 0x0FFFF000);
}

static int kvmppc_mmu_book3s_32_esid_to_vsid(struct kvm_vcpu *vcpu, ulong esid,
					     u64 *vsid)
{
	ulong ea = esid << SID_SHIFT;
	u32 sr;
	u64 gvsid = esid;

	if (vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) {
		sr = find_sr(vcpu, ea);
		if (sr_valid(sr))
			gvsid = sr_vsid(sr);
	}

	/* In case we only have one of MSR_IR or MSR_DR set, let's put
	   that in the real-mode context (and hope RM doesn't access
	   high memory) */
	switch (vcpu->arch.shared->msr & (MSR_DR|MSR_IR)) {
	case 0:
		*vsid = VSID_REAL | esid;
		break;
	case MSR_IR:
		*vsid = VSID_REAL_IR | gvsid;
		break;
	case MSR_DR:
		*vsid = VSID_REAL_DR | gvsid;
		break;
	case MSR_DR|MSR_IR:
		if (sr_valid(sr))
			*vsid = sr_vsid(sr);
		else
			*vsid = VSID_BAT | gvsid;
		break;
	default:
		BUG();
	}

	if (vcpu->arch.shared->msr & MSR_PR)
		*vsid |= VSID_PR;

	return 0;
}

static bool kvmppc_mmu_book3s_32_is_dcbz32(struct kvm_vcpu *vcpu)
{
	return true;
}


void kvmppc_mmu_book3s_32_init(struct kvm_vcpu *vcpu)
{
	struct kvmppc_mmu *mmu = &vcpu->arch.mmu;

	mmu->mtsrin = kvmppc_mmu_book3s_32_mtsrin;
	mmu->mfsrin = kvmppc_mmu_book3s_32_mfsrin;
	mmu->xlate = kvmppc_mmu_book3s_32_xlate;
	mmu->reset_msr = kvmppc_mmu_book3s_32_reset_msr;
	mmu->tlbie = kvmppc_mmu_book3s_32_tlbie;
	mmu->esid_to_vsid = kvmppc_mmu_book3s_32_esid_to_vsid;
	mmu->ea_to_vp = kvmppc_mmu_book3s_32_ea_to_vp;
	mmu->is_dcbz32 = kvmppc_mmu_book3s_32_is_dcbz32;

