KVM: x86/mmu: Fix TLB flush range when handling disconnected pt

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When recursively clearing out disconnected pts, the range based TLB
flush in handle_removed_tdp_mmu_page uses the wrong starting GFN,
resulting in the flush mostly missing the affected range. Fix this by
using base_gfn for the flush.

In response to feedback from David Matlack on the RFC version of this
patch, also move a few definitions into the for loop in the function to
prevent unintended references to them in the future.

Fixes: a066e61f13 ("KVM: x86/mmu: Factor out handling of removed page tables")
CC: stable@vger.kernel.org
Signed-off-by: Ben Gardon <bgardon@google.com>
Message-Id: <20211115211704.2621644-1-bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Ben Gardon 2021-11-15 13:17:04 -08:00 • committed by Paolo Bonzini

parent 2845e7353b

commit 574c3c55e9

1 changed files with 4 additions and 6 deletions

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arch/x86/kvm/mmu/tdp_mmu.c

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