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 <linux/module.h>
22 #include <asm/debug.h>
23 #include <asm/cpu.h>
24 #include <asm/fpu/api.h>
25 #include <asm/isc.h>
26 #include <asm/guarded_storage.h>
27 
28 #define KVM_S390_BSCA_CPU_SLOTS 64
29 #define KVM_S390_ESCA_CPU_SLOTS 248
30 #define KVM_MAX_VCPUS 255
31 
32 /*
33  * These seem to be used for allocating ->chip in the routing table, which we
34  * don't use. 1 is as small as we can get to reduce the needed memory. If we
35  * need 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 1
39 #define KVM_HALT_POLL_NS_DEFAULT 50000
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 #define KVM_REQ_VSIE_RESTART	KVM_ARCH_REQ(5)
48 #define KVM_REQ_REFRESH_GUEST_PREFIX	\
49 	KVM_ARCH_REQ_FLAGS(6, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
50 
51 #define SIGP_CTRL_C		0x80
52 #define SIGP_CTRL_SCN_MASK	0x3f
53 
54 union bsca_sigp_ctrl {
55 	__u8 value;
56 	struct {
57 		__u8 c : 1;
58 		__u8 r : 1;
59 		__u8 scn : 6;
60 	};
61 };
62 
63 union esca_sigp_ctrl {
64 	__u16 value;
65 	struct {
66 		__u8 c : 1;
67 		__u8 reserved: 7;
68 		__u8 scn;
69 	};
70 };
71 
72 struct esca_entry {
73 	union esca_sigp_ctrl sigp_ctrl;
74 	__u16   reserved1[3];
75 	__u64   sda;
76 	__u64   reserved2[6];
77 };
78 
79 struct bsca_entry {
80 	__u8	reserved0;
81 	union bsca_sigp_ctrl	sigp_ctrl;
82 	__u16	reserved[3];
83 	__u64	sda;
84 	__u64	reserved2[2];
85 };
86 
87 union ipte_control {
88 	unsigned long val;
89 	struct {
90 		unsigned long k  : 1;
91 		unsigned long kh : 31;
92 		unsigned long kg : 32;
93 	};
94 };
95 
96 struct bsca_block {
97 	union ipte_control ipte_control;
98 	__u64	reserved[5];
99 	__u64	mcn;
100 	__u64	reserved2;
101 	struct bsca_entry cpu[KVM_S390_BSCA_CPU_SLOTS];
102 };
103 
104 struct esca_block {
105 	union ipte_control ipte_control;
106 	__u64   reserved1[7];
107 	__u64   mcn[4];
108 	__u64   reserved2[20];
109 	struct esca_entry cpu[KVM_S390_ESCA_CPU_SLOTS];
110 };
111 
112 /*
113  * This struct is used to store some machine check info from lowcore
114  * for machine checks that happen while the guest is running.
115  * This info in host's lowcore might be overwritten by a second machine
116  * check from host when host is in the machine check's high-level handling.
117  * The size is 24 bytes.
118  */
119 struct mcck_volatile_info {
120 	__u64 mcic;
121 	__u64 failing_storage_address;
122 	__u32 ext_damage_code;
123 	__u32 reserved;
124 };
125 
126 #define CR0_INITIAL_MASK (CR0_UNUSED_56 | CR0_INTERRUPT_KEY_SUBMASK | \
127 			  CR0_MEASUREMENT_ALERT_SUBMASK)
128 #define CR14_INITIAL_MASK (CR14_UNUSED_32 | CR14_UNUSED_33 | \
129 			   CR14_EXTERNAL_DAMAGE_SUBMASK)
130 
131 #define SIDAD_SIZE_MASK		0xff
132 #define sida_origin(sie_block) \
133 	((sie_block)->sidad & PAGE_MASK)
134 #define sida_size(sie_block) \
135 	((((sie_block)->sidad & SIDAD_SIZE_MASK) + 1) * PAGE_SIZE)
136 
137 #define CPUSTAT_STOPPED    0x80000000
138 #define CPUSTAT_WAIT       0x10000000
139 #define CPUSTAT_ECALL_PEND 0x08000000
140 #define CPUSTAT_STOP_INT   0x04000000
141 #define CPUSTAT_IO_INT     0x02000000
142 #define CPUSTAT_EXT_INT    0x01000000
143 #define CPUSTAT_RUNNING    0x00800000
144 #define CPUSTAT_RETAINED   0x00400000
145 #define CPUSTAT_TIMING_SUB 0x00020000
146 #define CPUSTAT_SIE_SUB    0x00010000
147 #define CPUSTAT_RRF        0x00008000
148 #define CPUSTAT_SLSV       0x00004000
149 #define CPUSTAT_SLSR       0x00002000
150 #define CPUSTAT_ZARCH      0x00000800
151 #define CPUSTAT_MCDS       0x00000100
152 #define CPUSTAT_KSS        0x00000200
153 #define CPUSTAT_SM         0x00000080
154 #define CPUSTAT_IBS        0x00000040
155 #define CPUSTAT_GED2       0x00000010
156 #define CPUSTAT_G          0x00000008
