2 * Copyright (C) 2011. Freescale Inc. All rights reserved.
5 * Alexander Graf <agraf@suse.de>
6 * Paul Mackerras <paulus@samba.org>
10 * Hypercall handling for running PAPR guests in PR KVM on Book 3S
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License, version 2, as
15 * published by the Free Software Foundation.
18 #include <linux/anon_inodes.h>
20 #include <asm/uaccess.h>
21 #include <asm/kvm_ppc.h>
22 #include <asm/kvm_book3s.h>
24 #define HPTE_SIZE 16 /* bytes per HPT entry */
26 static unsigned long get_pteg_addr(struct kvm_vcpu *vcpu, long pte_index)
28 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
29 unsigned long pteg_addr;
32 pte_index &= ((1 << ((vcpu_book3s->sdr1 & 0x1f) + 11)) - 1) << 7 | 0x70;
33 pteg_addr = vcpu_book3s->sdr1 & 0xfffffffffffc0000ULL;
34 pteg_addr |= pte_index;
39 static int kvmppc_h_pr_enter(struct kvm_vcpu *vcpu)
41 long flags = kvmppc_get_gpr(vcpu, 4);
42 long pte_index = kvmppc_get_gpr(vcpu, 5);
43 unsigned long pteg[2 * 8];
44 unsigned long pteg_addr, i, *hpte;
49 pteg_addr = get_pteg_addr(vcpu, pte_index);
51 mutex_lock(&vcpu->kvm->arch.hpt_mutex);
52 copy_from_user(pteg, (void __user *)pteg_addr, sizeof(pteg));
56 if (likely((flags & H_EXACT) == 0)) {
60 if ((be64_to_cpu(*hpte) & HPTE_V_VALID) == 0)
66 if (*hpte & HPTE_V_VALID)
70 hpte[0] = cpu_to_be64(kvmppc_get_gpr(vcpu, 6));
71 hpte[1] = cpu_to_be64(kvmppc_get_gpr(vcpu, 7));
72 pteg_addr += i * HPTE_SIZE;
73 copy_to_user((void __user *)pteg_addr, hpte, HPTE_SIZE);
74 kvmppc_set_gpr(vcpu, 4, pte_index | i);
78 mutex_unlock(&vcpu->kvm->arch.hpt_mutex);
79 kvmppc_set_gpr(vcpu, 3, ret);
84 static int kvmppc_h_pr_remove(struct kvm_vcpu *vcpu)
86 unsigned long flags= kvmppc_get_gpr(vcpu, 4);
87 unsigned long pte_index = kvmppc_get_gpr(vcpu, 5);
88 unsigned long avpn = kvmppc_get_gpr(vcpu, 6);
89 unsigned long v = 0, pteg, rb;
93 pteg = get_pteg_addr(vcpu, pte_index);
94 mutex_lock(&vcpu->kvm->arch.hpt_mutex);
95 copy_from_user(pte, (void __user *)pteg, sizeof(pte));
96 pte[0] = be64_to_cpu(pte[0]);
97 pte[1] = be64_to_cpu(pte[1]);
100 if ((pte[0] & HPTE_V_VALID) == 0 ||
101 ((flags & H_AVPN) && (pte[0] & ~0x7fUL) != avpn) ||
102 ((flags & H_ANDCOND) && (pte[0] & avpn) != 0))
105 copy_to_user((void __user *)pteg, &v, sizeof(v));
107 rb = compute_tlbie_rb(pte[0], pte[1], pte_index);
108 vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
111 kvmppc_set_gpr(vcpu, 4, pte[0]);
112 kvmppc_set_gpr(vcpu, 5, pte[1]);
115 mutex_unlock(&vcpu->kvm->arch.hpt_mutex);
116 kvmppc_set_gpr(vcpu, 3, ret);
121 /* Request defs for kvmppc_h_pr_bulk_remove() */
122 #define H_BULK_REMOVE_TYPE 0xc000000000000000ULL
123 #define H_BULK_REMOVE_REQUEST 0x4000000000000000ULL
124 #define H_BULK_REMOVE_RESPONSE 0x8000000000000000ULL
125 #define H_BULK_REMOVE_END 0xc000000000000000ULL
126 #define H_BULK_REMOVE_CODE 0x3000000000000000ULL
127 #define H_BULK_REMOVE_SUCCESS 0x0000000000000000ULL
128 #define H_BULK_REMOVE_NOT_FOUND 0x1000000000000000ULL
129 #define H_BULK_REMOVE_PARM 0x2000000000000000ULL
130 #define H_BULK_REMOVE_HW 0x3000000000000000ULL
131 #define H_BULK_REMOVE_RC 0x0c00000000000000ULL
132 #define H_BULK_REMOVE_FLAGS 0x0300000000000000ULL
133 #define H_BULK_REMOVE_ABSOLUTE 0x0000000000000000ULL
134 #define H_BULK_REMOVE_ANDCOND 0x0100000000000000ULL
135 #define H_BULK_REMOVE_AVPN 0x0200000000000000ULL
136 #define H_BULK_REMOVE_PTEX 0x00ffffffffffffffULL
137 #define H_BULK_REMOVE_MAX_BATCH 4
139 static int kvmppc_h_pr_bulk_remove(struct kvm_vcpu *vcpu)
145 mutex_lock(&vcpu->kvm->arch.hpt_mutex);
146 for (i = 0; i < H_BULK_REMOVE_MAX_BATCH; i++) {
147 unsigned long tsh = kvmppc_get_gpr(vcpu, paramnr+(2*i));
