Re: [Xen-devel] booting domU guest as pvh works in xen-4.11.1 but fails in 4.12

["YOUNG, MICHAEL A." <m.a.young@xxxxxxxxxxxx>]

On Fri, 31 May 2019, Andrew Cooper wrote:

>> I did a bisect on this issue, and it identified the first bad commit as
>> fd32dcfe4c9a539f8e5d26ff4c5ca50ee54556b2
>> x86/vmx: Don't leak EFER.NXE into guest context
>
> Aah - this will be a harpertown core.
>
> You need e28c0ee3356f52f589bbae54e89aaed25c1f599d from staging, which
> has been backported to staging-4.12
> (8457c15b981ba04c0709e6f25af3b76beb34cafa) two weeks ago.
>
> This but accidentally resulted in the SYSCALL instruction being disabled
> behind the back of the guest, which broke all userspace system calls.

Thanks, that patch fixes the DomU boot problem I was seeing.

        Michael Young

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