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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Ultravisor Interfaces
4 *
5 * Copyright IBM Corp. 2019, 2022
6 *
7 * Author(s):
8 * Vasily Gorbik <gor@linux.ibm.com>
9 * Janosch Frank <frankja@linux.ibm.com>
10 */
11#ifndef _ASM_S390_UV_H
12#define _ASM_S390_UV_H
13
14#include <linux/types.h>
15#include <linux/errno.h>
16#include <linux/bug.h>
17#include <linux/sched.h>
18#include <asm/page.h>
19#include <asm/gmap.h>
20
21#define UVC_CC_OK 0
22#define UVC_CC_ERROR 1
23#define UVC_CC_BUSY 2
24#define UVC_CC_PARTIAL 3
25
26#define UVC_RC_EXECUTED 0x0001
27#define UVC_RC_INV_CMD 0x0002
28#define UVC_RC_INV_STATE 0x0003
29#define UVC_RC_INV_LEN 0x0005
30#define UVC_RC_NO_RESUME 0x0007
31#define UVC_RC_NEED_DESTROY 0x8000
32
33#define UVC_CMD_QUI 0x0001
34#define UVC_CMD_INIT_UV 0x000f
35#define UVC_CMD_CREATE_SEC_CONF 0x0100
36#define UVC_CMD_DESTROY_SEC_CONF 0x0101
37#define UVC_CMD_DESTROY_SEC_CONF_FAST 0x0102
38#define UVC_CMD_CREATE_SEC_CPU 0x0120
39#define UVC_CMD_DESTROY_SEC_CPU 0x0121
40#define UVC_CMD_CONV_TO_SEC_STOR 0x0200
41#define UVC_CMD_CONV_FROM_SEC_STOR 0x0201
42#define UVC_CMD_DESTR_SEC_STOR 0x0202
43#define UVC_CMD_SET_SEC_CONF_PARAMS 0x0300
44#define UVC_CMD_UNPACK_IMG 0x0301
45#define UVC_CMD_VERIFY_IMG 0x0302
46#define UVC_CMD_CPU_RESET 0x0310
47#define UVC_CMD_CPU_RESET_INITIAL 0x0311
48#define UVC_CMD_PREPARE_RESET 0x0320
49#define UVC_CMD_CPU_RESET_CLEAR 0x0321
50#define UVC_CMD_CPU_SET_STATE 0x0330
51#define UVC_CMD_SET_UNSHARE_ALL 0x0340
52#define UVC_CMD_PIN_PAGE_SHARED 0x0341
53#define UVC_CMD_UNPIN_PAGE_SHARED 0x0342
54#define UVC_CMD_DUMP_INIT 0x0400
55#define UVC_CMD_DUMP_CONF_STOR_STATE 0x0401
56#define UVC_CMD_DUMP_CPU 0x0402
57#define UVC_CMD_DUMP_COMPLETE 0x0403
58#define UVC_CMD_SET_SHARED_ACCESS 0x1000
59#define UVC_CMD_REMOVE_SHARED_ACCESS 0x1001
60#define UVC_CMD_RETR_ATTEST 0x1020
61
62/* Bits in installed uv calls */
63enum uv_cmds_inst {
64 BIT_UVC_CMD_QUI = 0,
65 BIT_UVC_CMD_INIT_UV = 1,
66 BIT_UVC_CMD_CREATE_SEC_CONF = 2,
67 BIT_UVC_CMD_DESTROY_SEC_CONF = 3,
68 BIT_UVC_CMD_CREATE_SEC_CPU = 4,
69 BIT_UVC_CMD_DESTROY_SEC_CPU = 5,
70 BIT_UVC_CMD_CONV_TO_SEC_STOR = 6,
71 BIT_UVC_CMD_CONV_FROM_SEC_STOR = 7,
72 BIT_UVC_CMD_SET_SHARED_ACCESS = 8,
73 BIT_UVC_CMD_REMOVE_SHARED_ACCESS = 9,
74 BIT_UVC_CMD_SET_SEC_PARMS = 11,
75 BIT_UVC_CMD_UNPACK_IMG = 13,
76 BIT_UVC_CMD_VERIFY_IMG = 14,
77 BIT_UVC_CMD_CPU_RESET = 15,
78 BIT_UVC_CMD_CPU_RESET_INITIAL = 16,
79 BIT_UVC_CMD_CPU_SET_STATE = 17,
80 BIT_UVC_CMD_PREPARE_RESET = 18,
81 BIT_UVC_CMD_CPU_PERFORM_CLEAR_RESET = 19,
82 BIT_UVC_CMD_UNSHARE_ALL = 20,
83 BIT_UVC_CMD_PIN_PAGE_SHARED = 21,
84 BIT_UVC_CMD_UNPIN_PAGE_SHARED = 22,
85 BIT_UVC_CMD_DESTROY_SEC_CONF_FAST = 23,
86 BIT_UVC_CMD_DUMP_INIT = 24,
87 BIT_UVC_CMD_DUMP_CONFIG_STOR_STATE = 25,
88 BIT_UVC_CMD_DUMP_CPU = 26,
89 BIT_UVC_CMD_DUMP_COMPLETE = 27,
90 BIT_UVC_CMD_RETR_ATTEST = 28,
91};
92
93enum uv_feat_ind {
94 BIT_UV_FEAT_MISC = 0,
95 BIT_UV_FEAT_AIV = 1,
