text: /*
   * 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
  
  #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_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_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 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;	    /* 40-43: reserved			 */
  	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:14;
  	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:14;	    /* 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;
  
  struct hws_trailer_entry {
  	union {
  		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 long long:61;	/* 3 - 63: Reserved	      */
  		};
  		unsigned long long flags;	/* 0 - 63: All indicators     */
  	};
  	unsigned long long overflow;	 /* 64 - sample Overflow count	      */
  	unsigned char timestamp[16];	 /* 16 - 31 timestamp		      */
  	unsigned long long reserved1;	 /* 32 -Reserved		      */
  	unsigned long long reserved2;	 /*				      */
  	unsigned long long progusage1;	 /* 48 - reserved for programming use */
  	unsigned long long progusage2;	 /*				      */
  } __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 *content)
  {
  	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");
  	*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 the MT utilization counter set */
  static inline int stcctm5(u64 num, u64 *val)
  {
  	int cc;
  
  	asm volatile (
  		"	.insn	rsy,0xeb0000000017,%2,5,%1\n"
  		"	ipm	%0\n"
  		"	srl	%0,28\n"
  		: "=d" (cc)
  		: "Q" (*val), "d" (num)
  		: "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;
  }
  
  #define SDB_TE_ALERT_REQ_MASK	0x4000000000000000UL
  #define SDB_TE_BUFFER_FULL_MASK 0x8000000000000000UL
  
  /* 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->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 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 */
  