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kvm_host.h
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1 /*
2  * kvm_host.h: used for kvm module, and hold ia64-specific sections.
3  *
4  * Copyright (C) 2007, Intel Corporation.
5  *
6  * Xiantao Zhang <[email protected]>
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms and conditions of the GNU General Public License,
10  * version 2, as published by the Free Software Foundation.
11  *
12  * This program is distributed in the hope it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15  * more details.
16  *
17  * You should have received a copy of the GNU General Public License along with
18  * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
19  * Place - Suite 330, Boston, MA 02111-1307 USA.
20  *
21  */
22 
23 #ifndef __ASM_KVM_HOST_H
24 #define __ASM_KVM_HOST_H
25 
26 #define KVM_MEMORY_SLOTS 32
27 /* memory slots that does not exposed to userspace */
28 #define KVM_PRIVATE_MEM_SLOTS 4
29 
30 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1
31 
32 /* define exit reasons from vmm to kvm*/
33 #define EXIT_REASON_VM_PANIC 0
34 #define EXIT_REASON_MMIO_INSTRUCTION 1
35 #define EXIT_REASON_PAL_CALL 2
36 #define EXIT_REASON_SAL_CALL 3
37 #define EXIT_REASON_SWITCH_RR6 4
38 #define EXIT_REASON_VM_DESTROY 5
39 #define EXIT_REASON_EXTERNAL_INTERRUPT 6
40 #define EXIT_REASON_IPI 7
41 #define EXIT_REASON_PTC_G 8
42 #define EXIT_REASON_DEBUG 20
43 
44 /*Define vmm address space and vm data space.*/
45 #define KVM_VMM_SIZE (__IA64_UL_CONST(16)<<20)
46 #define KVM_VMM_SHIFT 24
47 #define KVM_VMM_BASE 0xD000000000000000
48 #define VMM_SIZE (__IA64_UL_CONST(8)<<20)
49 
50 /*
51  * Define vm_buffer, used by PAL Services, base address.
52  * Note: vm_buffer is in the VMM-BLOCK, the size must be < 8M
53  */
54 #define KVM_VM_BUFFER_BASE (KVM_VMM_BASE + VMM_SIZE)
55 #define KVM_VM_BUFFER_SIZE (__IA64_UL_CONST(8)<<20)
56 
57 /*
58  * kvm guest's data area looks as follow:
59  *
60  * +----------------------+ ------- KVM_VM_DATA_SIZE
61  * | vcpu[n]'s data | | ___________________KVM_STK_OFFSET
62  * | | | / |
63  * | .......... | | /vcpu's struct&stack |
64  * | .......... | | /---------------------|---- 0
65  * | vcpu[5]'s data | | / vpd |
66  * | vcpu[4]'s data | |/-----------------------|
67  * | vcpu[3]'s data | / vtlb |
68  * | vcpu[2]'s data | /|------------------------|
69  * | vcpu[1]'s data |/ | vhpt |
70  * | vcpu[0]'s data |____________________________|
71  * +----------------------+ |
72  * | memory dirty log | |
73  * +----------------------+ |
74  * | vm's data struct | |
75  * +----------------------+ |
76  * | | |
77  * | | |
78  * | | |
79  * | | |
80  * | | |
81  * | | |
82  * | | |
83  * | vm's p2m table | |
84  * | | |
85  * | | |
86  * | | | |
87  * vm's data->| | | |
88  * +----------------------+ ------- 0
89  * To support large memory, needs to increase the size of p2m.
90  * To support more vcpus, needs to ensure it has enough space to
91  * hold vcpus' data.
