xref: /openbmc/linux/arch/s390/include/asm/kvm_host.h (revision ddc141e5)
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * definition for kernel virtual machines on s390
4  *
5  * Copyright IBM Corp. 2008, 2018
6  *
7  *    Author(s): Carsten Otte <cotte@de.ibm.com>
8  */
9 
10 
11 #ifndef ASM_KVM_HOST_H
12 #define ASM_KVM_HOST_H
13 
14 #include <linux/types.h>
15 #include <linux/hrtimer.h>
16 #include <linux/interrupt.h>
17 #include <linux/kvm_types.h>
18 #include <linux/kvm_host.h>
19 #include <linux/kvm.h>
20 #include <linux/seqlock.h>
21 #include <asm/debug.h>
22 #include <asm/cpu.h>
23 #include <asm/fpu/api.h>
24 #include <asm/isc.h>
25 #include <asm/guarded_storage.h>
26 
27 #define KVM_S390_BSCA_CPU_SLOTS 64
28 #define KVM_S390_ESCA_CPU_SLOTS 248
29 #define KVM_MAX_VCPUS 255
30 #define KVM_USER_MEM_SLOTS 32
31 
32 /*
33  * These seem to be used for allocating ->chip in the routing table,
34  * which we don't use. 4096 is an out-of-thin-air value. If we need
35  * to look at ->chip later on, we'll need to revisit this.
36  */
37 #define KVM_NR_IRQCHIPS 1
38 #define KVM_IRQCHIP_NUM_PINS 4096
39 #define KVM_HALT_POLL_NS_DEFAULT 80000
40 
41 /* s390-specific vcpu->requests bit members */
42 #define KVM_REQ_ENABLE_IBS	KVM_ARCH_REQ(0)
43 #define KVM_REQ_DISABLE_IBS	KVM_ARCH_REQ(1)
44 #define KVM_REQ_ICPT_OPEREXC	KVM_ARCH_REQ(2)
45 #define KVM_REQ_START_MIGRATION KVM_ARCH_REQ(3)
46 #define KVM_REQ_STOP_MIGRATION  KVM_ARCH_REQ(4)
47 
48 #define SIGP_CTRL_C		0x80
49 #define SIGP_CTRL_SCN_MASK	0x3f
50 
51 union bsca_sigp_ctrl {
52 	__u8 value;
53 	struct {
54 		__u8 c : 1;
55 		__u8 r : 1;
56 		__u8 scn : 6;
57 	};
58 };
59 
60 union esca_sigp_ctrl {
61 	__u16 value;
62 	struct {
63 		__u8 c : 1;
64 		__u8 reserved: 7;
65 		__u8 scn;
66 	};
67 };
68 
69 struct esca_entry {
70 	union esca_sigp_ctrl sigp_ctrl;
71 	__u16   reserved1[3];
72 	__u64   sda;
73 	__u64   reserved2[6];
74 };
75 
76 struct bsca_entry {
77 	__u8	reserved0;
78 	union bsca_sigp_ctrl	sigp_ctrl;
79 	__u16	reserved[3];
80 	__u64	sda;
81 	__u64	reserved2[2];
82 };
83 
84 union ipte_control {
85 	unsigned long val;
86 	struct {
87 		unsigned long k  : 1;
88 		unsigned long kh : 31;
89 		unsigned long kg : 32;
90 	};
91 };
92 
93 struct bsca_block {
94 	union ipte_control ipte_control;
95 	__u64	reserved[5];
96 	__u64	mcn;
97 	__u64	reserved2;
98 	struct bsca_entry cpu[KVM_S390_BSCA_CPU_SLOTS];
99 };
100 
101 struct esca_block {
102 	union ipte_control ipte_control;
103 	__u64   reserved1[7];
104 	__u64   mcn[4];
105 	__u64   reserved2[20];
106 	struct esca_entry cpu[KVM_S390_ESCA_CPU_SLOTS];
107 };
108 
109 /*
110  * This struct is used to store some machine check info from lowcore
111  * for machine checks that happen while the guest is running.
112  * This info in host's lowcore might be overwritten by a second machine
113  * check from host when host is in the machine check's high-level handling.
114  * The size is 24 bytes.
