1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Test code for the s390x kvm ucontrol interface 4 * 5 * Copyright IBM Corp. 2024 6 * 7 * Authors: 8 * Christoph Schlameuss <schlameuss@linux.ibm.com> 9 */ 10 #include "debug_print.h" 11 #include "kselftest_harness.h" 12 #include "kvm_util.h" 13 #include "processor.h" 14 #include "sie.h" 15 16 #include <linux/capability.h> 17 #include <linux/sizes.h> 18 19 #define PGM_SEGMENT_TRANSLATION 0x10 20 21 #define VM_MEM_SIZE (4 * SZ_1M) 22 #define VM_MEM_EXT_SIZE (2 * SZ_1M) 23 #define VM_MEM_MAX_M ((VM_MEM_SIZE + VM_MEM_EXT_SIZE) / SZ_1M) 24 25 /* so directly declare capget to check caps without libcap */ 26 int capget(cap_user_header_t header, cap_user_data_t data); 27 28 /** 29 * In order to create user controlled virtual machines on S390, 30 * check KVM_CAP_S390_UCONTROL and use the flag KVM_VM_S390_UCONTROL 31 * as privileged user (SYS_ADMIN). 32 */ 33 void require_ucontrol_admin(void) 34 { 35 struct __user_cap_data_struct data[_LINUX_CAPABILITY_U32S_3]; 36 struct __user_cap_header_struct hdr = { 37 .version = _LINUX_CAPABILITY_VERSION_3, 38 }; 39 int rc; 40 41 rc = capget(&hdr, data); 42 TEST_ASSERT_EQ(0, rc); 43 TEST_REQUIRE((data->effective & CAP_TO_MASK(CAP_SYS_ADMIN)) > 0); 44 45 TEST_REQUIRE(kvm_has_cap(KVM_CAP_S390_UCONTROL)); 46 } 47 48 /* Test program setting some registers and looping */ 49 extern char test_gprs_asm[]; 50 asm("test_gprs_asm:\n" 51 "xgr %r0, %r0\n" 52 "lgfi %r1,1\n" 53 "lgfi %r2,2\n" 54 "lgfi %r3,3\n" 55 "lgfi %r4,4\n" 56 "lgfi %r5,5\n" 57 "lgfi %r6,6\n" 58 "lgfi %r7,7\n" 59 "0:\n" 60 " diag 0,0,0x44\n" 61 " ahi %r0,1\n" 62 " j 0b\n" 63 ); 64 65 /* Test program manipulating memory */ 66 extern char test_mem_asm[]; 67 asm("test_mem_asm:\n" 68 "xgr %r0, %r0\n" 69 70 "0:\n" 71 " ahi %r0,1\n" 72 " st %r1,0(%r5,%r6)\n" 73 74 " xgr %r1,%r1\n" 75 " l %r1,0(%r5,%r6)\n" 76 " ahi %r0,1\n" 77 " diag 0,0,0x44\n" 78 79 " j 0b\n" 80 ); 81 82 /* Test program manipulating storage keys */ 83 extern char test_skey_asm[]; 84 asm("test_skey_asm:\n" 85 "xgr %r0, %r0\n" 86 87 "0:\n" 88 " ahi %r0,1\n" 89 " st %r1,0(%r5,%r6)\n" 90 91 " sske %r1,%r6\n" 92 " xgr %r1,%r1\n" 93 " iske %r1,%r6\n" 94 " ahi %r0,1\n" 95 " diag 0,0,0x44\n" 96 97 " rrbe %r1,%r6\n" 98 " iske %r1,%r6\n" 99 " ahi %r0,1\n" 100 " diag 0,0,0x44\n" 101 102 " j 0b\n" 103 ); 104 105 FIXTURE(uc_kvm) 106 { 107 struct kvm_s390_sie_block *sie_block; 108 struct kvm_run *run; 109 uintptr_t base_gpa; 110 uintptr_t code_gpa; 111 uintptr_t base_hva; 112 uintptr_t code_hva; 113 int kvm_run_size; 114 vm_paddr_t pgd; 115 void *vm_mem; 116 int vcpu_fd; 117 int kvm_fd; 118 int vm_fd; 119 }; 120 121 /** 122 * create VM with single vcpu, map kvm_run and SIE control block for easy access 123 */ 124 FIXTURE_SETUP(uc_kvm) 125 { 126 struct kvm_s390_vm_cpu_processor info; 127 int rc; 128 129 require_ucontrol_admin(); 130 131 self->kvm_fd = open_kvm_dev_path_or_exit(); 132 self->vm_fd = ioctl(self->kvm_fd, KVM_CREATE_VM, KVM_VM_S390_UCONTROL); 133 ASSERT_GE(self->vm_fd, 0); 134 135 kvm_device_attr_get(self->vm_fd, KVM_S390_VM_CPU_MODEL, 