/*
* CPU-measurement facilities
*
* Copyright IBM Corp. 2012
* Author(s): Hendrik Brueckner <[email protected]>
* Jan Glauber <[email protected]>
*
* 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

#include <linux/errno.h>
#include <asm/facility.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_RI_HALTED (1 << 5) /* run-time instr. halted */
#define CPU_MF_INT_RI_BUF_FULL (1 << 4) /* run-time instr. program
buffer full */

#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)
#define CPU_MF_INT_RI_MASK (CPU_MF_INT_RI_HALTED|CPU_MF_INT_RI_BUF_FULL)

/* CPU measurement facility support */
static inline int cpum_cf_avail(void)
{
return MACHINE_HAS_LPP && test_facility(67);
}

static inline int cpum_sf_avail(void)
{
return MACHINE_HAS_LPP && 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 */