On 12/3/24 04:35, Peter Maydell wrote:
On Tue, 3 Dec 2024 at 10:19, Daniel P. Berrangé <berra...@redhat.com> wrote:
Separatley this from patch, we should also consider whether
it is time to do the same for aarch64/arm7.
If I look at this page:
https://gpages.juszkiewicz.com.pl/arm-socs-table/arm-socs.html
and sort by 'announced' to see msot recent CPUs first, then
almost all of them have "NO" in the "aarch32 support" column.
IOW, on modern aarch64 CPUs, qemu-arm is the only viable way
to run 32-bit usermode binaries AFAICT, and suggests we ought
to be creating a binfmt rule for that on aarch64 hosts.
What happens if you have a host CPU that *does* support 32-bit
natively and you also register the binfmt rule? Does the
host kernel prefer to execute natively or does it invoke
QEMU? I don't think we want to roll out something that
silently downgrades native execution to emulation...
The registered rule applies and the kernel invokes qemu.
r~
