diff options
| author | Mathis Salmen | 2023-04-06 12:11:31 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-04-20 12:35:12 +0200 |
| commit | 5d12b36d72bbefe7558f19294b647d0605a80de1 (patch) | |
| tree | e36ca392e041bae0f3f1e100918ffbb3e7dfe874 /drivers | |
| parent | a2f6ded41bec1d3be643c80a5eb97f1680309001 (diff) | |
riscv: add icache flush for nommu sigreturn trampoline
commit 8d736482749f6d350892ef83a7a11d43cd49981e upstream.
In a NOMMU kernel, sigreturn trampolines are generated on the user
stack by setup_rt_frame. Currently, these trampolines are not instruction
fenced, thus their visibility to ifetch is not guaranteed.
This patch adds a flush_icache_range in setup_rt_frame to fix this
problem.
Signed-off-by: Mathis Salmen <mathis.salmen@matsal.de>
Fixes: 6bd33e1ece52 ("riscv: add nommu support")
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230406101130.82304-1-mathis.salmen@matsal.de
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions