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 IBM Corp. 2008
16 * Copyright 2011 Freescale Semiconductor, Inc.
18 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
21 #include <linux/kvm_host.h>
22 #include <asm/disassemble.h>
26 #define OP_19_XOP_RFI 50
27 #define OP_19_XOP_RFCI 51
29 #define OP_31_XOP_MFMSR 83
30 #define OP_31_XOP_WRTEE 131
31 #define OP_31_XOP_MTMSR 146
32 #define OP_31_XOP_WRTEEI 163
34 static void kvmppc_emul_rfi(struct kvm_vcpu *vcpu)
36 vcpu->arch.pc = vcpu->arch.shared->srr0;
37 kvmppc_set_msr(vcpu, vcpu->arch.shared->srr1);
40 static void kvmppc_emul_rfci(struct kvm_vcpu *vcpu)
42 vcpu->arch.pc = vcpu->arch.csrr0;
43 kvmppc_set_msr(vcpu, vcpu->arch.csrr1);
46 int kvmppc_booke_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
47 unsigned int inst, int *advance)
49 int emulated = EMULATE_DONE;
50 int rs = get_rs(inst);
51 int rt = get_rt(inst);
53 switch (get_op(inst)) {
55 switch (get_xop(inst)) {
57 kvmppc_emul_rfi(vcpu);
58 kvmppc_set_exit_type(vcpu, EMULATED_RFI_EXITS);
63 kvmppc_emul_rfci(vcpu);
64 kvmppc_set_exit_type(vcpu, EMULATED_RFCI_EXITS);
69 emulated = EMULATE_FAIL;
75 switch (get_xop(inst)) {
78 kvmppc_set_gpr(vcpu, rt, vcpu->arch.shared->msr);
79 kvmppc_set_exit_type(vcpu, EMULATED_MFMSR_EXITS);
83 kvmppc_set_exit_type(vcpu, EMULATED_MTMSR_EXITS);
84 kvmppc_set_msr(vcpu, kvmppc_get_gpr(vcpu, rs));
88 vcpu->arch.shared->msr = (vcpu->arch.shared->msr & ~MSR_EE)
89 | (kvmppc_get_gpr(vcpu, rs) & MSR_EE);
90 kvmppc_set_exit_type(vcpu, EMULATED_WRTEE_EXITS);
93 case OP_31_XOP_WRTEEI:
94 vcpu->arch.shared->msr = (vcpu->arch.shared->msr & ~MSR_EE)
96 kvmppc_set_exit_type(vcpu, EMULATED_WRTEE_EXITS);
100 emulated = EMULATE_FAIL;
106 emulated = EMULATE_FAIL;
113 * NOTE: some of these registers are not emulated on BOOKE_HV (GS-mode).
114 * Their backing store is in real registers, and these functions
115 * will return the wrong result if called for them in another context
116 * (such as debugging).
118 int kvmppc_booke_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
120 int emulated = EMULATE_DONE;
124 vcpu->arch.shared->dar = spr_val;
127 vcpu->arch.shared->esr = spr_val;
130 vcpu->arch.csrr0 = spr_val;
133 vcpu->arch.csrr1 = spr_val;
136 vcpu->arch.dbg_reg.dbcr0 = spr_val;
139 vcpu->arch.dbg_reg.dbcr1 = spr_val;
142 vcpu->arch.dbsr &= ~spr_val;
145 kvmppc_clr_tsr_bits(vcpu, spr_val);
149 * WRC is a 2-bit field that is supposed to preserve its
150 * value once written to non-zero.
152 if (vcpu->arch.tcr & TCR_WRC_MASK) {
153 spr_val &= ~TCR_WRC_MASK;
154 spr_val |= vcpu->arch.tcr & TCR_WRC_MASK;
156 kvmppc_set_tcr(vcpu, spr_val);
160 vcpu->arch.decar = spr_val;
163 * Note: SPRG4-7 are user-readable.
164 * These values are loaded into the real SPRGs when resuming the
165 * guest (PR-mode only).
168 vcpu->arch.shared->sprg4 = spr_val;
171 vcpu->arch.shared->sprg5 = spr_val;
174 vcpu->arch.shared->sprg6 = spr_val;
177 vcpu->arch.shared->sprg7 = spr_val;
181 vcpu->arch.ivpr = spr_val;
182 #ifdef CONFIG_KVM_BOOKE_HV
183 mtspr(SPRN_GIVPR, spr_val);
187 vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL] = spr_val;
190 vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK] = spr_val;
193 vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE] = spr_val;
194 #ifdef CONFIG_KVM_BOOKE_HV
195 mtspr(SPRN_GIVOR2, spr_val);
199 vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE] = spr_val;
202 vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL] = spr_val;
205 vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT] = spr_val;
208 vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM] = spr_val;
211 vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL] = spr_val;
214 vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL] = spr_val;
215 #ifdef CONFIG_KVM_BOOKE_HV
216 mtspr(SPRN_GIVOR8, spr_val);
220 vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL] = spr_val;
223 vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER] = spr_val;
226 vcpu->arch.ivor[BOOKE_IRQPRIO_FIT] = spr_val;
229 vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG] = spr_val;
232 vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS] = spr_val;
235 vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS] = spr_val;
238 vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG] = spr_val;
241 vcpu->arch.mcsr &= ~spr_val;
243 #if defined(CONFIG_64BIT)
245 kvmppc_set_epcr(vcpu, spr_val);
246 #ifdef CONFIG_KVM_BOOKE_HV
247 mtspr(SPRN_EPCR, vcpu->arch.shadow_epcr);
252 emulated = EMULATE_FAIL;
258 int kvmppc_booke_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
260 int emulated = EMULATE_DONE;
264 *spr_val = vcpu->arch.ivpr;
267 *spr_val = vcpu->arch.shared->dar;
270 *spr_val = vcpu->arch.shared->esr;
273 *spr_val = vcpu->arch.epr;
276 *spr_val = vcpu->arch.csrr0;
279 *spr_val = vcpu->arch.csrr1;
282 *spr_val = vcpu->arch.dbg_reg.dbcr0;
285 *spr_val = vcpu->arch.dbg_reg.dbcr1;
288 *spr_val = vcpu->arch.dbsr;
291 *spr_val = vcpu->arch.tsr;
294 *spr_val = vcpu->arch.tcr;
298 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_CRITICAL];
301 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_MACHINE_CHECK];
304 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE];
307 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_INST_STORAGE];
310 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_EXTERNAL];
313 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_ALIGNMENT];
316 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_PROGRAM];
319 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_FP_UNAVAIL];
322 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL];
325 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_AP_UNAVAIL];
328 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DECREMENTER];
331 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_FIT];
334 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_WATCHDOG];
337 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DTLB_MISS];
340 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_ITLB_MISS];
343 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DEBUG];
346 *spr_val = vcpu->arch.mcsr;
348 #if defined(CONFIG_64BIT)
350 *spr_val = vcpu->arch.epcr;
355 emulated = EMULATE_FAIL;