136 KVM_S390_VM_CPU_PROCESSOR, &info); 137 TH_LOG("create VM 0x%llx", info.cpuid); 138 139 self->vcpu_fd = ioctl(self->vm_fd, KVM_CREATE_VCPU, 0); 140 ASSERT_GE(self->vcpu_fd, 0); 141 142 self->kvm_run_size = ioctl(self->kvm_fd, KVM_GET_VCPU_MMAP_SIZE, NULL); 143 ASSERT_GE(self->kvm_run_size, sizeof(struct kvm_run)) 144 TH_LOG(KVM_IOCTL_ERROR(KVM_GET_VCPU_MMAP_SIZE, self->kvm_run_size)); 145 self->run = (struct kvm_run *)mmap(NULL, self->kvm_run_size, 146 PROT_READ | PROT_WRITE, MAP_SHARED, self->vcpu_fd, 0); 147 ASSERT_NE(self->run, MAP_FAILED); 148 /** 149 * For virtual cpus that have been created with S390 user controlled 150 * virtual machines, the resulting vcpu fd can be memory mapped at page 151 * offset KVM_S390_SIE_PAGE_OFFSET in order to obtain a memory map of 152 * the virtual cpu's hardware control block. 153 */ 154 self->sie_block = (struct kvm_s390_sie_block *)mmap(NULL, PAGE_SIZE, 155 PROT_READ | PROT_WRITE, MAP_SHARED, 156 self->vcpu_fd, KVM_S390_SIE_PAGE_OFFSET << PAGE_SHIFT); 157 ASSERT_NE(self->sie_block, MAP_FAILED); 158 159 TH_LOG("VM created %p %p", self->run, self->sie_block); 160 161 self->base_gpa = 0; 162 self->code_gpa = self->base_gpa + (3 * SZ_1M); 163 164 self->vm_mem = aligned_alloc(SZ_1M, VM_MEM_MAX_M * SZ_1M); 165 ASSERT_NE(NULL, self->vm_mem) TH_LOG("malloc failed %u", errno); 166 self->base_hva = (uintptr_t)self->vm_mem; 167 self->code_hva = self->base_hva - self->base_gpa + self->code_gpa; 168 struct kvm_s390_ucas_mapping map = { 169 .user_addr = self->base_hva, 170 .vcpu_addr = self->base_gpa, 171 .length = VM_MEM_SIZE, 172 }; 173 TH_LOG("ucas map %p %p 0x%llx", 174 (void *)map.user_addr, (void *)map.vcpu_addr, map.length); 175 rc = ioctl(self->vcpu_fd, KVM_S390_UCAS_MAP, &map); 176 ASSERT_EQ(0, rc) TH_LOG("ucas map result %d not expected, %s", 177 rc, strerror(errno)); 178 179 TH_LOG("page in %p", (void *)self->base_gpa); 180 rc = ioctl(self->vcpu_fd, KVM_S390_VCPU_FAULT, self->base_gpa); 181 ASSERT_EQ(0, rc) TH_LOG("vcpu fault (%p) result %d not expected, %s", 182 (void *)self->base_hva, rc, strerror(errno)); 183 184 self->sie_block->cpuflags &= ~CPUSTAT_STOPPED; 185 } 186 187 FIXTURE_TEARDOWN(uc_kvm) 188 { 189 munmap(self->sie_block, PAGE_SIZE); 190 munmap(self->run, self->kvm_run_size); 191 close(self->vcpu_fd); 192 close(self->vm_fd); 193 close(self->kvm_fd); 194 free(self->vm_mem); 195 } 196 197 TEST_F(uc_kvm, uc_sie_assertions) 198 { 199 /* assert interception of Code 08 (Program Interruption) is set */ 200 EXPECT_EQ(0, self->sie_block->ecb & ECB_SPECI); 201 } 202 203 TEST_F(uc_kvm, uc_attr_mem_limit) 204 { 205 u64 limit; 206 struct kvm_device_attr attr = { 207 .group = KVM_S390_VM_MEM_CTRL, 208 .attr = KVM_S390_VM_MEM_LIMIT_SIZE, 209 .addr = (u64)&limit, 210 }; 211 int rc; 212 213 rc = ioctl(self->vm_fd, KVM_HAS_DEVICE_ATTR, &attr); 214 EXPECT_EQ(0, rc); 215 216 rc = ioctl(self->vm_fd, KVM_GET_DEVICE_ATTR, &attr); 217 EXPECT_EQ(0, rc); 218 EXPECT_EQ(~0UL, limit); 219 220 /* assert set not supported */ 221 rc = ioctl(self->vm_fd, KVM_SET_DEVICE_ATTR, &attr); 