cpu_mf.h

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/*
 * 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 <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_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 */