157 #define CPUSTAT_GED        0x00000004
158 #define CPUSTAT_J          0x00000002
159 #define CPUSTAT_P          0x00000001
160 
161 struct kvm_s390_sie_block {
162 	atomic_t cpuflags;		/* 0x0000 */
163 	__u32 : 1;			/* 0x0004 */
164 	__u32 prefix : 18;
165 	__u32 : 1;
166 	__u32 ibc : 12;
167 	__u8	reserved08[4];		/* 0x0008 */
168 #define PROG_IN_SIE (1<<0)
169 	__u32	prog0c;			/* 0x000c */
170 	union {
171 		__u8	reserved10[16];		/* 0x0010 */
172 		struct {
173 			__u64	pv_handle_cpu;
174 			__u64	pv_handle_config;
175 		};
176 	};
177 #define PROG_BLOCK_SIE	(1<<0)
178 #define PROG_REQUEST	(1<<1)
179 	atomic_t prog20;		/* 0x0020 */
180 	__u8	reserved24[4];		/* 0x0024 */
181 	__u64	cputm;			/* 0x0028 */
182 	__u64	ckc;			/* 0x0030 */
183 	__u64	epoch;			/* 0x0038 */
184 	__u32	svcc;			/* 0x0040 */
185 #define LCTL_CR0	0x8000
186 #define LCTL_CR6	0x0200
187 #define LCTL_CR9	0x0040
188 #define LCTL_CR10	0x0020
189 #define LCTL_CR11	0x0010
190 #define LCTL_CR14	0x0002
191 	__u16   lctl;			/* 0x0044 */
192 	__s16	icpua;			/* 0x0046 */
193 #define ICTL_OPEREXC	0x80000000
194 #define ICTL_PINT	0x20000000
195 #define ICTL_LPSW	0x00400000
196 #define ICTL_STCTL	0x00040000
197 #define ICTL_ISKE	0x00004000
198 #define ICTL_SSKE	0x00002000
199 #define ICTL_RRBE	0x00001000
200 #define ICTL_TPROT	0x00000200
201 	__u32	ictl;			/* 0x0048 */
202 #define ECA_CEI		0x80000000
203 #define ECA_IB		0x40000000
204 #define ECA_SIGPI	0x10000000
205 #define ECA_MVPGI	0x01000000
206 #define ECA_AIV		0x00200000
207 #define ECA_VX		0x00020000
208 #define ECA_PROTEXCI	0x00002000
209 #define ECA_APIE	0x00000008
210 #define ECA_SII		0x00000001
211 	__u32	eca;			/* 0x004c */
212 #define ICPT_INST	0x04
213 #define ICPT_PROGI	0x08
214 #define ICPT_INSTPROGI	0x0C
215 #define ICPT_EXTREQ	0x10
216 #define ICPT_EXTINT	0x14
217 #define ICPT_IOREQ	0x18
218 #define ICPT_WAIT	0x1c
219 #define ICPT_VALIDITY	0x20
220 #define ICPT_STOP	0x28
221 #define ICPT_OPEREXC	0x2C
222 #define ICPT_PARTEXEC	0x38
223 #define ICPT_IOINST	0x40
224 #define ICPT_KSS	0x5c
225 #define ICPT_MCHKREQ	0x60
226 #define ICPT_INT_ENABLE	0x64
227 #define ICPT_PV_INSTR	0x68
228 #define ICPT_PV_NOTIFY	0x6c
229 #define ICPT_PV_PREF	0x70
230 	__u8	icptcode;		/* 0x0050 */
231 	__u8	icptstatus;		/* 0x0051 */
232 	__u16	ihcpu;			/* 0x0052 */
233 	__u8	reserved54;		/* 0x0054 */
234 #define IICTL_CODE_NONE		 0x00
235 #define IICTL_CODE_MCHK		 0x01
236 #define IICTL_CODE_EXT		 0x02
237 #define IICTL_CODE_IO		 0x03
238 #define IICTL_CODE_RESTART	 0x04
239 #define IICTL_CODE_SPECIFICATION 0x10
240 #define IICTL_CODE_OPERAND	 0x11
241 	__u8	iictl;			/* 0x0055 */
242 	__u16	ipa;			/* 0x0056 */
243 	__u32	ipb;			/* 0x0058 */
244 	__u32	scaoh;			/* 0x005c */
245 #define FPF_BPBC 	0x20
246 	__u8	fpf;			/* 0x0060 */
247 #define ECB_GS		0x40
248 #define ECB_TE		0x10
249 #define ECB_SPECI	0x08
250 #define ECB_SRSI	0x04
251 #define ECB_HOSTPROTINT	0x02
252 	__u8	ecb;			/* 0x0061 */
253 #define ECB2_CMMA	0x80
254 #define ECB2_IEP	0x20
255 #define ECB2_PFMFI	0x08
256 #define ECB2_ESCA	0x04
257 	__u8    ecb2;                   /* 0x0062 */
258 #define ECB3_DEA 0x08
259 #define ECB3_AES 0x04
260 #define ECB3_RI  0x01
261 	__u8    ecb3;			/* 0x0063 */
262 	__u32	scaol;			/* 0x0064 */
263 	__u8	sdf;			/* 0x0068 */
264 	__u8    epdx;			/* 0x0069 */
265 	__u8	cpnc;			/* 0x006a */
266 	__u8	reserved6b;		/* 0x006b */
267 	__u32	todpr;			/* 0x006c */
268 #define GISA_FORMAT1 0x00000001
269 	__u32	gd;			/* 0x0070 */
270 	__u8	reserved74[12];		/* 0x0074 */
271 	__u64	mso;			/* 0x0080 */
272 	__u64	msl;			/* 0x0088 */
273 	psw_t	gpsw;			/* 0x0090 */
274 	__u64	gg14;			/* 0x00a0 */
275 	__u64	gg15;			/* 0x00a8 */
276 	__u8	reservedb0[8];		/* 0x00b0 */
277 #define HPID_KVM	0x4
278 #define HPID_VSIE	0x5
279 	__u8	hpid;			/* 0x00b8 */
280 	__u8	reservedb9[7];		/* 0x00b9 */
281 	union {
282 		struct {
283 			__u32	eiparams;	/* 0x00c0 */
284 			__u16	extcpuaddr;	/* 0x00c4 */
285 			__u16	eic;		/* 0x00c6 */
286 		};
287 		__u64	mcic;			/* 0x00c0 */
288 	} __packed;
289 	__u32	reservedc8;		/* 0x00c8 */
290 	union {
291 		struct {
292 			__u16	pgmilc;		/* 0x00cc */
293 			__u16	iprcc;		/* 0x00ce */
294 		};
295 		__u32	edc;			/* 0x00cc */
296 	} __packed;
297 	union {
298 		struct {
299 			__u32	dxc;		/* 0x00d0 */
300 			__u16	mcn;		/* 0x00d4 */
301 			__u8	perc;		/* 0x00d6 */
302 			__u8	peratmid;	/* 0x00d7 */
303 		};
304 		__u64	faddr;			/* 0x00d0 */
305 	} __packed;
306 	__u64	peraddr;		/* 0x00d8 */
307 	__u8	eai;			/* 0x00e0 */
308 	__u8	peraid;			/* 0x00e1 */
309 	__u8	oai;			/* 0x00e2 */
310 	__u8	armid;			/* 0x00e3 */
311 	__u8	reservede4[4];		/* 0x00e4 */
312 	union {
313 		__u64	tecmc;		/* 0x00e8 */
314 		struct {
315 			__u16	subchannel_id;	/* 0x00e8 */
316 			__u16	subchannel_nr;	/* 0x00ea */
317 			__u32	io_int_parm;	/* 0x00ec */
318 			__u32	io_int_word;	/* 0x00f0 */
319 		};
320 	} __packed;
321 	__u8	reservedf4[8];		/* 0x00f4 */
322 #define CRYCB_FORMAT_MASK 0x00000003
323 #define CRYCB_FORMAT0 0x00000000
324 #define CRYCB_FORMAT1 0x00000001
325 #define CRYCB_FORMAT2 0x00000003
326 	__u32	crycbd;			/* 0x00fc */
327 	__u64	gcr[16];		/* 0x0100 */
328 	union {
329 		__u64	gbea;		/* 0x0180 */
330 		__u64	sidad;
331 	};
332 	__u8    reserved188[8];		/* 0x0188 */
333 	__u64   sdnxo;			/* 0x0190 */
334 	__u8    reserved198[8];		/* 0x0198 */
335 	__u32	fac;			/* 0x01a0 */
336 	__u8	reserved1a4[20];	/* 0x01a4 */
337 	__u64	cbrlo;			/* 0x01b8 */
338 	__u8	reserved1c0[8];		/* 0x01c0 */
339 #define ECD_HOSTREGMGMT	0x20000000
340 #define ECD_MEF		0x08000000
341 #define ECD_ETOKENF	0x02000000
342 #define ECD_ECC		0x00200000
343 	__u32	ecd;			/* 0x01c8 */
344 	__u8	reserved1cc[18];	/* 0x01cc */
345 	__u64	pp;			/* 0x01de */
346 	__u8	reserved1e6[2];		/* 0x01e6 */
347 	__u64	itdba;			/* 0x01e8 */
348 	__u64   riccbd;			/* 0x01f0 */
349 	__u64	gvrd;			/* 0x01f8 */
350 } __packed __aligned(512);
351 
352 struct kvm_s390_itdb {
353 	__u8	data[256];
354 };
355 
356 struct sie_page {
357 	struct kvm_s390_sie_block sie_block;
358 	struct mcck_volatile_info mcck_info;	/* 0x0200 */
359 	__u8 reserved218[360];		/* 0x0218 */
360 	__u64 pv_grregs[16];		/* 0x0380 */
361 	__u8 reserved400[512];		/* 0x0400 */
362 	struct kvm_s390_itdb itdb;	/* 0x0600 */
363 	__u8 reserved700[2304];		/* 0x0700 */
364 };
365 
366 struct kvm_vcpu_stat {
367 	struct kvm_vcpu_stat_generic generic;
368 	u64 exit_userspace;
369 	u64 exit_null;
370 	u64 exit_external_request;
371 	u64 exit_io_request;
372 	u64 exit_external_interrupt;
373 	u64 exit_stop_request;
374 	u64 exit_validity;
375 	u64 exit_instruction;
376 	u64 exit_pei;
377 	u64 halt_no_poll_steal;
378 	u64 instruction_lctl;
379 	u64 instruction_lctlg;
380 	u64 instruction_stctl;
381 	u64 instruction_stctg;
382 	u64 exit_program_interruption;
383 	u64 exit_instr_and_program;
384 	u64 exit_operation_exception;
385 	u64 deliver_ckc;
386 	u64 deliver_cputm;
387 	u64 deliver_external_call;
388 	u64 deliver_emergency_signal;
389 	u64 deliver_service_signal;
390 	u64 deliver_virtio;
391 	u64 deliver_stop_signal;
392 	u64 deliver_prefix_signal;
393 	u64 deliver_restart_signal;
394 	u64 deliver_program;
395 	u64 deliver_io;
396 	u64 deliver_machine_check;
397 	u64 exit_wait_state;
398 	u64 inject_ckc;
399 	u64 inject_cputm;
400 	u64 inject_external_call;
401 	u64 inject_emergency_signal;
402 	u64 inject_mchk;
403 	u64 inject_pfault_init;
404 	u64 inject_program;
405 	u64 inject_restart;
406 	u64 inject_set_prefix;