222 EXPECT_EQ(-1, rc); 223 EXPECT_EQ(EINVAL, errno); 224 } 225 226 TEST_F(uc_kvm, uc_no_dirty_log) 227 { 228 struct kvm_dirty_log dlog; 229 int rc; 230 231 rc = ioctl(self->vm_fd, KVM_GET_DIRTY_LOG, &dlog); 232 EXPECT_EQ(-1, rc); 233 EXPECT_EQ(EINVAL, errno); 234 } 235 236 /** 237 * Assert HPAGE CAP cannot be enabled on UCONTROL VM 238 */ 239 TEST(uc_cap_hpage) 240 { 241 int rc, kvm_fd, vm_fd, vcpu_fd; 242 struct kvm_enable_cap cap = { 243 .cap = KVM_CAP_S390_HPAGE_1M, 244 }; 245 246 require_ucontrol_admin(); 247 248 kvm_fd = open_kvm_dev_path_or_exit(); 249 vm_fd = ioctl(kvm_fd, KVM_CREATE_VM, KVM_VM_S390_UCONTROL); 250 ASSERT_GE(vm_fd, 0); 251 252 /* assert hpages are not supported on ucontrol vm */ 253 rc = ioctl(vm_fd, KVM_CHECK_EXTENSION, KVM_CAP_S390_HPAGE_1M); 254 EXPECT_EQ(0, rc); 255 256 /* Test that KVM_CAP_S390_HPAGE_1M can't be enabled for a ucontrol vm */ 257 rc = ioctl(vm_fd, KVM_ENABLE_CAP, cap); 258 EXPECT_EQ(-1, rc); 259 EXPECT_EQ(EINVAL, errno); 260 261 /* assert HPAGE CAP is rejected after vCPU creation */ 262 vcpu_fd = ioctl(vm_fd, KVM_CREATE_VCPU, 0); 263 ASSERT_GE(vcpu_fd, 0); 264 rc = ioctl(vm_fd, KVM_ENABLE_CAP, cap); 265 EXPECT_EQ(-1, rc); 266 EXPECT_EQ(EBUSY, errno); 267 268 close(vcpu_fd); 269 close(vm_fd); 270 close(kvm_fd); 271 } 272 273 /* calculate host virtual addr from guest physical addr */ 274 static void *gpa2hva(FIXTURE_DATA(uc_kvm) *self, u64 gpa) 275 { 276 return (void *)(self->base_hva - self->base_gpa + gpa); 277 } 278 279 /* map / make additional memory available */ 280 static int uc_map_ext(FIXTURE_DATA(uc_kvm) *self, u64 vcpu_addr, u64 length) 281 { 282 struct kvm_s390_ucas_mapping map = { 283 .user_addr = (u64)gpa2hva(self, vcpu_addr), 284 .vcpu_addr = vcpu_addr, 285 .length = length, 286 }; 287 pr_info("ucas map %p %p 0x%llx", 288 (void *)map.user_addr, (void *)map.vcpu_addr, map.length); 289 return ioctl(self->vcpu_fd, KVM_S390_UCAS_MAP, &map); 290 } 291 292 /* unmap previously mapped memory */ 293 static int uc_unmap_ext(FIXTURE_DATA(uc_kvm) *self, u64 vcpu_addr, u64 length) 294 { 295 struct kvm_s390_ucas_mapping map = { 296 .user_addr = (u64)gpa2hva(self, vcpu_addr), 297 .vcpu_addr = vcpu_addr, 298 .length = length, 299 }; 300 pr_info("ucas unmap %p %p 0x%llx", 301 (void *)map.user_addr, (void *)map.vcpu_addr, map.length); 302 return ioctl(self->vcpu_fd, KVM_S390_UCAS_UNMAP, &map); 303 } 304 305 /* handle ucontrol exit by mapping the accessed segment */ 306 static void uc_handle_exit_ucontrol(FIXTURE_DATA(uc_kvm) *self) 307 { 308 struct kvm_run *run = self->run; 309 u64 seg_addr; 310 int rc; 311 312 TEST_ASSERT_EQ(KVM_EXIT_S390_UCONTROL, run->exit_reason); 313 switch (run->s390_ucontrol.pgm_code) { 314 case PGM_SEGMENT_TRANSLATION: 315 seg_addr = run->s390_ucontrol.trans_exc_code & ~(SZ_1M - 1); 316 pr_info("ucontrol pic segment translation 0x%llx, mapping segment 0x%lx\n", 317 run->s390_ucontrol.trans_exc_code, seg_addr); 318 /* map / make additional memory available */ 319 rc = uc_map_ext(self, seg_addr, SZ_1M); 320 TEST_ASSERT_EQ(0, rc); 321 break; 322 