Re: [PATCH v2 7/7] xen: tolerate ACPI NVS memory overlapping with Xen allocated memory

[Jan Beulich]

On 20.08.2024 10:20, Juergen Gross wrote:
> In order to minimize required special handling for running as Xen PV
> dom0, the memory layout is modified to match that of the host. This
> requires to have only RAM at the locations where Xen allocated memory
> is living. Unfortunately there seem to be some machines, where ACPI
> NVS is located at 64 MB, resulting in a conflict with the loaded
> kernel or the initial page tables built by Xen.
> 
> As ACPI NVS needs to be accessed by the kernel only for saving and
> restoring it across suspend operations, it can be relocated in the
> dom0's memory map by swapping it with unused RAM (this is possible
> via modification of the dom0 P2M map).

Shouldn't this paragraph be amended / re-written, as this was what made
me ask for what is now patch 6?

Jan