xref: /openbmc/qemu/target/s390x/cpu_features.h (revision 709395f8)
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 #include "gen-features.h"
20 
21 /* CPU features are announced via different ways */
22 typedef enum {
23     S390_FEAT_TYPE_STFL,
24     S390_FEAT_TYPE_SCLP_CONF_CHAR,
25     S390_FEAT_TYPE_SCLP_CONF_CHAR_EXT,
26     S390_FEAT_TYPE_SCLP_CPU,
27     S390_FEAT_TYPE_MISC,
28     S390_FEAT_TYPE_PLO,
29     S390_FEAT_TYPE_PTFF,
30     S390_FEAT_TYPE_KMAC,
31     S390_FEAT_TYPE_KMC,
32     S390_FEAT_TYPE_KM,
33     S390_FEAT_TYPE_KIMD,
34     S390_FEAT_TYPE_KLMD,
35     S390_FEAT_TYPE_PCKMO,
36     S390_FEAT_TYPE_KMCTR,
37     S390_FEAT_TYPE_KMF,
38     S390_FEAT_TYPE_KMO,
39     S390_FEAT_TYPE_PCC,
40     S390_FEAT_TYPE_PPNO,
41     S390_FEAT_TYPE_KMA,
42 } S390FeatType;
43 
44 /* Definition of a CPU feature */
45 typedef struct {
46     const char *name;       /* name exposed to the user */
47     const char *desc;       /* description exposed to the user */
48     S390FeatType type;      /* feature type (way of indication)*/
49     int bit;                /* bit within the feature type area (fixed) */
50 } S390FeatDef;
51 
52 /* use ordinary bitmap operations to work with features */
53 typedef unsigned long S390FeatBitmap[BITS_TO_LONGS(S390_FEAT_MAX)];
54 
55 /* 64bit based bitmap used to init S390FeatBitmap from generated data */
56 typedef uint64_t S390FeatInit[S390_FEAT_MAX / 64 + 1];
57 
58 const S390FeatDef *s390_feat_def(S390Feat feat);
59 S390Feat s390_feat_by_type_and_bit(S390FeatType type, int bit);
60 void s390_init_feat_bitmap(const S390FeatInit init, S390FeatBitmap bitmap);
61 void s390_fill_feat_block(const S390FeatBitmap features, S390FeatType type,
62                           uint8_t *data);
63 void s390_add_from_feat_block(S390FeatBitmap features, S390FeatType type,
64                           uint8_t *data);
65 void s390_feat_bitmap_to_ascii(const S390FeatBitmap features, void *opaque,
66                                void (*fn)(const char *name, void *opaque));
67 
68 /* Definition of a CPU feature group */
69 typedef struct {
70     const char *name;       /* name exposed to the user */
71     const char *desc;       /* description exposed to the user */
72     S390FeatBitmap feat;    /* features contained in the group */
73     S390FeatInit init;      /* used to init feat from generated data */
74 } S390FeatGroupDef;
75 
76 const S390FeatGroupDef *s390_feat_group_def(S390FeatGroup group);
77 
78 #define BE_BIT_NR(BIT) (BIT ^ (BITS_PER_LONG - 1))
79 
80 static inline void set_be_bit(unsigned int bit_nr, uint8_t *array)
81 {
82     array[bit_nr / 8] |= 0x80 >> (bit_nr % 8);
83 }
84 static inline bool test_be_bit(unsigned int bit_nr, const uint8_t *array)
85 {
86     return array[bit_nr / 8] & (0x80 >> (bit_nr % 8));
87 }
88 #endif /* TARGET_S390X_CPU_FEATURES_H */
89