kvm/ppc/e500: eliminate tlb_refs

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Commit 523f0e5421 ("KVM: PPC: E500:
Explicitly mark shadow maps invalid") began using E500_TLB_VALID
for guest TLB1 entries, and skipping invalidations if it's not set.

However, when E500_TLB_VALID was set for such entries, it was on a
fake local ref, and so the invalidations never happen.  gtlb_privs
is documented as being only for guest TLB0, though we already violate
that with E500_TLB_BITMAP.

Now that we have MMU notifiers, and thus don't need to actually
retain a reference to the mapped pages, get rid of tlb_refs, and
use gtlb_privs for E500_TLB_VALID in TLB1.

Since we can have more than one host TLB entry for a given tlbe_ref,
be careful not to clear existing flags that are relevant to other
host TLB entries when preparing a new host TLB entry.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>

...

This commit is contained in:

Scott Wood 2013-03-06 16:02:49 +00:00 • committed by Alexander Graf

parent 36ada4f431

commit 47bf379742

2 changed files with 30 additions and 69 deletions

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24

arch/powerpc/kvm/e500.h

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75

arch/powerpc/kvm/e500_mmu_host.c

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