Differential D52357 Diff 161420 sys/arm64/include/cpu_feat.h

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sys/arm64/include/cpu_feat.h

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	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	* SUCH DAMAGE.			* SUCH DAMAGE.
	*/			*/

	#ifndef _MACHINE_CPU_FEAT_H_			#ifndef _MACHINE_CPU_FEAT_H_
	#define _MACHINE_CPU_FEAT_H_			#define _MACHINE_CPU_FEAT_H_

	#include <sys/linker_set.h>			#include <sys/linker_set.h>
				#include <sys/sysctl.h>

	typedef enum {			typedef enum {
	ERRATA_UNKNOWN, /* Unknown erratum */			ERRATA_UNKNOWN, /* Unknown erratum */
	ERRATA_NONE, /* No errata for this feature on this system. */			ERRATA_NONE, /* No errata for this feature on this system. */
	ERRATA_AFFECTED, /* There is errata on this system. */			ERRATA_AFFECTED, /* There is errata on this system. */
	ERRATA_FW_MITIGAION, /* There is errata, and a firmware */			ERRATA_FW_MITIGAION, /* There is errata, and a firmware */
	/* mitigation. The mitigation may need a */			/* mitigation. The mitigation may need a */
	/* kernel component. */			/* kernel component. */
	} cpu_feat_errata;			} cpu_feat_errata;

	#define CPU_FEAT_STAGE_MASK 0x00000001			#define CPU_FEAT_STAGE_MASK 0x00000001
	#define CPU_FEAT_EARLY_BOOT 0x00000000			#define CPU_FEAT_EARLY_BOOT 0x00000000
	#define CPU_FEAT_AFTER_DEV 0x00000001			#define CPU_FEAT_AFTER_DEV 0x00000001

	#define CPU_FEAT_SCOPE_MASK 0x00000010			#define CPU_FEAT_SCOPE_MASK 0x00000010
	#define CPU_FEAT_PER_CPU 0x00000000			#define CPU_FEAT_PER_CPU 0x00000000
	#define CPU_FEAT_SYSTEM 0x00000010			#define CPU_FEAT_SYSTEM 0x00000010

	struct cpu_feat;			struct cpu_feat;

	typedef bool (cpu_feat_check)(const struct cpu_feat *, u_int);			typedef bool (cpu_feat_check)(const struct cpu_feat *, u_int);
	typedef bool (cpu_feat_has_errata)(const struct cpu_feat *, u_int,			typedef bool (cpu_feat_has_errata)(const struct cpu_feat *, u_int,
	u_int *, 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);			u_int *, u_int);

	struct cpu_feat {			struct cpu_feat {
	const char *feat_name;			const char *feat_name;
	cpu_feat_check *feat_check;			cpu_feat_check *feat_check;
	cpu_feat_has_errata *feat_has_errata;			cpu_feat_has_errata *feat_has_errata;
	cpu_feat_enable *feat_enable;			cpu_feat_enable *feat_enable;
	uint32_t feat_flags;			uint32_t feat_flags;
				bool feat_enabled;
	};			};
	SET_DECLARE(cpu_feat_set, struct cpu_feat);			SET_DECLARE(cpu_feat_set, struct cpu_feat);

	#define CPU_FEAT(name, check, has_errata, enable, flags) \			SYSCTL_DECL(_hw_feat);

				#define CPU_FEAT(name, descr, check, has_errata, enable, flags) \
	static struct cpu_feat name = { \			static struct cpu_feat name = { \
				impUnsubmitted Not Done Inline Actions Any reason descr isn't retained somewhere? imp: Any reason descr isn't retained somewhere?
				andrewAuthorUnsubmitted Done Inline Actions I previously had it in `struct cpu_feat`, but didn't have a need for it other than in the sysctl below. andrew: I previously had it in `struct cpu_feat`, but didn't have a need for it other than in the…
	.feat_name = #name, \			.feat_name = #name, \
	.feat_check = check, \			.feat_check = check, \
	.feat_has_errata = has_errata, \			.feat_has_errata = has_errata, \
	.feat_enable = enable, \			.feat_enable = enable, \
	.feat_flags = flags, \			.feat_flags = flags, \
				.feat_enabled = false, \
	}; \			}; \
	DATA_SET(cpu_feat_set, name)			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			* 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.			* Management ABI may know the workaround isn't needed on a given system.
	*/			*/
	typedef cpu_feat_errata (cpu_feat_errata_check_fn)(const struct cpu_feat ,			typedef cpu_feat_errata (cpu_feat_errata_check_fn)(const struct cpu_feat ,
	u_int);			u_int);
	void cpu_feat_register_errata_check(cpu_feat_errata_check_fn);			void cpu_feat_register_errata_check(cpu_feat_errata_check_fn);
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