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.
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.
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.
15 * Copyright SUSE Linux Products GmbH 2009
17 * Authors: Alexander Graf <agraf@suse.de>
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>
26 #include <asm/tlbflush.h>
27 #include <asm/kvm_ppc.h>
28 #include <asm/kvm_book3s.h>
30 /* #define DEBUG_MMU */
33 #define dprintk(X...) printk(KERN_INFO X)
35 #define dprintk(X...) do { } while(0)
38 static void kvmppc_mmu_book3s_64_reset_msr(struct kvm_vcpu *vcpu)
40 kvmppc_set_msr(vcpu, MSR_SF);
43 static struct kvmppc_slb *kvmppc_mmu_book3s_64_find_slbe(
44 struct kvmppc_vcpu_book3s *vcpu_book3s,
48 u64 esid = GET_ESID(eaddr);
49 u64 esid_1t = GET_ESID_1T(eaddr);
51 for (i = 0; i < vcpu_book3s->slb_nr; i++) {
54 if (!vcpu_book3s->slb[i].valid)
57 if (vcpu_book3s->slb[i].large)
60 if (vcpu_book3s->slb[i].esid == cmp_esid)
61 return &vcpu_book3s->slb[i];
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);
78 static u64 kvmppc_mmu_book3s_64_ea_to_vp(struct kvm_vcpu *vcpu, gva_t eaddr,
81 struct kvmppc_slb *slb;
83 slb = kvmppc_mmu_book3s_64_find_slbe(to_book3s(vcpu), eaddr);
88 return (((u64)eaddr >> 12) & 0xfffffff) |
89 (((u64)slb->vsid) << 28);
91 return (((u64)eaddr >> 12) & 0xffff) | (((u64)slb->vsid) << 16);
94 static int kvmppc_mmu_book3s_64_get_pagesize(struct kvmppc_slb *slbe)
96 return slbe->large ? 24 : 12;
99 static u32 kvmppc_mmu_book3s_64_get_page(struct kvmppc_slb *slbe, gva_t eaddr)
101 int p = kvmppc_mmu_book3s_64_get_pagesize(slbe);
102 return ((eaddr & 0xfffffff) >> p);
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,
110 u64 hash, pteg, htabsize;
114 page = kvmppc_mmu_book3s_64_get_page(slbe, eaddr);
115 htabsize = ((1 << ((vcpu_book3s->sdr1 & 0x1f) + 11)) - 1);
117 hash = slbe->vsid ^ page;
120 hash &= ((1ULL << 39ULL) - 1ULL);
124 pteg = vcpu_book3s->sdr1 & 0xfffffffffffc0000ULL;
127 dprintk("MMU: page=0x%x sdr1=0x%llx pteg=0x%llx vsid=0x%llx\n",
128 page, vcpu_book3s->sdr1, pteg, slbe->vsid);
130 r = gfn_to_hva(vcpu_book3s->vcpu.kvm, pteg >> PAGE_SHIFT);
131 if (kvm_is_error_hva(r))
133 return r | (pteg & ~PAGE_MASK);
136 static u64 kvmppc_mmu_book3s_64_get_avpn(struct kvmppc_slb *slbe, gva_t eaddr)
138 int p = kvmppc_mmu_book3s_64_get_pagesize(slbe);
141 avpn = kvmppc_mmu_book3s_64_get_page(slbe, eaddr);
142 avpn |= slbe->vsid << (28 - p);
145 avpn >>= ((80 - p) - 56) - 8;
152 static int kvmppc_mmu_book3s_64_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
153 struct kvmppc_pte *gpte, bool data)
155 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
156 struct kvmppc_slb *slbe;
