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1/*
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.
5 *
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.
10 *
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.
14 *
15 * Copyright IBM Corp. 2007
16 *
17 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
18 */
19
20#ifndef __POWERPC_KVM_HOST_H__
21#define __POWERPC_KVM_HOST_H__
22
23#include <linux/mutex.h>
24#include <linux/hrtimer.h>
25#include <linux/interrupt.h>
26#include <linux/types.h>
27#include <linux/kvm_types.h>
28#include <linux/threads.h>
29#include <linux/spinlock.h>
30#include <linux/kvm_para.h>
31#include <linux/list.h>
32#include <linux/atomic.h>
33#include <asm/kvm_asm.h>
34#include <asm/processor.h>
35#include <asm/page.h>
36
37#define KVM_MAX_VCPUS NR_CPUS
38#define KVM_MAX_VCORES NR_CPUS
39#define KVM_MEMORY_SLOTS 32
40/* memory slots that does not exposed to userspace */
41#define KVM_PRIVATE_MEM_SLOTS 4
42#define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
43
44#ifdef CONFIG_KVM_MMIO
45#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
46#endif
47
48#ifdef CONFIG_KVM_BOOK3S_64_HV
49#include <linux/mmu_notifier.h>
50
51#define KVM_ARCH_WANT_MMU_NOTIFIER
52
53struct kvm;
54extern int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
55extern int kvm_age_hva(struct kvm *kvm, unsigned long hva);
56extern int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
57extern void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
58
59#endif
60
61/* We don't currently support large pages. */
62#define KVM_HPAGE_GFN_SHIFT(x) 0
63#define KVM_NR_PAGE_SIZES 1
64#define KVM_PAGES_PER_HPAGE(x) (1UL<<31)
65
66#define HPTEG_CACHE_NUM (1 << 15)
67#define HPTEG_HASH_BITS_PTE 13
68#define HPTEG_HASH_BITS_PTE_LONG 12
69#define HPTEG_HASH_BITS_VPTE 13
70#define HPTEG_HASH_BITS_VPTE_LONG 5
71#define HPTEG_HASH_NUM_PTE (1 << HPTEG_HASH_BITS_PTE)
72#define HPTEG_HASH_NUM_PTE_LONG (1 << HPTEG_HASH_BITS_PTE_LONG)
73#define HPTEG_HASH_NUM_VPTE (1 << HPTEG_HASH_BITS_VPTE)
74#define HPTEG_HASH_NUM_VPTE_LONG (1 << HPTEG_HASH_BITS_VPTE_LONG)
75
76/* Physical Address Mask - allowed range of real mode RAM access */
77#define KVM_PAM 0x0fffffffffffffffULL
78
79struct kvm;
80struct kvm_run;
81struct kvm_vcpu;
82
83struct lppaca;
84struct slb_shadow;
85struct dtl_entry;
86
87struct kvm_vm_stat {
88 u32 remote_tlb_flush;
89};
90
91struct kvm_vcpu_stat {
92 u32 sum_exits;
93 u32 mmio_exits;
94 u32 dcr_exits;
95 u32 signal_exits;
96 u32 light_exits;