92  */
93 
94 #define KVM_VM_DATA_SHIFT 26
95 #define KVM_VM_DATA_SIZE (__IA64_UL_CONST(1) << KVM_VM_DATA_SHIFT)
96 #define KVM_VM_DATA_BASE (KVM_VMM_BASE + KVM_VM_DATA_SIZE)
97 
98 #define KVM_P2M_BASE KVM_VM_DATA_BASE
99 #define KVM_P2M_SIZE (__IA64_UL_CONST(24) << 20)
100 
101 #define VHPT_SHIFT 16
102 #define VHPT_SIZE (__IA64_UL_CONST(1) << VHPT_SHIFT)
103 #define VHPT_NUM_ENTRIES (__IA64_UL_CONST(1) << (VHPT_SHIFT-5))
104 
105 #define VTLB_SHIFT 16
106 #define VTLB_SIZE (__IA64_UL_CONST(1) << VTLB_SHIFT)
107 #define VTLB_NUM_ENTRIES (1UL << (VHPT_SHIFT-5))
108 
109 #define VPD_SHIFT 16
110 #define VPD_SIZE (__IA64_UL_CONST(1) << VPD_SHIFT)
111 
112 #define VCPU_STRUCT_SHIFT 16
113 #define VCPU_STRUCT_SIZE (__IA64_UL_CONST(1) << VCPU_STRUCT_SHIFT)
114 
115 /*
116  * This must match KVM_IA64_VCPU_STACK_{SHIFT,SIZE} arch/ia64/include/asm/kvm.h
117  */
118 #define KVM_STK_SHIFT 16
119 #define KVM_STK_OFFSET (__IA64_UL_CONST(1)<< KVM_STK_SHIFT)
120 
121 #define KVM_VM_STRUCT_SHIFT 19
122 #define KVM_VM_STRUCT_SIZE (__IA64_UL_CONST(1) << KVM_VM_STRUCT_SHIFT)
123 
124 #define KVM_MEM_DIRY_LOG_SHIFT 19
125 #define KVM_MEM_DIRTY_LOG_SIZE (__IA64_UL_CONST(1) << KVM_MEM_DIRY_LOG_SHIFT)
126 
127 #ifndef __ASSEMBLY__
128 
129 /*Define the max vcpus and memory for Guests.*/
130 #define KVM_MAX_VCPUS (KVM_VM_DATA_SIZE - KVM_P2M_SIZE - KVM_VM_STRUCT_SIZE -\
131  KVM_MEM_DIRTY_LOG_SIZE) / sizeof(struct kvm_vcpu_data)
132 #define KVM_MAX_MEM_SIZE (KVM_P2M_SIZE >> 3 << PAGE_SHIFT)
133 
134 #define VMM_LOG_LEN 256
135 
136 #include <linux/types.h>
137 #include <linux/mm.h>
138 #include <linux/kvm.h>
139 #include <linux/kvm_para.h>
140 #include <linux/kvm_types.h>
141 
142 #include <asm/pal.h>
143 #include <asm/sal.h>
144 #include <asm/page.h>
145 
146 struct kvm_vcpu_data {
147  char vcpu_vhpt[VHPT_SIZE];
148  char vcpu_vtlb[VTLB_SIZE];
149  char vcpu_vpd[VPD_SIZE];
150  char vcpu_struct[VCPU_STRUCT_SIZE];
151 };
152 
153 struct kvm_vm_data {
154  char kvm_p2m[KVM_P2M_SIZE];
155  char kvm_vm_struct[KVM_VM_STRUCT_SIZE];
156  char kvm_mem_dirty_log[KVM_MEM_DIRTY_LOG_SIZE];
157  struct kvm_vcpu_data vcpu_data[KVM_MAX_VCPUS];
158 };
159 
160 #define VCPU_BASE(n) (KVM_VM_DATA_BASE + \
161  offsetof(struct kvm_vm_data, vcpu_data[n]))
162 #define KVM_VM_BASE (KVM_VM_DATA_BASE + \
163  offsetof(struct kvm_vm_data, kvm_vm_struct))
164 #define KVM_MEM_DIRTY_LOG_BASE KVM_VM_DATA_BASE + \
165  offsetof(struct kvm_vm_data, kvm_mem_dirty_log)
166 
167 #define VHPT_BASE(n) (VCPU_BASE(n) + offsetof(struct kvm_vcpu_data, vcpu_vhpt))
168 #define VTLB_BASE(n) (VCPU_BASE(n) + offsetof(struct kvm_vcpu_data, vcpu_vtlb))
169 #define VPD_BASE(n) (VCPU_BASE(n) + offsetof(struct kvm_vcpu_data, vcpu_vpd))
170 #define VCPU_STRUCT_BASE(n) (VCPU_BASE(n) + \
171  offsetof(struct kvm_vcpu_data, vcpu_struct))
172 
173 /*IO section definitions*/
174 #define IOREQ_READ 1
175 #define IOREQ_WRITE 0
176 
177 #define STATE_IOREQ_NONE 0
178 #define STATE_IOREQ_READY 1
179 #define STATE_IOREQ_INPROCESS 2
180 #define STATE_IORESP_READY 3
