1 // SPDX-License-Identifier: GPL-2.0-only
5 #include <linux/delay.h>
48 	[IFS_NO_ERROR] = "SCAN no error",
50 	[IFS_INTERRUPTED_BEFORE_RENDEZVOUS] = "Interrupt occurred prior to SCAN coordination.",
52 	"Core Abort SCAN Response due to power management condition.",
55 	[IFS_CORE_NOT_CAPABLE_CURRENTLY] = "Core not capable of performing SCAN currently",
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",
67 		dev_info(dev, "CPU(s) %*pbl: SCAN operation did not start. %s\n",  in message_not_tested()
71 		dev_info(dev, "CPU(s) %*pbl: software timeout during scan\n",  in message_not_tested()
76 			 "Not all scan chunks were executed. Maximum forward progress retries exceeded");  in message_not_tested()
78 		dev_info(dev, "CPU(s) %*pbl: SCAN unknown status %llx\n",  in message_not_tested()
93 …dev_err(dev, "CPU(s) %*pbl: could not execute from loaded scan image. Batch: %02x version: 0x%x\n",  in message_fail()
94 			cpumask_pr_args(cpu_smt_mask(cpu)), ifsd->cur_batch, ifsd->loaded_version);  in message_fail()
98 	 * signature_error is set when the output from the scan chains does not  in message_fail()
106 			cpumask_pr_args(cpu_smt_mask(cpu)), ifsd->cur_batch, ifsd->loaded_version);  in message_fail()
114 	/* Signature for chunk is bad, or scan test failed */  in can_restart()
138  * Execute the scan. Called "simultaneously" on all threads of a core
152 	 * to this MSR (at most for activate.delay cycles). Then it  in doscan()
153 	 * starts scan of each requested chunk. The core scan happens  in doscan()
161 		/* Pass back the result of the scan */  in doscan()
188 	activate.delay = IFS_THREAD_WAIT;  in ifs_test_core()
191 	to_stop = ifsd->valid_chunks - 1;  in ifs_test_core()
193 	if (ifsd->generation) {  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()
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()
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()
366  * its sibling cpu. Once all sibling threads wake up, the scan test gets executed and
367  * wait for all sibling threads to finish the scan test.
375 	/* Prevent CPUs from being taken offline during the scan test */  in do_core_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()