BMC/Intel-BMC/linux.git/arch/csky/abiv2/cacheflush.c, branch dev-5.2Intel OpenBMC Linux kernel source tree (mirror)https://git.radix-linux.su/BMC/Intel-BMC/linux.git/atom?h=dev-5.22019-04-22T05:44:57+00:00csky: Fixup wrong update_mmu_cache implementation2019-04-22T05:44:57+00:00Guo Renren_guo@c-sky.com2019-04-10T02:55:07+00:00urn:sha1:981bbf274b64496fd4376b44120d47dae4ca94e8
In our stress test, we found some crash problem caused by:
if (!(vma->vm_flags & VM_EXEC))
return;
in update_mmu_cache().
Seems current update_mmu_cache implementation is wrong and we retread
to the conservative implementation.
Also the usage of kmap_atomic in update_mmu_cache is risky, page-virtual
may be scheduled out and changed, so we must use preempt_disable &
pagefault_disable which is called by kmap_atomic().
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Cc: Arnd Bergmann <arnd@arndb.de>
csky: Cache and TLB routines2018-10-25T15:36:19+00:00Guo Renren_guo@c-sky.com2018-09-05T06:25:10+00:00urn:sha1:00a9730e1007c6cc87a7c78af2f24a4105d616ee
This patch adds cache and tlb sync codes for abiv1 & abiv2.
Signed-off-by: Guo Ren <ren_guo@c-sky.com>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>