Comment 2 for bug 1761372
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| Christian Ehrhardt (paelzer) wrote Re: backport needed for spectre/meltdown mitigation machine type qemu patches (kvm) | #2 |
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0e1f616
(Get the code!)
I'm still evaluating this (quite some time now), but I want to share the interim TL;DR for you to consider.
All those patches are part of a huge rewrite and handling of sprs.
Yes the series has "only" (already a lot) 7 patches, but it seems due to dependencies this easily will get 10 or even 20+.
We need to look out if we can achive that in a much better backport.
I understand that for 2.12 and later this was the right way to do.
But for the fix in 2.11 we will need:
- do not add a 2.12 type
- modify the 2.11 type instead
- stop rewriting almost all of the spr cap handling
- just set the sane defaults (not much more)
Only then this is maintainable without making 2.11 almost 2.12.
I'll take a further look after a call that starts now, but I'll likely need your help to achive the above.