~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/arch/powerpc/kvm/e500mc.c

Version: ~ [ linux-5.10-rc1 ] ~ [ linux-5.9.1 ] ~ [ linux-5.8.16 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.72 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.152 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.202 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.240 ] ~ [ linux-4.8.17 ] ~ [ linux-4.7.10 ] ~ [ linux-4.6.7 ] ~ [ linux-4.5.7 ] ~ [ linux-4.4.240 ] ~ [ linux-4.3.6 ] ~ [ linux-4.2.8 ] ~ [ linux-4.1.52 ] ~ [ linux-4.0.9 ] ~ [ linux-3.19.8 ] ~ [ linux-3.18.140 ] ~ [ linux-3.17.8 ] ~ [ linux-3.16.85 ] ~ [ linux-3.15.10 ] ~ [ linux-3.14.79 ] ~ [ linux-3.13.11 ] ~ [ linux-3.12.74 ] ~ [ linux-3.11.10 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.5 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

  1 /*
  2  * Copyright (C) 2010,2012 Freescale Semiconductor, Inc. All rights reserved.
  3  *
  4  * Author: Varun Sethi, <varun.sethi@freescale.com>
  5  *
  6  * Description:
  7  * This file is derived from arch/powerpc/kvm/e500.c,
  8  * by Yu Liu <yu.liu@freescale.com>.
  9  *
 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.
 13  */
 14 
 15 #include <linux/kvm_host.h>
 16 #include <linux/slab.h>
 17 #include <linux/err.h>
 18 #include <linux/export.h>
 19 
 20 #include <asm/reg.h>
 21 #include <asm/cputable.h>
 22 #include <asm/tlbflush.h>
 23 #include <asm/kvm_ppc.h>
 24 #include <asm/dbell.h>
 25 
 26 #include "booke.h"
 27 #include "e500.h"
 28 
 29 void kvmppc_set_pending_interrupt(struct kvm_vcpu *vcpu, enum int_class type)
 30 {
 31         enum ppc_dbell dbell_type;
 32         unsigned long tag;
 33 
 34         switch (type) {
 35         case INT_CLASS_NONCRIT:
 36                 dbell_type = PPC_G_DBELL;
 37                 break;
 38         case INT_CLASS_CRIT:
 39                 dbell_type = PPC_G_DBELL_CRIT;
 40                 break;
 41         case INT_CLASS_MC:
 42                 dbell_type = PPC_G_DBELL_MC;
 43                 break;
 44         default:
 45                 WARN_ONCE(1, "%s: unknown int type %d\n", __func__, type);
 46                 return;
 47         }
 48 
 49 
 50         tag = PPC_DBELL_LPID(vcpu->kvm->arch.lpid) | vcpu->vcpu_id;
 51         mb();
 52         ppc_msgsnd(dbell_type, 0, tag);
 53 }
 54 
 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)
 58 {
 59         unsigned int tid, ts;
 60         gva_t eaddr;
 61         u32 val, lpid;
 62         unsigned long flags;
 63 
 64         ts = get_tlb_ts(gtlbe);
 65         tid = get_tlb_tid(gtlbe);
 66         lpid = vcpu_e500->vcpu.kvm->arch.lpid;
 67 
 68         /* We search the host TLB to invalidate its shadow TLB entry */
 69         val = (tid << 16) | ts;
 70         eaddr = get_tlb_eaddr(gtlbe);
 71 
 72         local_irq_save(flags);
 73 
 74         mtspr(SPRN_MAS6, val);
 75         mtspr(SPRN_MAS5, MAS5_SGS | lpid);
 76 
 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");
 82         }
 83         mtspr(SPRN_MAS5, 0);
 84         /* NOTE: tlbsx also updates mas8, so clear it for host tlbwe */
 85         mtspr(SPRN_MAS8, 0);
 86         isync();
 87 
 88         local_irq_restore(flags);
 89 }
 90 
 91 void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500)
 92 {
 93         unsigned long flags;
 94 
 95         local_irq_save(flags);
 96         mtspr(SPRN_MAS5, MAS5_SGS | vcpu_e500->vcpu.kvm->arch.lpid);
 97         asm volatile("tlbilxlpid");
 98         mtspr(SPRN_MAS5, 0);
 99         local_irq_restore(flags);
100 }
101 
102 void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 pid)
103 {
104         vcpu->arch.pid = pid;
105 }
106 
107 void kvmppc_mmu_msr_notify(struct kvm_vcpu *vcpu, u32 old_msr)
108 {
109 }
110 
111 static DEFINE_PER_CPU(struct kvm_vcpu *, last_vcpu_on_cpu);
112 
113 static void kvmppc_core_vcpu_load_e500mc(struct kvm_vcpu *vcpu, int cpu)
114 {
115         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
116 
117         kvmppc_booke_vcpu_load(vcpu, cpu);
118 
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);
125 
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);
133 
134         mtspr(SPRN_GSRR0, vcpu->arch.shared->srr0);
135         mtspr(SPRN_GSRR1, vcpu->arch.shared->srr1);
136 
137         mtspr(SPRN_GEPR, vcpu->arch.epr);
138         mtspr(SPRN_GDEAR, vcpu->arch.shared->dar);
139         mtspr(SPRN_GESR, vcpu->arch.shared->esr);
140 
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;
145         }
146 
147         kvmppc_load_guest_fp(vcpu);
148 }
149 
150 static void kvmppc_core_vcpu_put_e500mc(struct kvm_vcpu *vcpu)
151 {
152         vcpu->arch.eplc = mfspr(SPRN_EPLC);
153         vcpu->arch.epsc = mfspr(SPRN_EPSC);
154 
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);
159 
160         vcpu->arch.shared->srr0 = mfspr(SPRN_GSRR0);
161         vcpu->arch.shared->srr1 = mfspr(SPRN_GSRR1);
162 
163         vcpu->arch.epr = mfspr(SPRN_GEPR);
164         vcpu->arch.shared->dar = mfspr(SPRN_GDEAR);
165         vcpu->arch.shared->esr = mfspr(SPRN_GESR);
166 
167         vcpu->arch.oldpir = mfspr(SPRN_PIR);
168 
169         kvmppc_booke_vcpu_put(vcpu);
170 }
171 
172 int kvmppc_core_check_processor_compat(void)
173 {
174         int r;
175 
176         if (strcmp(cur_cpu_spec->cpu_name, "e500mc") == 0)
177                 r = 0;
178         else if (strcmp(cur_cpu_spec->cpu_name, "e5500") == 0)
179                 r = 0;
180         else
181                 r = -ENOTSUPP;
182 
183         return r;
184 }
185 
186 int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu)
187 {
188         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
189 
190         vcpu->arch.shadow_epcr = SPRN_EPCR_DSIGS | SPRN_EPCR_DGTMI | \
191                                  SPRN_EPCR_DUVD;
192 #ifdef CONFIG_64BIT
193         vcpu->arch.shadow_epcr |= SPRN_EPCR_ICM;
194 #endif
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;
198 
199         vcpu->arch.pvr = mfspr(SPRN_PVR);
200         vcpu_e500->svr = mfspr(SPRN_SVR);
201 
202         vcpu->arch.cpu_type = KVM_CPU_E500MC;
203 
204         return 0;
205 }
206 
207 static int kvmppc_core_get_sregs_e500mc(struct kvm_vcpu *vcpu,
208                                         struct kvm_sregs *sregs)
209 {
210         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
211 
212         sregs->u.e.features |= KVM_SREGS_E_ARCH206_MMU | KVM_SREGS_E_PM |
213                                KVM_SREGS_E_PC;
214         sregs->u.e.impl_id = KVM_SREGS_E_IMPL_FSL;
215 
216         sregs->u.e.impl.fsl.features = 0;
217         sregs->u.e.impl.fsl.svr = vcpu_e500->svr;
218         sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0;
219         sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar;
220 
221         kvmppc_get_sregs_e500_tlb(vcpu, sregs);
222 
223         sregs->u.e.ivor_high[3] =
224                 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR];
225         sregs->u.e.ivor_high[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL];
226         sregs->u.e.ivor_high[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT];
227 
228         return kvmppc_get_sregs_ivor(vcpu, sregs);
229 }
230 
231 static int kvmppc_core_set_sregs_e500mc(struct kvm_vcpu *vcpu,
232                                         struct kvm_sregs *sregs)
233 {
234         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
235         int ret;
236 
237         if (sregs->u.e.impl_id == KVM_SREGS_E_IMPL_FSL) {
238                 vcpu_e500->svr = sregs->u.e.impl.fsl.svr;
239                 vcpu_e500->hid0 = sregs->u.e.impl.fsl.hid0;
240                 vcpu_e500->mcar = sregs->u.e.impl.fsl.mcar;
241         }
242 
243         ret = kvmppc_set_sregs_e500_tlb(vcpu, sregs);
244         if (ret < 0)
245                 return ret;
246 
247         if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
248                 return 0;
249 
250         if (sregs->u.e.features & KVM_SREGS_E_PM) {
251                 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] =
252                         sregs->u.e.ivor_high[3];
253         }
254 
255         if (sregs->u.e.features & KVM_SREGS_E_PC) {
256                 vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL] =
257                         sregs->u.e.ivor_high[4];
258                 vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT] =
259                         sregs->u.e.ivor_high[5];
260         }
261 
262         return kvmppc_set_sregs_ivor(vcpu, sregs);
263 }
264 