96};
97
98struct uv_cb_header {
99 u16 len;
100 u16 cmd; /* Command Code */
101 u16 rc; /* Response Code */
102 u16 rrc; /* Return Reason Code */
103} __packed __aligned(8);
104
105/* Query Ultravisor Information */
106struct uv_cb_qui {
107 struct uv_cb_header header; /* 0x0000 */
108 u64 reserved08; /* 0x0008 */
109 u64 inst_calls_list[4]; /* 0x0010 */
110 u64 reserved30[2]; /* 0x0030 */
111 u64 uv_base_stor_len; /* 0x0040 */
112 u64 reserved48; /* 0x0048 */
113 u64 conf_base_phys_stor_len; /* 0x0050 */
114 u64 conf_base_virt_stor_len; /* 0x0058 */
115 u64 conf_virt_var_stor_len; /* 0x0060 */
116 u64 cpu_stor_len; /* 0x0068 */
117 u32 reserved70[3]; /* 0x0070 */
118 u32 max_num_sec_conf; /* 0x007c */
119 u64 max_guest_stor_addr; /* 0x0080 */
120 u8 reserved88[158 - 136]; /* 0x0088 */
121 u16 max_guest_cpu_id; /* 0x009e */
122 u64 uv_feature_indications; /* 0x00a0 */
123 u64 reserveda8; /* 0x00a8 */
124 u64 supp_se_hdr_versions; /* 0x00b0 */
125 u64 supp_se_hdr_pcf; /* 0x00b8 */
126 u64 reservedc0; /* 0x00c0 */
127 u64 conf_dump_storage_state_len; /* 0x00c8 */
128 u64 conf_dump_finalize_len; /* 0x00d0 */
129 u64 reservedd8; /* 0x00d8 */
130 u64 supp_att_req_hdr_ver; /* 0x00e0 */
131 u64 supp_att_pflags; /* 0x00e8 */
132 u8 reservedf0[256 - 240]; /* 0x00f0 */
133} __packed __aligned(8);
134
135/* Initialize Ultravisor */
136struct uv_cb_init {
137 struct uv_cb_header header;
138 u64 reserved08[2];
139 u64 stor_origin;
140 u64 stor_len;
141 u64 reserved28[4];
142} __packed __aligned(8);
143
144/* Create Guest Configuration */
145struct uv_cb_cgc {
146 struct uv_cb_header header;
147 u64 reserved08[2];
148 u64 guest_handle;
149 u64 conf_base_stor_origin;
150 u64 conf_virt_stor_origin;
151 u64 reserved30;
152 u64 guest_stor_origin;
153 u64 guest_stor_len;
154 u64 guest_sca;
155 u64 guest_asce;
156 u64 reserved58[5];
157} __packed __aligned(8);
158
159/* Create Secure CPU */
160struct uv_cb_csc {
161 struct uv_cb_header header;
162 u64 reserved08[2];
163 u64 cpu_handle;
164 u64 guest_handle;
165 u64 stor_origin;
166 u8 reserved30[6];
167 u16 num;
168 u64 state_origin;
169 u64 reserved40[4];
170} __packed __aligned(8);
171
172/* Convert to Secure */
173struct uv_cb_cts {
174 struct uv_cb_header header;
175 u64 reserved08[2];
176 u64 guest_handle;
177 u64 gaddr;
178} __packed __aligned(8);
179
180/* Convert from Secure / Pin Page Shared */
181struct uv_cb_cfs {
182 struct uv_cb_header header;
183 u64 reserved08[2];
184 u64 paddr;
185} __packed __aligned(8);
186
187/* Set Secure Config Parameter */
188struct uv_cb_ssc {
189 struct uv_cb_header header;
190 u64 reserved08[2];
191 u64 guest_handle;
192 u64 sec_header_origin;
193 u32 sec_header_len;
194 u32 reserved2c;
195 u64 reserved30[4];
196} __packed __aligned(8);
197
198/* Unpack */
199struct uv_cb_unp {
200 struct uv_cb_header header;
201 u64 reserved08[2];
202 u64 guest_handle;
203 u64 gaddr;
204 u64 tweak[2];
205 u64 reserved38[3];
206} __packed __aligned(8);
207
208#define PV_CPU_STATE_OPR 1