407 	u64 inject_stop_signal;
408 	u64 instruction_epsw;
409 	u64 instruction_gs;
410 	u64 instruction_io_other;
411 	u64 instruction_lpsw;
412 	u64 instruction_lpswe;
413 	u64 instruction_pfmf;
414 	u64 instruction_ptff;
415 	u64 instruction_sck;
416 	u64 instruction_sckpf;
417 	u64 instruction_stidp;
418 	u64 instruction_spx;
419 	u64 instruction_stpx;
420 	u64 instruction_stap;
421 	u64 instruction_iske;
422 	u64 instruction_ri;
423 	u64 instruction_rrbe;
424 	u64 instruction_sske;
425 	u64 instruction_ipte_interlock;
426 	u64 instruction_stsi;
427 	u64 instruction_stfl;
428 	u64 instruction_tb;
429 	u64 instruction_tpi;
430 	u64 instruction_tprot;
431 	u64 instruction_tsch;
432 	u64 instruction_sie;
433 	u64 instruction_essa;
434 	u64 instruction_sthyi;
435 	u64 instruction_sigp_sense;
436 	u64 instruction_sigp_sense_running;
437 	u64 instruction_sigp_external_call;
438 	u64 instruction_sigp_emergency;
439 	u64 instruction_sigp_cond_emergency;
440 	u64 instruction_sigp_start;
441 	u64 instruction_sigp_stop;
442 	u64 instruction_sigp_stop_store_status;
443 	u64 instruction_sigp_store_status;
444 	u64 instruction_sigp_store_adtl_status;
445 	u64 instruction_sigp_arch;
446 	u64 instruction_sigp_prefix;
447 	u64 instruction_sigp_restart;
448 	u64 instruction_sigp_init_cpu_reset;
449 	u64 instruction_sigp_cpu_reset;
450 	u64 instruction_sigp_unknown;
451 	u64 instruction_diagnose_10;
452 	u64 instruction_diagnose_44;
453 	u64 instruction_diagnose_9c;
454 	u64 diag_9c_ignored;
455 	u64 diag_9c_forward;
456 	u64 instruction_diagnose_258;
457 	u64 instruction_diagnose_308;
458 	u64 instruction_diagnose_500;
459 	u64 instruction_diagnose_other;
460 	u64 pfault_sync;
461 };
462 
463 #define PGM_OPERATION			0x01
464 #define PGM_PRIVILEGED_OP		0x02
465 #define PGM_EXECUTE			0x03
466 #define PGM_PROTECTION			0x04
467 #define PGM_ADDRESSING			0x05
468 #define PGM_SPECIFICATION		0x06
469 #define PGM_DATA			0x07
470 #define PGM_FIXED_POINT_OVERFLOW	0x08
471 #define PGM_FIXED_POINT_DIVIDE		0x09
472 #define PGM_DECIMAL_OVERFLOW		0x0a
473 #define PGM_DECIMAL_DIVIDE		0x0b
474 #define PGM_HFP_EXPONENT_OVERFLOW	0x0c
475 #define PGM_HFP_EXPONENT_UNDERFLOW	0x0d
476 #define PGM_HFP_SIGNIFICANCE		0x0e
477 #define PGM_HFP_DIVIDE			0x0f
478 #define PGM_SEGMENT_TRANSLATION		0x10
479 #define PGM_PAGE_TRANSLATION		0x11
480 #define PGM_TRANSLATION_SPEC		0x12
481 #define PGM_SPECIAL_OPERATION		0x13
482 #define PGM_OPERAND			0x15
483 #define PGM_TRACE_TABEL			0x16
484 #define PGM_VECTOR_PROCESSING		0x1b
485 #define PGM_SPACE_SWITCH		0x1c
486 #define PGM_HFP_SQUARE_ROOT		0x1d
487 #define PGM_PC_TRANSLATION_SPEC		0x1f
488 #define PGM_AFX_TRANSLATION		0x20
489 #define PGM_ASX_TRANSLATION		0x21
490 #define PGM_LX_TRANSLATION		0x22
491 #define PGM_EX_TRANSLATION		0x23
492 #define PGM_PRIMARY_AUTHORITY		0x24
493 #define PGM_SECONDARY_AUTHORITY		0x25
494 #define PGM_LFX_TRANSLATION		0x26
495 #define PGM_LSX_TRANSLATION		0x27
496 #define PGM_ALET_SPECIFICATION		0x28
497 #define PGM_ALEN_TRANSLATION		0x29
498 #define PGM_ALE_SEQUENCE		0x2a
499 #define PGM_ASTE_VALIDITY		0x2b
500 #define PGM_ASTE_SEQUENCE		0x2c
501 #define PGM_EXTENDED_AUTHORITY		0x2d
502 #define PGM_LSTE_SEQUENCE		0x2e
503 #define PGM_ASTE_INSTANCE		0x2f
504 #define PGM_STACK_FULL			0x30
505 #define PGM_STACK_EMPTY			0x31
506 #define PGM_STACK_SPECIFICATION		0x32
507 #define PGM_STACK_TYPE			0x33
508 #define PGM_STACK_OPERATION		0x34
509 #define PGM_ASCE_TYPE			0x38
510 #define PGM_REGION_FIRST_TRANS		0x39
511 #define PGM_REGION_SECOND_TRANS		0x3a
512 #define PGM_REGION_THIRD_TRANS		0x3b
513 #define PGM_MONITOR			0x40
514 #define PGM_PER				0x80
515 #define PGM_CRYPTO_OPERATION		0x119
516 
517 /* irq types in ascend order of priorities */