265 static int kvmppc_get_one_reg_e500mc(struct kvm_vcpu *vcpu, u64 id,
266                               union kvmppc_one_reg *val)
267 {
268         int r = kvmppc_get_one_reg_e500_tlb(vcpu, id, val);
269         return r;
270 }
271 
272 static int kvmppc_set_one_reg_e500mc(struct kvm_vcpu *vcpu, u64 id,
273                               union kvmppc_one_reg *val)
274 {
275         int r = kvmppc_set_one_reg_e500_tlb(vcpu, id, val);
276         return r;
277 }
278 
279 static struct kvm_vcpu *kvmppc_core_vcpu_create_e500mc(struct kvm *kvm,
280                                                        unsigned int id)
281 {
282         struct kvmppc_vcpu_e500 *vcpu_e500;
283         struct kvm_vcpu *vcpu;
284         int err;
285 
286         vcpu_e500 = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
287         if (!vcpu_e500) {
288                 err = -ENOMEM;
289                 goto out;
290         }
291         vcpu = &vcpu_e500->vcpu;
292 
293         /* Invalid PIR value -- this LPID dosn't have valid state on any cpu */
294         vcpu->arch.oldpir = 0xffffffff;
295 
296         err = kvm_vcpu_init(vcpu, kvm, id);
297         if (err)
298                 goto free_vcpu;
299 
300         err = kvmppc_e500_tlb_init(vcpu_e500);
301         if (err)
302                 goto uninit_vcpu;
303 
304         vcpu->arch.shared = (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
305         if (!vcpu->arch.shared)
306                 goto uninit_tlb;
307 
308         return vcpu;
309 
310 uninit_tlb:
311         kvmppc_e500_tlb_uninit(vcpu_e500);
312 uninit_vcpu:
313         kvm_vcpu_uninit(vcpu);
314 
315 free_vcpu:
316         kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
317 out:
318         return ERR_PTR(err);
319 }
320 
321 static void kvmppc_core_vcpu_free_e500mc(struct kvm_vcpu *vcpu)
322 {
323         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
324 
325         free_page((unsigned long)vcpu->arch.shared);
326         kvmppc_e500_tlb_uninit(vcpu_e500);
327         kvm_vcpu_uninit(vcpu);
328         kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
329 }
330 
331 static int kvmppc_core_init_vm_e500mc(struct kvm *kvm)
332 {
333         int lpid;
334 
335         lpid = kvmppc_alloc_lpid();
336         if (lpid < 0)
337                 return lpid;
338 
339         kvm->arch.lpid = lpid;
340         return 0;
341 }
342 
343 static void kvmppc_core_destroy_vm_e500mc(struct kvm *kvm)
344 {
345         kvmppc_free_lpid(kvm->arch.lpid);
346 }
347 
348 static struct kvmppc_ops kvm_ops_e500mc = {
349         .get_sregs = kvmppc_core_get_sregs_e500mc,
350         .set_sregs = kvmppc_core_set_sregs_e500mc,
351         .get_one_reg = kvmppc_get_one_reg_e500mc,
352         .set_one_reg = kvmppc_set_one_reg_e500mc,
353         .vcpu_load   = kvmppc_core_vcpu_load_e500mc,
354         .vcpu_put    = kvmppc_core_vcpu_put_e500mc,
355         .vcpu_create = kvmppc_core_vcpu_create_e500mc,
356         .vcpu_free   = kvmppc_core_vcpu_free_e500mc,
357         .mmu_destroy  = kvmppc_mmu_destroy_e500,
358         .init_vm = kvmppc_core_init_vm_e500mc,
359         .destroy_vm = kvmppc_core_destroy_vm_e500mc,
360         .emulate_op = kvmppc_core_emulate_op_e500,
361         .emulate_mtspr = kvmppc_core_emulate_mtspr_e500,
362         .emulate_mfspr = kvmppc_core_emulate_mfspr_e500,
363 };
364 
365 static int __init kvmppc_e500mc_init(void)
366 {
367         int r;
368 
369         r = kvmppc_booke_init();
370         if (r)
371                 goto err_out;
372 
373         kvmppc_init_lpid(64);
374         kvmppc_claim_lpid(0); /* host */
375 
376         r = kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), 0, THIS_MODULE);
377         if (r)
378                 goto err_out;
379         kvm_ops_e500mc.owner = THIS_MODULE;
380         kvmppc_pr_ops = &kvm_ops_e500mc;
381 
382 err_out:
383         return r;
384 }
385 
386 static void __exit kvmppc_e500mc_exit(void)
387 {
388         kvmppc_pr_ops = NULL;
389         kvmppc_booke_exit();
390 }
391 
392 module_init(kvmppc_e500mc_init);
393 module_exit(kvmppc_e500mc_exit);
394 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | Wiki (Japanese) | Wiki (English) | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

osdn.jp