209#define PV_CPU_STATE_STP 2
210#define PV_CPU_STATE_CHKSTP 3
211#define PV_CPU_STATE_OPR_LOAD 5
212
213struct uv_cb_cpu_set_state {
214 struct uv_cb_header header;
215 u64 reserved08[2];
216 u64 cpu_handle;
217 u8 reserved20[7];
218 u8 state;
219 u64 reserved28[5];
220};
221
222/*
223 * A common UV call struct for calls that take no payload
224 * Examples:
225 * Destroy cpu/config
226 * Verify
227 */
228struct uv_cb_nodata {
229 struct uv_cb_header header;
230 u64 reserved08[2];
231 u64 handle;
232 u64 reserved20[4];
233} __packed __aligned(8);
234
235/* Destroy Configuration Fast */
236struct uv_cb_destroy_fast {
237 struct uv_cb_header header;
238 u64 reserved08[2];
239 u64 handle;
240 u64 reserved20[5];
241} __packed __aligned(8);
242
243/* Set Shared Access */
244struct uv_cb_share {
245 struct uv_cb_header header;
246 u64 reserved08[3];
247 u64 paddr;
248 u64 reserved28;
249} __packed __aligned(8);
250
251/* Retrieve Attestation Measurement */
252struct uv_cb_attest {
253 struct uv_cb_header header; /* 0x0000 */
254 u64 reserved08[2]; /* 0x0008 */
255 u64 arcb_addr; /* 0x0018 */
256 u64 cont_token; /* 0x0020 */
257 u8 reserved28[6]; /* 0x0028 */
258 u16 user_data_len; /* 0x002e */
259 u8 user_data[256]; /* 0x0030 */
260 u32 reserved130[3]; /* 0x0130 */
261 u32 meas_len; /* 0x013c */
262 u64 meas_addr; /* 0x0140 */
263 u8 config_uid[16]; /* 0x0148 */
264 u32 reserved158; /* 0x0158 */
265 u32 add_data_len; /* 0x015c */
266 u64 add_data_addr; /* 0x0160 */
267 u64 reserved168[4]; /* 0x0168 */
268} __packed __aligned(8);
269
270struct uv_cb_dump_cpu {
271 struct uv_cb_header header;
272 u64 reserved08[2];
273 u64 cpu_handle;
274 u64 dump_area_origin;
275 u64 reserved28[5];
276} __packed __aligned(8);
277
278struct uv_cb_dump_stor_state {
279 struct uv_cb_header header;
280 u64 reserved08[2];
281 u64 config_handle;
282 u64 dump_area_origin;
283 u64 gaddr;
284 u64 reserved28[4];
285} __packed __aligned(8);
286
287struct uv_cb_dump_complete {
288 struct uv_cb_header header;
289 u64 reserved08[2];
290 u64 config_handle;
291 u64 dump_area_origin;
292 u64 reserved30[5];
293} __packed __aligned(8);
294
295static inline int __uv_call(unsigned long r1, unsigned long r2)
296{
297 int cc;
298
299 asm volatile(
300 " .insn rrf,0xB9A40000,%[r1],%[r2],0,0\n"
301 " ipm %[cc]\n"
302 " srl %[cc],28\n"
303 : [cc] "=d" (cc)
304 : [r1] "a" (r1), [r2] "a" (r2)
305 : "memory", "cc");
306 return cc;
307}
308
309static inline int uv_call(unsigned long r1, unsigned long r2)
310{
311 int cc;
312
313 do {
314 cc = __uv_call(r1, r2);
315 } while (cc > 1);
316 return cc;
317}
318
319/* Low level uv_call that avoids stalls for long running busy conditions */
320static inline int uv_call_sched(unsigned long r1, unsigned long r2)
321{
322 int cc;
323
324 do {
325 cc = __uv_call(r1, r2);
326 cond_resched();
327 } while (cc > 1);
328 return cc;
329}
330
331/*
332 * special variant of uv_call that only transports the cpu or guest
333 * handle and the command, like destroy or verify.