115  */
116 struct mcck_volatile_info {
117 	__u64 mcic;
118 	__u64 failing_storage_address;
119 	__u32 ext_damage_code;
120 	__u32 reserved;
121 };
122 
123 #define CPUSTAT_STOPPED    0x80000000
124 #define CPUSTAT_WAIT       0x10000000
125 #define CPUSTAT_ECALL_PEND 0x08000000
126 #define CPUSTAT_STOP_INT   0x04000000
127 #define CPUSTAT_IO_INT     0x02000000
128 #define CPUSTAT_EXT_INT    0x01000000
129 #define CPUSTAT_RUNNING    0x00800000
130 #define CPUSTAT_RETAINED   0x00400000
131 #define CPUSTAT_TIMING_SUB 0x00020000
132 #define CPUSTAT_SIE_SUB    0x00010000
133 #define CPUSTAT_RRF        0x00008000
134 #define CPUSTAT_SLSV       0x00004000
135 #define CPUSTAT_SLSR       0x00002000
136 #define CPUSTAT_ZARCH      0x00000800
137 #define CPUSTAT_MCDS       0x00000100
138 #define CPUSTAT_KSS        0x00000200
139 #define CPUSTAT_SM         0x00000080
140 #define CPUSTAT_IBS        0x00000040
141 #define CPUSTAT_GED2       0x00000010
142 #define CPUSTAT_G          0x00000008
143 #define CPUSTAT_GED        0x00000004
144 #define CPUSTAT_J          0x00000002
145 #define CPUSTAT_P          0x00000001
146 
147 struct kvm_s390_sie_block {
148 	atomic_t cpuflags;		/* 0x0000 */
149 	__u32 : 1;			/* 0x0004 */
150 	__u32 prefix : 18;
151 	__u32 : 1;
152 	__u32 ibc : 12;
153 	__u8	reserved08[4];		/* 0x0008 */
154 #define PROG_IN_SIE (1<<0)
155 	__u32	prog0c;			/* 0x000c */
156 	__u8	reserved10[16];		/* 0x0010 */
157 #define PROG_BLOCK_SIE	(1<<0)
158 #define PROG_REQUEST	(1<<1)
159 	atomic_t prog20;		/* 0x0020 */
160 	__u8	reserved24[4];		/* 0x0024 */
161 	__u64	cputm;			/* 0x0028 */
162 	__u64	ckc;			/* 0x0030 */
163 	__u64	epoch;			/* 0x0038 */
164 	__u32	svcc;			/* 0x0040 */
165 #define LCTL_CR0	0x8000
166 #define LCTL_CR6	0x0200
167 #define LCTL_CR9	0x0040
168 #define LCTL_CR10	0x0020
169 #define LCTL_CR11	0x0010
170 #define LCTL_CR14	0x0002
171 	__u16   lctl;			/* 0x0044 */
172 	__s16	icpua;			/* 0x0046 */
173 #define ICTL_OPEREXC	0x80000000
174 #define ICTL_PINT	0x20000000
175 #define ICTL_LPSW	0x00400000
176 #define ICTL_STCTL	0x00040000
177 #define ICTL_ISKE	0x00004000
178 #define ICTL_SSKE	0x00002000
179 #define ICTL_RRBE	0x00001000
180 #define ICTL_TPROT	0x00000200
181 	__u32	ictl;			/* 0x0048 */
182 #define ECA_CEI		0x80000000
183 #define ECA_IB		0x40000000
184 #define ECA_SIGPI	0x10000000
185 #define ECA_MVPGI	0x01000000
186 #define ECA_AIV		0x00200000
187 #define ECA_VX		0x00020000
188 #define ECA_PROTEXCI	0x00002000
189 #define ECA_SII		0x00000001
190 	__u32	eca;			/* 0x004c */
191 #define ICPT_INST	0x04
192 #define ICPT_PROGI	0x08
193 #define ICPT_INSTPROGI	0x0C
194 #define ICPT_EXTREQ	0x10
195 #define ICPT_EXTINT	0x14
196 #define ICPT_IOREQ	0x18
197 #define ICPT_WAIT	0x1c
198 #define ICPT_VALIDITY	0x20
199 #define ICPT_STOP	0x28
200 #define ICPT_OPEREXC	0x2C
201 #define ICPT_PARTEXEC	0x38
202 #define ICPT_IOINST	0x40
203 #define ICPT_KSS	0x5c
204 	__u8	icptcode;		/* 0x0050 */
205 	__u8	icptstatus;		/* 0x0051 */
206 	__u16	ihcpu;			/* 0x0052 */