	mmu->slbmte = NULL;
	mmu->slbmfee = NULL;
	mmu->slbmfev = NULL;
	mmu->slbie = NULL;
	mmu->slbia = NULL;
}
Commit	Line	Data
01235180 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	/* #define DEBUG_MMU_PTE */
	32	/* #define DEBUG_MMU_PTE_IP 0xfff14c40 */
	33
	34	#ifdef DEBUG_MMU
	35	#define dprintk(X...) printk(KERN_INFO X)
	36	#else
	37	#define dprintk(X...) do { } while(0)
	38	#endif
	39
e425a6de	40	#ifdef DEBUG_MMU_PTE
01235180 AG	41	#define dprintk_pte(X...) printk(KERN_INFO X)
	42	#else
	43	#define dprintk_pte(X...) do { } while(0)
	44	#endif
	45
	46	#define PTEG_FLAG_ACCESSED 0x00000100
	47	#define PTEG_FLAG_DIRTY 0x00000080
07b0907d AG	48	#ifndef SID_SHIFT
	49	#define SID_SHIFT 28
	50	#endif
01235180 AG	51
	52	static inline bool check_debug_ip(struct kvm_vcpu *vcpu)
	53	{
	54	#ifdef DEBUG_MMU_PTE_IP
	55	return vcpu->arch.pc == DEBUG_MMU_PTE_IP;
	56	#else
	57	return true;
	58	#endif
	59	}
	60
8e865178 AG	61	static inline u32 sr_vsid(u32 sr_raw)
	62	{
	63	return sr_raw & 0x0fffffff;
	64	}
	65
	66	static inline bool sr_valid(u32 sr_raw)
	67	{
	68	return (sr_raw & 0x80000000) ? false : true;
	69	}
	70
	71	static inline bool sr_ks(u32 sr_raw)
	72	{
	73	return (sr_raw & 0x40000000) ? true: false;
	74	}
	75
	76	static inline bool sr_kp(u32 sr_raw)
	77	{
	78	return (sr_raw & 0x20000000) ? true: false;
	79	}
	80
	81	static inline bool sr_nx(u32 sr_raw)
	82	{
	83	return (sr_raw & 0x10000000) ? true: false;
	84	}
	85
01235180 AG	86	static int kvmppc_mmu_book3s_32_xlate_bat(struct kvm_vcpu *vcpu, gva_t eaddr,
01235180 AG	87	struct kvmppc_pte *pte, bool data);
af7b4d10	88	static int kvmppc_mmu_book3s_32_esid_to_vsid(struct kvm_vcpu *vcpu, ulong esid,
4b389ca2	89	u64 *vsid);
01235180	90
df1bfa25	91	static u32 find_sr(struct kvm_vcpu *vcpu, gva_t eaddr)
01235180	92	{
df1bfa25	93	return vcpu->arch.shared->sr[(eaddr >> 28) & 0xf];
01235180 AG	94	}
	95
	96	static u64 kvmppc_mmu_book3s_32_ea_to_vp(struct kvm_vcpu *vcpu, gva_t eaddr,
	97	bool data)
	98	{
4b389ca2	99	u64 vsid;
01235180 AG	100	struct kvmppc_pte pte;
	101
	102	if (!kvmppc_mmu_book3s_32_xlate_bat(vcpu, eaddr, &pte, data))
	103	return pte.vpage;
	104
4b389ca2 AG	105	kvmppc_mmu_book3s_32_esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
4b389ca2 AG	106	return (((u64)eaddr >> 12) & 0xffff) \| (vsid << 16);
01235180 AG	107	}
	108
	109	static void kvmppc_mmu_book3s_32_reset_msr(struct kvm_vcpu *vcpu)
	110	{
	111	kvmppc_set_msr(vcpu, 0);
	112	}
	113
	114	static hva_t kvmppc_mmu_book3s_32_get_pteg(struct kvmppc_vcpu_book3s *vcpu_book3s,
8e865178	115	u32 sre, gva_t eaddr,
01235180 AG	116	bool primary)
	117	{
	118	u32 page, hash, pteg, htabmask;
	119	hva_t r;
	120
	121	page = (eaddr & 0x0FFFFFFF) >> 12;
	122	htabmask = ((vcpu_book3s->sdr1 & 0x1FF) << 16) \| 0xFFC0;
	123
8e865178	124	hash = ((sr_vsid(sre) ^ page) << 6);
01235180 AG	125	if (!primary)
