arm64: Add CONFIG_KUSER_HELPERS
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- v3 Latest3 patches 3 repliesIn review
Changes in v3 from the cover letter
- rebase (minor conflicts)
Patches in v3 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/3 | arm64: compat: Split the sigreturn trampolines and kuser helpers (C sources)arch/ arch/ arch/ +1 more | +60 | 0 replies | |
| 2/3 | arm64: compat: Split the sigreturn trampolines and kuser helpers (assembler sources)arch/ arch/ arch/ | +73 | 0 replies | |
| 3/3 | arm64: compat: Add CONFIG_KUSER_HELPERSarch/ arch/ arch/ | +41 | 0 replies |
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Cover letter [PATCH v3 0/3] arm64: Add CONFIG_KUSER_HELPERS
Make it possible to disable the kuser helpers by adding a KUSER_HELPERS config option (enabled by default). When disabled, all kuser helpers-related code is removed from the kernel and no mapping is done at the fixed high address (0xffff0000); any attempt to use a kuser helper from a 32-bit process will result in a segfault.
v2:
- vectors_page and compat_vdso_spec as array of 2
- free sigpage if vectors allocation failed
- adjust makefile so one line for each of the assembler source modules
- split off assembler changes to a new previous patch in series to reduce churn
- modify slightly the feature documentation to reduce its reach
- modify slightly the feature documentation to rationalize the yes default.
- There are more ifdefs as a result of the rebase.
v3:
- rebase (minor conflicts)