1 // SPDX-License-Identifier: GPL-2.0
3  * CPU-Measurement Counter Facility Support - Common Layer
21 /* Per-CPU event structure for the counter facility */
30 	.alert = ATOMIC64_INIT(0),
38 /* Indicator whether the CPU-Measurement Counter Facility Support is ready */
41 /* CPU-measurement alerts for the counter facility */
43 				    unsigned int alert, unsigned long unused)  in cpumf_measurement_alert()  argument
47 	if (!(alert & CPU_MF_INT_CF_MASK))  in cpumf_measurement_alert()
55 	if (!(cpuhw->flags & PMU_F_RESERVED))  in cpumf_measurement_alert()
58 	/* counter authorization change alert */  in cpumf_measurement_alert()
59 	if (alert & CPU_MF_INT_CF_CACA)  in cpumf_measurement_alert()
60 		qctri(&cpuhw->info);  in cpumf_measurement_alert()
62 	/* loss of counter data alert */  in cpumf_measurement_alert()
63 	if (alert & CPU_MF_INT_CF_LCDA)  in cpumf_measurement_alert()
66 	/* loss of MT counter data alert */  in cpumf_measurement_alert()
67 	if (alert & CPU_MF_INT_CF_MTDA)  in cpumf_measurement_alert()
71 	/* store alert for special handling by in-kernel users */  in cpumf_measurement_alert()
72 	atomic64_or(alert, &cpuhw->alert);  in cpumf_measurement_alert()
83 		memset(&cpuhw->info, 0, sizeof(cpuhw->info));  in cpum_cf_setup_cpu()
84 		qctri(&cpuhw->info);  in cpum_cf_setup_cpu()
85 		cpuhw->flags |= PMU_F_RESERVED;  in cpum_cf_setup_cpu()
89 		cpuhw->flags &= ~PMU_F_RESERVED;  in cpum_cf_setup_cpu()
103 /* Initialize the CPU-measurement counter facility */
115 /* Obtain the CPU-measurement alerts for the counter facility */
119 	unsigned long alert;  in kernel_cpumcf_alert()  local
121 	alert = atomic64_read(&cpuhw->alert);  in kernel_cpumcf_alert()
123 		atomic64_set(&cpuhw->alert, 0);  in kernel_cpumcf_alert()
125 	return alert;  in kernel_cpumcf_alert()
129 /* Release the CPU-measurement counter facility */
169 		if (info->cfvn >= 1)  in cpum_cf_ctrset_size()
173 		if (info->cfvn == 1)  in cpum_cf_ctrset_size()
175 		else if (info->cfvn >= 3)  in cpum_cf_ctrset_size()
179 		if (info->csvn >= 1 && info->csvn <= 5)  in cpum_cf_ctrset_size()
181 		else if (info->csvn == 6 || info->csvn == 7)  in cpum_cf_ctrset_size()
185 		if (info->csvn == 1)  in cpum_cf_ctrset_size()
187 		else if (info->csvn == 2)  in cpum_cf_ctrset_size()
189 		else if (info->csvn >= 3 && info->csvn <= 5)  in cpum_cf_ctrset_size()
191 		else if (info->csvn == 6 || info->csvn == 7)  in cpum_cf_ctrset_size()
195 		if (info->csvn > 3)  in cpum_cf_ctrset_size()
210 		return -ENODEV;  in cpum_cf_init()
212 	/* clear bit 15 of cr0 to unauthorize problem-state to  in cpum_cf_init()
216 	/* register handler for measurement-alert interruptions */  in cpum_cf_init()
220 		pr_err("Registering for CPU-measurement alerts "  in cpum_cf_init()