97 /* Account for special types of light exits: */
98 u32 itlb_real_miss_exits;
99 u32 itlb_virt_miss_exits;
100 u32 dtlb_real_miss_exits;
101 u32 dtlb_virt_miss_exits;
102 u32 syscall_exits;
103 u32 isi_exits;
104 u32 dsi_exits;
105 u32 emulated_inst_exits;
106 u32 dec_exits;
107 u32 ext_intr_exits;
108 u32 halt_wakeup;
109 u32 dbell_exits;
110 u32 gdbell_exits;
111#ifdef CONFIG_PPC_BOOK3S
112 u32 pf_storage;
113 u32 pf_instruc;
114 u32 sp_storage;
115 u32 sp_instruc;
116 u32 queue_intr;
117 u32 ld;
118 u32 ld_slow;
119 u32 st;
120 u32 st_slow;
121#endif
122};
123
124enum kvm_exit_types {
125 MMIO_EXITS,
126 DCR_EXITS,
127 SIGNAL_EXITS,
128 ITLB_REAL_MISS_EXITS,
129 ITLB_VIRT_MISS_EXITS,
130 DTLB_REAL_MISS_EXITS,
131 DTLB_VIRT_MISS_EXITS,
132 SYSCALL_EXITS,
133 ISI_EXITS,
134 DSI_EXITS,
135 EMULATED_INST_EXITS,
136 EMULATED_MTMSRWE_EXITS,
137 EMULATED_WRTEE_EXITS,
138 EMULATED_MTSPR_EXITS,
139 EMULATED_MFSPR_EXITS,
140 EMULATED_MTMSR_EXITS,
141 EMULATED_MFMSR_EXITS,
142 EMULATED_TLBSX_EXITS,
143 EMULATED_TLBWE_EXITS,
144 EMULATED_RFI_EXITS,
145 EMULATED_RFCI_EXITS,
146 DEC_EXITS,
147 EXT_INTR_EXITS,
148 HALT_WAKEUP,
149 USR_PR_INST,
150 FP_UNAVAIL,
151 DEBUG_EXITS,
152 TIMEINGUEST,
153 DBELL_EXITS,
154 GDBELL_EXITS,
155 __NUMBER_OF_KVM_EXIT_TYPES
156};
157
158/* allow access to big endian 32bit upper/lower parts and 64bit var */
159struct kvmppc_exit_timing {
160 union {
161 u64 tv64;
162 struct {
163 u32 tbu, tbl;
164 } tv32;
165 };
166};
167
168struct kvmppc_pginfo {
169 unsigned long pfn;
170 atomic_t refcnt;
171};
172
173struct kvmppc_spapr_tce_table {
174 struct list_head list;
175 struct kvm *kvm;
176 u64 liobn;
177 u32 window_size;
178 struct page *pages[0];
179};
180
181struct kvmppc_linear_info {
182 void *base_virt;
183 unsigned long base_pfn;
184 unsigned long npages;
185 struct list_head list;
186 atomic_t use_count;
187 int type;
188};
189
190/*
191 * The reverse mapping array has one entry for each HPTE,
192 * which stores the guest's view of the second word of the HPTE
193 * (including the guest physical address of the mapping),
194 * plus forward and backward pointers in a doubly-linked ring
195 * of HPTEs that map the same host page. The pointers in this
196 * ring are 32-bit HPTE indexes, to save space.
197 */
198struct revmap_entry {
199 unsigned long guest_rpte;
200 unsigned int forw, back;
201};
202
203/*
204 * We use the top bit of each memslot->rmap entry as a lock bit,
205 * and bit 32 as a present flag. The bottom 32 bits are the
206 * index in the guest HPT of a HPTE that points to the page.
