diff options
Diffstat (limited to 'sys/arm64/include/cpu_feat.h')
| -rw-r--r-- | sys/arm64/include/cpu_feat.h | 52 |
1 files changed, 50 insertions, 2 deletions
diff --git a/sys/arm64/include/cpu_feat.h b/sys/arm64/include/cpu_feat.h index 9fe6a9dd95d9..6a311d4000bb 100644 --- a/sys/arm64/include/cpu_feat.h +++ b/sys/arm64/include/cpu_feat.h @@ -29,6 +29,7 @@ #define _MACHINE_CPU_FEAT_H_ #include <sys/linker_set.h> +#include <sys/sysctl.h> typedef enum { ERRATA_UNKNOWN, /* Unknown erratum */ @@ -39,6 +40,31 @@ typedef enum { /* kernel component. */ } cpu_feat_errata; +typedef enum { + /* + * Don't implement the feature or erratum wrokarount, + * e.g. the feature is not implemented or erratum is + * for another CPU. + */ + FEAT_ALWAYS_DISABLE, + + /* + * Disable by default, but allow the user to enable, + * e.g. For a rare erratum with a workaround, Arm + * Category B (rare) or similar. + */ + FEAT_DEFAULT_DISABLE, + + /* + * Enabled by default, bit allow the user to disable, + * e.g. For a common erratum with a workaround, Arm + * Category A or B or similar. + */ + FEAT_DEFAULT_ENABLE, + + /* We could add FEAT_ALWAYS_ENABLE if a need was found. */ +} cpu_feat_en; + #define CPU_FEAT_STAGE_MASK 0x00000001 #define CPU_FEAT_EARLY_BOOT 0x00000000 #define CPU_FEAT_AFTER_DEV 0x00000001 @@ -47,23 +73,45 @@ typedef enum { #define CPU_FEAT_PER_CPU 0x00000000 #define CPU_FEAT_SYSTEM 0x00000010 +#define CPU_FEAT_USER_ENABLED 0x40000000 +#define CPU_FEAT_USER_DISABLED 0x80000000 + struct cpu_feat; -typedef bool (cpu_feat_check)(const struct cpu_feat *, u_int); +typedef cpu_feat_en (cpu_feat_check)(const struct cpu_feat *, u_int); typedef bool (cpu_feat_has_errata)(const struct cpu_feat *, u_int, u_int **, u_int *); -typedef void (cpu_feat_enable)(const struct cpu_feat *, cpu_feat_errata, +typedef bool (cpu_feat_enable)(const struct cpu_feat *, cpu_feat_errata, u_int *, u_int); +typedef void (cpu_feat_disabled)(const struct cpu_feat *); struct cpu_feat { const char *feat_name; cpu_feat_check *feat_check; cpu_feat_has_errata *feat_has_errata; cpu_feat_enable *feat_enable; + cpu_feat_disabled *feat_disabled; uint32_t feat_flags; + bool feat_enabled; }; SET_DECLARE(cpu_feat_set, struct cpu_feat); +SYSCTL_DECL(_hw_feat); + +#define CPU_FEAT(name, descr, check, has_errata, enable, disabled, flags) \ +static struct cpu_feat name = { \ + .feat_name = #name, \ + .feat_check = check, \ + .feat_has_errata = has_errata, \ + .feat_enable = enable, \ + .feat_disabled = disabled, \ + .feat_flags = flags, \ + .feat_enabled = false, \ +}; \ +DATA_SET(cpu_feat_set, name); \ +SYSCTL_BOOL(_hw_feat, OID_AUTO, name, CTLFLAG_RD, &name.feat_enabled, \ + 0, descr) + /* * Allow drivers to mark an erratum as worked around, e.g. the Errata * Management ABI may know the workaround isn't needed on a given system. |