Re: [PATCH] target/arm: Fixed Privileged Access Never (PAN) for aarch32

[Peter Maydell]

On Thu, 27 Oct 2022 at 10:22, Timofey Kutergin <tkutergin@gmail.com> wrote:
> > V8 always implies V7, so we only need to check V7 here.

> From silicon perspective - yes, but as I see in qemu,
> ARM_FEATURE_V7 and ARM_FEATURE_V8 are independent bits which do not affect 
> each
> other in arm_feature() and set_feature() so they should be tested separately.
> Did I miss something?

In arm_cpu_realizefn() there is code which sets feature flags
that are always implied by other feature flags. There we set
the V7VE flag if V8 is set, and the V7 flag if V7VE is set.
So we can rely on any v8 CPU having the V7 feature flag set.

thanks
-- PMM