KVM: x86/mmu: Ensure TLBs are flushed for TDP MMU during NX zapping

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Honor the "flush needed" return from kvm_tdp_mmu_zap_gfn_range(), which
does the flush itself if and only if it yields (which it will never do in
this particular scenario), and otherwise expects the caller to do the
flush.  If pages are zapped from the TDP MMU but not the legacy MMU, then
no flush will occur.

Fixes: 29cf0f5007 ("kvm: x86/mmu: NX largepage recovery for TDP MMU")
Cc: stable@vger.kernel.org
Cc: Ben Gardon <bgardon@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210325200119.1359384-3-seanjc@google.com>
Reviewed-by: Ben Gardon <bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

...

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Sean Christopherson 2021-03-25 13:01:18 -07:00 • committed by Paolo Bonzini

parent a835429cda

commit 048f49809c

1 changed files with 7 additions and 4 deletions

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arch/x86/kvm/mmu/mmu.c

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