Re: [Xen-devel] [PATCH] xen: fix pv domain on amd in 4.9 stable branch

[Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx>]

On Wed, May 30, 2018 at 11:33:22AM +0200, Juergen Gross wrote:
> On 30/05/18 10:33, Greg KH wrote:
> > On Tue, May 29, 2018 at 03:11:36PM +0200, Juergen Gross wrote:
> >> Commit 944e0fc51a89c9827b98813d65dc083274777c7f ("x86/amd: don't set
> >> X86_BUG_SYSRET_SS_ATTRS when running under Xen") breaks Xen pv-domains
> >> on AMD processors, as a prerequisite patch from upstream wasn't added
> >> to 4.9.
> > 
> > What is the prerequsite patch's git id in Linus's tree?
> 
> Commit 0808e80cb760de2733c0527d2090ed2205a1eef8. It won't apply,
> backporting is rather easy, though.
> 
> I thought this was a patch in the middle of a larger series, but
> obviously I misremembered. It was the first patch of that series.
> 
> I'll send a series in case you don't object:
> 
> - revert of stable-4.9 944e0fc51a89c9827b98813d65dc083274777c7f
> - backport of 0808e80cb760de2733c0527d2090ed2205a1eef8
> - new backport of def9331a12977770cc6132d79f8e6565871e8e38

That would be great, I'll gladly take that, thanks.

greg k-h

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