1 // SPDX-License-Identifier: GPL-2.0
3  * steal/stolen time test
9 #include <time.h>
28 /* steal_time must have 64-byte alignment */
33 	GUEST_ASSERT(!(READ_ONCE(st->version) & 1));  in check_status()
34 	GUEST_ASSERT(READ_ONCE(st->flags) == 0);  in check_status()
35 	GUEST_ASSERT(READ_ONCE(st->preempted) == 0);  in check_status()
49 	WRITE_ONCE(guest_stolen_time[cpu], st->steal);  in guest_code()
50 	version = READ_ONCE(st->version);  in guest_code()
55 	GUEST_ASSERT(version < READ_ONCE(st->version));  in guest_code()
56 	WRITE_ONCE(guest_stolen_time[cpu], st->steal);  in guest_code()
72 	sync_global_to_guest(vcpu->vm, st_gva[i]);  in steal_time_init()
87 	pr_info("    steal:     %lld\n", st->steal);  in steal_time_dump()
88 	pr_info("    version:   %d\n", st->version);  in steal_time_dump()
89 	pr_info("    flags:     %d\n", st->flags);  in steal_time_dump()
90 	pr_info("    preempted: %d\n", st->preempted);  in steal_time_dump()
93 		pr_info("%d", st->u8_pad[i]);  in steal_time_dump()
96 		pr_info("%d", st->pad[i]);  in steal_time_dump()
102 /* PV_TIME_ST must have 64-byte alignment */
125 	GUEST_ASSERT(READ_ONCE(st->rev) == 0);  in check_status()
126 	GUEST_ASSERT(READ_ONCE(st->attr) == 0);  in check_status()
142 	GUEST_ASSERT(status != -1);  in guest_code()
149 	WRITE_ONCE(guest_stolen_time[cpu], st->st_time);  in guest_code()
153 	WRITE_ONCE(guest_stolen_time[cpu], st->st_time);  in guest_code()
169 	struct kvm_vm *vm = vcpu->vm;  in steal_time_init()
187 	TEST_ASSERT(ret == -1 && errno == EINVAL, "Bad IPA didn't report EINVAL");  in steal_time_init()
193 	TEST_ASSERT(ret == -1 && errno == EEXIST, "Set IPA twice without EEXIST");  in steal_time_init()
201 	pr_info("    rev:     %d\n", st->rev);  in steal_time_dump()
202 	pr_info("    attr:    %d\n", st->attr);  in steal_time_dump()
203 	pr_info("    st_time: %ld\n", st->st_time);  in steal_time_dump()
238 			    exit_reason_str(vcpu->run->exit_reason));  in run_vcpu()
255 	verbose = ac > 1 && (!strncmp(av[1], "-v", 3) || !strncmp(av[1], "--verbose", 10));  in main()
264 	/* Create a VM and an identity mapped memslot for the steal time structure */  in main()
273 	/* Run test on each VCPU */  in main()
279 		/* First VCPU run initializes steal-time */  in main()
282 		/* Second VCPU run, expect guest stolen time to be <= run_delay */  in main()
288 			    "Expected stolen time <= %ld, got %ld",  in main()
291 		/* Steal time from the VCPU. The steal time thread has the same CPU affinity as the VCPUs. */  in main()
296 		while (get_run_delay() - run_delay < MIN_RUN_DELAY_NS);  in main()
298 		run_delay = get_run_delay() - run_delay;  in main()
303 		/* Run VCPU again to confirm stolen time is consistent with run_delay */  in main()
306 		stolen_time = guest_stolen_time[i] - stolen_time;  in main()
308 			    "Expected stolen time >= %ld, got %ld",  in main()
312 			pr_info("VCPU%d: total-stolen-time=%ld test-stolen-time=%ld", i,  in main()
315 				pr_info(" (BONUS: guest test-stolen-time even exactly matches test-run_delay)");  in main()