207 	__u8	reserved54[2];		/* 0x0054 */
208 	__u16	ipa;			/* 0x0056 */
209 	__u32	ipb;			/* 0x0058 */
210 	__u32	scaoh;			/* 0x005c */
211 #define FPF_BPBC 	0x20
212 	__u8	fpf;			/* 0x0060 */
213 #define ECB_GS		0x40
214 #define ECB_TE		0x10
215 #define ECB_SRSI	0x04
216 #define ECB_HOSTPROTINT	0x02
217 	__u8	ecb;			/* 0x0061 */
218 #define ECB2_CMMA	0x80
219 #define ECB2_IEP	0x20
220 #define ECB2_PFMFI	0x08
221 #define ECB2_ESCA	0x04
222 	__u8    ecb2;                   /* 0x0062 */
223 #define ECB3_DEA 0x08
224 #define ECB3_AES 0x04
225 #define ECB3_RI  0x01
226 	__u8    ecb3;			/* 0x0063 */
227 	__u32	scaol;			/* 0x0064 */
228 	__u8	reserved68;		/* 0x0068 */
229 	__u8    epdx;			/* 0x0069 */
230 	__u8    reserved6a[2];		/* 0x006a */
231 	__u32	todpr;			/* 0x006c */
232 #define GISA_FORMAT1 0x00000001
233 	__u32	gd;			/* 0x0070 */
234 	__u8	reserved74[12];		/* 0x0074 */
235 	__u64	mso;			/* 0x0080 */
236 	__u64	msl;			/* 0x0088 */
237 	psw_t	gpsw;			/* 0x0090 */
238 	__u64	gg14;			/* 0x00a0 */
239 	__u64	gg15;			/* 0x00a8 */
240 	__u8	reservedb0[20];		/* 0x00b0 */
241 	__u16	extcpuaddr;		/* 0x00c4 */
242 	__u16	eic;			/* 0x00c6 */
243 	__u32	reservedc8;		/* 0x00c8 */
244 	__u16	pgmilc;			/* 0x00cc */
245 	__u16	iprcc;			/* 0x00ce */
246 	__u32	dxc;			/* 0x00d0 */
247 	__u16	mcn;			/* 0x00d4 */
248 	__u8	perc;			/* 0x00d6 */
249 	__u8	peratmid;		/* 0x00d7 */
250 	__u64	peraddr;		/* 0x00d8 */
251 	__u8	eai;			/* 0x00e0 */
252 	__u8	peraid;			/* 0x00e1 */
253 	__u8	oai;			/* 0x00e2 */
254 	__u8	armid;			/* 0x00e3 */
255 	__u8	reservede4[4];		/* 0x00e4 */
256 	__u64	tecmc;			/* 0x00e8 */
257 	__u8	reservedf0[12];		/* 0x00f0 */
258 #define CRYCB_FORMAT1 0x00000001
259 #define CRYCB_FORMAT2 0x00000003
260 	__u32	crycbd;			/* 0x00fc */
261 	__u64	gcr[16];		/* 0x0100 */
262 	__u64	gbea;			/* 0x0180 */
263 	__u8    reserved188[8];		/* 0x0188 */
264 	__u64   sdnxo;			/* 0x0190 */
265 	__u8    reserved198[8];		/* 0x0198 */
266 	__u32	fac;			/* 0x01a0 */
267 	__u8	reserved1a4[20];	/* 0x01a4 */
268 	__u64	cbrlo;			/* 0x01b8 */
269 	__u8	reserved1c0[8];		/* 0x01c0 */
270 #define ECD_HOSTREGMGMT	0x20000000
271 #define ECD_MEF		0x08000000
272 	__u32	ecd;			/* 0x01c8 */
273 	__u8	reserved1cc[18];	/* 0x01cc */
274 	__u64	pp;			/* 0x01de */
275 	__u8	reserved1e6[2];		/* 0x01e6 */
276 	__u64	itdba;			/* 0x01e8 */
277 	__u64   riccbd;			/* 0x01f0 */
278 	__u64	gvrd;			/* 0x01f8 */
279 } __attribute__((packed));
280 
281 struct kvm_s390_itdb {
282 	__u8	data[256];
283 };
284 
285 struct sie_page {
286 	struct kvm_s390_sie_block sie_block;
287 	struct mcck_volatile_info mcck_info;	/* 0x0200 */
288 	__u8 reserved218[1000];		/* 0x0218 */
289 	struct kvm_s390_itdb itdb;	/* 0x0600 */
290 	__u8 reserved700[2304];		/* 0x0700 */
291 };
292 
293 struct kvm_vcpu_stat {
294 	u64 exit_userspace;
295 	u64 exit_null;
296 	u64 exit_external_request;
297 	u64 exit_external_interrupt;
298 	u64 exit_stop_request;
299 	u64 exit_validity;
300 	u64 exit_instruction;
301 	u64 exit_pei;
302 	u64 halt_successful_poll;
