Re: [Xen-devel] [PATCH] x86/vvmx: Fix the use of RDTSCP when it is intercepted at L0

[Jürgen Groß <jgross@xxxxxxxx>]

On 03.10.19 12:47, Andrew Cooper wrote:
> Linux has started using RDTSCP as of v5.1.  This has highlighted a bug in Xen,
> where virtual vmexit simply gives up.
>
>    (XEN) d1v1 Unhandled nested vmexit: reason 51
>    (XEN) domain_crash called from vvmx.c:2671
>    (XEN) Domain 1 (vcpu#1) crashed on cpu#2:
>
> Handle RDTSCP in the virtual vmexit hander in the same was as RDTSC
> intercepts.
>
> Reported-by: Sarah Newman <srn@xxxxxxxxx>
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> Tested-by: Chris Brannon <cmb@xxxxxxxxx>
Release-acked-by: Juergen Gross <jgross@xxxxxxxx>


Juergen

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