[mirror_ubuntu-jammy-kernel.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 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 struct kvmppc_sr *find_sr(struct kvmppc_vcpu_book3s *vcpu_book3s, gva_t eaddr)
{
	return &vcpu_book3s->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,
				      struct kvmppc_sr *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 = ((sre->vsid ^ 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",
		vcpu_book3s->vcpu.arch.pc, eaddr, vcpu_book3s->sdr1, pteg,
		sre->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 u32 kvmppc_mmu_book3s_32_get_ptem(struct kvmppc_sr *sre, gva_t eaddr,
				    bool primary)
{
	return ((eaddr & 0x0fffffff) >> 22) | (sre->vsid << 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.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);
	struct kvmppc_sr *sre;
	hva_t ptegp;
	u32 pteg[16];
	u32 ptem = 0;
	int i;
	int found = 0;

	sre = find_sr(vcpu_book3s, eaddr);

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

	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 ((sre->Kp &&  (vcpu->arch.msr & MSR_PR)) ||
			    (sre->Ks && !(vcpu->arch.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%llx)\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;

	pte->eaddr = eaddr;
	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 to_book3s(vcpu)->sr[srnum].raw;
}

static void kvmppc_mmu_book3s_32_mtsrin(struct kvm_vcpu *vcpu, u32 srnum,
					ulong value)
{
	struct kvmppc_sr *sre;

	sre = &to_book3s(vcpu)->sr[srnum];

	/* Flush any left-over shadows from the previous SR */

	/* XXX Not necessary? */
	/* kvmppc_mmu_pte_flush(vcpu, ((u64)sre->vsid) << 28, 0xf0000000ULL); */

	/* And then put in the new SR */
	sre->raw = value;
	sre->vsid = (value & 0x0fffffff);
	sre->valid = (value & 0x80000000) ? false : true;
	sre->Ks = (value & 0x40000000) ? true : false;
	sre->Kp = (value & 0x20000000) ? true : false;
	sre->nx = (value & 0x10000000) ? true : false;

	/* Map the new segment */
	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;
	struct kvmppc_sr *sr;
	u64 gvsid = esid;

	if (vcpu->arch.msr & (MSR_DR|MSR_IR)) {
		sr = find_sr(to_book3s(vcpu), ea);
		if (sr->valid)
			gvsid = sr->vsid;
	}

	/* 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.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)
			return -1;