303 	u64 halt_attempted_poll;
304 	u64 halt_poll_invalid;
305 	u64 halt_wakeup;
306 	u64 instruction_lctl;
307 	u64 instruction_lctlg;
308 	u64 instruction_stctl;
309 	u64 instruction_stctg;
310 	u64 exit_program_interruption;
311 	u64 exit_instr_and_program;
312 	u64 exit_operation_exception;
313 	u64 deliver_external_call;
314 	u64 deliver_emergency_signal;
315 	u64 deliver_service_signal;
316 	u64 deliver_virtio_interrupt;
317 	u64 deliver_stop_signal;
318 	u64 deliver_prefix_signal;
319 	u64 deliver_restart_signal;
320 	u64 deliver_program_int;
321 	u64 deliver_io_int;
322 	u64 exit_wait_state;
323 	u64 instruction_epsw;
324 	u64 instruction_gs;
325 	u64 instruction_io_other;
326 	u64 instruction_lpsw;
327 	u64 instruction_lpswe;
328 	u64 instruction_pfmf;
329 	u64 instruction_ptff;
330 	u64 instruction_sck;
331 	u64 instruction_sckpf;
332 	u64 instruction_stidp;
333 	u64 instruction_spx;
334 	u64 instruction_stpx;
335 	u64 instruction_stap;
336 	u64 instruction_iske;
337 	u64 instruction_ri;
338 	u64 instruction_rrbe;
339 	u64 instruction_sske;
340 	u64 instruction_ipte_interlock;
341 	u64 instruction_stsi;
342 	u64 instruction_stfl;
343 	u64 instruction_tb;
344 	u64 instruction_tpi;
345 	u64 instruction_tprot;
346 	u64 instruction_tsch;
347 	u64 instruction_sie;
348 	u64 instruction_essa;
349 	u64 instruction_sthyi;
350 	u64 instruction_sigp_sense;
351 	u64 instruction_sigp_sense_running;
352 	u64 instruction_sigp_external_call;
353 	u64 instruction_sigp_emergency;
354 	u64 instruction_sigp_cond_emergency;
355 	u64 instruction_sigp_start;
356 	u64 instruction_sigp_stop;
357 	u64 instruction_sigp_stop_store_status;
358 	u64 instruction_sigp_store_status;
359 	u64 instruction_sigp_store_adtl_status;
360 	u64 instruction_sigp_arch;
361 	u64 instruction_sigp_prefix;
362 	u64 instruction_sigp_restart;
363 	u64 instruction_sigp_init_cpu_reset;
364 	u64 instruction_sigp_cpu_reset;
365 	u64 instruction_sigp_unknown;
366 	u64 diagnose_10;
367 	u64 diagnose_44;
368 	u64 diagnose_9c;
369 	u64 diagnose_258;
370 	u64 diagnose_308;
371 	u64 diagnose_500;
372 	u64 diagnose_other;
373 };
374 
375 #define PGM_OPERATION			0x01
376 #define PGM_PRIVILEGED_OP		0x02
377 #define PGM_EXECUTE			0x03
378 #define PGM_PROTECTION			0x04
379 #define PGM_ADDRESSING			0x05
380 #define PGM_SPECIFICATION		0x06
381 #define PGM_DATA			0x07
382 #define PGM_FIXED_POINT_OVERFLOW	0x08
383 #define PGM_FIXED_POINT_DIVIDE		0x09
384 #define PGM_DECIMAL_OVERFLOW		0x0a
385 #define PGM_DECIMAL_DIVIDE		0x0b
386 #define PGM_HFP_EXPONENT_OVERFLOW	0x0c
387 #define PGM_HFP_EXPONENT_UNDERFLOW	0x0d
388 #define PGM_HFP_SIGNIFICANCE		0x0e
389 #define PGM_HFP_DIVIDE			0x0f
390 #define PGM_SEGMENT_TRANSLATION		0x10
391 #define PGM_PAGE_TRANSLATION		0x11
392 #define PGM_TRANSLATION_SPEC		0x12
393 #define PGM_SPECIAL_OPERATION		0x13
394 #define PGM_OPERAND			0x15
395 #define PGM_TRACE_TABEL			0x16
396 #define PGM_VECTOR_PROCESSING		0x1b
397 #define PGM_SPACE_SWITCH		0x1c
398 #define PGM_HFP_SQUARE_ROOT		0x1d
