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| author | Rick Edgecombe <rick.p.edgecombe@intel.com> | 2023-06-12 17:10:52 -0700 |
|---|---|---|
| committer | Dave Hansen <dave.hansen@linux.intel.com> | 2023-08-02 15:01:50 -0700 |
| commit | 98cfa4630912a80a575277d1bf193376ba66116a (patch) | |
| tree | 1d861154e8be4b5e1c6adb37bafd95f30ddabbc1 /arch/arm/kernel | |
| parent | 6ee836687a3f39f92da790d33fa9694fe0143410 (diff) | |
x86: Introduce userspace API for shadow stack
Add three new arch_prctl() handles:
- ARCH_SHSTK_ENABLE/DISABLE enables or disables the specified
feature. Returns 0 on success or a negative value on error.
- ARCH_SHSTK_LOCK prevents future disabling or enabling of the
specified feature. Returns 0 on success or a negative value
on error.
The features are handled per-thread and inherited over fork(2)/clone(2),
but reset on exec().
Co-developed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Mike Rapoport (IBM) <rppt@kernel.org>
Tested-by: Pengfei Xu <pengfei.xu@intel.com>
Tested-by: John Allen <john.allen@amd.com>
Tested-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/all/20230613001108.3040476-27-rick.p.edgecombe%40intel.com
Diffstat (limited to 'arch/arm/kernel')
0 files changed, 0 insertions, 0 deletions