[PATCH v2] powerpc: warn on emulation of dcbz instruction in kernel mode

[Michael Ellerman]

On Thu, 16 Sep 2021 16:52:09 +0200, Christophe Leroy wrote:
> dcbz instruction shouldn't be used on non-cached memory. Using
> it on non-cached memory can result in alignment exception and
> implies a heavy handling.
> 
> Instead of silentely emulating the instruction and resulting in high
> performance degradation, warn whenever an alignment exception is
> taken in kernel mode due to dcbz, so that the user is made aware that
> dcbz instruction has been used unexpectedly by the kernel.
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc: warn on emulation of dcbz instruction in kernel mode
      https://git.kernel.org/powerpc/c/cbe654c779616807e1e6823c3bdbfe07a10562b8

cheers