On 9/15/23 09:32, Richard Henderson wrote:
Supercedes: 20230914174436.1597356-1-richard.hender...@linaro.org ("[PATCH 0/6] accel/tcg: Always require can_do_io (#1866)")An alternate fix for #1866 without touching can_do_io, and is perhaps a bit cleaner and clearer. Instead, the current cpu checks whether an address space update is required on each entry to the slow path. This certainly catches all i/o. It easily works for the sequential case of two i/o, the first of which changes the address space and the second of which requires the new address space. I've done a tiny bit of performance testing between the two solutions and it seems to be a wash. So now it's simply a matter of cleanliness.
Ho hum, this doesn't fix the x86_64 ovmf issue also quoted in #1866. r~
