diff options
| author | Deepak Gupta <debug@rivosinc.com> | 2026-01-25 21:09:54 -0700 |
|---|---|---|
| committer | Paul Walmsley <pjw@kernel.org> | 2026-01-29 02:34:39 -0700 |
| commit | 61a0200211d31e20380c35d619960a40113da872 (patch) | |
| tree | 59605624083b30b49a5dcf535d91b3dbc82d8f5e /include/linux | |
| parent | fd44a4a8551698757d0e7eeaa964735b471f7407 (diff) | |
riscv: Implement arch-agnostic shadow stack prctls
Implement an architecture-agnostic prctl() interface for setting and
getting shadow stack status. The prctls implemented are
PR_GET_SHADOW_STACK_STATUS, PR_SET_SHADOW_STACK_STATUS and
PR_LOCK_SHADOW_STACK_STATUS.
As part of PR_SET_SHADOW_STACK_STATUS/PR_GET_SHADOW_STACK_STATUS, only
PR_SHADOW_STACK_ENABLE is implemented because RISCV allows each mode to
write to their own shadow stack using 'sspush' or 'ssamoswap'.
PR_LOCK_SHADOW_STACK_STATUS locks the current shadow stack enablement
configuration.
Reviewed-by: Zong Li <zong.li@sifive.com>
Signed-off-by: Deepak Gupta <debug@rivosinc.com>
Tested-by: Andreas Korb <andreas.korb@aisec.fraunhofer.de> # QEMU, custom CVA6
Tested-by: Valentin Haudiquet <valentin.haudiquet@canonical.com>
Link: https://patch.msgid.link/20251112-v5_user_cfi_series-v23-12-b55691eacf4f@rivosinc.com
[pjw@kernel.org: cleaned up patch description]
Signed-off-by: Paul Walmsley <pjw@kernel.org>
Diffstat (limited to 'include/linux')
0 files changed, 0 insertions, 0 deletions