181 
182 /*Guest Physical address layout.*/
183 #define GPFN_MEM (0UL << 60) /* Guest pfn is normal mem */
184 #define GPFN_FRAME_BUFFER (1UL << 60) /* VGA framebuffer */
185 #define GPFN_LOW_MMIO (2UL << 60) /* Low MMIO range */
186 #define GPFN_PIB (3UL << 60) /* PIB base */
187 #define GPFN_IOSAPIC (4UL << 60) /* IOSAPIC base */
188 #define GPFN_LEGACY_IO (5UL << 60) /* Legacy I/O base */
189 #define GPFN_GFW (6UL << 60) /* Guest Firmware */
190 #define GPFN_PHYS_MMIO (7UL << 60) /* Directed MMIO Range */
191 
192 #define GPFN_IO_MASK (7UL << 60) /* Guest pfn is I/O type */
193 #define GPFN_INV_MASK (1UL << 63) /* Guest pfn is invalid */
194 #define INVALID_MFN (~0UL)
195 #define MEM_G (1UL << 30)
196 #define MEM_M (1UL << 20)
197 #define MMIO_START (3 * MEM_G)
198 #define MMIO_SIZE (512 * MEM_M)
199 #define VGA_IO_START 0xA0000UL
200 #define VGA_IO_SIZE 0x20000
201 #define LEGACY_IO_START (MMIO_START + MMIO_SIZE)
202 #define LEGACY_IO_SIZE (64 * MEM_M)
203 #define IO_SAPIC_START 0xfec00000UL
204 #define IO_SAPIC_SIZE 0x100000
205 #define PIB_START 0xfee00000UL
206 #define PIB_SIZE 0x200000
207 #define GFW_START (4 * MEM_G - 16 * MEM_M)
208 #define GFW_SIZE (16 * MEM_M)
209 
210 /*Deliver mode, defined for ioapic.c*/
211 #define dest_Fixed IOSAPIC_FIXED
212 #define dest_LowestPrio IOSAPIC_LOWEST_PRIORITY
213 
214 #define NMI_VECTOR 2
215 #define ExtINT_VECTOR 0
216 #define NULL_VECTOR (-1)
217 #define IA64_SPURIOUS_INT_VECTOR 0x0f
218 
219 #define VCPU_LID(v) (((u64)(v)->vcpu_id) << 24)
220 
221 /*
222  *Delivery mode
223  */
224 #define SAPIC_DELIV_SHIFT 8
225 #define SAPIC_FIXED 0x0
226 #define SAPIC_LOWEST_PRIORITY 0x1
227 #define SAPIC_PMI 0x2
228 #define SAPIC_NMI 0x4
229 #define SAPIC_INIT 0x5
230 #define SAPIC_EXTINT 0x7
231 
232 /*
233  * vcpu->requests bit members for arch
234  */
235 #define KVM_REQ_PTC_G 32
236 #define KVM_REQ_RESUME 33
237 
238 #define KVM_HPAGE_GFN_SHIFT(x) 0
239 #define KVM_NR_PAGE_SIZES 1
240 #define KVM_PAGES_PER_HPAGE(x) 1
241 
242 struct kvm;
243 struct kvm_vcpu;
244 
245 struct kvm_mmio_req {
246  uint64_t addr; /* physical address */
247  uint64_t size; /* size in bytes */
248  uint64_t data; /* data (or paddr of data) */
249  uint8_t state:4;
250  uint8_t dir:1; /* 1=read, 0=write */
251 };
252 
253 /*Pal data struct */
254 struct kvm_pal_call{
255  /*In area*/
256  uint64_t gr28;
257  uint64_t gr29;
258  uint64_t gr30;
259  uint64_t gr31;
260  /*Out area*/
261  struct ia64_pal_retval ret;
262 };
263 
264 /* Sal data structure */
265 struct kvm_sal_call{
266  /*In area*/
267  uint64_t in0;
268  uint64_t in1;
269  uint64_t in2;
270  uint64_t in3;
271  uint64_t in4;
272  uint64_t in5;
273  uint64_t in6;
274  uint64_t in7;
275  struct sal_ret_values ret;
276 };
277 
278 /*Guest change rr6*/
279 struct kvm_switch_rr6 {
280  uint64_t old_rr;
281  uint64_t new_rr;
282 };
283 
284 union ia64_ipi_a{
285  unsigned long val;
286  struct {
287  unsigned long rv : 3;
288  unsigned long ir : 1;
289  unsigned long eid : 8;
290  unsigned long id : 8;
