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/* SPDX-License-Identifier: GPL-2.0 */
/*
* CPU-measurement facilities
*
* Copyright IBM Corp. 2012, 2018
* Author(s): Hendrik Brueckner <[email protected]>
* Jan Glauber <[email protected]>
*/
#ifndef _ASM_S390_CPU_MF_H
#define _ASM_S390_CPU_MF_H
#include <linux/errno.h>
#include <asm/facility.h>
asm(".include \"asm/cpu_mf-insn.h\"\n");
#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_MTDA (1 << 15) /* loss of MT ctr. 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_MTDA|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_SF_RIBM_NOTAV 0x1 /* Sampling unavailable */
/* CPU measurement facility support */
static inline int cpum_cf_avail(void)
{
return test_facility(40) && test_facility(67);
}
static inline int cpum_sf_avail(void)
{
return test_facility(40) && 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 SAMPLING INFORMATION block */
struct hws_qsi_info_block { /* Bit(s) */
unsigned int b0_13:14; /* 0-13: zeros */
unsigned int as:1; /* 14: basic-sampling authorization */
unsigned int ad:1; /* 15: diag-sampling authorization */
unsigned int b16_21:6; /* 16-21: zeros */
unsigned int es:1; /* 22: basic-sampling enable control */
unsigned int ed:1; /* 23: diag-sampling enable control */
unsigned int b24_29:6; /* 24-29: zeros */
unsigned int cs:1; /* 30: basic-sampling activation control */
unsigned int cd:1; /* 31: diag-sampling activation control */
unsigned int bsdes:16; /* 4-5: size of basic sampling entry */
unsigned int dsdes:16; /* 6-7: size of diagnostic sampling entry */
unsigned long min_sampl_rate; /* 8-15: minimum sampling interval */
unsigned long max_sampl_rate; /* 16-23: maximum sampling interval*/
unsigned long tear; /* 24-31: TEAR contents */
unsigned long dear; /* 32-39: DEAR contents */
unsigned int rsvrd0:24; /* 40-42: reserved */
unsigned int ribm:8; /* 43: Reserved by IBM */
unsigned int cpu_speed; /* 44-47: CPU speed */
unsigned long long rsvrd1; /* 48-55: reserved */
unsigned long long rsvrd2; /* 56-63: reserved */
} __packed;
/* SET SAMPLING CONTROLS request block */
struct hws_lsctl_request_block {
unsigned int s:1; /* 0: maximum buffer indicator */
unsigned int h:1; /* 1: part. level reserved for VM use*/
unsigned long long b2_53:52;/* 2-53: zeros */
unsigned int es:1; /* 54: basic-sampling enable control */
unsigned int ed:1; /* 55: diag-sampling enable control */
unsigned int b56_61:6; /* 56-61: - zeros */
unsigned int cs:1; /* 62: basic-sampling activation control */
unsigned int cd:1; /* 63: diag-sampling activation control */
unsigned long interval; /* 8-15: sampling interval */
unsigned long tear; /* 16-23: TEAR contents */
unsigned long dear; /* 24-31: DEAR contents */
/* 32-63: */
unsigned long rsvrd1; /* reserved */
unsigned long rsvrd2; /* reserved */
unsigned long rsvrd3; /* reserved */
unsigned long rsvrd4; /* reserved */
} __packed;
struct hws_basic_entry {
unsigned int def:16; /* 0-15 Data Entry Format */
unsigned int R:4; /* 16-19 reserved */
unsigned int U:4; /* 20-23 Number of unique instruct. */
unsigned int z:2; /* zeros */
unsigned int T:1; /* 26 PSW DAT mode */
unsigned int W:1; /* 27 PSW wait state */
unsigned int P:1; /* 28 PSW Problem state */
unsigned int AS:2; /* 29-30 PSW address-space control */
unsigned int I:1; /* 31 entry valid or invalid */
unsigned int CL:2; /* 32-33 Configuration Level */
unsigned int H:1; /* 34 Host Indicator */
unsigned int LS:1; /* 35 Limited Sampling */
unsigned int:12;
unsigned int prim_asn:16; /* primary ASN */
unsigned long long ia; /* Instruction Address */
unsigned long long gpp; /* Guest Program Parameter */
unsigned long long hpp; /* Host Program Parameter */
} __packed;
struct hws_diag_entry {
unsigned int def:16; /* 0-15 Data Entry Format */
unsigned int R:15; /* 16-19 and 20-30 reserved */
unsigned int I:1; /* 31 entry valid or invalid */
u8 data[]; /* Machine-dependent sample data */
} __packed;
struct hws_combined_entry {
struct hws_basic_entry basic; /* Basic-sampling data entry */