399 #define PGM_PC_TRANSLATION_SPEC		0x1f
400 #define PGM_AFX_TRANSLATION		0x20
401 #define PGM_ASX_TRANSLATION		0x21
402 #define PGM_LX_TRANSLATION		0x22
403 #define PGM_EX_TRANSLATION		0x23
404 #define PGM_PRIMARY_AUTHORITY		0x24
405 #define PGM_SECONDARY_AUTHORITY		0x25
406 #define PGM_LFX_TRANSLATION		0x26
407 #define PGM_LSX_TRANSLATION		0x27
408 #define PGM_ALET_SPECIFICATION		0x28
409 #define PGM_ALEN_TRANSLATION		0x29
410 #define PGM_ALE_SEQUENCE		0x2a
411 #define PGM_ASTE_VALIDITY		0x2b
412 #define PGM_ASTE_SEQUENCE		0x2c
413 #define PGM_EXTENDED_AUTHORITY		0x2d
414 #define PGM_LSTE_SEQUENCE		0x2e
415 #define PGM_ASTE_INSTANCE		0x2f
416 #define PGM_STACK_FULL			0x30
417 #define PGM_STACK_EMPTY			0x31
418 #define PGM_STACK_SPECIFICATION		0x32
419 #define PGM_STACK_TYPE			0x33
420 #define PGM_STACK_OPERATION		0x34
421 #define PGM_ASCE_TYPE			0x38
422 #define PGM_REGION_FIRST_TRANS		0x39
423 #define PGM_REGION_SECOND_TRANS		0x3a
424 #define PGM_REGION_THIRD_TRANS		0x3b
425 #define PGM_MONITOR			0x40
426 #define PGM_PER				0x80
427 #define PGM_CRYPTO_OPERATION		0x119
428 
429 /* irq types in ascend order of priorities */
430 enum irq_types {
431 	IRQ_PEND_SET_PREFIX = 0,
432 	IRQ_PEND_RESTART,
433 	IRQ_PEND_SIGP_STOP,
434 	IRQ_PEND_IO_ISC_7,
435 	IRQ_PEND_IO_ISC_6,
436 	IRQ_PEND_IO_ISC_5,
437 	IRQ_PEND_IO_ISC_4,
438 	IRQ_PEND_IO_ISC_3,
439 	IRQ_PEND_IO_ISC_2,
440 	IRQ_PEND_IO_ISC_1,
441 	IRQ_PEND_IO_ISC_0,
442 	IRQ_PEND_VIRTIO,
443 	IRQ_PEND_PFAULT_DONE,
444 	IRQ_PEND_PFAULT_INIT,
445 	IRQ_PEND_EXT_HOST,
446 	IRQ_PEND_EXT_SERVICE,
447 	IRQ_PEND_EXT_TIMING,
448 	IRQ_PEND_EXT_CPU_TIMER,
449 	IRQ_PEND_EXT_CLOCK_COMP,
450 	IRQ_PEND_EXT_EXTERNAL,
451 	IRQ_PEND_EXT_EMERGENCY,
452 	IRQ_PEND_EXT_MALFUNC,
453 	IRQ_PEND_EXT_IRQ_KEY,
454 	IRQ_PEND_MCHK_REP,
455 	IRQ_PEND_PROG,
456 	IRQ_PEND_SVC,
457 	IRQ_PEND_MCHK_EX,
458 	IRQ_PEND_COUNT
459 };
460 
461 /* We have 2M for virtio device descriptor pages. Smallest amount of
462  * memory per page is 24 bytes (1 queue), so (2048*1024) / 24 = 87381
463  */
464 #define KVM_S390_MAX_VIRTIO_IRQS 87381
465 
466 /*
467  * Repressible (non-floating) machine check interrupts
468  * subclass bits in MCIC
469  */
470 #define MCHK_EXTD_BIT 58
471 #define MCHK_DEGR_BIT 56
472 #define MCHK_WARN_BIT 55
473 #define MCHK_REP_MASK ((1UL << MCHK_DEGR_BIT) | \
474 		       (1UL << MCHK_EXTD_BIT) | \
475 		       (1UL << MCHK_WARN_BIT))
476 
477 /* Exigent machine check interrupts subclass bits in MCIC */
478 #define MCHK_SD_BIT 63
479 #define MCHK_PD_BIT 62
480 #define MCHK_EX_MASK ((1UL << MCHK_SD_BIT) | (1UL << MCHK_PD_BIT))
481 
482 #define IRQ_PEND_EXT_MASK ((1UL << IRQ_PEND_EXT_IRQ_KEY)    | \
483 			   (1UL << IRQ_PEND_EXT_CLOCK_COMP) | \
484 			   (1UL << IRQ_PEND_EXT_CPU_TIMER)  | \
485 			   (1UL << IRQ_PEND_EXT_MALFUNC)    | \
486 			   (1UL << IRQ_PEND_EXT_EMERGENCY)  | \
487 			   (1UL << IRQ_PEND_EXT_EXTERNAL)   | \
488 			   (1UL << IRQ_PEND_EXT_TIMING)     | \
489 			   (1UL << IRQ_PEND_EXT_HOST)       | \
