[PATCH kernel] powerpc/kuap: Restore AMR after replaying soft interrupts

Michael Ellerman patch-notifications at ellerman.id.au
Fri Feb 12 11:19:51 AEDT 2021


On Tue, 2 Feb 2021 20:15:41 +1100, Alexey Kardashevskiy wrote:
> Since de78a9c "powerpc: Add a framework for Kernel Userspace Access
> Protection", user access helpers call user_{read|write}_access_{begin|end}
> when user space access is allowed.
> 
> 890274c "powerpc/64s: Implement KUAP for Radix MMU" made the mentioned
> helpers program a AMR special register to allow such access for a short
> period of time, most of the time AMR is expected to block user memory
> access by the kernel.
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc/kuap: Restore AMR after replaying soft interrupts
      https://git.kernel.org/powerpc/c/60a707d0c99aff4eadb7fd334c5fd21df386723e

cheers


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