[PATCH 03/12] KVM: arm64: Block unsafe FF-A calls from the host

[Oliver Upton]

On Wed, Nov 16, 2022 at 05:03:26PM +0000, Quentin Perret wrote:
> From: Will Deacon <will at kernel.org>
> 
> When KVM is initialised in protected mode, we must take care to filter
> certain FFA calls from the host kernel so that the integrity of guest
> and hypervisor memory is maintained and is not made available to the
> secure world.
> 
> As a first step, intercept and block all memory-related FF-A SMC calls
> from the host to EL3. This puts the framework in place for handling them
> properly.

Shouldn't FFA_FEATURES interception actually precede this patch? At this
point in the series we're outright lying about the supported features to
the host.

--
Thanks,
Oliver