291  unsigned long ib_base : 44;
292  };
293 };
294 
295 union ia64_ipi_d {
296  unsigned long val;
297  struct {
298  unsigned long vector : 8;
299  unsigned long dm : 3;
300  unsigned long ig : 53;
301  };
302 };
303 
304 /*ipi check exit data*/
305 struct kvm_ipi_data{
306  union ia64_ipi_a addr;
307  union ia64_ipi_d data;
308 };
309 
310 /*global purge data*/
311 struct kvm_ptc_g {
312  unsigned long vaddr;
313  unsigned long rr;
314  unsigned long ps;
315  struct kvm_vcpu *vcpu;
316 };
317 
318 /*Exit control data */
319 struct exit_ctl_data{
320  uint32_t exit_reason;
321  uint32_t vm_status;
322  union {
323  struct kvm_mmio_req ioreq;
324  struct kvm_pal_call pal_data;
325  struct kvm_sal_call sal_data;
326  struct kvm_switch_rr6 rr_data;
327  struct kvm_ipi_data ipi_data;
328  struct kvm_ptc_g ptc_g_data;
329  } u;
330 };
331 
332 union pte_flags {
333  unsigned long val;
334  struct {
335  unsigned long p : 1; /*0 */
336  unsigned long : 1; /* 1 */
337  unsigned long ma : 3; /* 2-4 */
338  unsigned long a : 1; /* 5 */
339  unsigned long d : 1; /* 6 */
340  unsigned long pl : 2; /* 7-8 */
341  unsigned long ar : 3; /* 9-11 */
342  unsigned long ppn : 38; /* 12-49 */
343  unsigned long : 2; /* 50-51 */
344  unsigned long ed : 1; /* 52 */
345  };
346 };
347 
348 union ia64_pta {
349  unsigned long val;
350  struct {
351  unsigned long ve : 1;
352  unsigned long reserved0 : 1;
353  unsigned long size : 6;
354  unsigned long vf : 1;
355  unsigned long reserved1 : 6;
356  unsigned long base : 49;
357  };
358 };
359 
360 struct thash_cb {
361  /* THASH base information */
362  struct thash_data *hash; /* hash table pointer */
363  union ia64_pta pta;
364  int num;
365 };
366 
367 struct kvm_vcpu_stat {
368  u32 halt_wakeup;
369 };
370 
371 struct kvm_vcpu_arch {
372  int launched;
373  int last_exit;
374  int last_run_cpu;
375  int vmm_tr_slot;
376  int vm_tr_slot;
377  int sn_rtc_tr_slot;
378 
379 #define KVM_MP_STATE_RUNNABLE 0
380 #define KVM_MP_STATE_UNINITIALIZED 1
381 #define KVM_MP_STATE_INIT_RECEIVED 2
382 #define KVM_MP_STATE_HALTED 3
383  int mp_state;
384 
385 #define MAX_PTC_G_NUM 3
386  int ptc_g_count;
387  struct kvm_ptc_g ptc_g_data[MAX_PTC_G_NUM];
388 
389  /*halt timer to wake up sleepy vcpus*/
390  struct hrtimer hlt_timer;
391  long ht_active;
392 
393  struct kvm_lapic *apic; /* kernel irqchip context */
394  struct vpd *vpd;
395 
396  /* Exit data for vmm_transition*/
397  struct exit_ctl_data exit_data;
398 
399  cpumask_t cache_coherent_map;
400 
401  unsigned long vmm_rr;
402  unsigned long host_rr6;
403  unsigned long psbits[8];
404  unsigned long cr_iipa;
405  unsigned long cr_isr;
406  unsigned long vsa_base;
407  unsigned long dirty_log_lock_pa;
408  unsigned long __gp;
409  /* TR and TC. */
410  struct thash_data itrs[NITRS];
411  struct thash_data dtrs[NDTRS];
412  /* Bit is set if there is a tr/tc for the region. */
413  unsigned char itr_regions;
414  unsigned char dtr_regions;
415  unsigned char tc_regions;
416  /* purge all */
417  unsigned long ptce_base;