518 enum irq_types {
519 	IRQ_PEND_SET_PREFIX = 0,
520 	IRQ_PEND_RESTART,
521 	IRQ_PEND_SIGP_STOP,
522 	IRQ_PEND_IO_ISC_7,
523 	IRQ_PEND_IO_ISC_6,
524 	IRQ_PEND_IO_ISC_5,
525 	IRQ_PEND_IO_ISC_4,
526 	IRQ_PEND_IO_ISC_3,
527 	IRQ_PEND_IO_ISC_2,
528 	IRQ_PEND_IO_ISC_1,
529 	IRQ_PEND_IO_ISC_0,
530 	IRQ_PEND_VIRTIO,
531 	IRQ_PEND_PFAULT_DONE,
532 	IRQ_PEND_PFAULT_INIT,
533 	IRQ_PEND_EXT_HOST,
534 	IRQ_PEND_EXT_SERVICE,
535 	IRQ_PEND_EXT_SERVICE_EV,
536 	IRQ_PEND_EXT_TIMING,
537 	IRQ_PEND_EXT_CPU_TIMER,
538 	IRQ_PEND_EXT_CLOCK_COMP,
539 	IRQ_PEND_EXT_EXTERNAL,
540 	IRQ_PEND_EXT_EMERGENCY,
541 	IRQ_PEND_EXT_MALFUNC,
542 	IRQ_PEND_EXT_IRQ_KEY,
543 	IRQ_PEND_MCHK_REP,
544 	IRQ_PEND_PROG,
545 	IRQ_PEND_SVC,
546 	IRQ_PEND_MCHK_EX,
547 	IRQ_PEND_COUNT
548 };
549 
550 /* We have 2M for virtio device descriptor pages. Smallest amount of
551  * memory per page is 24 bytes (1 queue), so (2048*1024) / 24 = 87381
552  */
553 #define KVM_S390_MAX_VIRTIO_IRQS 87381
554 
555 /*
556  * Repressible (non-floating) machine check interrupts
557  * subclass bits in MCIC
558  */
559 #define MCHK_EXTD_BIT 58
560 #define MCHK_DEGR_BIT 56
561 #define MCHK_WARN_BIT 55
562 #define MCHK_REP_MASK ((1UL << MCHK_DEGR_BIT) | \
563 		       (1UL << MCHK_EXTD_BIT) | \
564 		       (1UL << MCHK_WARN_BIT))
565 
566 /* Exigent machine check interrupts subclass bits in MCIC */
567 #define MCHK_SD_BIT 63
568 #define MCHK_PD_BIT 62
569 #define MCHK_EX_MASK ((1UL << MCHK_SD_BIT) | (1UL << MCHK_PD_BIT))
570 
571 #define IRQ_PEND_EXT_MASK ((1UL << IRQ_PEND_EXT_IRQ_KEY)    | \
572 			   (1UL << IRQ_PEND_EXT_CLOCK_COMP) | \
573 			   (1UL << IRQ_PEND_EXT_CPU_TIMER)  | \
574 			   (1UL << IRQ_PEND_EXT_MALFUNC)    | \
575 			   (1UL << IRQ_PEND_EXT_EMERGENCY)  | \
576 			   (1UL << IRQ_PEND_EXT_EXTERNAL)   | \
577 			   (1UL << IRQ_PEND_EXT_TIMING)     | \
578 			   (1UL << IRQ_PEND_EXT_HOST)       | \
579 			   (1UL << IRQ_PEND_EXT_SERVICE)    | \
580 			   (1UL << IRQ_PEND_EXT_SERVICE_EV) | \
581 			   (1UL << IRQ_PEND_VIRTIO)         | \
582 			   (1UL << IRQ_PEND_PFAULT_INIT)    | \
583 			   (1UL << IRQ_PEND_PFAULT_DONE))
584 
585 #define IRQ_PEND_IO_MASK ((1UL << IRQ_PEND_IO_ISC_0) | \
586 			  (1UL << IRQ_PEND_IO_ISC_1) | \
587 			  (1UL << IRQ_PEND_IO_ISC_2) | \
588 			  (1UL << IRQ_PEND_IO_ISC_3) | \
589 			  (1UL << IRQ_PEND_IO_ISC_4) | \
590 			  (1UL << IRQ_PEND_IO_ISC_5) | \
591 			  (1UL << IRQ_PEND_IO_ISC_6) | \
592 			  (1UL << IRQ_PEND_IO_ISC_7))
593 
594 #define IRQ_PEND_MCHK_MASK ((1UL << IRQ_PEND_MCHK_REP) | \
595 			    (1UL << IRQ_PEND_MCHK_EX))
596 
597 #define IRQ_PEND_EXT_II_MASK ((1UL << IRQ_PEND_EXT_CPU_TIMER)  | \
598 			      (1UL << IRQ_PEND_EXT_CLOCK_COMP) | \
599 			      (1UL << IRQ_PEND_EXT_EMERGENCY)  | \
600 			      (1UL << IRQ_PEND_EXT_EXTERNAL)   | \
601 			      (1UL << IRQ_PEND_EXT_SERVICE)    | \
602 			      (1UL << IRQ_PEND_EXT_SERVICE_EV))
603 
604 struct kvm_s390_interrupt_info {
605 	struct list_head list;
606 	u64	type;
607 	union {
608 		struct kvm_s390_io_info io;
609 		struct kvm_s390_ext_info ext;
610 		struct kvm_s390_pgm_info pgm;
611 		struct kvm_s390_emerg_info emerg;
612 		struct kvm_s390_extcall_info extcall;
613 		struct kvm_s390_prefix_info prefix;
614 		struct kvm_s390_stop_info stop;
615 		struct kvm_s390_mchk_info mchk;
616 	};
617 };
618 
619 struct kvm_s390_irq_payload {
620 	struct kvm_s390_io_info io;
621 	struct kvm_s390_ext_info ext;
622 	struct kvm_s390_pgm_info pgm;
623 	struct kvm_s390_emerg_info emerg;
624 	struct kvm_s390_extcall_info extcall;
625 	struct kvm_s390_prefix_info prefix;
626 	struct kvm_s390_stop_info stop;
627 	struct kvm_s390_mchk_info mchk;
628 };
629 
630 struct kvm_s390_local_interrupt {
631 	spinlock_t lock;