	126	hash = ~hash;
	127	hash &= htabmask;
	128
	129	pteg = (vcpu_book3s->sdr1 & 0xffff0000) \| hash;
	130
	131	dprintk("MMU: pc=0x%lx eaddr=0x%lx sdr1=0x%llx pteg=0x%x vsid=0x%x\n",
53021042	132	kvmppc_get_pc(&vcpu_book3s->vcpu), eaddr, vcpu_book3s->sdr1, pteg,
8e865178	133	sr_vsid(sre));
01235180 AG	134
	135	r = gfn_to_hva(vcpu_book3s->vcpu.kvm, pteg >> PAGE_SHIFT);
	136	if (kvm_is_error_hva(r))
	137	return r;
	138	return r \| (pteg & ~PAGE_MASK);
	139	}
	140
8e865178	141	static u32 kvmppc_mmu_book3s_32_get_ptem(u32 sre, gva_t eaddr, bool primary)
01235180	142	{
8e865178	143	return ((eaddr & 0x0fffffff) >> 22) \| (sr_vsid(sre) << 7) \|
01235180 AG	144	(primary ? 0 : 0x40) \| 0x80000000;
	145	}
	146
	147	static int kvmppc_mmu_book3s_32_xlate_bat(struct kvm_vcpu *vcpu, gva_t eaddr,
	148	struct kvmppc_pte *pte, bool data)
	149	{
	150	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
	151	struct kvmppc_bat *bat;
	152	int i;
	153
	154	for (i = 0; i < 8; i++) {
	155	if (data)
	156	bat = &vcpu_book3s->dbat[i];
	157	else
	158	bat = &vcpu_book3s->ibat[i];
	159
666e7252	160	if (vcpu->arch.shared->msr & MSR_PR) {
01235180 AG	161	if (!bat->vp)
	162	continue;
	163	} else {
	164	if (!bat->vs)
	165	continue;
	166	}
	167
	168	if (check_debug_ip(vcpu))
	169	{
	170	dprintk_pte("%cBAT %02d: 0x%lx - 0x%x (0x%x)\n",
	171	data ? 'd' : 'i', i, eaddr, bat->bepi,
	172	bat->bepi_mask);
	173	}
	174	if ((eaddr & bat->bepi_mask) == bat->bepi) {
4b389ca2 AG	175	u64 vsid;
	176	kvmppc_mmu_book3s_32_esid_to_vsid(vcpu,
	177	eaddr >> SID_SHIFT, &vsid);
	178	vsid <<= 16;
	179	pte->vpage = (((u64)eaddr >> 12) & 0xffff) \| vsid;
	180
01235180	181	pte->raddr = bat->brpn \| (eaddr & ~bat->bepi_mask);
01235180 AG	182	pte->may_read = bat->pp;
	183	pte->may_write = bat->pp > 1;
	184	pte->may_execute = true;
	185	if (!pte->may_read) {
	186	printk(KERN_INFO "BAT is not readable!\n");
	187	continue;
	188	}
	189	if (!pte->may_write) {
	190	/* let's treat r/o BATs as not-readable for now */
	191	dprintk_pte("BAT is read-only!\n");
	192	continue;
	193	}
	194
	195	return 0;
	196	}
	197	}
	198
	199	return -ENOENT;
	200	}
	201
	202	static int kvmppc_mmu_book3s_32_xlate_pte(struct kvm_vcpu *vcpu, gva_t eaddr,
	203	struct kvmppc_pte *pte, bool data,
	204	bool primary)
	205	{
	206	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
8e865178	207	u32 sre;
01235180 AG	208	hva_t ptegp;
01235180 AG	209	u32 pteg[16];
af7b4d10	210	u32 ptem = 0;
01235180 AG	211	int i;
	212	int found = 0;
	213
df1bfa25	214	sre = find_sr(vcpu, eaddr);
01235180 AG	215
01235180 AG	216	dprintk_pte("SR 0x%lx: vsid=0x%x, raw=0x%x\n", eaddr >> 28,
8e865178	217	sr_vsid(sre), sre);
01235180 AG	218
	219	pte->vpage = kvmppc_mmu_book3s_32_ea_to_vp(vcpu, eaddr, data);
	220
	221	ptegp = kvmppc_mmu_book3s_32_get_pteg(vcpu_book3s, sre, eaddr, primary);
