1 // SPDX-License-Identifier: GPL-2.0-only
50 	[IFS_INTERRUPTED_BEFORE_RENDEZVOUS] = "Interrupt occurred prior to SCAN coordination.",
52 	"Core Abort SCAN Response due to power management condition.",
58 	"Exceeded number of Logical Processors (LP) allowed to run Scan-At-Field concurrently",
59 	[IFS_INTERRUPTED_DURING_EXECUTION] = "Interrupt occurred prior to SCAN start",
61 	[IFS_CORRUPTED_CHUNK] = "Scan operation aborted due to corrupted image. Try reloading",
94 			cpumask_pr_args(cpu_smt_mask(cpu)), ifsd->cur_batch, ifsd->loaded_version);  in message_fail()
100 	 * due to a bit flip from an alpha particle or neutron). If the problem  in message_fail()
106 			cpumask_pr_args(cpu_smt_mask(cpu)), ifsd->cur_batch, ifsd->loaded_version);  in message_fail()
151 	 * This WRMSR will wait for other HT threads to also write  in doscan()
152 	 * to this MSR (at most for activate.delay cycles). Then it  in doscan()
155 	 * take up to 200 milliseconds (in the case where all chunks  in doscan()
169  * Use stop_core_cpuslocked() to synchronize writing to MSR_ACTIVATE_SCAN
170  * on all threads of the core to be tested. Loop if necessary to complete
171  * run of all chunks. Include some defensive tests to make sure forward
176 	union ifs_scan activate;  in ifs_test_core()  local
187 	activate.gen0.rsvd = 0;  in ifs_test_core()
188 	activate.delay = IFS_THREAD_WAIT;  in ifs_test_core()
189 	activate.sigmce = 0;  in ifs_test_core()
191 	to_stop = ifsd->valid_chunks - 1;  in ifs_test_core()
193 	if (ifsd->generation) {  in ifs_test_core()
194 		activate.gen2.start = to_start;  in ifs_test_core()
195 		activate.gen2.stop = to_stop;  in ifs_test_core()
197 		activate.gen0.start = to_start;  in ifs_test_core()
198 		activate.gen0.stop = to_stop;  in ifs_test_core()
210 		msrvals[0] = activate.data;  in ifs_test_core()
221 		status_chunk = ifsd->generation ? status.gen2.chunk_num : status.gen0.chunk_num;  in ifs_test_core()
224 			if (--retries == 0) {  in ifs_test_core()
231 			if (ifsd->generation)  in ifs_test_core()
232 				activate.gen2.start = status_chunk;  in ifs_test_core()
234 				activate.gen0.start = status_chunk;  in ifs_test_core()
240 	ifsd->scan_details = status.data;  in ifs_test_core()
243 		ifsd->status = SCAN_TEST_FAIL;  in ifs_test_core()
246 		ifsd->status = SCAN_NOT_TESTED;  in ifs_test_core()
249 		ifsd->status = SCAN_TEST_PASS;  in ifs_test_core()
270 		timeout -= SPINUNIT;  in wait_for_sibling_cpu()
282 	 * Only one logical CPU on a core needs to trigger the Array test via MSR write.  in do_array_test()
287 		wrmsrl(MSR_ARRAY_BIST, command->data);  in do_array_test()
289 		rdmsrl(MSR_ARRAY_BIST, command->data);  in do_array_test()
322 	ifsd->scan_details = command.data;  in ifs_array_test_core()
325 		ifsd->status = SCAN_TEST_FAIL;  in ifs_array_test_core()
327 		ifsd->status = SCAN_NOT_TESTED;  in ifs_array_test_core()
329 		ifsd->status = SCAN_TEST_PASS;  in ifs_array_test_core()
356 	ifsd->scan_details = status;  in ifs_array_test_gen1()
359 		ifsd->status = SCAN_TEST_FAIL;  in ifs_array_test_gen1()
361 		ifsd->status = SCAN_TEST_PASS;  in ifs_array_test_gen1()
367  * wait for all sibling threads to finish the scan test.
380 		ret = -EINVAL;  in do_core_test()
384 	switch (test->test_num) {  in do_core_test()
386 		if (!ifsd->loaded)  in do_core_test()
387 			ret = -EPERM;  in do_core_test()
392 		if (ifsd->array_gen == ARRAY_GEN0)  in do_core_test()
398 		ret = -EINVAL;  in do_core_test()