418  unsigned long ptce_count[2];
419  unsigned long ptce_stride[2];
420  /* itc/itm */
421  unsigned long last_itc;
422  long itc_offset;
423  unsigned long itc_check;
424  unsigned long timer_check;
425  unsigned int timer_pending;
426  unsigned int timer_fired;
427 
428  unsigned long vrr[8];
429  unsigned long ibr[8];
430  unsigned long dbr[8];
431  unsigned long insvc[4]; /* Interrupt in service. */
432  unsigned long xtp;
433 
434  unsigned long metaphysical_rr0; /* from kvm_arch (so is pinned) */
435  unsigned long metaphysical_rr4; /* from kvm_arch (so is pinned) */
436  unsigned long metaphysical_saved_rr0; /* from kvm_arch */
437  unsigned long metaphysical_saved_rr4; /* from kvm_arch */
438  unsigned long fp_psr; /*used for lazy float register */
439  unsigned long saved_gp;
440  /*for phycial emulation */
441  int mode_flags;
442  struct thash_cb vtlb;
443  struct thash_cb vhpt;
444  char irq_check;
445  char irq_new_pending;
446 
447  unsigned long opcode;
448  unsigned long cause;
449  char log_buf[VMM_LOG_LEN];
450  union context host;
451  union context guest;
452 
453  char mmio_data[8];
454 };
455 
456 struct kvm_vm_stat {
457  u64 remote_tlb_flush;
458 };
459 
460 struct kvm_sal_data {
461  unsigned long boot_ip;
462  unsigned long boot_gp;
463 };
464 
465 struct kvm_arch_memory_slot {
466 };
467 
468 struct kvm_arch {
469  spinlock_t dirty_log_lock;
470 
471  unsigned long vm_base;
472  unsigned long metaphysical_rr0;
473  unsigned long metaphysical_rr4;
474  unsigned long vmm_init_rr;
475 
476  int is_sn2;
477 
478  struct kvm_ioapic *vioapic;
479  struct kvm_vm_stat stat;
480  struct kvm_sal_data rdv_sal_data;
481 
482  struct list_head assigned_dev_head;
483  struct iommu_domain *iommu_domain;
484  int iommu_flags;
485 
486  unsigned long irq_sources_bitmap;
487  unsigned long irq_states[KVM_IOAPIC_NUM_PINS];
488 };
489 
490 union cpuid3_t {
491  u64 value;
492  struct {
493  u64 number : 8;
494  u64 revision : 8;
495  u64 model : 8;
496  u64 family : 8;
497  u64 archrev : 8;
498  u64 rv : 24;
499  };
500 };
501 
502 struct kvm_pt_regs {
503  /* The following registers are saved by SAVE_MIN: */
504  unsigned long b6; /* scratch */
505  unsigned long b7; /* scratch */
506 
507  unsigned long ar_csd; /* used by cmp8xchg16 (scratch) */
508  unsigned long ar_ssd; /* reserved for future use (scratch) */
509 
510  unsigned long r8; /* scratch (return value register 0) */
511  unsigned long r9; /* scratch (return value register 1) */
512  unsigned long r10; /* scratch (return value register 2) */
513  unsigned long r11; /* scratch (return value register 3) */
514 
515  unsigned long cr_ipsr; /* interrupted task's psr */
516  unsigned long cr_iip; /* interrupted task's instruction pointer */
517  unsigned long cr_ifs; /* interrupted task's function state */
518 
519  unsigned long ar_unat; /* interrupted task's NaT register (preserved) */
520  unsigned long ar_pfs; /* prev function state */
521  unsigned long ar_rsc; /* RSE configuration */