		*vsid = sr->vsid;
		break;
	default:
		BUG();
	}

	if (vcpu->arch.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
	61	static int kvmppc_mmu_book3s_32_xlate_bat(struct kvm_vcpu *vcpu, gva_t eaddr,
	62	struct kvmppc_pte *pte, bool data);
af7b4d10	63	static int kvmppc_mmu_book3s_32_esid_to_vsid(struct kvm_vcpu *vcpu, ulong esid,
4b389ca2	64	u64 *vsid);
01235180 AG	65
	66	static struct kvmppc_sr find_sr(struct kvmppc_vcpu_book3s vcpu_book3s, gva_t eaddr)
	67	{
	68	return &vcpu_book3s->sr[(eaddr >> 28) & 0xf];
	69	}
	70
	71	static u64 kvmppc_mmu_book3s_32_ea_to_vp(struct kvm_vcpu *vcpu, gva_t eaddr,
	72	bool data)
	73	{
4b389ca2	74	u64 vsid;
01235180 AG	75	struct kvmppc_pte pte;
	76
	77	if (!kvmppc_mmu_book3s_32_xlate_bat(vcpu, eaddr, &pte, data))
	78	return pte.vpage;
	79
4b389ca2 AG	80	kvmppc_mmu_book3s_32_esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
4b389ca2 AG	81	return (((u64)eaddr >> 12) & 0xffff) \| (vsid << 16);
01235180 AG	82	}
	83
	84	static void kvmppc_mmu_book3s_32_reset_msr(struct kvm_vcpu *vcpu)
	85	{
	86	kvmppc_set_msr(vcpu, 0);
	87	}
	88
	89	static hva_t kvmppc_mmu_book3s_32_get_pteg(struct kvmppc_vcpu_book3s *vcpu_book3s,
	90	struct kvmppc_sr *sre, gva_t eaddr,
	91	bool primary)
	92	{
	93	u32 page, hash, pteg, htabmask;
	94	hva_t r;
	95
	96	page = (eaddr & 0x0FFFFFFF) >> 12;
	97	htabmask = ((vcpu_book3s->sdr1 & 0x1FF) << 16) \| 0xFFC0;
	98
	99	hash = ((sre->vsid ^ page) << 6);
	100	if (!primary)
	101	hash = ~hash;
	102	hash &= htabmask;
	103
	104	pteg = (vcpu_book3s->sdr1 & 0xffff0000) \| hash;
	105
	106	dprintk("MMU: pc=0x%lx eaddr=0x%lx sdr1=0x%llx pteg=0x%x vsid=0x%x\n",
	107	vcpu_book3s->vcpu.arch.pc, eaddr, vcpu_book3s->sdr1, pteg,
	108	sre->vsid);
	109
	110	r = gfn_to_hva(vcpu_book3s->vcpu.kvm, pteg >> PAGE_SHIFT);
	111	if (kvm_is_error_hva(r))
	112	return r;
	113	return r \| (pteg & ~PAGE_MASK);
	114	}
	115
	116	static u32 kvmppc_mmu_book3s_32_get_ptem(struct kvmppc_sr *sre, gva_t eaddr,
	117	bool primary)
	118	{
	119	return ((eaddr & 0x0fffffff) >> 22) \| (sre->vsid << 7) \|
	120	(primary ? 0 : 0x40) \| 0x80000000;
	121	}
	122
	123	static int kvmppc_mmu_book3s_32_xlate_bat(struct kvm_vcpu *vcpu, gva_t eaddr,
	124	struct kvmppc_pte *pte, bool data)
	125	{
	126	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
	127	struct kvmppc_bat *bat;
	128	int i;
	129
	130	for (i = 0; i < 8; i++) {
	131	if (data)
	132	bat = &vcpu_book3s->dbat[i];
	133	else
	134	bat = &vcpu_book3s->ibat[i];
	135
	136	if (vcpu->arch.msr & MSR_PR) {
	137	if (!bat->vp)
	138	continue;
	139	} else {
	140	if (!bat->vs)
	141	continue;
	142	}
	143
	144	if (check_debug_ip(vcpu))
	145	{
146	dprintk_pte("%cBAT %02d: 0x%lx - 0x%x (0x%x)\n",
147	data ? 'd' : 'i', i, eaddr, bat->bepi,
148	bat->bepi_mask);
149	}
150	if ((eaddr & bat->bepi_mask) == bat->bepi) {
4b389ca2 AG	151	u64 vsid;
	152	kvmppc_mmu_book3s_32_esid_to_vsid(vcpu,
	153	eaddr >> SID_SHIFT, &vsid);
	154	vsid <<= 16;
	155	pte->vpage = (((u64)eaddr >> 12) & 0xffff) \| vsid;
	156
01235180	157	pte->raddr = bat->brpn \| (eaddr & ~bat->bepi_mask);
01235180 AG	158	pte->may_read = bat->pp;
	159	pte->may_write = bat->pp > 1;
	160	pte->may_execute = true;