334 */
335static inline int uv_cmd_nodata(u64 handle, u16 cmd, u16 *rc, u16 *rrc)
336{
337 struct uv_cb_nodata uvcb = {
338 .header.cmd = cmd,
339 .header.len = sizeof(uvcb),
340 .handle = handle,
341 };
342 int cc;
343
344 WARN(!handle, "No handle provided to Ultravisor call cmd %x\n", cmd);
345 cc = uv_call_sched(0, (u64)&uvcb);
346 *rc = uvcb.header.rc;
347 *rrc = uvcb.header.rrc;
348 return cc ? -EINVAL : 0;
349}
350
351struct uv_info {
352 unsigned long inst_calls_list[4];
353 unsigned long uv_base_stor_len;
354 unsigned long guest_base_stor_len;
355 unsigned long guest_virt_base_stor_len;
356 unsigned long guest_virt_var_stor_len;
357 unsigned long guest_cpu_stor_len;
358 unsigned long max_sec_stor_addr;
359 unsigned int max_num_sec_conf;
360 unsigned short max_guest_cpu_id;
361 unsigned long uv_feature_indications;
362 unsigned long supp_se_hdr_ver;
363 unsigned long supp_se_hdr_pcf;
364 unsigned long conf_dump_storage_state_len;
365 unsigned long conf_dump_finalize_len;
366 unsigned long supp_att_req_hdr_ver;
367 unsigned long supp_att_pflags;
368};
369
370extern struct uv_info uv_info;
371
372#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
373extern int prot_virt_guest;
374
375static inline int is_prot_virt_guest(void)
376{
377 return prot_virt_guest;
378}
379
380static inline int share(unsigned long addr, u16 cmd)
381{
382 struct uv_cb_share uvcb = {
383 .header.cmd = cmd,
384 .header.len = sizeof(uvcb),
385 .paddr = addr
386 };
387
388 if (!is_prot_virt_guest())
389 return -EOPNOTSUPP;
390 /*
391 * Sharing is page wise, if we encounter addresses that are
392 * not page aligned, we assume something went wrong. If
393 * malloced structs are passed to this function, we could leak
394 * data to the hypervisor.
395 */
396 BUG_ON(addr & ~PAGE_MASK);
397
398 if (!uv_call(0, (u64)&uvcb))
399 return 0;
400 return -EINVAL;
401}
402
403/*
404 * Guest 2 request to the Ultravisor to make a page shared with the
405 * hypervisor for IO.
406 *
407 * @addr: Real or absolute address of the page to be shared
408 */
409static inline int uv_set_shared(unsigned long addr)
410{
411 return share(addr, UVC_CMD_SET_SHARED_ACCESS);
412}
413
414/*
415 * Guest 2 request to the Ultravisor to make a page unshared.
416 *
417 * @addr: Real or absolute address of the page to be unshared
418 */
419static inline int uv_remove_shared(unsigned long addr)
420{
421 return share(addr, UVC_CMD_REMOVE_SHARED_ACCESS);
422}
423
424#else
425#define is_prot_virt_guest() 0
426static inline int uv_set_shared(unsigned long addr) { return 0; }
427static inline int uv_remove_shared(unsigned long addr) { return 0; }
428#endif
429
430#if IS_ENABLED(CONFIG_KVM)
431extern int prot_virt_host;
432
433static inline int is_prot_virt_host(void)
434{
435 return prot_virt_host;
436}
437
438int gmap_make_secure(struct gmap *gmap, unsigned long gaddr, void *uvcb);
439int gmap_destroy_page(struct gmap *gmap, unsigned long gaddr);
440int uv_destroy_owned_page(unsigned long paddr);
441int uv_convert_from_secure(unsigned long paddr);
442int uv_convert_owned_from_secure(unsigned long paddr);
443int gmap_convert_to_secure(struct gmap *gmap, unsigned long gaddr);
444
445void setup_uv(void);
446#else
447#define is_prot_virt_host() 0
448static inline void setup_uv(void) {}
449
450static inline int uv_destroy_owned_page(unsigned long paddr)
451{
452 return 0;
453}
454
455static inline int uv_convert_from_secure(unsigned long paddr)
456{
457 return 0;
458}
459
460static inline int uv_convert_owned_from_secure(unsigned long paddr)
461{
462 return 0;
463}
464#endif
465
466#endif /* _ASM_S390_UV_H */