arm64: Add a sysctl to read the current exception level
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Authored by markj on Feb 12 2025, 3:32 PM.

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Reviewers

andrew
manu

Summary

This is useful for determining whether VHE is enabled.

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Repository

rG FreeBSD src repository

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Buildable 62395
Build 59279: arc lint + arc unit

Event Timeline

markj created this revision.Feb 12 2025, 3:32 PM

Herald added a reviewer: manu. · View Herald TranscriptFeb 12 2025, 3:32 PM

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markj requested review of this revision.Feb 12 2025, 3:32 PM

Harbormaster completed remote builds in B62395: Diff 150908.Feb 12 2025, 3:32 PM

markj added a child revision: D48965: arm64/vmm: Don't set MDSCR_KDE in the guest when single stepping.Feb 12 2025, 3:32 PM

What in userspace needs to know about it?

In D48964#1117173, @andrew wrote:

What in userspace needs to know about it?

Nothing in particular, I just wanted a way to tell whether VHE is in use. Is there another way to determine that?

In D48964#1117399, @markj wrote:

In D48964#1117173, @andrew wrote:

What in userspace needs to know about it?

Nothing in particular, I just wanted a way to tell whether VHE is in use. Is there another way to determine that?

No, but most things shouldn't care

This revision is now accepted and ready to land.Feb 18 2025, 5:16 PM

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sys/

arm64/

machdep.c

16 lines

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sys/arm64/arm64/machdep.c

	Show First 20 Lines • Show All 57 Lines • ▼ Show 20 Lines
	#ifdef _KERNEL			#ifdef _KERNEL
	typedef struct {			typedef struct {
	struct iso_node *inop;			struct iso_node *inop;
	int fields; /* interesting fields in this analysis */			int fields; /* interesting fields in this analysis */
	daddr_t iso_ce_blk; /* block of continuation area */			daddr_t iso_ce_blk; /* block of continuation area */
	off_t iso_ce_off; /* offset of continuation area */			off_t iso_ce_off; /* offset of continuation area */
	int iso_ce_len; /* length of continuation area */			int iso_ce_len; /* length of continuation area */
	struct iso_mnt imp; / mount structure */			struct iso_mnt imp; / mount structure */
	cd_ino_t inump; / inode number pointer */			ino_t inump; / inode number pointer */
	char outbuf; / name/symbolic link output area */			char outbuf; / name/symbolic link output area */
	u_short outlen; / length of above */			u_short outlen; / length of above */
	u_short maxlen; /* maximum length of above */			u_short maxlen; /* maximum length of above */
	int cont; /* continuation of above */			int cont; /* continuation of above */
	} ISO_RRIP_ANALYZE;			} ISO_RRIP_ANALYZE;

	struct iso_directory_record;			struct iso_directory_record;

	int cd9660_rrip_analyze(struct iso_directory_record *isodir,			int cd9660_rrip_analyze(struct iso_directory_record *isodir,
	struct iso_node inop, struct iso_mnt imp);			struct iso_node inop, struct iso_mnt imp);
	int cd9660_rrip_getname(struct iso_directory_record *isodir,			int cd9660_rrip_getname(struct iso_directory_record *isodir,
	char outbuf, u_short outlen,			char outbuf, u_short outlen,
	cd_ino_t inump, struct iso_mnt imp);			ino_t inump, struct iso_mnt imp);
	int cd9660_rrip_getsymname(struct iso_directory_record *isodir,			int cd9660_rrip_getsymname(struct iso_directory_record *isodir,
	char outbuf, u_short outlen,			char outbuf, u_short outlen,
	struct iso_mnt *imp);			struct iso_mnt *imp);
	int cd9660_rrip_offset(struct iso_directory_record *isodir,			int cd9660_rrip_offset(struct iso_directory_record *isodir,
	struct iso_mnt *imp);			struct iso_mnt *imp);
	#endif /* _KERNEL */			#endif /* _KERNEL */

	#endif /* _ISOFS_CD9660_ISO_RRIP_H_ */			#endif /* _ISOFS_CD9660_ISO_RRIP_H_ */

arm64: Add a sysctl to read the current exception levelAcceptedPublicActions