default: 323 TEST_FAIL("UNEXPECTED PGM CODE %d", run->s390_ucontrol.pgm_code); 324 } 325 } 326 327 /* 328 * Handle the SIEIC exit 329 * * fail on codes not expected in the test cases 330 * Returns if interception is handled / execution can be continued 331 */ 332 static void uc_skey_enable(FIXTURE_DATA(uc_kvm) *self) 333 { 334 struct kvm_s390_sie_block *sie_block = self->sie_block; 335 336 /* disable KSS */ 337 sie_block->cpuflags &= ~CPUSTAT_KSS; 338 /* disable skey inst interception */ 339 sie_block->ictl &= ~(ICTL_ISKE | ICTL_SSKE | ICTL_RRBE); 340 } 341 342 /* 343 * Handle the instruction intercept 344 * Returns if interception is handled / execution can be continued 345 */ 346 static bool uc_handle_insn_ic(FIXTURE_DATA(uc_kvm) *self) 347 { 348 struct kvm_s390_sie_block *sie_block = self->sie_block; 349 int ilen = insn_length(sie_block->ipa >> 8); 350 struct kvm_run *run = self->run; 351 352 switch (run->s390_sieic.ipa) { 353 case 0xB229: /* ISKE */ 354 case 0xB22b: /* SSKE */ 355 case 0xB22a: /* RRBE */ 356 uc_skey_enable(self); 357 358 /* rewind to reexecute intercepted instruction */ 359 run->psw_addr = run->psw_addr - ilen; 360 pr_info("rewind guest addr to 0x%.16llx\n", run->psw_addr); 361 return true; 362 default: 363 return false; 364 } 365 } 366 367 /* 368 * Handle the SIEIC exit 369 * * fail on codes not expected in the test cases 370 * Returns if interception is handled / execution can be continued 371 */ 372 static bool uc_handle_sieic(FIXTURE_DATA(uc_kvm) *self) 373 { 374 struct kvm_s390_sie_block *sie_block = self->sie_block; 375 struct kvm_run *run = self->run; 376 377 /* check SIE interception code */ 378 pr_info("sieic: 0x%.2x 0x%.4x 0x%.8x\n", 379 run->s390_sieic.icptcode, 380 run->s390_sieic.ipa, 381 run->s390_sieic.ipb); 382 switch (run->s390_sieic.icptcode) { 383 case ICPT_INST: 384 /* end execution in caller on intercepted instruction */ 385 pr_info("sie instruction interception\n"); 386 return uc_handle_insn_ic(self); 387 case ICPT_KSS: 388 uc_skey_enable(self); 389 return true; 390 case ICPT_OPEREXC: 391 /* operation exception */ 392 TEST_FAIL("sie exception on %.4x%.8x", sie_block->ipa, sie_block->ipb); 393 default: 394 TEST_FAIL("UNEXPECTED SIEIC CODE %d", run->s390_sieic.icptcode); 395 } 396 return true; 397 } 398 399 /* verify VM state on exit */ 400 static bool uc_handle_exit(FIXTURE_DATA(uc_kvm) *self) 401 { 402 struct kvm_run *run = self->run; 403 404 switch (run->exit_reason) { 405 case KVM_EXIT_S390_UCONTROL: 406 /** check program interruption code 407 * handle page fault --> ucas map 408 */ 409 uc_handle_exit_ucontrol(self); 410 break; 411 case KVM_EXIT_S390_SIEIC: 412 return uc_handle_sieic(self); 413 default: 414 pr_info("exit_reason %2d not handled\n", run->exit_reason); 415 } 416 return true; 417 } 418 419 /* run the VM until interrupted */ 420 static int uc_run_once(FIXTURE_DATA(uc_kvm) *self) 421 { 422 int rc; 423 424 rc = ioctl(self->vcpu_fd, KVM_RUN, NULL); 425 print_run(self->run, self->sie_block); 426 print_regs(self->run); 427 pr_debug("run %d / %d %s\n", rc, errno, strerror(errno)); 