Re: [Xen-devel] [PATCH v3 1/2] xen/x86: ensure copying runstate/time to L1 rather than L2

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 27.02.17 at 04:26, <haozhong.zhang@xxxxxxxxx> wrote:
> For a HVM domain, if a vcpu is in the nested guest mode,
> __raw_copy_to_guest(), __copy_to_guest() and __copy_field_to_guest()
> used by update_runstate_area() and update_secondary_system_time() will
> copy data to L2 guest rather than the L1 guest.
> 
> This commit temporally clears the nested guest flag before all guest
> copies in update_runstate_area() and update_secondary_system_time(),
> and restores the flag after those guest copy operations.
> 
> The flag clear/restore is combined with the existing
> smap_policy_change() which is renamed to update_guest_memory_policy().
> 
> Signed-off-by: Haozhong Zhang <haozhong.zhang@xxxxxxxxx>

Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
https://lists.xen.org/xen-devel