632 	DECLARE_BITMAP(sigp_emerg_pending, KVM_MAX_VCPUS);
633 	struct kvm_s390_irq_payload irq;
634 	unsigned long pending_irqs;
635 };
636 
637 #define FIRQ_LIST_IO_ISC_0 0
638 #define FIRQ_LIST_IO_ISC_1 1
639 #define FIRQ_LIST_IO_ISC_2 2
640 #define FIRQ_LIST_IO_ISC_3 3
641 #define FIRQ_LIST_IO_ISC_4 4
642 #define FIRQ_LIST_IO_ISC_5 5
643 #define FIRQ_LIST_IO_ISC_6 6
644 #define FIRQ_LIST_IO_ISC_7 7
645 #define FIRQ_LIST_PFAULT   8
646 #define FIRQ_LIST_VIRTIO   9
647 #define FIRQ_LIST_COUNT   10
648 #define FIRQ_CNTR_IO       0
649 #define FIRQ_CNTR_SERVICE  1
650 #define FIRQ_CNTR_VIRTIO   2
651 #define FIRQ_CNTR_PFAULT   3
652 #define FIRQ_MAX_COUNT     4
653 
654 /* mask the AIS mode for a given ISC */
655 #define AIS_MODE_MASK(isc) (0x80 >> isc)
656 
657 #define KVM_S390_AIS_MODE_ALL    0
658 #define KVM_S390_AIS_MODE_SINGLE 1
659 
660 struct kvm_s390_float_interrupt {
661 	unsigned long pending_irqs;
662 	unsigned long masked_irqs;
663 	spinlock_t lock;
664 	struct list_head lists[FIRQ_LIST_COUNT];
665 	int counters[FIRQ_MAX_COUNT];
666 	struct kvm_s390_mchk_info mchk;
667 	struct kvm_s390_ext_info srv_signal;
668 	int next_rr_cpu;
669 	struct mutex ais_lock;
670 	u8 simm;
671 	u8 nimm;
672 };
673 
674 struct kvm_hw_wp_info_arch {
675 	unsigned long addr;
676 	unsigned long phys_addr;
677 	int len;
678 	char *old_data;
679 };
680 
681 struct kvm_hw_bp_info_arch {
682 	unsigned long addr;
683 	int len;
684 };
685 
686 /*
687  * Only the upper 16 bits of kvm_guest_debug->control are arch specific.
688  * Further KVM_GUESTDBG flags which an be used from userspace can be found in
689  * arch/s390/include/uapi/asm/kvm.h
690  */
691 #define KVM_GUESTDBG_EXIT_PENDING 0x10000000
692 
693 #define guestdbg_enabled(vcpu) \
694 		(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)
695 #define guestdbg_sstep_enabled(vcpu) \
696 		(vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
697 #define guestdbg_hw_bp_enabled(vcpu) \
698 		(vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
699 #define guestdbg_exit_pending(vcpu) (guestdbg_enabled(vcpu) && \
700 		(vcpu->guest_debug & KVM_GUESTDBG_EXIT_PENDING))
701 
702 #define KVM_GUESTDBG_VALID_MASK \
703 		(KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_SINGLESTEP |\
704 		KVM_GUESTDBG_USE_HW_BP | KVM_GUESTDBG_EXIT_PENDING)
705 
706 struct kvm_guestdbg_info_arch {
707 	unsigned long cr0;
708 	unsigned long cr9;
709 	unsigned long cr10;
710 	unsigned long cr11;
711 	struct kvm_hw_bp_info_arch *hw_bp_info;
712 	struct kvm_hw_wp_info_arch *hw_wp_info;
713 	int nr_hw_bp;
714 	int nr_hw_wp;
715 	unsigned long last_bp;
716 };
717 
718 struct kvm_s390_pv_vcpu {
719 	u64 handle;
720 	unsigned long stor_base;
721 };
722 
723 struct kvm_vcpu_arch {
724 	struct kvm_s390_sie_block *sie_block;
725 	/* if vsie is active, currently executed shadow sie control block */
726 	struct kvm_s390_sie_block *vsie_block;
727 	unsigned int      host_acrs[NUM_ACRS];
728 	struct gs_cb      *host_gscb;
729 	struct fpu	  host_fpregs;
730 	struct kvm_s390_local_interrupt local_int;
731 	struct hrtimer    ckc_timer;
732 	struct kvm_s390_pgm_info pgm;
733 	struct gmap *gmap;
734 	/* backup location for the currently enabled gmap when scheduled out */
735 	struct gmap *enabled_gmap;
736 	struct kvm_guestdbg_info_arch guestdbg;
737 	unsigned long pfault_token;
738 	unsigned long pfault_select;
739 	unsigned long pfault_compare;
740 	bool cputm_enabled;
741 	/*
742 	 * The seqcount protects updates to cputm_start and sie_block.cputm,
743 	 * this way we can have non-blocking reads with consistent values.
744 	 * Only the owning VCPU thread (vcpu->cpu) is allowed to change these
745 	 * values and to start/stop/enable/disable cpu timer accounting.
746 	 */
747 	seqcount_t cputm_seqcount;
748 	__u64 cputm_start;
749 	bool gs_enabled;
750 	bool skey_enabled;
751 	struct kvm_s390_pv_vcpu pv;
752 	union diag318_info diag318_info;
753 };
754 
755 struct kvm_vm_stat {
756 	struct kvm_vm_stat_generic generic;
757 	u64 inject_io;
758 	u64 inject_float_mchk;
759 	u64 inject_pfault_done;
760 	u64 inject_service_signal;
761 	u64 inject_virtio;
762 };
763 
764 struct kvm_arch_memory_slot {
765 };
766 
767 struct s390_map_info {
768 	struct list_head list;
769 	__u64 guest_addr;
770 	__u64 addr;
771 	struct page *page;
772 };
773 
774 struct s390_io_adapter {
775 	unsigned int id;
776 	int isc;
777 	bool maskable;
778 	bool masked;
779 	bool swap;
780 	bool suppressible;
781 };
782 
783 #define MAX_S390_IO_ADAPTERS ((MAX_ISC + 1) * 8)
784 #define MAX_S390_ADAPTER_MAPS 256
785 
786 /* maximum size of facilities and facility mask is 2k bytes */
787 #define S390_ARCH_FAC_LIST_SIZE_BYTE (1<<11)
788 #define S390_ARCH_FAC_LIST_SIZE_U64 \
789 	(S390_ARCH_FAC_LIST_SIZE_BYTE / sizeof(u64))
790 #define S390_ARCH_FAC_MASK_SIZE_BYTE S390_ARCH_FAC_LIST_SIZE_BYTE
791 #define S390_ARCH_FAC_MASK_SIZE_U64 \
792 	(S390_ARCH_FAC_MASK_SIZE_BYTE / sizeof(u64))
793 
794 struct kvm_s390_cpu_model {
795 	/* facility mask supported by kvm & hosting machine */
796 	__u64 fac_mask[S390_ARCH_FAC_LIST_SIZE_U64];
797 	struct kvm_s390_vm_cpu_subfunc subfuncs;
798 	/* facility list requested by guest (in dma page) */
799 	__u64 *fac_list;
800 	u64 cpuid;
801 	unsigned short ibc;
802 };
803 
804 typedef int (*crypto_hook)(struct kvm_vcpu *vcpu);
805 
806 struct kvm_s390_crypto {
807 	struct kvm_s390_crypto_cb *crycb;
808 	struct rw_semaphore pqap_hook_rwsem;
809 	crypto_hook *pqap_hook;
810 	__u32 crycbd;
811 	__u8 aes_kw;
812 	__u8 dea_kw;
813 	__u8 apie;
814 };
815 
816 #define APCB0_MASK_SIZE 1
817 struct kvm_s390_apcb0 {
818 	__u64 apm[APCB0_MASK_SIZE];		/* 0x0000 */
819 	__u64 aqm[APCB0_MASK_SIZE];		/* 0x0008 */
820 	__u64 adm[APCB0_MASK_SIZE];		/* 0x0010 */
821 	__u64 reserved18;			/* 0x0018 */
822 };
823 
824 #define APCB1_MASK_SIZE 4
825 struct kvm_s390_apcb1 {
826 	__u64 apm[APCB1_MASK_SIZE];		/* 0x0000 */
827 	__u64 aqm[APCB1_MASK_SIZE];		/* 0x0020 */
828 	__u64 adm[APCB1_MASK_SIZE];		/* 0x0040 */
829 	__u64 reserved60[4];			/* 0x0060 */
830 };
831 
832 struct kvm_s390_crypto_cb {
833 	struct kvm_s390_apcb0 apcb0;		/* 0x0000 */
834 	__u8   reserved20[0x0048 - 0x0020];	/* 0x0020 */
835 	__u8   dea_wrapping_key_mask[24];	/* 0x0048 */
836 	__u8   aes_wrapping_key_mask[32];	/* 0x0060 */
837 	struct kvm_s390_apcb1 apcb1;		/* 0x0080 */
838 };
839 
840 struct kvm_s390_gisa {
841 	union {
842 		struct { /* common to all formats */
843 			u32 next_alert;
844 			u8  ipm;
845 			u8  reserved01[2];
846 			u8  iam;
847 		};
848 		struct { /* format 0 */
849 			u32 next_alert;
850 			u8  ipm;
851 			u8  reserved01;
852 			u8  : 6;
853 			u8  g : 1;
854 			u8  c : 1;
855 			u8  iam;
856 			u8  reserved02[4];
857 			u32 airq_count;
858 		} g0;
859 		struct { /* format 1 */
860 			u32 next_alert;
861 			u8  ipm;
862 			u8  simm;
863 			u8  nimm;
864 			u8  iam;
865 			u8  aism[8];
866 			u8  : 6;
867 			u8  g : 1;
868 			u8  c : 1;
869 			u8  reserved03[11];
870 			u32 airq_count;
871 		} g1;
872 		struct {
873 			u64 word[4];
874 		} u64;
875 	};
876 };
877 
878 struct kvm_s390_gib {
879 	u32 alert_list_origin;
880 	u32 reserved01;
881 	u8:5;
882 	u8  nisc:3;
883 	u8  reserved03[3];
884 	u32 reserved04[5];
885 };
886 
887 /*
888  * sie_page2 has to be allocated as DMA because fac_list, crycb and
889  * gisa need 31bit addresses in the sie control block.
