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 */
31 /* #define DEBUG_MMU_PTE */
32 /* #define DEBUG_MMU_PTE_IP 0xfff14c40 */
35 #define dprintk(X...) printk(KERN_INFO X)
37 #define dprintk(X...) do { } while(0)
41 #define dprintk_pte(X...) printk(KERN_INFO X)
43 #define dprintk_pte(X...) do { } while(0)
46 #define PTEG_FLAG_ACCESSED 0x00000100
47 #define PTEG_FLAG_DIRTY 0x00000080
52 static inline bool check_debug_ip(struct kvm_vcpu *vcpu)
54 #ifdef DEBUG_MMU_PTE_IP
55 return vcpu->arch.pc == DEBUG_MMU_PTE_IP;
61 static int kvmppc_mmu_book3s_32_xlate_bat(struct kvm_vcpu *vcpu, gva_t eaddr,
62 struct kvmppc_pte *pte, bool data);
63 static int kvmppc_mmu_book3s_32_esid_to_vsid(struct kvm_vcpu *vcpu, ulong esid,
66 static struct kvmppc_sr *find_sr(struct kvmppc_vcpu_book3s *vcpu_book3s, gva_t eaddr)
68 return &vcpu_book3s->sr[(eaddr >> 28) & 0xf];
71 static u64 kvmppc_mmu_book3s_32_ea_to_vp(struct kvm_vcpu *vcpu, gva_t eaddr,
75 struct kvmppc_pte pte;
77 if (!kvmppc_mmu_book3s_32_xlate_bat(vcpu, eaddr, &pte, data))
80 kvmppc_mmu_book3s_32_esid_to_vsid(vcpu, eaddr >> SID_SHIFT, &vsid);
81 return (((u64)eaddr >> 12) & 0xffff) | (vsid << 16);
84 static void kvmppc_mmu_book3s_32_reset_msr(struct kvm_vcpu *vcpu)
86 kvmppc_set_msr(vcpu, 0);
89 static hva_t kvmppc_mmu_book3s_32_get_pteg(struct kvmppc_vcpu_book3s *vcpu_book3s,
90 struct kvmppc_sr *sre, gva_t eaddr,
93 u32 page, hash, pteg, htabmask;
96 page = (eaddr & 0x0FFFFFFF) >> 12;
97 htabmask = ((vcpu_book3s->sdr1 & 0x1FF) << 16) | 0xFFC0;
99 hash = ((sre->vsid ^ page) << 6);
104 pteg = (vcpu_book3s->sdr1 & 0xffff0000) | hash;
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,
110 r = gfn_to_hva(vcpu_book3s->vcpu.kvm, pteg >> PAGE_SHIFT);
111 if (kvm_is_error_hva(r))
113 return r | (pteg & ~PAGE_MASK);
116 static u32 kvmppc_mmu_book3s_32_get_ptem(struct kvmppc_sr *sre, gva_t eaddr,
119 return ((eaddr & 0x0fffffff) >> 22) | (sre->vsid << 7) |
120 (primary ? 0 : 0x40) | 0x80000000;
123 static int kvmppc_mmu_book3s_32_xlate_bat(struct kvm_vcpu *vcpu, gva_t eaddr,
124 struct kvmppc_pte *pte, bool data)
126 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
127 struct kvmppc_bat *bat;
130 for (i = 0; i < 8; i++) {
132 bat = &vcpu_book3s->dbat[i];
134 bat = &vcpu_book3s->ibat[i];
136 if (vcpu->arch.msr & MSR_PR) {
144 if (check_debug_ip(vcpu))
146 dprintk_pte("%cBAT %02d: 0x%lx - 0x%x (0x%x)\n",
147 data ? 'd' : 'i', i, eaddr, bat->bepi,
150 if ((eaddr & bat->bepi_mask) == bat->bepi) {
152 kvmppc_mmu_book3s_32_esid_to_vsid(vcpu,
153 eaddr >> SID_SHIFT, &vsid);
155 pte->vpage = (((u64)eaddr >> 12) & 0xffff) | vsid;
157 pte->raddr = bat->brpn | (eaddr & ~bat->bepi_mask);
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");
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");
178 static int kvmppc_mmu_book3s_32_xlate_pte(struct kvm_vcpu *vcpu, gva_t eaddr,
179 struct kvmppc_pte *pte, bool data,
182 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
183 struct kvmppc_sr *sre;
190 sre = find_sr(vcpu_book3s, eaddr);
192 dprintk_pte("SR 0x%lx: vsid=0x%x, raw=0x%x\n", eaddr >> 28,