522  /* The following two are valid only if cr_ipsr.cpl > 0: */
523  unsigned long ar_rnat; /* RSE NaT */
524  unsigned long ar_bspstore; /* RSE bspstore */
525 
526  unsigned long pr; /* 64 predicate registers (1 bit each) */
527  unsigned long b0; /* return pointer (bp) */
528  unsigned long loadrs; /* size of dirty partition << 16 */
529 
530  unsigned long r1; /* the gp pointer */
531  unsigned long r12; /* interrupted task's memory stack pointer */
532  unsigned long r13; /* thread pointer */
533 
534  unsigned long ar_fpsr; /* floating point status (preserved) */
535  unsigned long r15; /* scratch */
536 
537  /* The remaining registers are NOT saved for system calls. */
538  unsigned long r14; /* scratch */
539  unsigned long r2; /* scratch */
540  unsigned long r3; /* scratch */
541  unsigned long r16; /* scratch */
542  unsigned long r17; /* scratch */
543  unsigned long r18; /* scratch */
544  unsigned long r19; /* scratch */
545  unsigned long r20; /* scratch */
546  unsigned long r21; /* scratch */
547  unsigned long r22; /* scratch */
548  unsigned long r23; /* scratch */
549  unsigned long r24; /* scratch */
550  unsigned long r25; /* scratch */
551  unsigned long r26; /* scratch */
552  unsigned long r27; /* scratch */
553  unsigned long r28; /* scratch */
554  unsigned long r29; /* scratch */
555  unsigned long r30; /* scratch */
556  unsigned long r31; /* scratch */
557  unsigned long ar_ccv; /* compare/exchange value (scratch) */
558 
559  /*
560  * Floating point registers that the kernel considers scratch:
561  */
562  struct ia64_fpreg f6; /* scratch */
563  struct ia64_fpreg f7; /* scratch */
564  struct ia64_fpreg f8; /* scratch */
565  struct ia64_fpreg f9; /* scratch */
566  struct ia64_fpreg f10; /* scratch */
567  struct ia64_fpreg f11; /* scratch */
568 
569  unsigned long r4; /* preserved */
570  unsigned long r5; /* preserved */
571  unsigned long r6; /* preserved */
572  unsigned long r7; /* preserved */
573  unsigned long eml_unat; /* used for emulating instruction */
574  unsigned long pad0; /* alignment pad */
575 };
576 
577 static inline struct kvm_pt_regs *vcpu_regs(struct kvm_vcpu *v)
578 {
579  return (struct kvm_pt_regs *) ((unsigned long) v + KVM_STK_OFFSET) - 1;
580 }
581 
582 typedef int kvm_vmm_entry(void);
583 typedef void kvm_tramp_entry(union context *host, union context *guest);
584 
585 struct kvm_vmm_info{
586  struct module *module;
587  kvm_vmm_entry *vmm_entry;
588  kvm_tramp_entry *tramp_entry;
589  unsigned long vmm_ivt;
590  unsigned long patch_mov_ar;
591  unsigned long patch_mov_ar_sn2;
592 };
593 
594 int kvm_highest_pending_irq(struct kvm_vcpu *vcpu);
595 int kvm_emulate_halt(struct kvm_vcpu *vcpu);
596 int kvm_pal_emul(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
597 void kvm_sal_emul(struct kvm_vcpu *vcpu);
598 
599 #define __KVM_HAVE_ARCH_VM_ALLOC 1
600 struct kvm *kvm_arch_alloc_vm(void);
601 void kvm_arch_free_vm(struct kvm *kvm);
602 
603 #endif /* __ASSEMBLY__*/
604 
605 #endif
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