	161	if (!pte->may_read) {
	162	printk(KERN_INFO "BAT is not readable!\n");
	163	continue;
	164	}
	165	if (!pte->may_write) {
	166	/* let's treat r/o BATs as not-readable for now */
	167	dprintk_pte("BAT is read-only!\n");
	168	continue;
	169	}
	170
	171	return 0;
	172	}
	173	}
	174
	175	return -ENOENT;
	176	}
	177
	178	static int kvmppc_mmu_book3s_32_xlate_pte(struct kvm_vcpu *vcpu, gva_t eaddr,
	179	struct kvmppc_pte *pte, bool data,
	180	bool primary)
	181	{
	182	struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
	183	struct kvmppc_sr *sre;
	184	hva_t ptegp;
	185	u32 pteg[16];
af7b4d10	186	u32 ptem = 0;
01235180 AG	187	int i;
	188	int found = 0;
	189
	190	sre = find_sr(vcpu_book3s, eaddr);
	191
	192	dprintk_pte("SR 0x%lx: vsid=0x%x, raw=0x%x\n", eaddr >> 28,
	193	sre->vsid, sre->raw);
	194
	195	pte->vpage = kvmppc_mmu_book3s_32_ea_to_vp(vcpu, eaddr, data);
	196
	197	ptegp = kvmppc_mmu_book3s_32_get_pteg(vcpu_book3s, sre, eaddr, primary);
	198	if (kvm_is_error_hva(ptegp)) {
	199	printk(KERN_INFO "KVM: Invalid PTEG!\n");
	200	goto no_page_found;
	201	}
	202
	203	ptem = kvmppc_mmu_book3s_32_get_ptem(sre, eaddr, primary);
	204
	205	if(copy_from_user(pteg, (void __user *)ptegp, sizeof(pteg))) {
	206	printk(KERN_ERR "KVM: Can't copy data from 0x%lx!\n", ptegp);
	207	goto no_page_found;
	208	}
	209
	210	for (i=0; i<16; i+=2) {
	211	if (ptem == pteg[i]) {
	212	u8 pp;
	213
	214	pte->raddr = (pteg[i+1] & ~(0xFFFULL)) \| (eaddr & 0xFFF);
	215	pp = pteg[i+1] & 3;
	216
	217	if ((sre->Kp && (vcpu->arch.msr & MSR_PR)) \|\|
	218	(sre->Ks && !(vcpu->arch.msr & MSR_PR)))
	219	pp \|= 4;
	220
	221	pte->may_write = false;
	222	pte->may_read = false;
	223	pte->may_execute = true;
	224	switch (pp) {
	225	case 0:
	226	case 1:
	227	case 2:
	228	case 6:
	229	pte->may_write = true;
	230	case 3:
	231	case 5:
	232	case 7:
	233	pte->may_read = true;
	234	break;
	235	}
	236
	237	if ( !pte->may_read )
	238	continue;
	239
	240	dprintk_pte("MMU: Found PTE -> %x %x - %x\n",
	241	pteg[i], pteg[i+1], pp);
	242	found = 1;
	243	break;
	244	}
	245	}
	246
	247	/* Update PTE C and A bits, so the guest's swapper knows we used the
	248	page */
	249	if (found) {
	250	u32 oldpte = pteg[i+1];
251
252	if (pte->may_read)
253	pteg[i+1] \|= PTEG_FLAG_ACCESSED;
254	if (pte->may_write)
255	pteg[i+1] \|= PTEG_FLAG_DIRTY;
256	else
257	dprintk_pte("KVM: Mapping read-only page!\n");
258
259	/* Write back into the PTEG */
260	if (pteg[i+1] != oldpte)
261	copy_to_user((void __user *)ptegp, pteg, sizeof(pteg));
262
263	return 0;
264	}
265
266	no_page_found:
267
268	if (check_debug_ip(vcpu)) {
269	dprintk_pte("KVM MMU: No PTE found (sdr1=0x%llx ptegp=0x%lx)\n",
270	to_book3s(vcpu)->sdr1, ptegp);
271	for (i=0; i<16; i+=2) {
272	dprintk_pte(" %02d: 0x%x - 0x%x (0x%llx)\n",
273	i, pteg[i], pteg[i+1], ptem);
274	}
275	}
276
277	return -ENOENT;
278	}
279
280	static int kvmppc_mmu_book3s_32_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
281	struct kvmppc_pte *pte, bool data)
282	{
283	int r;
284
285	pte->eaddr = eaddr;
286	r = kvmppc_mmu_book3s_32_xlate_bat(vcpu, eaddr, pte, data);
287	if (r < 0)
288	r = kvmppc_mmu_book3s_32_xlate_pte(vcpu, eaddr, pte, data, true);