193 sre->vsid, sre->raw);
195 pte->vpage = kvmppc_mmu_book3s_32_ea_to_vp(vcpu, eaddr, data);
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");
203 ptem = kvmppc_mmu_book3s_32_get_ptem(sre, eaddr, primary);
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);
210 for (i=0; i<16; i+=2) {
211 if (ptem == pteg[i]) {
214 pte->raddr = (pteg[i+1] & ~(0xFFFULL)) | (eaddr & 0xFFF);
217 if ((sre->Kp && (vcpu->arch.msr & MSR_PR)) ||
218 (sre->Ks && !(vcpu->arch.msr & MSR_PR)))
221 pte->may_write = false;
222 pte->may_read = false;
223 pte->may_execute = true;
229 pte->may_write = true;
233 pte->may_read = true;
237 if ( !pte->may_read )
240 dprintk_pte("MMU: Found PTE -> %x %x - %x\n",
241 pteg[i], pteg[i+1], pp);
247 /* Update PTE C and A bits, so the guest's swapper knows we used the
250 u32 oldpte = pteg[i+1];
253 pteg[i+1] |= PTEG_FLAG_ACCESSED;
255 pteg[i+1] |= PTEG_FLAG_DIRTY;
257 dprintk_pte("KVM: Mapping read-only page!\n");
259 /* Write back into the PTEG */
260 if (pteg[i+1] != oldpte)
261 copy_to_user((void __user *)ptegp, pteg, sizeof(pteg));
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);
280 static int kvmppc_mmu_book3s_32_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
281 struct kvmppc_pte *pte, bool data)
286 r = kvmppc_mmu_book3s_32_xlate_bat(vcpu, eaddr, pte, data);
288 r = kvmppc_mmu_book3s_32_xlate_pte(vcpu, eaddr, pte, data, true);
290 r = kvmppc_mmu_book3s_32_xlate_pte(vcpu, eaddr, pte, data, false);
296 static u32 kvmppc_mmu_book3s_32_mfsrin(struct kvm_vcpu *vcpu, u32 srnum)
298 return to_book3s(vcpu)->sr[srnum].raw;
301 static void kvmppc_mmu_book3s_32_mtsrin(struct kvm_vcpu *vcpu, u32 srnum,
304 struct kvmppc_sr *sre;
306 sre = &to_book3s(vcpu)->sr[srnum];
308 /* Flush any left-over shadows from the previous SR */
310 /* XXX Not necessary? */
311 /* kvmppc_mmu_pte_flush(vcpu, ((u64)sre->vsid) << 28, 0xf0000000ULL); */
313 /* And then put in the new SR */
315 sre->vsid = (value & 0x0fffffff);
316 sre->valid = (value & 0x80000000) ? false : true;
317 sre->Ks = (value & 0x40000000) ? true : false;
318 sre->Kp = (value & 0x20000000) ? true : false;
319 sre->nx = (value & 0x10000000) ? true : false;
321 /* Map the new segment */
322 kvmppc_mmu_map_segment(vcpu, srnum << SID_SHIFT);
325 static void kvmppc_mmu_book3s_32_tlbie(struct kvm_vcpu *vcpu, ulong ea, bool large)
327 kvmppc_mmu_pte_flush(vcpu, ea, 0x0FFFF000);
330 static int kvmppc_mmu_book3s_32_esid_to_vsid(struct kvm_vcpu *vcpu, ulong esid,
333 ulong ea = esid << SID_SHIFT;
334 struct kvmppc_sr *sr;
337 if (vcpu->arch.msr & (MSR_DR|MSR_IR)) {
338 sr = find_sr(to_book3s(vcpu), ea);
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
346 switch (vcpu->arch.msr & (MSR_DR|MSR_IR)) {
348 *vsid = VSID_REAL | esid;
351 *vsid = VSID_REAL_IR | gvsid;
354 *vsid = VSID_REAL_DR | gvsid;
360 *vsid = VSID_BAT | gvsid;
366 if (vcpu->arch.msr & MSR_PR)
372 static bool kvmppc_mmu_book3s_32_is_dcbz32(struct kvm_vcpu *vcpu)
378 void kvmppc_mmu_book3s_32_init(struct kvm_vcpu *vcpu)
380 struct kvmppc_mmu *mmu = &vcpu->arch.mmu;
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;