LXR qemu/target/s390x/cpu

   1/*
   2 * CPU features/facilities helper structs and utility functions for s390
   3 *
   4 * Copyright 2016 IBM Corp.
   5 *
   6 * Author(s): Michael Mueller <mimu@linux.vnet.ibm.com>
   7 *            David Hildenbrand <dahi@linux.vnet.ibm.com>
   8 *
   9 * This work is licensed under the terms of the GNU GPL, version 2 or (at
  10 * your option) any later version. See the COPYING file in the top-level
  11 * directory.
  12 */
  13
  14#ifndef TARGET_S390X_CPU_FEATURES_H
  15#define TARGET_S390X_CPU_FEATURES_H
  16
  17#include "qemu/bitmap.h"
  18#include "cpu_features_def.h"
  19
  20/* CPU features are announced via different ways */
  21typedef enum {
  22    S390_FEAT_TYPE_STFL,
  23    S390_FEAT_TYPE_SCLP_CONF_CHAR,
  24    S390_FEAT_TYPE_SCLP_CONF_CHAR_EXT,
  25    S390_FEAT_TYPE_SCLP_CPU,
  26    S390_FEAT_TYPE_MISC,
  27    S390_FEAT_TYPE_PLO,
  28    S390_FEAT_TYPE_PTFF,
  29    S390_FEAT_TYPE_KMAC,
  30    S390_FEAT_TYPE_KMC,
  31    S390_FEAT_TYPE_KM,
  32    S390_FEAT_TYPE_KIMD,
  33    S390_FEAT_TYPE_KLMD,
  34    S390_FEAT_TYPE_PCKMO,
  35    S390_FEAT_TYPE_KMCTR,
  36    S390_FEAT_TYPE_KMF,
  37    S390_FEAT_TYPE_KMO,
  38    S390_FEAT_TYPE_PCC,
  39    S390_FEAT_TYPE_PPNO,
  40    S390_FEAT_TYPE_KMA,
  41} S390FeatType;
  42
  43/* Definition of a CPU feature */
  44typedef struct {
  45    const char *name;       /* name exposed to the user */
  46    const char *desc;       /* description exposed to the user */
  47    S390FeatType type;      /* feature type (way of indication)*/
  48    int bit;                /* bit within the feature type area (fixed) */
  49} S390FeatDef;
  50
  51/* use ordinary bitmap operations to work with features */
  52typedef unsigned long S390FeatBitmap[BITS_TO_LONGS(S390_FEAT_MAX)];
  53
  54/* 64bit based bitmap used to init S390FeatBitmap from generated data */
  55typedef uint64_t S390FeatInit[S390_FEAT_MAX / 64 + 1];
  56
  57const S390FeatDef *s390_feat_def(S390Feat feat);
  58S390Feat s390_feat_by_type_and_bit(S390FeatType type, int bit);
  59void s390_init_feat_bitmap(const S390FeatInit init, S390FeatBitmap bitmap);
  60void s390_fill_feat_block(const S390FeatBitmap features, S390FeatType type,
  61                          uint8_t *data);
  62void s390_add_from_feat_block(S390FeatBitmap features, S390FeatType type,
  63                          uint8_t *data);
  64void s390_feat_bitmap_to_ascii(const S390FeatBitmap features, void *opaque,
  65                               void (*fn)(const char *name, void *opaque));
  66
  67/* static groups that will never change */
  68typedef enum {
  69    S390_FEAT_GROUP_PLO,
  70    S390_FEAT_GROUP_TOD_CLOCK_STEERING,
  71    S390_FEAT_GROUP_GEN13_PTFF_ENH,
  72    S390_FEAT_GROUP_MSA,
  73    S390_FEAT_GROUP_MSA_EXT_1,
  74    S390_FEAT_GROUP_MSA_EXT_2,
  75    S390_FEAT_GROUP_MSA_EXT_3,
  76    S390_FEAT_GROUP_MSA_EXT_4,
  77    S390_FEAT_GROUP_MSA_EXT_5,
  78    S390_FEAT_GROUP_MSA_EXT_6,
  79    S390_FEAT_GROUP_MSA_EXT_7,
  80    S390_FEAT_GROUP_MSA_EXT_8,
  81    S390_FEAT_GROUP_MAX,
  82} S390FeatGroup;
  83
  84/* Definition of a CPU feature group */
  85typedef struct {
  86    const char *name;       /* name exposed to the user */
  87    const char *desc;       /* description exposed to the user */
  88    S390FeatBitmap feat;    /* features contained in the group */
  89    S390FeatInit init;      /* used to init feat from generated data */
  90} S390FeatGroupDef;
  91
  92const S390FeatGroupDef *s390_feat_group_def(S390FeatGroup group);
  93
  94#define BE_BIT_NR(BIT) (BIT ^ (BITS_PER_LONG - 1))
  95
  96static inline void set_be_bit(unsigned int bit_nr, uint8_t *array)
  97{
  98    array[bit_nr / 8] |= 0x80 >> (bit_nr % 8);
  99}
 100static inline bool test_be_bit(unsigned int bit_nr, const uint8_t *array)
 101{
 102    return array[bit_nr / 8] & (0x80 >> (bit_nr % 8));
 103}
 104#endif /* TARGET_S390X_CPU_FEATURES_H */
 105