	222	if (kvm_is_error_hva(ptegp)) {
	223	printk(KERN_INFO "KVM: Invalid PTEG!\n");
	224	goto no_page_found;
	225	}
	226
	227	ptem = kvmppc_mmu_book3s_32_get_ptem(sre, eaddr, primary);
	228
	229	if(copy_from_user(pteg, (void __user *)ptegp, sizeof(pteg))) {
	230	printk(KERN_ERR "KVM: Can't copy data from 0x%lx!\n", ptegp);
	231	goto no_page_found;
	232	}
	233
	234	for (i=0; i<16; i+=2) {
	235	if (ptem == pteg[i]) {
	236	u8 pp;
	237
	238	pte->raddr = (pteg[i+1] & ~(0xFFFULL)) \| (eaddr & 0xFFF);
	239	pp = pteg[i+1] & 3;
	240
8e865178 AG	241	if ((sr_kp(sre) && (vcpu->arch.shared->msr & MSR_PR)) \|\|
8e865178 AG	242	(sr_ks(sre) && !(vcpu->arch.shared->msr & MSR_PR)))
01235180 AG	243	pp \|= 4;
	244
	245	pte->may_write = false;
	246	pte->may_read = false;
	247	pte->may_execute = true;
	248	switch (pp) {
	249	case 0:
	250	case 1:
	251	case 2:
	252	case 6:
	253	pte->may_write = true;
	254	case 3:
	255	case 5:
	256	case 7:
	257	pte->may_read = true;
	258	break;
	259	}
	260
	261	if ( !pte->may_read )
	262	continue;
	263
	264	dprintk_pte("MMU: Found PTE -> %x %x - %x\n",
	265	pteg[i], pteg[i+1], pp);
	266	found = 1;
	267	break;
	268	}
	269	}
	270
	271	/* Update PTE C and A bits, so the guest's swapper knows we used the
	272	page */
	273	if (found) {
	274	u32 oldpte = pteg[i+1];
	275
	276	if (pte->may_read)
	277	pteg[i+1] \|= PTEG_FLAG_ACCESSED;
	278	if (pte->may_write)
	279	pteg[i+1] \|= PTEG_FLAG_DIRTY;
	280	else
	281	dprintk_pte("KVM: Mapping read-only page!\n");
	282
	283	/* Write back into the PTEG */
	284	if (pteg[i+1] != oldpte)
	285	copy_to_user((void __user *)ptegp, pteg, sizeof(pteg));
	286
	287	return 0;
	288	}
	289
	290	no_page_found:
	291
	292	if (check_debug_ip(vcpu)) {
	293	dprintk_pte("KVM MMU: No PTE found (sdr1=0x%llx ptegp=0x%lx)\n",
	294	to_book3s(vcpu)->sdr1, ptegp);
	295	for (i=0; i<16; i+=2) {
53021042	296	dprintk_pte(" %02d: 0x%x - 0x%x (0x%x)\n",
01235180 AG	297	i, pteg[i], pteg[i+1], ptem);
	298	}
	299	}
	300
	301	return -ENOENT;
	302	}
	303
	304	static int kvmppc_mmu_book3s_32_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
	305	struct kvmppc_pte *pte, bool data)
	306	{
	307	int r;
e8508940	308	ulong mp_ea = vcpu->arch.magic_page_ea;
01235180 AG	309
01235180 AG	310	pte->eaddr = eaddr;
e8508940 AG	311
	312	/* Magic page override */
	313	if (unlikely(mp_ea) &&
	314	unlikely((eaddr & ~0xfffULL) == (mp_ea & ~0xfffULL)) &&
	315	!(vcpu->arch.shared->msr & MSR_PR)) {
	316	pte->vpage = kvmppc_mmu_book3s_32_ea_to_vp(vcpu, eaddr, data);
	317	pte->raddr = vcpu->arch.magic_page_pa \| (pte->raddr & 0xfff);
	318	pte->raddr &= KVM_PAM;
	319	pte->may_execute = true;
	320	pte->may_read = true;
	321	pte->may_write = true;
	322
	323	return 0;
	324	}
	325
01235180 AG	326	r = kvmppc_mmu_book3s_32_xlate_bat(vcpu, eaddr, pte, data);
	327	if (r < 0)
	328	r = kvmppc_mmu_book3s_32_xlate_pte(vcpu, eaddr, pte, data, true);
