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-rw-r--r--arch/s390/include/asm/cpu_mf.h95
1 files changed, 95 insertions, 0 deletions
diff --git a/arch/s390/include/asm/cpu_mf.h b/arch/s390/include/asm/cpu_mf.h
new file mode 100644
index 00000000000..e49db5d5d06
--- /dev/null
+++ b/arch/s390/include/asm/cpu_mf.h
@@ -0,0 +1,95 @@
+/*
+ * CPU-measurement facilities
+ *
+ * Copyright IBM Corp. 2012
+ * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
+ * Jan Glauber <jang@linux.vnet.ibm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License (version 2 only)
+ * as published by the Free Software Foundation.
+ */
+#ifndef _ASM_S390_CPU_MF_H
+#define _ASM_S390_CPU_MF_H
+
+#define CPU_MF_INT_SF_IAE (1 << 31) /* invalid entry address */
+#define CPU_MF_INT_SF_ISE (1 << 30) /* incorrect SDBT entry */
+#define CPU_MF_INT_SF_PRA (1 << 29) /* program request alert */
+#define CPU_MF_INT_SF_SACA (1 << 23) /* sampler auth. change alert */
+#define CPU_MF_INT_SF_LSDA (1 << 22) /* loss of sample data alert */
+#define CPU_MF_INT_CF_CACA (1 << 7) /* counter auth. change alert */
+#define CPU_MF_INT_CF_LCDA (1 << 6) /* loss of counter data alert */
+
+#define CPU_MF_INT_CF_MASK (CPU_MF_INT_CF_CACA|CPU_MF_INT_CF_LCDA)
+#define CPU_MF_INT_SF_MASK (CPU_MF_INT_SF_IAE|CPU_MF_INT_SF_ISE| \
+ CPU_MF_INT_SF_PRA|CPU_MF_INT_SF_SACA| \
+ CPU_MF_INT_SF_LSDA)
+
+/* CPU measurement facility support */
+static inline int cpum_cf_avail(void)
+{
+ return MACHINE_HAS_SPP && test_facility(67);
+}
+
+static inline int cpum_sf_avail(void)
+{
+ return MACHINE_HAS_SPP && test_facility(68);
+}
+
+
+struct cpumf_ctr_info {
+ u16 cfvn;
+ u16 auth_ctl;
+ u16 enable_ctl;
+ u16 act_ctl;
+ u16 max_cpu;
+ u16 csvn;
+ u16 max_cg;
+ u16 reserved1;
+ u32 reserved2[12];
+} __packed;
+
+/* Query counter information */
+static inline int qctri(struct cpumf_ctr_info *info)
+{
+ int rc = -EINVAL;
+
+ asm volatile (
+ "0: .insn s,0xb28e0000,%1\n"
+ "1: lhi %0,0\n"
+ "2:\n"
+ EX_TABLE(1b, 2b)
+ : "+d" (rc), "=Q" (*info));
+ return rc;
+}
+
+/* Load CPU-counter-set controls */
+static inline int lcctl(u64 ctl)
+{
+ int cc;
+
+ asm volatile (
+ " .insn s,0xb2840000,%1\n"
+ " ipm %0\n"
+ " srl %0,28\n"
+ : "=d" (cc) : "m" (ctl) : "cc");
+ return cc;
+}
+
+/* Extract CPU counter */
+static inline int ecctr(u64 ctr, u64 *val)
+{
+ register u64 content asm("4") = 0;
+ int cc;
+
+ asm volatile (
+ " .insn rre,0xb2e40000,%0,%2\n"
+ " ipm %1\n"
+ " srl %1,28\n"
+ : "=d" (content), "=d" (cc) : "d" (ctr) : "cc");
+ if (!cc)
+ *val = content;
+ return cc;
+}
+
+#endif /* _ASM_S390_CPU_MF_H */