Re: [Xen-devel] [PATCH v2 6/6] x86/viridian: implement the crash MSRs

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Mon, Mar 20, 2017 at 05:08:21PM +0000, Paul Durrant wrote:
> Section 2.4.4 of the Hypervisor Top Level Functional Specification states
> that enabling bit 10 in EDX of CPUID leaf 3 advertises to Windows a set
> of MSRs into which it can write crash information.
> 
> This patch advertises that bit and implements the MSRs such that Xen can
> log the information if a Windows guest crashes.
> 
> Signed-off-by: Paul Durrant <paul.durrant@xxxxxxxxxx>
> ---
> Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
> Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
> Cc: Paul Durrant <paul.durrant@xxxxxxxxxx>
> Cc: Jan Beulich <jbeulich@xxxxxxxx>
> Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> 
> v2:
>  - Make MSRs per-vcpu rather than per-domain
>  - Fix hypervisor stack leak
>  - Replicate BUILD_BOG_ON()
>  - Use gprintk() rather than printk()
> ---
>  docs/man/xl.cfg.pod.5.in           | 10 ++++--
>  tools/libxl/libxl.h                |  6 ++++
>  tools/libxl/libxl_dom.c            |  4 +++
>  tools/libxl/libxl_types.idl        |  1 +

Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>

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