tree 98f4ff2cb107dd466d88494d50e8d8273dccbcce
parent f0586a99aab310114237bbdbfb78f03ddb717ba7
author Mostafa Saleh <smostafa@google.com> 1721725597 +0000
committer Mostafa Saleh <smostafa@google.com> 1721822239 +0000

ANDROID: KVM: arm64: iommu: Use force_free for free_domain

Previously, free_domain would call the io-pgtable-arm free_domain
which destroys the page table. However, the it can have valid
entries, for the host that would mean that this memory won't
be allowed to be donated anywhere, however allowing that
from guest would mean that the guest can break the host,
by mapping pages in the domain and freeing the domain without
doing an unmap first.
So, just force_free domain to clean the pages mapped in the
domain after destroying it.

Alternatively, we can keep track of mapped pages and reject
to free domains that are busy.

Change-Id: I1d02c1de030e0ab43d8b3342f46460004f4f07e6
Signed-off-by: Mostafa Saleh <smostafa@google.com>