163 bool perm_err = false;
166 slbe = kvmppc_mmu_book3s_64_find_slbe(vcpu_book3s, eaddr);
171 ptegp = kvmppc_mmu_book3s_64_get_pteg(vcpu_book3s, slbe, eaddr, second);
172 if (kvm_is_error_hva(ptegp))
175 avpn = kvmppc_mmu_book3s_64_get_avpn(slbe, eaddr);
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);
182 if ((vcpu->arch.msr & MSR_PR) && slbe->Kp)
184 else if (!(vcpu->arch.msr & MSR_PR) && slbe->Ks)
187 for (i=0; i<16; i+=2) {
192 if (!(v & HPTE_V_VALID))
195 if ((v & HPTE_V_SECONDARY) != second)
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;
204 gpte->vpage = kvmppc_mmu_book3s_64_ea_to_vp(vcpu,
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;
219 gpte->may_write = true;
224 gpte->may_read = true;
228 if (!gpte->may_read) {
233 dprintk("KVM MMU: Translated 0x%lx [0x%llx] -> 0x%llx "
235 eaddr, avpn, gpte->vpage, gpte->raddr);
241 /* Update PTE R and C bits, so the guest's swapper knows we used the
244 u32 oldr = pteg[i+1];
246 if (gpte->may_read) {
247 /* Set the accessed flag */
248 pteg[i+1] |= HPTE_R_R;
250 if (gpte->may_write) {
251 /* Set the dirty flag */
252 pteg[i+1] |= HPTE_R_C;
254 dprintk("KVM: Mapping read-only page!\n");
257 /* Write back into the PTEG */
258 if (pteg[i+1] != oldr)
259 copy_to_user((void __user *)ptegp, pteg, sizeof(pteg));
263 dprintk("KVM MMU: No PTE found (ea=0x%lx sdr1=0x%llx "
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);
271 second = HPTE_V_SECONDARY;
287 dprintk("KVM MMU: Trigger segment fault\n");
291 static void kvmppc_mmu_book3s_64_slbmte(struct kvm_vcpu *vcpu, u64 rs, u64 rb)
293 struct kvmppc_vcpu_book3s *vcpu_book3s;
296 struct kvmppc_slb *slbe;
298 dprintk("KVM MMU: slbmte(0x%llx, 0x%llx)\n", rs, rb);
300 vcpu_book3s = to_book3s(vcpu);
303 esid_1t = GET_ESID_1T(rb);
306 if (slb_nr > vcpu_book3s->slb_nr)
309 slbe = &vcpu_book3s->slb[slb_nr];
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;
320 slbe->orige = rb & (ESID_MASK | SLB_ESID_V);
323 /* Map the new segment */
324 kvmppc_mmu_map_segment(vcpu, esid << SID_SHIFT);
327 static u64 kvmppc_mmu_book3s_64_slbmfee(struct kvm_vcpu *vcpu, u64 slb_nr)
329 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
330 struct kvmppc_slb *slbe;
332 if (slb_nr > vcpu_book3s->slb_nr)
335 slbe = &vcpu_book3s->slb[slb_nr];
340 static u64 kvmppc_mmu_book3s_64_slbmfev(struct kvm_vcpu *vcpu, u64 slb_nr)
342 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
343 struct kvmppc_slb *slbe;
345 if (slb_nr > vcpu_book3s->slb_nr)
348 slbe = &vcpu_book3s->slb[slb_nr];
353 static void kvmppc_mmu_book3s_64_slbie(struct kvm_vcpu *vcpu, u64 ea)
355 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
356 struct kvmppc_slb *slbe;