428 return rc; 429 } 430 431 static void uc_assert_diag44(FIXTURE_DATA(uc_kvm) *self) 432 { 433 struct kvm_s390_sie_block *sie_block = self->sie_block; 434 435 /* assert vm was interrupted by diag 0x0044 */ 436 TEST_ASSERT_EQ(KVM_EXIT_S390_SIEIC, self->run->exit_reason); 437 TEST_ASSERT_EQ(ICPT_INST, sie_block->icptcode); 438 TEST_ASSERT_EQ(0x8300, sie_block->ipa); 439 TEST_ASSERT_EQ(0x440000, sie_block->ipb); 440 } 441 442 TEST_F(uc_kvm, uc_no_user_region) 443 { 444 struct kvm_userspace_memory_region region = { 445 .slot = 1, 446 .guest_phys_addr = self->code_gpa, 447 .memory_size = VM_MEM_EXT_SIZE, 448 .userspace_addr = (uintptr_t)self->code_hva, 449 }; 450 struct kvm_userspace_memory_region2 region2 = { 451 .slot = 1, 452 .guest_phys_addr = self->code_gpa, 453 .memory_size = VM_MEM_EXT_SIZE, 454 .userspace_addr = (uintptr_t)self->code_hva, 455 }; 456 457 ASSERT_EQ(-1, ioctl(self->vm_fd, KVM_SET_USER_MEMORY_REGION, ®ion)); 458 ASSERT_TRUE(errno == EEXIST || errno == EINVAL) 459 TH_LOG("errno %s (%i) not expected for ioctl KVM_SET_USER_MEMORY_REGION", 460 strerror(errno), errno); 461 462 ASSERT_EQ(-1, ioctl(self->vm_fd, KVM_SET_USER_MEMORY_REGION2, ®ion2)); 463 ASSERT_TRUE(errno == EEXIST || errno == EINVAL) 464 TH_LOG("errno %s (%i) not expected for ioctl KVM_SET_USER_MEMORY_REGION2", 465 strerror(errno), errno); 466 } 467 468 TEST_F(uc_kvm, uc_map_unmap) 469 { 470 struct kvm_sync_regs *sync_regs = &self->run->s.regs; 471 struct kvm_run *run = self->run; 472 const u64 disp = 1; 473 int rc; 474 475 /* copy test_mem_asm to code_hva / code_gpa */ 476 TH_LOG("copy code %p to vm mapped memory %p / %p", 477 &test_mem_asm, (void *)self->code_hva, (void *)self->code_gpa); 478 memcpy((void *)self->code_hva, &test_mem_asm, PAGE_SIZE); 479 480 /* DAT disabled + 64 bit mode */ 481 run->psw_mask = 0x0000000180000000ULL; 482 run->psw_addr = self->code_gpa; 483 484 /* set register content for test_mem_asm to access not mapped memory*/ 485 sync_regs->gprs[1] = 0x55; 486 sync_regs->gprs[5] = self->base_gpa; 487 sync_regs->gprs[6] = VM_MEM_SIZE + disp; 488 run->kvm_dirty_regs |= KVM_SYNC_GPRS; 489 490 /* run and expect to fail with ucontrol pic segment translation */ 491 ASSERT_EQ(0, uc_run_once(self)); 492 ASSERT_EQ(1, sync_regs->gprs[0]); 493 ASSERT_EQ(KVM_EXIT_S390_UCONTROL, run->exit_reason); 494 495 ASSERT_EQ(PGM_SEGMENT_TRANSLATION, run->s390_ucontrol.pgm_code); 496 ASSERT_EQ(self->base_gpa + VM_MEM_SIZE, run->s390_ucontrol.trans_exc_code); 497 498 /* fail to map memory with not segment aligned address */ 499 rc = uc_map_ext(self, self->base_gpa + VM_MEM_SIZE + disp, VM_MEM_EXT_SIZE); 500 ASSERT_GT(0, rc) 501 TH_LOG("ucas map for non segment address should fail but didn't; " 502 "result %d not expected, %s", rc, strerror(errno)); 503 504 /* map / make additional memory available */ 505 rc = uc_map_ext(self, self->base_gpa + VM_MEM_SIZE, VM_MEM_EXT_SIZE); 506 ASSERT_EQ(0, rc) 507 TH_LOG("ucas map result %d not expected, %s", rc, strerror(errno)); 508 ASSERT_EQ(0, uc_run_once(self)); 509 ASSERT_EQ(false, uc_handle_exit(self)); 510 uc_assert_diag44(self); 511 512 /* assert registers and memory are in expected state */ 513 ASSERT_EQ(2, sync_regs->gprs[0]); 514 ASSERT_EQ(0x55, sync_regs->gprs[1]); 515 ASSERT_EQ(0x55, *(u32 *)gpa2hva(self, self->base_gpa + VM_MEM_SIZE + disp)); 516 517 /* unmap and run loop again */ 518 rc = uc_unmap_ext(self, self->base_gpa + VM_MEM_SIZE, VM_MEM_EXT_SIZE); 519 ASSERT_EQ(0, rc) 520 TH_LOG("ucas unmap result %d not expected, %s", rc, strerror(errno)); 521 ASSERT_EQ(0, uc_run_once(self)); 522 ASSERT_EQ(3, sync_regs->gprs[0]); 523 ASSERT_EQ(KVM_EXIT_S390_UCONTROL, run->exit_reason); 524 ASSERT_EQ(PGM_SEGMENT_TRANSLATION, run->s390_ucontrol.pgm_code); 525 /* handle ucontrol exit and remap memory after previous map and unmap */ 526 ASSERT_EQ(true, uc_handle_exit(self)); 527 } 528 529 TEST_F(uc_kvm, uc_gprs) 530 { 531 struct kvm_sync_regs *sync_regs = &self->run->s.regs; 532 struct kvm_run *run = self->run; 533 struct kvm_regs regs = {}; 534 535 /* Set registers to values that are different from the ones that we expect below */ 536 for (int i = 0; i < 8; i++) 537 sync_regs->gprs[i] = 8; 538 run->kvm_dirty_regs |= KVM_SYNC_GPRS; 539 540 /* copy test_gprs_asm to code_hva / code_gpa */ 541 TH_LOG("copy code %p to vm mapped memory %p / %p", 542 &test_gprs_asm, (void *)self->code_hva, (void *)self->code_gpa); 543 memcpy((void *)self->code_hva, &test_gprs_asm, PAGE_SIZE); 544 545 /* DAT disabled + 64 bit mode */ 546 run->psw_mask = 0x0000000180000000ULL; 547 run->psw_addr = self->code_gpa; 548 549 /* run and expect interception of diag 44 */ 550 ASSERT_EQ(0, uc_run_once(self)); 551 ASSERT_EQ(false, uc_handle_exit(self)); 552 uc_assert_diag44(self); 553 554 /* Retrieve and check guest register values */ 555 ASSERT_EQ(0, ioctl(self->vcpu_fd, KVM_GET_REGS, ®s)); 556 for (int i = 0; i < 8; i++) { 557 ASSERT_EQ(i, regs.gprs[i]); 558 ASSERT_EQ(i, sync_regs->gprs[i]); 559 } 560 561 /* run and expect interception of diag 44 again */ 562 ASSERT_EQ(0, uc_run_once(self)); 563 ASSERT_EQ(false, uc_handle_exit(self)); 564 uc_assert_diag44(self); 565 566 /* check continued increment of register 0 value */ 567 ASSERT_EQ(0, ioctl(self->vcpu_fd, KVM_GET_REGS, ®s)); 568 ASSERT_EQ(1, regs.gprs[0]); 569 ASSERT_EQ(1, sync_regs->gprs[0]); 570 } 571 572 TEST_F(uc_kvm, uc_skey) 573 { 574 struct kvm_s390_sie_block *sie_block = self->sie_block; 575 struct kvm_sync_regs *sync_regs = &self->run->s.regs; 576 u64 test_vaddr = VM_MEM_SIZE - (SZ_1M / 2); 577 struct kvm_run *run = self->run; 578 const u8 skeyvalue = 0x34; 579 580 /* copy test_skey_asm to code_hva / code_gpa */ 581 TH_LOG("copy code %p to vm mapped memory %p / %p", 582 &test_skey_asm, (void *)self->code_hva, (void *)self->code_gpa); 583 memcpy((void *)self->code_hva, &test_skey_asm, PAGE_SIZE); 584 585 /* set register content for test_skey_asm to access not mapped memory */ 586 sync_regs->gprs[1] = skeyvalue; 587 sync_regs->gprs[5] = self->base_gpa; 588 sync_regs->gprs[6] = test_vaddr; 589 run->kvm_dirty_regs |= KVM_SYNC_GPRS; 590 591 /* DAT disabled + 64 bit mode */ 592 