Re: [PATCH v3 10/12] xen/arm: remove shm holes from extended regions

[Michal Orzel]

On 18/04/2024 09:36, Luca Fancellu wrote:
> 
> 
> From: Penny Zheng <penny.zh...@arm.com>
> 
> Static shared memory acts as reserved memory in guest, so it shall be
> excluded from extended regions.
> 
> Extended regions are taken care of under three different scenarios:
> normal DomU, direct-map domain with iommu on, and direct-map domain
> with iommu off.
> 
> For normal DomU, we create a new function "remove_shm_holes_for_domU",
> to firstly transfer original outputs into the format of
> "struct rangeset", then use "remove_shm_from_rangeset" to remove static
> shm from them.
> 
> For direct-map domain with iommu on, after we get guest shm info from "kinfo",
> we use "remove_shm_from_rangeset" to remove static shm.
> 
> For direct-map domain with iommu off, as static shm has already been taken
> care of through find_unallocated_memory, we do nothing.
> 
> Signed-off-by: Penny Zheng <penny.zh...@arm.com>
> Signed-off-by: Luca Fancellu <luca.fance...@arm.com>
Reviewed-by: Michal Orzel <michal.or...@amd.com>

~Michal