207 */
208#define KVMPPC_RMAP_LOCK_BIT 63
209#define KVMPPC_RMAP_RC_SHIFT 32
210#define KVMPPC_RMAP_REFERENCED (HPTE_R_R << KVMPPC_RMAP_RC_SHIFT)
211#define KVMPPC_RMAP_CHANGED (HPTE_R_C << KVMPPC_RMAP_RC_SHIFT)
212#define KVMPPC_RMAP_PRESENT 0x100000000ul
213#define KVMPPC_RMAP_INDEX 0xfffffffful
214
215/* Low-order bits in kvm->arch.slot_phys[][] */
216#define KVMPPC_PAGE_ORDER_MASK 0x1f
217#define KVMPPC_PAGE_NO_CACHE HPTE_R_I /* 0x20 */
218#define KVMPPC_PAGE_WRITETHRU HPTE_R_W /* 0x40 */
219#define KVMPPC_GOT_PAGE 0x80
220
221struct kvm_arch_memory_slot {
222};
223
224struct kvm_arch {
225 unsigned int lpid;
226#ifdef CONFIG_KVM_BOOK3S_64_HV
227 unsigned long hpt_virt;
228 struct revmap_entry *revmap;
229 unsigned int host_lpid;
230 unsigned long host_lpcr;
231 unsigned long sdr1;
232 unsigned long host_sdr1;
233 int tlbie_lock;
234 unsigned long lpcr;
235 unsigned long rmor;
236 struct kvmppc_linear_info *rma;
237 unsigned long vrma_slb_v;
238 int rma_setup_done;
239 int using_mmu_notifiers;
240 spinlock_t slot_phys_lock;
241 unsigned long *slot_phys[KVM_MEM_SLOTS_NUM];
242 int slot_npages[KVM_MEM_SLOTS_NUM];
243 unsigned short last_vcpu[NR_CPUS];
244 struct kvmppc_vcore *vcores[KVM_MAX_VCORES];
245 struct kvmppc_linear_info *hpt_li;
246#endif /* CONFIG_KVM_BOOK3S_64_HV */
247#ifdef CONFIG_PPC_BOOK3S_64
248 struct list_head spapr_tce_tables;
249#endif
250};
251
252/*
253 * Struct for a virtual core.
254 * Note: entry_exit_count combines an entry count in the bottom 8 bits
255 * and an exit count in the next 8 bits. This is so that we can
256 * atomically increment the entry count iff the exit count is 0
257 * without taking the lock.
258 */
259struct kvmppc_vcore {
260 int n_runnable;
261 int n_busy;
262 int num_threads;
263 int entry_exit_count;
264 int n_woken;
265 int nap_count;
266 int napping_threads;
267 u16 pcpu;
268 u8 vcore_state;
269 u8 in_guest;
270 struct list_head runnable_threads;
271 spinlock_t lock;
272 wait_queue_head_t wq;
273 u64 stolen_tb;
274 u64 preempt_tb;
275 struct kvm_vcpu *runner;
276};
277
278#define VCORE_ENTRY_COUNT(vc) ((vc)->entry_exit_count & 0xff)
279#define VCORE_EXIT_COUNT(vc) ((vc)->entry_exit_count >> 8)
280
281/* Values for vcore_state */
282#define VCORE_INACTIVE 0
283#define VCORE_RUNNING 1
284#define VCORE_EXITING 2
285#define VCORE_SLEEPING 3
286
287/*
288 * Struct used to manage memory for a virtual processor area
289 * registered by a PAPR guest. There are three types of area
290 * that a guest can register.
291 */
292struct kvmppc_vpa {
293 void *pinned_addr; /* Address in kernel linear mapping */
294 void *pinned_end; /* End of region */
295 unsigned long next_gpa; /* Guest phys addr for update */
296 unsigned long len; /* Number of bytes required */
297 u8 update_pending; /* 1 => update pinned_addr from next_gpa */
298};
299
300struct kvmppc_pte {
301 ulong eaddr;