148 unsigned long tsl = kvmppc_get_gpr(vcpu, paramnr+(2*i)+1);
149 unsigned long pteg, rb, flags;
150 unsigned long pte[2];
153 if ((tsh & H_BULK_REMOVE_TYPE) == H_BULK_REMOVE_END) {
154 break; /* Exit success */
155 } else if ((tsh & H_BULK_REMOVE_TYPE) !=
156 H_BULK_REMOVE_REQUEST) {
158 break; /* Exit fail */
161 tsh &= H_BULK_REMOVE_PTEX | H_BULK_REMOVE_FLAGS;
162 tsh |= H_BULK_REMOVE_RESPONSE;
164 if ((tsh & H_BULK_REMOVE_ANDCOND) &&
165 (tsh & H_BULK_REMOVE_AVPN)) {
166 tsh |= H_BULK_REMOVE_PARM;
167 kvmppc_set_gpr(vcpu, paramnr+(2*i), tsh);
169 break; /* Exit fail */
172 pteg = get_pteg_addr(vcpu, tsh & H_BULK_REMOVE_PTEX);
173 copy_from_user(pte, (void __user *)pteg, sizeof(pte));
174 pte[0] = be64_to_cpu(pte[0]);
175 pte[1] = be64_to_cpu(pte[1]);
178 flags = (tsh & H_BULK_REMOVE_FLAGS) >> 26;
180 if ((pte[0] & HPTE_V_VALID) == 0 ||
181 ((flags & H_AVPN) && (pte[0] & ~0x7fUL) != tsl) ||
182 ((flags & H_ANDCOND) && (pte[0] & tsl) != 0)) {
183 tsh |= H_BULK_REMOVE_NOT_FOUND;
185 /* Splat the pteg in (userland) hpt */
186 copy_to_user((void __user *)pteg, &v, sizeof(v));
188 rb = compute_tlbie_rb(pte[0], pte[1],
189 tsh & H_BULK_REMOVE_PTEX);
190 vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
191 tsh |= H_BULK_REMOVE_SUCCESS;
192 tsh |= (pte[1] & (HPTE_R_C | HPTE_R_R)) << 43;
194 kvmppc_set_gpr(vcpu, paramnr+(2*i), tsh);
196 mutex_unlock(&vcpu->kvm->arch.hpt_mutex);
197 kvmppc_set_gpr(vcpu, 3, ret);
202 static int kvmppc_h_pr_protect(struct kvm_vcpu *vcpu)
204 unsigned long flags = kvmppc_get_gpr(vcpu, 4);
205 unsigned long pte_index = kvmppc_get_gpr(vcpu, 5);
206 unsigned long avpn = kvmppc_get_gpr(vcpu, 6);
207 unsigned long rb, pteg, r, v;
208 unsigned long pte[2];
211 pteg = get_pteg_addr(vcpu, pte_index);
212 mutex_lock(&vcpu->kvm->arch.hpt_mutex);
213 copy_from_user(pte, (void __user *)pteg, sizeof(pte));
214 pte[0] = be64_to_cpu(pte[0]);
215 pte[1] = be64_to_cpu(pte[1]);
218 if ((pte[0] & HPTE_V_VALID) == 0 ||
219 ((flags & H_AVPN) && (pte[0] & ~0x7fUL) != avpn))
224 r &= ~(HPTE_R_PP0 | HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_HI |
226 r |= (flags << 55) & HPTE_R_PP0;
227 r |= (flags << 48) & HPTE_R_KEY_HI;
228 r |= flags & (HPTE_R_PP | HPTE_R_N | HPTE_R_KEY_LO);
232 rb = compute_tlbie_rb(v, r, pte_index);
233 vcpu->arch.mmu.tlbie(vcpu, rb, rb & 1 ? true : false);
234 pte[0] = cpu_to_be64(pte[0]);
235 pte[1] = cpu_to_be64(pte[1]);
236 copy_to_user((void __user *)pteg, pte, sizeof(pte));
240 mutex_unlock(&vcpu->kvm->arch.hpt_mutex);
241 kvmppc_set_gpr(vcpu, 3, ret);
246 static int kvmppc_h_pr_put_tce(struct kvm_vcpu *vcpu)
248 unsigned long liobn = kvmppc_get_gpr(vcpu, 4);
249 unsigned long ioba = kvmppc_get_gpr(vcpu, 5);
250 unsigned long tce = kvmppc_get_gpr(vcpu, 6);
253 rc = kvmppc_h_put_tce(vcpu, liobn, ioba, tce);
254 if (rc == H_TOO_HARD)
256 kvmppc_set_gpr(vcpu, 3, rc);
260 static int kvmppc_h_pr_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd)
262 long rc = kvmppc_xics_hcall(vcpu, cmd);
263 kvmppc_set_gpr(vcpu, 3, rc);
267 int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd)
271 return kvmppc_h_pr_enter(vcpu);
273 return kvmppc_h_pr_remove(vcpu);
275 return kvmppc_h_pr_protect(vcpu);
277 return kvmppc_h_pr_bulk_remove(vcpu);
279 return kvmppc_h_pr_put_tce(vcpu);
281 kvmppc_set_msr_fast(vcpu, kvmppc_get_msr(vcpu) | MSR_EE);
282 kvm_vcpu_block(vcpu);
283 clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
284 vcpu->stat.halt_wakeup++;
292 if (kvmppc_xics_enabled(vcpu))
293 return kvmppc_h_pr_xics_hcall(vcpu, cmd);
296 if (list_empty(&vcpu->kvm->arch.rtas_tokens))
298 if (kvmppc_rtas_hcall(vcpu))
300 kvmppc_set_gpr(vcpu, 3, 0);