On Thu, Jan 23, 2025 at 11:31:19AM +0100, Jan Beulich wrote:
> The MMIO cache is intended to have one entry used per independent memory
> access that an insn does. This, in particular, is supposed to be
> ignoring any page boundary crossing. Therefore when looking up a cache
> entry, the access'es starting (linear) address is relevant, not the one
> possibly advanced past a page boundary.
>
> In order for the same offset-into-buffer variable to be usable in
> hvmemul_phys_mmio_access() for both the caller's buffer and the cache
> entry's it is further necessary to have the un-adjusted caller buffer
> passed into there.
>
> Fixes: 2d527ba310dc ("x86/hvm: split all linear reads and writes at page
> boundary")
> Reported-by: Manuel Andreas <manuel.andr...@tum.de>
> Signed-off-by: Jan Beulich <jbeul...@suse.com>
Acked-by: Roger Pau Monné <roger....@citrix.com>
Thanks, Roger.