302 u64 vpage;
303 ulong raddr;
304 bool may_read : 1;
305 bool may_write : 1;
306 bool may_execute : 1;
307};
308
309struct kvmppc_mmu {
310 /* book3s_64 only */
311 void (*slbmte)(struct kvm_vcpu *vcpu, u64 rb, u64 rs);
312 u64 (*slbmfee)(struct kvm_vcpu *vcpu, u64 slb_nr);
313 u64 (*slbmfev)(struct kvm_vcpu *vcpu, u64 slb_nr);
314 void (*slbie)(struct kvm_vcpu *vcpu, u64 slb_nr);
315 void (*slbia)(struct kvm_vcpu *vcpu);
316 /* book3s */
317 void (*mtsrin)(struct kvm_vcpu *vcpu, u32 srnum, ulong value);
318 u32 (*mfsrin)(struct kvm_vcpu *vcpu, u32 srnum);
319 int (*xlate)(struct kvm_vcpu *vcpu, gva_t eaddr, struct kvmppc_pte *pte, bool data);
320 void (*reset_msr)(struct kvm_vcpu *vcpu);
321 void (*tlbie)(struct kvm_vcpu *vcpu, ulong addr, bool large);
322 int (*esid_to_vsid)(struct kvm_vcpu *vcpu, ulong esid, u64 *vsid);
323 u64 (*ea_to_vp)(struct kvm_vcpu *vcpu, gva_t eaddr, bool data);
324 bool (*is_dcbz32)(struct kvm_vcpu *vcpu);
325};
326
327struct kvmppc_slb {
328 u64 esid;
329 u64 vsid;
330 u64 orige;
331 u64 origv;
332 bool valid : 1;
333 bool Ks : 1;
334 bool Kp : 1;
335 bool nx : 1;
336 bool large : 1; /* PTEs are 16MB */
337 bool tb : 1; /* 1TB segment */
338 bool class : 1;
339};
340
341struct kvm_vcpu_arch {
342 ulong host_stack;
343 u32 host_pid;
344#ifdef CONFIG_PPC_BOOK3S
345 struct kvmppc_slb slb[64];
346 int slb_max; /* 1 + index of last valid entry in slb[] */
347 int slb_nr; /* total number of entries in SLB */
348 struct kvmppc_mmu mmu;
349#endif
350
351 ulong gpr[32];
352
353 u64 fpr[32];
354 u64 fpscr;
355
356#ifdef CONFIG_SPE
357 ulong evr[32];
358 ulong spefscr;
359 ulong host_spefscr;
360 u64 acc;
361#endif
362#ifdef CONFIG_ALTIVEC
363 vector128 vr[32];
364 vector128 vscr;
365#endif
366
367#ifdef CONFIG_VSX
368 u64 vsr[64];
369#endif
370
371#ifdef CONFIG_KVM_BOOKE_HV
372 u32 host_mas4;
373 u32 host_mas6;
374 u32 shadow_epcr;
375 u32 epcr;
376 u32 shadow_msrp;
377 u32 eplc;
378 u32 epsc;
379 u32 oldpir;
380#endif
381
382#ifdef CONFIG_PPC_BOOK3S
383 /* For Gekko paired singles */
384 u32 qpr[32];
385#endif
386
387 ulong pc;
388 ulong ctr;
389 ulong lr;
390
391 ulong xer;
392 u32 cr;
393
394#ifdef CONFIG_PPC_BOOK3S
395 ulong hflags;
396 ulong guest_owned_ext;
397 ulong purr;
398 ulong spurr;
399 ulong dscr;
400 ulong amr;
401 ulong uamor;
402 u32 ctrl;
403 ulong dabr;
404#endif
405 u32 vrsave; /* also USPRG0 */
406 u32 mmucr;
407 /* shadow_msr is unused for BookE HV */
408 ulong shadow_msr;
409 ulong csrr0;
410 ulong csrr1;
411 ulong dsrr0;
412 ulong dsrr1;
413 ulong mcsrr0;
414 ulong mcsrr1;
415 ulong mcsr;
416 u32 dec;
417 u32 decar;
418 u32 tbl;
419 u32 tbu;
420 u32 tcr;
421 ulong tsr; /* we need to perform set/clr_bits() which requires ulong */
422 u32 ivor[64];
423 ulong ivpr;
424 u32 pvr;
425
426 u32 shadow_pid;
427 u32 shadow_pid1;
428 u32 pid;
429 u32 swap_pid;
430
431 u32 ccr0;
