On Fri, 7 Oct 2022 at 17:45, Richard Henderson
<richard.henderson@linaro.org> wrote:
On 10/7/22 06:47, Peter Maydell wrote:
Are there definitely no code paths where we might try to do
a page table walk with the iothread already locked ?
I'll double-check, but another possibility is to simply perform the atomic
operation on
the low 32-bits, where both AF and DB are located. Another trick I learned
from x86...
Doesn't that cause a problem where we don't detect that some other
CPU wrote to the high 32 bits of the descriptor ? We're supposed to
be using those high 32 bits, not the ones we have in hand...