Re: [PATCH v19] arm64: mm: Handle Granule Protection Faults (GPFs)

[Catalin Marinas]

On Wed, 30 Sep 2026 17:49:30 +0100, Suzuki K Poulose wrote:
> If the host attempts to access granules that have been delegated to RMM
> (for use as an RMM object or Realm Data), these accesses will be caught
> and will trigger a Granule Protection Fault (GPF).
> 
> A fault during a page walk signals a bug in the kernel and is handled by
> oopsing the kernel. A non-page walk fault could be caused by:
> 
> [...]

Applied to arm64 (for-next/fw-rmi), thanks!

[1/1] arm64: mm: Handle Granule Protection Faults (GPFs)
      https://git.kernel.org/arm64/c/27fececa00df

This is needed since as soon as we add RMM activation, the kernel is
exposed to GPFs via at least load_unaligned_zeropad(), even in the
absence of guest_memfd.