| commit | cc1f6563a92ced0889775d0587316d725b6e1a68 | [log] [tgz] |
|---|---|---|
| author | Guo Ren <guoren@linux.alibaba.com> | Mon Jan 27 19:57:29 2020 +0800 |
| committer | Guo Ren <guoren@linux.alibaba.com> | Fri Feb 21 15:43:24 2020 +0800 |
| tree | 2338b9a232542393b39987b2a6bb5b16951c8ef0 | |
| parent | d936a7e708dcf22344c4420e8b0e36f5d5f8c073 [diff] |
csky: Optimize abiv2 copy_to_user_page with VM_EXEC Only when vma is for VM_EXEC, we need sync dcache & icache. eg: - gdb ptrace modify user space instruction code area. Add VM_EXEC condition to reduce unnecessary cache flush. The abiv1 cpus' cache are all VIPT, so we still need to deal with dcache aliasing problem. But there is optimized way to use cache color, just like what's done in arch/csky/abiv1/inc/abi/page.h. Signed-off-by: Guo Ren <guoren@linux.alibaba.com>