Re: [Xen-devel] [PATCH for-4.12] x86/altp2m: fix HVMOP_altp2m_set_domain_state race

[Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>]

On 2/8/19 2:58 PM, Jan Beulich wrote:
> Well, to be honest I expected dependencies like this to be there,
> and hence I didn't expect it would be a straightforward change.
> Just like we do e.g. for the IOMMU enabling, I guess the boolean
> wants to become a tristate then (off -> enabling -> enabled),
> which interested sites then can use to distinguish what they
> want/need to do.
>
> Another relatively obvious solution would be to add a boolean
> parameter to altp2m_vcpu_update_p2m() such that
> altp2m_vcpu_initialise() can guide it properly. But this of course
> depends to a certain degree on how wide spread the problem is.
Fair enough, I'll attempt V2 with the second suggestion (adding a bool 
to altp2m_vcpu_update_p2m()).

Razvan

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