commit d2f7ad12852f5e7b2f7debf5e5b5b931a93f29b1
author Pierre-Clément Tosi <ptosi@google.com> Thu Jun 29 11:48:29 2023 +0000
committer Pierre-Clément Tosi <ptosi@google.com> Thu Jul 06 16:03:46 2023 +0000
tree eaa34c9b1d385d44f3142a9d5852cc8b380cf09a
parent 887364660bf96ffa08ab51b991399c105b9a25ae

vmbase: Only share if hyp has DYNAMIC_MEM_SHARE

For correctness, always check that DYNAMIC_MEM_SHARE is supported by the
hypervisor before calling its backend functions to share/unshare memory
in MemorySharer.

Note that Gunyah (only hyp without DYNAMIC_MEM_SHARE) already defines
those functions as unimplemented!(), meaning that the logic surrounding
the newly-introduced checks can be assumed to already prevent those
functions from being called so that this patch should not result in any
noticeable change.

This also adds support for using MemorySharer (and therefore the VirtIO
devices) on platforms that don't support DYNAMIC_MEM_SHARE but also
don't provide a static swiotlb e.g. non-protected KVM.

Test: atest DebugPolicyHostTests#testNoAdbInDebugPolicy_withDebugLevelNone_boots
Test: atest rialto_test vmbase_example.integration_test
Change-Id: I327000188faa3b8dd74c7029999729ef7516ef66