On Tue, 12 Dec 2023 at 01:43, Tomoyuki Hirose <tomoyuki.hir...@igel.co.jp> wrote: > > Thanks for comment. > > On Mon, Dec 11, 2023 at 10:57 PM Peter Maydell <peter.mayd...@linaro.org> > wrote: > > We should definitely look at fixing the unaligned access > > stuff, but the linked bug report is not trying to do an > > unaligned access -- it wants to do a 2-byte read from offset 2, > > which is aligned. The capability registers in the xHCI spec > > are also all at offsets and sizes that mean that a natural > > read of them is not unaligned. > > Shouldn't I link this bug report? > Or is it not appropriate to allow unaligned access?
The bug report is definitely relevant. But depending on how tricky the unaligned access handling turns out to be to get right, we might be able to fix the bug by permitting aligned-but-not-4-bytes accesses. (I'm a bit surprised that doesn't work already, in fact: we use it in other devices.) thanks -- PMM