	329	if (r < 0)
	330	r = kvmppc_mmu_book3s_32_xlate_pte(vcpu, eaddr, pte, data, false);
	331
	332	return r;
	333	}
	334
	335
	336	static u32 kvmppc_mmu_book3s_32_mfsrin(struct kvm_vcpu *vcpu, u32 srnum)
	337	{
df1bfa25	338	return vcpu->arch.shared->sr[srnum];
01235180 AG	339	}
	340
	341	static void kvmppc_mmu_book3s_32_mtsrin(struct kvm_vcpu *vcpu, u32 srnum,
	342	ulong value)
	343	{
df1bfa25	344	vcpu->arch.shared->sr[srnum] = value;
01235180 AG	345	kvmppc_mmu_map_segment(vcpu, srnum << SID_SHIFT);
	346	}
	347
	348	static void kvmppc_mmu_book3s_32_tlbie(struct kvm_vcpu *vcpu, ulong ea, bool large)
	349	{
4b389ca2	350	kvmppc_mmu_pte_flush(vcpu, ea, 0x0FFFF000);
01235180 AG	351	}
01235180 AG	352
af7b4d10	353	static int kvmppc_mmu_book3s_32_esid_to_vsid(struct kvm_vcpu *vcpu, ulong esid,
01235180 AG	354	u64 *vsid)
01235180 AG	355	{
f7bc74e1	356	ulong ea = esid << SID_SHIFT;
8e865178	357	u32 sr;
f7bc74e1 AG	358	u64 gvsid = esid;
f7bc74e1 AG	359
666e7252	360	if (vcpu->arch.shared->msr & (MSR_DR\|MSR_IR)) {
df1bfa25	361	sr = find_sr(vcpu, ea);
8e865178 AG	362	if (sr_valid(sr))
8e865178 AG	363	gvsid = sr_vsid(sr);
f7bc74e1 AG	364	}
f7bc74e1 AG	365
01235180 AG	366	/* In case we only have one of MSR_IR or MSR_DR set, let's put
	367	that in the real-mode context (and hope RM doesn't access
	368	high memory) */
666e7252	369	switch (vcpu->arch.shared->msr & (MSR_DR\|MSR_IR)) {
01235180	370	case 0:
f7bc74e1	371	*vsid = VSID_REAL \| esid;
01235180 AG	372	break;
01235180 AG	373	case MSR_IR:
f7bc74e1	374	*vsid = VSID_REAL_IR \| gvsid;
01235180 AG	375	break;
01235180 AG	376	case MSR_DR:
f7bc74e1	377	*vsid = VSID_REAL_DR \| gvsid;
01235180 AG	378	break;
01235180 AG	379	case MSR_DR\|MSR_IR:
8e865178 AG	380	if (sr_valid(sr))
8e865178 AG	381	*vsid = sr_vsid(sr);
4d29bdbf AG	382	else
4d29bdbf AG	383	*vsid = VSID_BAT \| gvsid;
01235180	384	break;
01235180 AG	385	default:
	386	BUG();
	387	}
	388
666e7252	389	if (vcpu->arch.shared->msr & MSR_PR)
4b389ca2 AG	390	*vsid \|= VSID_PR;
4b389ca2 AG	391
01235180 AG	392	return 0;
	393	}
	394
	395	static bool kvmppc_mmu_book3s_32_is_dcbz32(struct kvm_vcpu *vcpu)
	396	{
	397	return true;
	398	}
	399
	400
	401	void kvmppc_mmu_book3s_32_init(struct kvm_vcpu *vcpu)
	402	{
	403	struct kvmppc_mmu *mmu = &vcpu->arch.mmu;
	404
	405	mmu->mtsrin = kvmppc_mmu_book3s_32_mtsrin;
	406	mmu->mfsrin = kvmppc_mmu_book3s_32_mfsrin;
	407	mmu->xlate = kvmppc_mmu_book3s_32_xlate;
	408	mmu->reset_msr = kvmppc_mmu_book3s_32_reset_msr;
	409	mmu->tlbie = kvmppc_mmu_book3s_32_tlbie;
	410	mmu->esid_to_vsid = kvmppc_mmu_book3s_32_esid_to_vsid;
	411	mmu->ea_to_vp = kvmppc_mmu_book3s_32_ea_to_vp;
	412	mmu->is_dcbz32 = kvmppc_mmu_book3s_32_is_dcbz32;
	413
	414	mmu->slbmte = NULL;
	415	mmu->slbmfee = NULL;
	416	mmu->slbmfev = NULL;
	417	mmu->slbie = NULL;
	418	mmu->slbia = NULL;
	419	}