358 dprintk("KVM MMU: slbie(0x%llx)\n", ea);
360 slbe = kvmppc_mmu_book3s_64_find_slbe(vcpu_book3s, ea);
365 dprintk("KVM MMU: slbie(0x%llx, 0x%llx)\n", ea, slbe->esid);
369 kvmppc_mmu_map_segment(vcpu, ea);
372 static void kvmppc_mmu_book3s_64_slbia(struct kvm_vcpu *vcpu)
374 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
377 dprintk("KVM MMU: slbia()\n");
379 for (i = 1; i < vcpu_book3s->slb_nr; i++)
380 vcpu_book3s->slb[i].valid = false;
382 if (vcpu->arch.msr & MSR_IR) {
383 kvmppc_mmu_flush_segments(vcpu);
384 kvmppc_mmu_map_segment(vcpu, vcpu->arch.pc);
388 static void kvmppc_mmu_book3s_64_mtsrin(struct kvm_vcpu *vcpu, u32 srnum,
394 * According to Book3 2.01 mtsrin is implemented as:
396 * The SLB entry specified by (RB)32:35 is loaded from register
399 * SLBE Bit Source SLB Field
401 * 0:31 0x0000_0000 ESID-0:31
402 * 32:35 (RB)32:35 ESID-32:35
404 * 37:61 0x00_0000|| 0b0 VSID-0:24
405 * 62:88 (RS)37:63 VSID-25:51
406 * 89:91 (RS)33:35 Ks Kp N
407 * 92 (RS)36 L ((RS)36 must be 0b0)
411 dprintk("KVM MMU: mtsrin(0x%x, 0x%lx)\n", srnum, value);
414 rb |= (srnum & 0xf) << 28;
415 /* Set the valid bit */
421 rs |= (value & 0xfffffff) << 12;
423 rs |= ((value >> 28) & 0x7) << 9;
425 kvmppc_mmu_book3s_64_slbmte(vcpu, rs, rb);
428 static void kvmppc_mmu_book3s_64_tlbie(struct kvm_vcpu *vcpu, ulong va,
431 u64 mask = 0xFFFFFFFFFULL;
433 dprintk("KVM MMU: tlbie(0x%lx)\n", va);
436 mask = 0xFFFFFF000ULL;
437 kvmppc_mmu_pte_vflush(vcpu, va >> 12, mask);
440 static int kvmppc_mmu_book3s_64_esid_to_vsid(struct kvm_vcpu *vcpu, u64 esid,
443 switch (vcpu->arch.msr & (MSR_DR|MSR_IR)) {
445 *vsid = (VSID_REAL >> 16) | esid;
448 *vsid = (VSID_REAL_IR >> 16) | esid;
451 *vsid = (VSID_REAL_DR >> 16) | esid;
456 struct kvmppc_slb *slb;
457 ea = esid << SID_SHIFT;
458 slb = kvmppc_mmu_book3s_64_find_slbe(to_book3s(vcpu), ea);
474 static bool kvmppc_mmu_book3s_64_is_dcbz32(struct kvm_vcpu *vcpu)
476 return (to_book3s(vcpu)->hid[5] & 0x80);
479 void kvmppc_mmu_book3s_64_init(struct kvm_vcpu *vcpu)
481 struct kvmppc_mmu *mmu = &vcpu->arch.mmu;
484 mmu->mtsrin = kvmppc_mmu_book3s_64_mtsrin;
485 mmu->slbmte = kvmppc_mmu_book3s_64_slbmte;
486 mmu->slbmfee = kvmppc_mmu_book3s_64_slbmfee;
487 mmu->slbmfev = kvmppc_mmu_book3s_64_slbmfev;
488 mmu->slbie = kvmppc_mmu_book3s_64_slbie;
489 mmu->slbia = kvmppc_mmu_book3s_64_slbia;
490 mmu->xlate = kvmppc_mmu_book3s_64_xlate;
491 mmu->reset_msr = kvmppc_mmu_book3s_64_reset_msr;
492 mmu->tlbie = kvmppc_mmu_book3s_64_tlbie;
493 mmu->esid_to_vsid = kvmppc_mmu_book3s_64_esid_to_vsid;
494 mmu->ea_to_vp = kvmppc_mmu_book3s_64_ea_to_vp;
495 mmu->is_dcbz32 = kvmppc_mmu_book3s_64_is_dcbz32;
497 vcpu->arch.hflags |= BOOK3S_HFLAG_SLB;