struct hws_diag_entry diag; /* Diagnostic-sampling data entry */
} __packed;
union hws_trailer_header {
struct {
unsigned int f:1; /* 0 - Block Full Indicator */
unsigned int a:1; /* 1 - Alert request control */
unsigned int t:1; /* 2 - Timestamp format */
unsigned int :29; /* 3 - 31: Reserved */
unsigned int bsdes:16; /* 32-47: size of basic SDE */
unsigned int dsdes:16; /* 48-63: size of diagnostic SDE */
unsigned long long overflow; /* 64 - Overflow Count */
};
__uint128_t val;
};
struct hws_trailer_entry {
union hws_trailer_header header; /* 0 - 15 Flags + Overflow Count */
unsigned char timestamp[16]; /* 16 - 31 timestamp */
unsigned long long reserved1; /* 32 -Reserved */
unsigned long long reserved2; /* */
union { /* 48 - reserved for programming use */
struct {
unsigned int clock_base:1; /* in progusage2 */
unsigned long long progusage1:63;
unsigned long long progusage2;
};
unsigned long long progusage[2];
};
} __packed;
/* Load program parameter */
static inline void lpp(void *pp)
{
asm volatile(".insn s,0xb2800000,0(%0)\n":: "a" (pp) : "memory");
}
/* 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) : "Q" (ctl) : "cc");
return cc;
}
/* Extract CPU counter */
static inline int __ecctr(u64 ctr, u64 *content)
{
u64 _content;
int cc;
asm volatile (
" .insn rre,0xb2e40000,%0,%2\n"
" ipm %1\n"
" srl %1,28\n"
: "=d" (_content), "=d" (cc) : "d" (ctr) : "cc");
*content = _content;
return cc;
}
/* Extract CPU counter */
static inline int ecctr(u64 ctr, u64 *val)
{
u64 content;
int cc;
cc = __ecctr(ctr, &content);
if (!cc)
*val = content;
return cc;
}
/* Store CPU counter multiple for a particular counter set */
enum stcctm_ctr_set {
EXTENDED = 0,
BASIC = 1,
PROBLEM_STATE = 2,
CRYPTO_ACTIVITY = 3,
MT_DIAG = 5,
MT_DIAG_CLEARING = 9, /* clears loss-of-MT-ctr-data alert */
};
static __always_inline int stcctm(enum stcctm_ctr_set set, u64 range, u64 *dest)
{
int cc;
asm volatile (
" STCCTM %2,%3,%1\n"
" ipm %0\n"
" srl %0,28\n"
: "=d" (cc)
: "Q" (*dest), "d" (range), "i" (set)
: "cc", "memory");
return cc;
}
/* Query sampling information */
static inline int qsi(struct hws_qsi_info_block *info)
{
int cc = 1;
asm volatile(
"0: .insn s,0xb2860000,%1\n"
"1: lhi %0,0\n"
"2:\n"
EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
: "+d" (cc), "+Q" (*info));
return cc ? -EINVAL : 0;
}
/* Load sampling controls */
static inline int lsctl(struct hws_lsctl_request_block *req)
{
int cc;
cc = 1;
asm volatile(
"0: .insn s,0xb2870000,0(%1)\n"
"1: ipm %0\n"
" srl %0,28\n"
"2:\n"
EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
: "+d" (cc), "+a" (req)
: "m" (*req)
: "cc", "memory");
return cc ? -EINVAL : 0;
}
/* Sampling control helper functions */
#include <linux/time.h>
static inline unsigned long freq_to_sample_rate(struct hws_qsi_info_block *qsi,
unsigned long freq)
{
return (USEC_PER_SEC / freq) * qsi->cpu_speed;
}
static inline unsigned long sample_rate_to_freq(struct hws_qsi_info_block *qsi,
unsigned long rate)
{
return USEC_PER_SEC * qsi->cpu_speed / rate;
}
/* Return TOD timestamp contained in an trailer entry */
static inline unsigned long long trailer_timestamp(struct hws_trailer_entry *te)
{
/* TOD in STCKE format */
if (te->header.t)
return *((unsigned long long *) &te->timestamp[1]);
/* TOD in STCK format */
return *((unsigned long long *) &te->timestamp[0]);
}
/* Return pointer to trailer entry of an sample data block */
static inline unsigned long *trailer_entry_ptr(unsigned long v)
{
void *ret;
ret = (void *) v;
ret += PAGE_SIZE;
ret -= sizeof(struct hws_trailer_entry);
return (unsigned long *) ret;
}
/* Return true if the entry in the sample data block table (sdbt)
* is a link to the next sdbt */
static inline int is_link_entry(unsigned long *s)
{
return *s & 0x1ul ? 1 : 0;
}
/* Return pointer to the linked sdbt */
static inline unsigned long *get_next_sdbt(unsigned long *s)
{
return (unsigned long *) (*s & ~0x1ul);
}
#endif /* _ASM_S390_CPU_MF_H */
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