490 			   (1UL << IRQ_PEND_EXT_SERVICE)    | \
491 			   (1UL << IRQ_PEND_VIRTIO)         | \
492 			   (1UL << IRQ_PEND_PFAULT_INIT)    | \
493 			   (1UL << IRQ_PEND_PFAULT_DONE))
494 
495 #define IRQ_PEND_IO_MASK ((1UL << IRQ_PEND_IO_ISC_0) | \
496 			  (1UL << IRQ_PEND_IO_ISC_1) | \
497 			  (1UL << IRQ_PEND_IO_ISC_2) | \
498 			  (1UL << IRQ_PEND_IO_ISC_3) | \
499 			  (1UL << IRQ_PEND_IO_ISC_4) | \
500 			  (1UL << IRQ_PEND_IO_ISC_5) | \
501 			  (1UL << IRQ_PEND_IO_ISC_6) | \
502 			  (1UL << IRQ_PEND_IO_ISC_7))
503 
504 #define IRQ_PEND_MCHK_MASK ((1UL << IRQ_PEND_MCHK_REP) | \
505 			    (1UL << IRQ_PEND_MCHK_EX))
506 
507 struct kvm_s390_interrupt_info {
508 	struct list_head list;
509 	u64	type;
510 	union {
511 		struct kvm_s390_io_info io;
512 		struct kvm_s390_ext_info ext;
513 		struct kvm_s390_pgm_info pgm;
514 		struct kvm_s390_emerg_info emerg;
515 		struct kvm_s390_extcall_info extcall;
516 		struct kvm_s390_prefix_info prefix;
517 		struct kvm_s390_stop_info stop;
518 		struct kvm_s390_mchk_info mchk;
519 	};
520 };
521 
522 struct kvm_s390_irq_payload {
523 	struct kvm_s390_io_info io;
524 	struct kvm_s390_ext_info ext;
525 	struct kvm_s390_pgm_info pgm;
526 	struct kvm_s390_emerg_info emerg;
527 	struct kvm_s390_extcall_info extcall;
528 	struct kvm_s390_prefix_info prefix;
529 	struct kvm_s390_stop_info stop;
530 	struct kvm_s390_mchk_info mchk;
531 };
532 
533 struct kvm_s390_local_interrupt {
534 	spinlock_t lock;
535 	DECLARE_BITMAP(sigp_emerg_pending, KVM_MAX_VCPUS);
536 	struct kvm_s390_irq_payload irq;
537 	unsigned long pending_irqs;
538 };
539 
540 #define FIRQ_LIST_IO_ISC_0 0
541 #define FIRQ_LIST_IO_ISC_1 1
542 #define FIRQ_LIST_IO_ISC_2 2
543 #define FIRQ_LIST_IO_ISC_3 3
544 #define FIRQ_LIST_IO_ISC_4 4
545 #define FIRQ_LIST_IO_ISC_5 5
546 #define FIRQ_LIST_IO_ISC_6 6
547 #define FIRQ_LIST_IO_ISC_7 7
548 #define FIRQ_LIST_PFAULT   8
549 #define FIRQ_LIST_VIRTIO   9
550 #define FIRQ_LIST_COUNT   10
551 #define FIRQ_CNTR_IO       0
552 #define FIRQ_CNTR_SERVICE  1
553 #define FIRQ_CNTR_VIRTIO   2
554 #define FIRQ_CNTR_PFAULT   3
555 #define FIRQ_MAX_COUNT     4
556 
557 /* mask the AIS mode for a given ISC */
558 #define AIS_MODE_MASK(isc) (0x80 >> isc)
559 
560 #define KVM_S390_AIS_MODE_ALL    0
561 #define KVM_S390_AIS_MODE_SINGLE 1
562 
563 struct kvm_s390_float_interrupt {
564 	unsigned long pending_irqs;
565 	spinlock_t lock;
566 	struct list_head lists[FIRQ_LIST_COUNT];
567 	int counters[FIRQ_MAX_COUNT];
568 	struct kvm_s390_mchk_info mchk;
569 	struct kvm_s390_ext_info srv_signal;
570 	int next_rr_cpu;
571 	unsigned long idle_mask[BITS_TO_LONGS(KVM_MAX_VCPUS)];
572 	struct mutex ais_lock;
573 	u8 simm;
574 	u8 nimm;
575 };
576 
577 struct kvm_hw_wp_info_arch {
578 	unsigned long addr;
579 	unsigned long phys_addr;
580 	int len;
581 	char *old_data;
582 };
583 
584 struct kvm_hw_bp_info_arch {
585 	unsigned long addr;
586 	int len;
587 };
588 
589 /*
590  * Only the upper 16 bits of kvm_guest_debug->control are arch specific.