run->psw_mask = 0x0000000180000000ULL; 593 run->psw_addr = self->code_gpa; 594 595 ASSERT_EQ(0, uc_run_once(self)); 596 ASSERT_EQ(true, uc_handle_exit(self)); 597 ASSERT_EQ(1, sync_regs->gprs[0]); 598 599 /* SSKE + ISKE */ 600 sync_regs->gprs[1] = skeyvalue; 601 run->kvm_dirty_regs |= KVM_SYNC_GPRS; 602 ASSERT_EQ(0, uc_run_once(self)); 603 604 /* 605 * Bail out and skip the test after uc_skey_enable was executed but iske 606 * is still intercepted. Instructions are not handled by the kernel. 607 * Thus there is no need to test this here. 608 */ 609 TEST_ASSERT_EQ(0, sie_block->cpuflags & CPUSTAT_KSS); 610 TEST_ASSERT_EQ(0, sie_block->ictl & (ICTL_ISKE | ICTL_SSKE | ICTL_RRBE)); 611 TEST_ASSERT_EQ(KVM_EXIT_S390_SIEIC, self->run->exit_reason); 612 TEST_ASSERT_EQ(ICPT_INST, sie_block->icptcode); 613 TEST_REQUIRE(sie_block->ipa != 0xb22b); 614 615 /* SSKE + ISKE contd. */ 616 ASSERT_EQ(false, uc_handle_exit(self)); 617 ASSERT_EQ(2, sync_regs->gprs[0]); 618 ASSERT_EQ(skeyvalue, sync_regs->gprs[1]); 619 uc_assert_diag44(self); 620 621 /* RRBE + ISKE */ 622 sync_regs->gprs[1] = skeyvalue; 623 run->kvm_dirty_regs |= KVM_SYNC_GPRS; 624 ASSERT_EQ(0, uc_run_once(self)); 625 ASSERT_EQ(false, uc_handle_exit(self)); 626 ASSERT_EQ(3, sync_regs->gprs[0]); 627 /* assert R reset but rest of skey unchanged */ 628 ASSERT_EQ(skeyvalue & 0xfa, sync_regs->gprs[1]); 629 ASSERT_EQ(0, sync_regs->gprs[1] & 0x04); 630 uc_assert_diag44(self); 631 } 632 633 static char uc_flic_b[PAGE_SIZE]; 634 static struct kvm_s390_io_adapter uc_flic_ioa = { .id = 0 }; 635 static struct kvm_s390_io_adapter_req uc_flic_ioam = { .id = 0 }; 636 static struct kvm_s390_ais_req uc_flic_asim = { .isc = 0 }; 637 static struct kvm_s390_ais_all uc_flic_asima = { .simm = 0 }; 638 static struct uc_flic_attr_test { 639 char *name; 640 struct kvm_device_attr a; 641 int hasrc; 642 int geterrno; 643 int seterrno; 644 } uc_flic_attr_tests[] = { 645 { 646 .name = "KVM_DEV_FLIC_GET_ALL_IRQS", 647 .seterrno = EINVAL, 648 .a = { 649 .group = KVM_DEV_FLIC_GET_ALL_IRQS, 650 .addr = (u64)&uc_flic_b, 651 .attr = PAGE_SIZE, 652 }, 653 }, 654 { 655 .name = "KVM_DEV_FLIC_ENQUEUE", 656 .geterrno = EINVAL, 657 .a = { .group = KVM_DEV_FLIC_ENQUEUE, }, 658 }, 659 { 660 .name = "KVM_DEV_FLIC_CLEAR_IRQS", 661 .geterrno = EINVAL, 662 .a = { .group = KVM_DEV_FLIC_CLEAR_IRQS, }, 663 }, 664 { 665 .name = "KVM_DEV_FLIC_ADAPTER_REGISTER", 666 .geterrno = EINVAL, 667 .a = { 668 .group = KVM_DEV_FLIC_ADAPTER_REGISTER, 669 .addr = (u64)&uc_flic_ioa, 670 }, 671 }, 672 { 673 .name = "KVM_DEV_FLIC_ADAPTER_MODIFY", 674 .geterrno = EINVAL, 675 .seterrno = EINVAL, 676 .a = { 677 .group = KVM_DEV_FLIC_ADAPTER_MODIFY, 678 .addr = (u64)&uc_flic_ioam, 679 .attr = sizeof(uc_flic_ioam), 680 }, 681 }, 682 { 683 .name = "KVM_DEV_FLIC_CLEAR_IO_IRQ", 684 .geterrno = EINVAL, 685 .seterrno = EINVAL, 686 .a = { 687 .group = KVM_DEV_FLIC_CLEAR_IO_IRQ, 688 .attr = 32, 689 }, 690 }, 691 { 692 .name = "KVM_DEV_FLIC_AISM", 693 .geterrno = EINVAL, 694 .seterrno = ENOTSUP, 695 .a = { 696 .group = KVM_DEV_FLIC_AISM, 697 .addr = (u64)&uc_flic_asim, 698 }, 699 }, 700 { 701 .name = "KVM_DEV_FLIC_AIRQ_INJECT", 702 .geterrno = EINVAL, 703 .a = { .group = KVM_DEV_FLIC_AIRQ_INJECT, }, 704 }, 705 { 706 .name = "KVM_DEV_FLIC_AISM_ALL", 707 .geterrno = ENOTSUP, 708 .seterrno = ENOTSUP, 709 .a = { 710 .group = KVM_DEV_FLIC_AISM_ALL, 711 .addr = (u64)&uc_flic_asima, 712 .attr = sizeof(uc_flic_asima), 713 }, 714 }, 715 { 716 .name = "KVM_DEV_FLIC_APF_ENABLE", 717 .geterrno = EINVAL, 718 .seterrno = EINVAL, 719 .a = { .group = KVM_DEV_FLIC_APF_ENABLE, }, 720 }, 721 { 722 .name = "KVM_DEV_FLIC_APF_DISABLE_WAIT", 723 .geterrno = EINVAL, 724 .seterrno = EINVAL, 725 .a = { .group = KVM_DEV_FLIC_APF_DISABLE_WAIT, }, 726 }, 727 }; 728 729 TEST_F(uc_kvm, uc_flic_attrs) 730 { 731 struct kvm_create_device cd = { .type = KVM_DEV_TYPE_FLIC }; 732 struct kvm_device_attr attr; 733 u64 value; 734 int rc, i; 735 736 rc = ioctl(self->vm_fd, KVM_CREATE_DEVICE, &cd); 737 ASSERT_EQ(0, rc) TH_LOG("create device failed with err %s (%i)", 738 strerror(errno), errno); 739 740 for (i = 0; i < ARRAY_SIZE(uc_flic_attr_tests); i++) { 741 TH_LOG("test %s", uc_flic_attr_tests[i].name); 742 attr = (struct kvm_device_attr) { 743 .group = uc_flic_attr_tests[i].a.group, 744 .attr = uc_flic_attr_tests[i].a.attr, 745 .addr = uc_flic_attr_tests[i].a.addr, 746 }; 747 if (attr.addr == 0) 748 attr.addr = (u64)&value; 749 750 rc = ioctl(cd.fd, KVM_HAS_DEVICE_ATTR, &attr); 751 EXPECT_EQ(uc_flic_attr_tests[i].hasrc, !!rc) 752 TH_LOG("expected dev attr missing %s", 753 uc_flic_attr_tests[i].name); 754 755 rc = ioctl(cd.fd, KVM_GET_DEVICE_ATTR, &attr); 756 EXPECT_EQ(!!uc_flic_attr_tests[i].geterrno, !!rc) 757 TH_LOG("get dev attr rc not expected on %s %s (%i)", 758 uc_flic_attr_tests[i].name, 759 strerror(errno), errno); 760 if (uc_flic_attr_tests[i].geterrno) 761 EXPECT_EQ(uc_flic_attr_tests[i].geterrno, errno) 762 TH_LOG("get dev attr errno not expected on %s %s (%i)", 763 uc_flic_attr_tests[i].name, 764 strerror(errno), errno); 765 766 rc = ioctl(cd.fd, KVM_SET_DEVICE_ATTR, &attr); 767 EXPECT_EQ(!!uc_flic_attr_tests[i].seterrno, !!rc) 768 TH_LOG("set sev attr rc not expected on %s %s (%i)", 769 uc_flic_attr_tests[i].name, 770 strerror(errno), errno); 771 if (uc_flic_attr_tests[i].seterrno) 772 EXPECT_EQ(uc_flic_attr_tests[i].seterrno, errno) 773 TH_LOG("set dev attr errno not expected on %s %s (%i)", 774 uc_flic_attr_tests[i].name, 775 strerror(errno), errno); 776 } 777 778 close(cd.fd); 779 } 780 781 TEST_F(uc_kvm, uc_set_gsi_routing) 782 { 783 struct kvm_irq_routing *routing = kvm_gsi_routing_create(); 784 struct kvm_irq_routing_entry ue = { 785 .type = KVM_IRQ_ROUTING_S390_ADAPTER, 786 .gsi = 1, 787 .u.adapter = (struct kvm_irq_routing_s390_adapter) { 788 .ind_addr = 0, 789 }, 790 }; 791 int rc; 792 793 routing->entries[0] = ue; 794 routing->nr = 1; 795 rc = ioctl(self->vm_fd, KVM_SET_GSI_ROUTING, routing); 796 ASSERT_EQ(-1, rc) TH_LOG("err %s (%i)", strerror(errno), errno); 797 ASSERT_EQ(EINVAL, errno) TH_LOG("err %s (%i)", strerror(errno), errno); 798 } 799 800 TEST_HARNESS_MAIN 801