289	if (r < 0)
290	r = kvmppc_mmu_book3s_32_xlate_pte(vcpu, eaddr, pte, data, false);
291
292	return r;
293	}
294
295
296	static u32 kvmppc_mmu_book3s_32_mfsrin(struct kvm_vcpu *vcpu, u32 srnum)
297	{
298	return to_book3s(vcpu)->sr[srnum].raw;
299	}
300
301	static void kvmppc_mmu_book3s_32_mtsrin(struct kvm_vcpu *vcpu, u32 srnum,
302	ulong value)
303	{
304	struct kvmppc_sr *sre;
305
306	sre = &to_book3s(vcpu)->sr[srnum];
307
308	/* Flush any left-over shadows from the previous SR */
309
310	/* XXX Not necessary? */
311	/* kvmppc_mmu_pte_flush(vcpu, ((u64)sre->vsid) << 28, 0xf0000000ULL); */
312
313	/* And then put in the new SR */
314	sre->raw = value;
315	sre->vsid = (value & 0x0fffffff);
4b389ca2	316	sre->valid = (value & 0x80000000) ? false : true;
01235180 AG	317	sre->Ks = (value & 0x40000000) ? true : false;
	318	sre->Kp = (value & 0x20000000) ? true : false;
	319	sre->nx = (value & 0x10000000) ? true : false;
	320
	321	/* Map the new segment */
	322	kvmppc_mmu_map_segment(vcpu, srnum << SID_SHIFT);
	323	}
	324
	325	static void kvmppc_mmu_book3s_32_tlbie(struct kvm_vcpu *vcpu, ulong ea, bool large)
	326	{
4b389ca2	327	kvmppc_mmu_pte_flush(vcpu, ea, 0x0FFFF000);
01235180 AG	328	}
01235180 AG	329
af7b4d10	330	static int kvmppc_mmu_book3s_32_esid_to_vsid(struct kvm_vcpu *vcpu, ulong esid,
01235180 AG	331	u64 *vsid)
01235180 AG	332	{
f7bc74e1 AG	333	ulong ea = esid << SID_SHIFT;
	334	struct kvmppc_sr *sr;
	335	u64 gvsid = esid;
	336
	337	if (vcpu->arch.msr & (MSR_DR\|MSR_IR)) {
	338	sr = find_sr(to_book3s(vcpu), ea);
	339	if (sr->valid)
	340	gvsid = sr->vsid;
	341	}
	342
01235180 AG	343	/* In case we only have one of MSR_IR or MSR_DR set, let's put
	344	that in the real-mode context (and hope RM doesn't access
	345	high memory) */
	346	switch (vcpu->arch.msr & (MSR_DR\|MSR_IR)) {
	347	case 0:
f7bc74e1	348	*vsid = VSID_REAL \| esid;
01235180 AG	349	break;
01235180 AG	350	case MSR_IR:
f7bc74e1	351	*vsid = VSID_REAL_IR \| gvsid;
01235180 AG	352	break;
01235180 AG	353	case MSR_DR:
f7bc74e1	354	*vsid = VSID_REAL_DR \| gvsid;
01235180 AG	355	break;
01235180 AG	356	case MSR_DR\|MSR_IR:
4b389ca2 AG	357	if (!sr->valid)
	358	return -1;
	359
	360	*vsid = sr->vsid;
01235180	361	break;
01235180 AG	362	default:
	363	BUG();
	364	}
	365
4b389ca2 AG	366	if (vcpu->arch.msr & MSR_PR)
	367	*vsid \|= VSID_PR;
	368
01235180 AG	369	return 0;
	370	}
	371
	372	static bool kvmppc_mmu_book3s_32_is_dcbz32(struct kvm_vcpu *vcpu)
	373	{
	374	return true;
	375	}
	376
	377
	378	void kvmppc_mmu_book3s_32_init(struct kvm_vcpu *vcpu)
	379	{
	380	struct kvmppc_mmu *mmu = &vcpu->arch.mmu;
	381
	382	mmu->mtsrin = kvmppc_mmu_book3s_32_mtsrin;
	383	mmu->mfsrin = kvmppc_mmu_book3s_32_mfsrin;
	384	mmu->xlate = kvmppc_mmu_book3s_32_xlate;
	385	mmu->reset_msr = kvmppc_mmu_book3s_32_reset_msr;
	386	mmu->tlbie = kvmppc_mmu_book3s_32_tlbie;
	387	mmu->esid_to_vsid = kvmppc_mmu_book3s_32_esid_to_vsid;
	388	mmu->ea_to_vp = kvmppc_mmu_book3s_32_ea_to_vp;
	389	mmu->is_dcbz32 = kvmppc_mmu_book3s_32_is_dcbz32;
	390
	391	mmu->slbmte = NULL;
	392	mmu->slbmfee = NULL;
	393	mmu->slbmfev = NULL;
	394	mmu->slbie = NULL;
	395	mmu->slbia = NULL;
	396	}