OK, looks like I cannot reopen the bug, probably because the bug tracker
moved to gitlab.
If you care about this feature, please file a bug over there:
https://gitlab.com/qemu-project/qemu/-/issues
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Looks like support for this was not fully added; my apologies for
closing this bug too early.
Adding full support for strong-on-weak emulation would be simple, at
least when it comes to memory ordering. The slowdown would be huge
though, see Figure 12 in
http://www.cs.columbia.edu/~cota/pubs/cota_
See the discussion linked below that says that strong on weak is not
actually fully supported yet.
Is that discussion correct?
===
In short they explained to me that since the host arm64 is a weaker
memory order than the guest x86 they disabled mttcg because if they
would implement it would slow
This feature is in QEMU v3.1, which was released today.
** Changed in: qemu
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1735049
Title:
Need MTTCG sup
** Changed in: qemu
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1735049
Title:
Need MTTCG support for x86 guests
Status in QEMU:
Fix Committed
Bug
Patches are now on the list to enable MTTCG for i386 and x86_64 guests.
See v2 here:
https://lists.gnu.org/archive/html/qemu-devel/2018-09/msg00237.html
I'm hoping these patches will be in the next QEMU release.
Regarding your last question:
> For instance, has support for strong-on-weak memory
** Changed in: qemu
Status: New => In Progress
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https://bugs.launchpad.net/bugs/1735049
Title:
Need MTTCG support for x86 guests
Status in QEMU:
In Progress
Bug description:
