2 * Copyright (C) 2010,2012 Freescale Semiconductor, Inc. All rights reserved.
4 * Author: Varun Sethi, <varun.sethi@freescale.com>
7 * This file is derived from arch/powerpc/kvm/e500.c,
8 * by Yu Liu <yu.liu@freescale.com>.
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License, version 2, as
12 * published by the Free Software Foundation.
15 #include <linux/kvm_host.h>
16 #include <linux/slab.h>
17 #include <linux/err.h>
18 #include <linux/export.h>
21 #include <asm/cputable.h>
22 #include <asm/tlbflush.h>
23 #include <asm/kvm_ppc.h>
24 #include <asm/dbell.h>
29 void kvmppc_set_pending_interrupt(struct kvm_vcpu *vcpu, enum int_class type)
31 enum ppc_dbell dbell_type;
35 case INT_CLASS_NONCRIT:
36 dbell_type = PPC_G_DBELL;
39 dbell_type = PPC_G_DBELL_CRIT;
42 dbell_type = PPC_G_DBELL_MC;
45 WARN_ONCE(1, "%s: unknown int type %d\n", __func__, type);
50 tag = PPC_DBELL_LPID(vcpu->kvm->arch.lpid) | vcpu->vcpu_id;
52 ppc_msgsnd(dbell_type, 0, tag);
55 /* gtlbe must not be mapped by more than one host tlb entry */
56 void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500,
57 struct kvm_book3e_206_tlb_entry *gtlbe)
64 ts = get_tlb_ts(gtlbe);
65 tid = get_tlb_tid(gtlbe);
66 lpid = vcpu_e500->vcpu.kvm->arch.lpid;
68 /* We search the host TLB to invalidate its shadow TLB entry */
69 val = (tid << 16) | ts;
70 eaddr = get_tlb_eaddr(gtlbe);
72 local_irq_save(flags);
74 mtspr(SPRN_MAS6, val);
75 mtspr(SPRN_MAS5, MAS5_SGS | lpid);
77 asm volatile("tlbsx 0, %[eaddr]\n" : : [eaddr] "r" (eaddr));
78 val = mfspr(SPRN_MAS1);
79 if (val & MAS1_VALID) {
80 mtspr(SPRN_MAS1, val & ~MAS1_VALID);
81 asm volatile("tlbwe");
84 /* NOTE: tlbsx also updates mas8, so clear it for host tlbwe */
88 local_irq_restore(flags);
91 void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500)
95 local_irq_save(flags);
96 mtspr(SPRN_MAS5, MAS5_SGS | vcpu_e500->vcpu.kvm->arch.lpid);
97 asm volatile("tlbilxlpid");
99 local_irq_restore(flags);
102 void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 pid)
104 vcpu->arch.pid = pid;
107 void kvmppc_mmu_msr_notify(struct kvm_vcpu *vcpu, u32 old_msr)
111 static DEFINE_PER_CPU(struct kvm_vcpu *, last_vcpu_on_cpu);
113 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
115 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
117 kvmppc_booke_vcpu_load(vcpu, cpu);
119 mtspr(SPRN_LPID, vcpu->kvm->arch.lpid);
120 mtspr(SPRN_EPCR, vcpu->arch.shadow_epcr);
121 mtspr(SPRN_GPIR, vcpu->vcpu_id);
122 mtspr(SPRN_MSRP, vcpu->arch.shadow_msrp);
123 mtspr(SPRN_EPLC, vcpu->arch.eplc);
124 mtspr(SPRN_EPSC, vcpu->arch.epsc);
126 mtspr(SPRN_GIVPR, vcpu->arch.ivpr);
127 mtspr(SPRN_GIVOR2, vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE]);
128 mtspr(SPRN_GIVOR8, vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL]);
129 mtspr(SPRN_GSPRG0, (unsigned long)vcpu->arch.shared->sprg0);
130 mtspr(SPRN_GSPRG1, (unsigned long)vcpu->arch.shared->sprg1);
131 mtspr(SPRN_GSPRG2, (unsigned long)vcpu->arch.shared->sprg2);
132 mtspr(SPRN_GSPRG3, (unsigned long)vcpu->arch.shared->sprg3);
134 mtspr(SPRN_GSRR0, vcpu->arch.shared->srr0);
135 mtspr(SPRN_GSRR1, vcpu->arch.shared->srr1);
137 mtspr(SPRN_GEPR, vcpu->arch.epr);
138 mtspr(SPRN_GDEAR, vcpu->arch.shared->dar);
139 mtspr(SPRN_GESR, vcpu->arch.shared->esr);
141 if (vcpu->arch.oldpir != mfspr(SPRN_PIR) ||
142 __get_cpu_var(last_vcpu_on_cpu) != vcpu) {
143 kvmppc_e500_tlbil_all(vcpu_e500);
144 __get_cpu_var(last_vcpu_on_cpu) = vcpu;
147 kvmppc_load_guest_fp(vcpu);
150 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
152 vcpu->arch.eplc = mfspr(SPRN_EPLC);
153 vcpu->arch.epsc = mfspr(SPRN_EPSC);
155 vcpu->arch.shared->sprg0 = mfspr(SPRN_GSPRG0);
156 vcpu->arch.shared->sprg1 = mfspr(SPRN_GSPRG1);
157 vcpu->arch.shared->sprg2 = mfspr(SPRN_GSPRG2);
158 vcpu->arch.shared->sprg3 = mfspr(SPRN_GSPRG3);
160 vcpu->arch.shared->srr0 = mfspr(SPRN_GSRR0);
161 vcpu->arch.shared->srr1 = mfspr(SPRN_GSRR1);
163 vcpu->arch.epr = mfspr(SPRN_GEPR);
