Am Sonntag, 29. Dezember 2019 11:48:45 UTC+1 schrieb Jan Kiszka:
>
> Are you using jailhouse-images master, ie. -cpu host,...? Or was this 
> -cpu kvm64?
>

pure master, ie, "-cpu host..." 

This may still be a limitation of the host CPU.


quite convinced about that :) , after trying to solve/understand the mess 
about x2APIC on these processors for the last days (sidenote, I have to 
start my host system (see above) with kernel parameter nox2apic, because 
the up-to-date BIOS still forbids it. x2APIC is emulated by qemu)

Could you try "jailhouse hardware check" with this patch on the host?
>

sure,
reflects exactly what I found by fiddling in vmx.c:
with default start-qemu.sh -> "XSAVES  MISSING" ... "Check FAILED!"
with "-xsaves" added to qemu's -cpu param -> "XSAVES   missing (optional)" 
... "Check passed!" (and it seems usable)

[image: jh_hw_chk_wPatch-xsaves.png] 

[image: jh_hw_chk_wPatch.png] <about:invalid#zClosurez>

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