432 u32 ccr1;
433 u32 dbcr0;
434 u32 dbcr1;
435 u32 dbsr;
436
437 u64 mmcr[3];
438 u32 pmc[8];
439
440#ifdef CONFIG_KVM_EXIT_TIMING
441 struct mutex exit_timing_lock;
442 struct kvmppc_exit_timing timing_exit;
443 struct kvmppc_exit_timing timing_last_enter;
444 u32 last_exit_type;
445 u32 timing_count_type[__NUMBER_OF_KVM_EXIT_TYPES];
446 u64 timing_sum_duration[__NUMBER_OF_KVM_EXIT_TYPES];
447 u64 timing_sum_quad_duration[__NUMBER_OF_KVM_EXIT_TYPES];
448 u64 timing_min_duration[__NUMBER_OF_KVM_EXIT_TYPES];
449 u64 timing_max_duration[__NUMBER_OF_KVM_EXIT_TYPES];
450 u64 timing_last_exit;
451 struct dentry *debugfs_exit_timing;
452#endif
453
454#ifdef CONFIG_PPC_BOOK3S
455 ulong fault_dar;
456 u32 fault_dsisr;
457#endif
458
459#ifdef CONFIG_BOOKE
460 ulong fault_dear;
461 ulong fault_esr;
462 ulong queued_dear;
463 ulong queued_esr;
464 u32 tlbcfg[4];
465 u32 mmucfg;
466 u32 epr;
467#endif
468 gpa_t paddr_accessed;
469 gva_t vaddr_accessed;
470
471 u8 io_gpr; /* GPR used as IO source/target */
472 u8 mmio_is_bigendian;
473 u8 mmio_sign_extend;
474 u8 dcr_needed;
475 u8 dcr_is_write;
476 u8 osi_needed;
477 u8 osi_enabled;
478 u8 papr_enabled;
479 u8 sane;
480 u8 cpu_type;
481 u8 hcall_needed;
482
483 u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */
484
485 struct hrtimer dec_timer;
486 struct tasklet_struct tasklet;
487 u64 dec_jiffies;
488 u64 dec_expires;
489 unsigned long pending_exceptions;
490 u16 last_cpu;
491 u8 ceded;
492 u8 prodded;
493 u32 last_inst;
494
495 wait_queue_head_t *wqp;
496 struct kvmppc_vcore *vcore;
497 int ret;
498 int trap;
499 int state;
500 int ptid;
501 bool timer_running;
502 wait_queue_head_t cpu_run;
503
504 struct kvm_vcpu_arch_shared *shared;
505 unsigned long magic_page_pa; /* phys addr to map the magic page to */
506 unsigned long magic_page_ea; /* effect. addr to map the magic page to */
507
508#ifdef CONFIG_KVM_BOOK3S_64_HV
509 struct kvm_vcpu_arch_shared shregs;
510
511 unsigned long pgfault_addr;
512 long pgfault_index;
513 unsigned long pgfault_hpte[2];
514
515 struct list_head run_list;
516 struct task_struct *run_task;
517 struct kvm_run *kvm_run;
518 pgd_t *pgdir;
519
520 spinlock_t vpa_update_lock;
521 struct kvmppc_vpa vpa;
522 struct kvmppc_vpa dtl;
523 struct dtl_entry *dtl_ptr;
524 unsigned long dtl_index;
525 u64 stolen_logged;
526 struct kvmppc_vpa slb_shadow;
527#endif
528};
529
530/* Values for vcpu->arch.state */
531#define KVMPPC_VCPU_STOPPED 0
532#define KVMPPC_VCPU_BUSY_IN_HOST 1
533#define KVMPPC_VCPU_RUNNABLE 2
534
535/* Values for vcpu->arch.io_gpr */
536#define KVM_MMIO_REG_MASK 0x001f
537#define KVM_MMIO_REG_EXT_MASK 0xffe0
538#define KVM_MMIO_REG_GPR 0x0000
539#define KVM_MMIO_REG_FPR 0x0020
540#define KVM_MMIO_REG_QPR 0x0040
541#define KVM_MMIO_REG_FQPR 0x0060
542
543#define __KVM_HAVE_ARCH_WQP
544
545#endif /* __POWERPC_KVM_HOST_H__ */