164 vcpu->arch.shared->dar = mfspr(SPRN_GDEAR);
165 vcpu->arch.shared->esr = mfspr(SPRN_GESR);
167 vcpu->arch.oldpir = mfspr(SPRN_PIR);
169 kvmppc_booke_vcpu_put(vcpu);
172 int kvmppc_core_check_processor_compat(void)
176 if (strcmp(cur_cpu_spec->cpu_name, "e500mc") == 0)
178 else if (strcmp(cur_cpu_spec->cpu_name, "e5500") == 0)
186 int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu)
188 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
190 vcpu->arch.shadow_epcr = SPRN_EPCR_DSIGS | SPRN_EPCR_DGTMI | \
193 vcpu->arch.shadow_epcr |= SPRN_EPCR_ICM;
195 vcpu->arch.shadow_msrp = MSRP_UCLEP | MSRP_DEP | MSRP_PMMP;
196 vcpu->arch.eplc = EPC_EGS | (vcpu->kvm->arch.lpid << EPC_ELPID_SHIFT);
197 vcpu->arch.epsc = vcpu->arch.eplc;
199 vcpu->arch.pvr = mfspr(SPRN_PVR);
200 vcpu_e500->svr = mfspr(SPRN_SVR);
202 vcpu->arch.cpu_type = KVM_CPU_E500MC;
207 void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
209 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
211 sregs->u.e.features |= KVM_SREGS_E_ARCH206_MMU | KVM_SREGS_E_PM |
213 sregs->u.e.impl_id = KVM_SREGS_E_IMPL_FSL;
215 sregs->u.e.impl.fsl.features = 0;
216 sregs->u.e.impl.fsl.svr = vcpu_e500->svr;
217 sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0;
218 sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar;
220 kvmppc_get_sregs_e500_tlb(vcpu, sregs);
222 sregs->u.e.ivor_high[3] =
223 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR];
224 sregs->u.e.ivor_high[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL];
225 sregs->u.e.ivor_high[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT];
227 kvmppc_get_sregs_ivor(vcpu, sregs);
230 int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
232 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
235 if (sregs->u.e.impl_id == KVM_SREGS_E_IMPL_FSL) {
236 vcpu_e500->svr = sregs->u.e.impl.fsl.svr;
237 vcpu_e500->hid0 = sregs->u.e.impl.fsl.hid0;
238 vcpu_e500->mcar = sregs->u.e.impl.fsl.mcar;
241 ret = kvmppc_set_sregs_e500_tlb(vcpu, sregs);
245 if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
248 if (sregs->u.e.features & KVM_SREGS_E_PM) {
249 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] =
250 sregs->u.e.ivor_high[3];
253 if (sregs->u.e.features & KVM_SREGS_E_PC) {
254 vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL] =
255 sregs->u.e.ivor_high[4];
256 vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT] =
257 sregs->u.e.ivor_high[5];
260 return kvmppc_set_sregs_ivor(vcpu, sregs);
263 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
265 struct kvmppc_vcpu_e500 *vcpu_e500;
266 struct kvm_vcpu *vcpu;
269 vcpu_e500 = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
274 vcpu = &vcpu_e500->vcpu;
276 /* Invalid PIR value -- this LPID dosn't have valid state on any cpu */
277 vcpu->arch.oldpir = 0xffffffff;
279 err = kvm_vcpu_init(vcpu, kvm, id);
283 err = kvmppc_e500_tlb_init(vcpu_e500);
287 vcpu->arch.shared = (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
288 if (!vcpu->arch.shared)
294 kvmppc_e500_tlb_uninit(vcpu_e500);
296 kvm_vcpu_uninit(vcpu);
299 kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
304 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
306 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
308 free_page((unsigned long)vcpu->arch.shared);
309 kvmppc_e500_tlb_uninit(vcpu_e500);
310 kvm_vcpu_uninit(vcpu);
311 kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
314 int kvmppc_core_init_vm(struct kvm *kvm)
318 lpid = kvmppc_alloc_lpid();
322 kvm->arch.lpid = lpid;
326 void kvmppc_core_destroy_vm(struct kvm *kvm)
328 kvmppc_free_lpid(kvm->arch.lpid);
331 static int __init kvmppc_e500mc_init(void)
335 r = kvmppc_booke_init();
339 kvmppc_init_lpid(64);
340 kvmppc_claim_lpid(0); /* host */
342 return kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), 0, THIS_MODULE);
345 static void __exit kvmppc_e500mc_exit(void)
350 module_init(kvmppc_e500mc_init);
351 module_exit(kvmppc_e500mc_exit);