On 09/08/2021 22:18, Oleksandr wrote:
On 09.08.21 23:45, Julien Grall wrote:
Hi Julien
Hi Oleksandr,
On 09/08/2021 19:24, Oleksandr wrote:
On 09.08.21 18:42, Julien Grall wrote:
1. If IOMMU is enabled for Dom0 -> provide holes found in Host DT as
safe ranges
I would take into the account holes >= 1MB.
May I ask why 1MB?
Nothing special, just thinking to not bother with small regions which
would not be too useful overall, but could bloat resulting reg property.
Anyway, I would be ok with any sizes.
I was more interesting with the reasoning behind your choice rather than
saying we want more.
I agree that we may want to skip smaller region. I am guess that an high
number of small regions will also increase the bookeeping in Linux.
But I would probably suggest to align the safe region to a 2MB
(superpage for 4KB page granularity) just because the backend (or even
Xen) may be able to do some optimization there.
Cheers,
--
Julien Grall