591  * Further KVM_GUESTDBG flags which an be used from userspace can be found in
592  * arch/s390/include/uapi/asm/kvm.h
593  */
594 #define KVM_GUESTDBG_EXIT_PENDING 0x10000000
595 
596 #define guestdbg_enabled(vcpu) \
597 		(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)
598 #define guestdbg_sstep_enabled(vcpu) \
599 		(vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
600 #define guestdbg_hw_bp_enabled(vcpu) \
601 		(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
602 #define guestdbg_exit_pending(vcpu) (guestdbg_enabled(vcpu) && \
603 		(vcpu->guest_debug & KVM_GUESTDBG_EXIT_PENDING))
604 
605 struct kvm_guestdbg_info_arch {
606 	unsigned long cr0;
607 	unsigned long cr9;
608 	unsigned long cr10;
609 	unsigned long cr11;
610 	struct kvm_hw_bp_info_arch *hw_bp_info;
611 	struct kvm_hw_wp_info_arch *hw_wp_info;
612 	int nr_hw_bp;
613 	int nr_hw_wp;
614 	unsigned long last_bp;
615 };
616 
617 struct kvm_vcpu_arch {
618 	struct kvm_s390_sie_block *sie_block;
619 	/* if vsie is active, currently executed shadow sie control block */
620 	struct kvm_s390_sie_block *vsie_block;
621 	unsigned int      host_acrs[NUM_ACRS];
622 	struct gs_cb      *host_gscb;
623 	struct fpu	  host_fpregs;
624 	struct kvm_s390_local_interrupt local_int;
625 	struct hrtimer    ckc_timer;
626 	struct kvm_s390_pgm_info pgm;
627 	struct gmap *gmap;
628 	/* backup location for the currently enabled gmap when scheduled out */
629 	struct gmap *enabled_gmap;
630 	struct kvm_guestdbg_info_arch guestdbg;
631 	unsigned long pfault_token;
632 	unsigned long pfault_select;
633 	unsigned long pfault_compare;
634 	bool cputm_enabled;
635 	/*
636 	 * The seqcount protects updates to cputm_start and sie_block.cputm,
637 	 * this way we can have non-blocking reads with consistent values.
638 	 * Only the owning VCPU thread (vcpu->cpu) is allowed to change these
639 	 * values and to start/stop/enable/disable cpu timer accounting.
640 	 */
641 	seqcount_t cputm_seqcount;
642 	__u64 cputm_start;
643 	bool gs_enabled;
644 };
645 
646 struct kvm_vm_stat {
647 	ulong remote_tlb_flush;
648 };
649 
650 struct kvm_arch_memory_slot {
651 };
652 
653 struct s390_map_info {
654 	struct list_head list;
655 	__u64 guest_addr;
656 	__u64 addr;
657 	struct page *page;
658 };
659 
660 struct s390_io_adapter {
661 	unsigned int id;
662 	int isc;
663 	bool maskable;
664 	bool masked;
665 	bool swap;
666 	bool suppressible;
667 	struct rw_semaphore maps_lock;
668 	struct list_head maps;
669 	atomic_t nr_maps;
670 };
671 
672 #define MAX_S390_IO_ADAPTERS ((MAX_ISC + 1) * 8)
673 #define MAX_S390_ADAPTER_MAPS 256
674 
675 /* maximum size of facilities and facility mask is 2k bytes */
676 #define S390_ARCH_FAC_LIST_SIZE_BYTE (1<<11)
677 #define S390_ARCH_FAC_LIST_SIZE_U64 \
678 	(S390_ARCH_FAC_LIST_SIZE_BYTE / sizeof(u64))
679 #define S390_ARCH_FAC_MASK_SIZE_BYTE S390_ARCH_FAC_LIST_SIZE_BYTE
680 #define S390_ARCH_FAC_MASK_SIZE_U64 \
681 	(S390_ARCH_FAC_MASK_SIZE_BYTE / sizeof(u64))
682 
683 struct kvm_s390_cpu_model {
684 	/* facility mask supported by kvm & hosting machine */
685 	__u64 fac_mask[S390_ARCH_FAC_LIST_SIZE_U64];
686 	/* facility list requested by guest (in dma page) */
687 	__u64 *fac_list;
688 	u64 cpuid;
689 	unsigned short ibc;
690 };
691 
692 struct kvm_s390_crypto {
693 	struct kvm_s390_crypto_cb *crycb;
694 	__u32 crycbd;
695 	__u8 aes_kw;
696 	__u8 dea_kw;
697 };
698 
699 #define APCB0_MASK_SIZE 1
700 struct kvm_s390_apcb0 {
701 	__u64 apm[APCB0_MASK_SIZE];		/* 0x0000 */
702 	__u64 aqm[APCB0_MASK_SIZE];		/* 0x0008 */
703 	__u64 adm[APCB0_MASK_SIZE];		/* 0x0010 */
704 	__u64 reserved18;			/* 0x0018 */
705 };
706 
707 #define APCB1_MASK_SIZE 4
708 struct kvm_s390_apcb1 {
709 	__u64 apm[APCB1_MASK_SIZE];		/* 0x0000 */
710 	__u64 aqm[APCB1_MASK_SIZE];		/* 0x0020 */
711 	__u64 adm[APCB1_MASK_SIZE];		/* 0x0040 */
712 	__u64 reserved60[4];			/* 0x0060 */
713 };
714 
715 struct kvm_s390_crypto_cb {
716 	struct kvm_s390_apcb0 apcb0;		/* 0x0000 */
717 	__u8   reserved20[0x0048 - 0x0020];	/* 0x0020 */
718 	__u8   dea_wrapping_key_mask[24];	/* 0x0048 */
719 	__u8   aes_wrapping_key_mask[32];	/* 0x0060 */
720 	struct kvm_s390_apcb1 apcb1;		/* 0x0080 */
721 };
722 
723 struct kvm_s390_gisa {
724 	union {
725 		struct { /* common to all formats */
726 			u32 next_alert;
727 			u8  ipm;
728 			u8  reserved01[2];
729 			u8  iam;
730 		};
731 		struct { /* format 0 */
732 			u32 next_alert;
733 			u8  ipm;
734 			u8  reserved01;
735 			u8  : 6;
736 			u8  g : 1;
737 			u8  c : 1;
738 			u8  iam;
739 			u8  reserved02[4];
740 			u32 airq_count;
741 		} g0;
742 		struct { /* format 1 */
743 			u32 next_alert;
744 			u8  ipm;
745 			u8  simm;
746 			u8  nimm;
747 			u8  iam;
748 			u8  aism[8];
749 			u8  : 6;
750 			u8  g : 1;
751 			u8  c : 1;
752 			u8  reserved03[11];
753 			u32 airq_count;
754 		} g1;
755 	};
756 };
757 
758 /*
759  * sie_page2 has to be allocated as DMA because fac_list, crycb and
760  * gisa need 31bit addresses in the sie control block.
