KVM: arm64: nv: Tag shadow S2 entries with guest's leaf S2 level

Browse source

Populate bits [56:55] of the leaf entry with the level provided
by the guest's S2 translation. This will allow us to better scope
the invalidation by remembering the mapping size.

Of course, this assume that the guest will issue an invalidation
with an address that falls into the same leaf. If the guest doesn't,
we'll over-invalidate.

Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20240614144552.2773592-13-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>

...

This commit is contained in:

Marc Zyngier 2024-06-14 15:45:48 +01:00 • committed by Oliver Upton

parent d1de1576dc

commit b1a3a94812

2 changed files with 25 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

8

arch/arm64/include/asm/kvm_nested.h

View file

19

arch/arm64/kvm/mmu.c

View file