Report when SVE is present and allow it to be used by calling
sve_restore_state on an SVE exception from userspace.
Sponsored by: Arm Ltd
Details
Details
- Reviewers
kib markj manu - Group Reviewers
arm64 - Commits
- rG1f9635e2c213: arm64: Enable SVE in userspace
rG205c1007be6d: arm64: Enable SVE in userspace
Diff Detail
Diff Detail
- Repository
- rG FreeBSD src repository
- Lint
Lint Not Applicable - Unit
Tests Not Applicable
Event Timeline
Comment Actions
Do we need to add something to the AT_HWCAP2 vector as well? Or is that stuff all SVE2 only?
| sys/arm64/arm64/identcpu.c | ||
|---|---|---|
| 1385–1386 | This comment can go away now. | |
| sys/arm64/arm64/trap.c | ||
|---|---|---|
| 643 | Almost all exception handlers do call userret(). If exceptions (pun is not intended) are intended (again not intended), then perhaps some explanation should be added in a form of comment. Also, what about factoring out the userret call somewhere in a common place? | |
Comment Actions
- Remove an old comment
- Call userret in the exception handler
- Only tell userspace about SVE in FreeBSD userspace, Linux userspace support is missing needed syscalls