KVM: x86/mmu: Set mmio_value to '0' if reserved #PF can't be generated

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Set the mmio_value to '0' instead of simply clearing the present bit to
squash a benign warning in kvm_mmu_set_mmio_spte_mask() that complains
about the mmio_value overlapping the lower GFN mask on systems with 52
bits of PA space.

Opportunistically clean up the code and comments.

Cc: stable@vger.kernel.org
Fixes: d43e2675e9 ("KVM: x86: only do L1TF workaround on affected processors")
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200527084909.23492-1-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2020-05-27 01:49:09 -07:00 • committed by Paolo Bonzini

parent d43e2675e9

commit 6129ed877d

1 changed files with 9 additions and 18 deletions

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arch/x86/kvm/mmu/mmu.c

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