761  */
762 struct sie_page2 {
763 	__u64 fac_list[S390_ARCH_FAC_LIST_SIZE_U64];	/* 0x0000 */
764 	struct kvm_s390_crypto_cb crycb;		/* 0x0800 */
765 	struct kvm_s390_gisa gisa;			/* 0x0900 */
766 	u8 reserved920[0x1000 - 0x920];			/* 0x0920 */
767 };
768 
769 struct kvm_s390_vsie {
770 	struct mutex mutex;
771 	struct radix_tree_root addr_to_page;
772 	int page_count;
773 	int next;
774 	struct page *pages[KVM_MAX_VCPUS];
775 };
776 
777 struct kvm_s390_migration_state {
778 	unsigned long bitmap_size;	/* in bits (number of guest pages) */
779 	atomic64_t dirty_pages;		/* number of dirty pages */
780 	unsigned long *pgste_bitmap;
781 };
782 
783 struct kvm_arch{
784 	void *sca;
785 	int use_esca;
786 	rwlock_t sca_lock;
787 	debug_info_t *dbf;
788 	struct kvm_s390_float_interrupt float_int;
789 	struct kvm_device *flic;
790 	struct gmap *gmap;
791 	unsigned long mem_limit;
792 	int css_support;
793 	int use_irqchip;
794 	int use_cmma;
795 	int user_cpu_state_ctrl;
796 	int user_sigp;
797 	int user_stsi;
798 	int user_instr0;
799 	struct s390_io_adapter *adapters[MAX_S390_IO_ADAPTERS];
800 	wait_queue_head_t ipte_wq;
801 	int ipte_lock_count;
802 	struct mutex ipte_mutex;
803 	spinlock_t start_stop_lock;
804 	struct sie_page2 *sie_page2;
805 	struct kvm_s390_cpu_model model;
806 	struct kvm_s390_crypto crypto;
807 	struct kvm_s390_vsie vsie;
808 	u8 epdx;
809 	u64 epoch;
810 	struct kvm_s390_migration_state *migration_state;
811 	/* subset of available cpu features enabled by user space */
812 	DECLARE_BITMAP(cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS);
813 	struct kvm_s390_gisa *gisa;
814 };
815 
816 #define KVM_HVA_ERR_BAD		(-1UL)
817 #define KVM_HVA_ERR_RO_BAD	(-2UL)
818 
819 static inline bool kvm_is_error_hva(unsigned long addr)
820 {
821 	return IS_ERR_VALUE(addr);
822 }
823 
824 #define ASYNC_PF_PER_VCPU	64
825 struct kvm_arch_async_pf {
826 	unsigned long pfault_token;
827 };
828 
829 bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu);
830 
831 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
832 			       struct kvm_async_pf *work);
833 
834 void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
835 				     struct kvm_async_pf *work);
836 
837 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
838 				 struct kvm_async_pf *work);
839 
840 extern int sie64a(struct kvm_s390_sie_block *, u64 *);
841 extern char sie_exit;
842 
843 static inline void kvm_arch_hardware_disable(void) {}
844 static inline void kvm_arch_check_processor_compat(void *rtn) {}
845 static inline void kvm_arch_sync_events(struct kvm *kvm) {}
846 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
847 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
848 static inline void kvm_arch_free_memslot(struct kvm *kvm,
849 		struct kvm_memory_slot *free, struct kvm_memory_slot *dont) {}
850 static inline void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots) {}
851 static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {}
852 static inline void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
853 		struct kvm_memory_slot *slot) {}
854 static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
855 static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
856 
857 void kvm_arch_vcpu_block_finish(struct kvm_vcpu *vcpu);
858 
859 #endif
860