890  */
891 struct sie_page2 {
892 	__u64 fac_list[S390_ARCH_FAC_LIST_SIZE_U64];	/* 0x0000 */
893 	struct kvm_s390_crypto_cb crycb;		/* 0x0800 */
894 	struct kvm_s390_gisa gisa;			/* 0x0900 */
895 	struct kvm *kvm;				/* 0x0920 */
896 	u8 reserved928[0x1000 - 0x928];			/* 0x0928 */
897 };
898 
899 struct kvm_s390_vsie {
900 	struct mutex mutex;
901 	struct radix_tree_root addr_to_page;
902 	int page_count;
903 	int next;
904 	struct page *pages[KVM_MAX_VCPUS];
905 };
906 
907 struct kvm_s390_gisa_iam {
908 	u8 mask;
909 	spinlock_t ref_lock;
910 	u32 ref_count[MAX_ISC + 1];
911 };
912 
913 struct kvm_s390_gisa_interrupt {
914 	struct kvm_s390_gisa *origin;
915 	struct kvm_s390_gisa_iam alert;
916 	struct hrtimer timer;
917 	u64 expires;
918 	DECLARE_BITMAP(kicked_mask, KVM_MAX_VCPUS);
919 };
920 
921 struct kvm_s390_pv {
922 	u64 handle;
923 	u64 guest_len;
924 	unsigned long stor_base;
925 	void *stor_var;
926 };
927 
928 struct kvm_arch{
929 	void *sca;
930 	int use_esca;
931 	rwlock_t sca_lock;
932 	debug_info_t *dbf;
933 	struct kvm_s390_float_interrupt float_int;
934 	struct kvm_device *flic;
935 	struct gmap *gmap;
936 	unsigned long mem_limit;
937 	int css_support;
938 	int use_irqchip;
939 	int use_cmma;
940 	int use_pfmfi;
941 	int use_skf;
942 	int user_cpu_state_ctrl;
943 	int user_sigp;
944 	int user_stsi;
945 	int user_instr0;
946 	struct s390_io_adapter *adapters[MAX_S390_IO_ADAPTERS];
947 	wait_queue_head_t ipte_wq;
948 	int ipte_lock_count;
949 	struct mutex ipte_mutex;
950 	spinlock_t start_stop_lock;
951 	struct sie_page2 *sie_page2;
952 	struct kvm_s390_cpu_model model;
953 	struct kvm_s390_crypto crypto;
954 	struct kvm_s390_vsie vsie;
955 	u8 epdx;
956 	u64 epoch;
957 	int migration_mode;
958 	atomic64_t cmma_dirty_pages;
959 	/* subset of available cpu features enabled by user space */
960 	DECLARE_BITMAP(cpu_feat, KVM_S390_VM_CPU_FEAT_NR_BITS);
961 	/* indexed by vcpu_idx */
962 	DECLARE_BITMAP(idle_mask, KVM_MAX_VCPUS);
963 	struct kvm_s390_gisa_interrupt gisa_int;
964 	struct kvm_s390_pv pv;
965 };
966 
967 #define KVM_HVA_ERR_BAD		(-1UL)
968 #define KVM_HVA_ERR_RO_BAD	(-2UL)
969 
kvm_is_error_hva(unsigned long addr)970 static inline bool kvm_is_error_hva(unsigned long addr)
971 {
972 	return IS_ERR_VALUE(addr);
973 }
974 
975 #define ASYNC_PF_PER_VCPU	64
976 struct kvm_arch_async_pf {
977 	unsigned long pfault_token;
978 };
979 
980 bool kvm_arch_can_dequeue_async_page_present(struct kvm_vcpu *vcpu);
981 
982 void kvm_arch_async_page_ready(struct kvm_vcpu *vcpu,
983 			       struct kvm_async_pf *work);
984 
985 bool kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
986 				     struct kvm_async_pf *work);
987 
988 void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
989 				 struct kvm_async_pf *work);
990 
kvm_arch_async_page_present_queued(struct kvm_vcpu * vcpu)991 static inline void kvm_arch_async_page_present_queued(struct kvm_vcpu *vcpu) {}
992 
993 void kvm_arch_crypto_clear_masks(struct kvm *kvm);
994 void kvm_arch_crypto_set_masks(struct kvm *kvm, unsigned long *apm,
995 			       unsigned long *aqm, unsigned long *adm);
996 
997 extern int sie64a(struct kvm_s390_sie_block *, u64 *);
998 extern char sie_exit;
999 
1000 extern int kvm_s390_gisc_register(struct kvm *kvm, u32 gisc);
1001 extern int kvm_s390_gisc_unregister(struct kvm *kvm, u32 gisc);
1002 
kvm_arch_hardware_disable(void)1003 static inline void kvm_arch_hardware_disable(void) {}
kvm_arch_sync_events(struct kvm * kvm)1004 static inline void kvm_arch_sync_events(struct kvm *kvm) {}
kvm_arch_sched_in(struct kvm_vcpu * vcpu,int cpu)1005 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
kvm_arch_free_memslot(struct kvm * kvm,struct kvm_memory_slot * slot)1006 static inline void kvm_arch_free_memslot(struct kvm *kvm,
1007 					 struct kvm_memory_slot *slot) {}
kvm_arch_memslots_updated(struct kvm * kvm,u64 gen)1008 static inline void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen) {}
kvm_arch_flush_shadow_all(struct kvm * kvm)1009 static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {}
kvm_arch_flush_shadow_memslot(struct kvm * kvm,struct kvm_memory_slot * slot)1010 static inline void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
1011 		struct kvm_memory_slot *slot) {}
kvm_arch_vcpu_blocking(struct kvm_vcpu * vcpu)1012 static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {}
kvm_arch_vcpu_unblocking(struct kvm_vcpu * vcpu)1013 static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {}
1014 
1015 #endif
1016