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| author |   Sean Christopherson <seanjc@google.com> | 2021-02-25 12:47:26 -0800 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2021-02-26 04:43:29 -0500 |
| commit | 44ac5958a6c1fd91ac8810fbb37194e377d78db5 (patch) | |
| tree | 2f8364163fcf233b0db88166b961f7611dfe34bf /include/linux/mfd/git:/ssh:/git@git.zx2c4.com | |
| parent | KVM: x86: hyper-v: Fix Hyper-V context null-ptr-deref (diff) | |
| download | linux-dev-44ac5958a6c1fd91ac8810fbb37194e377d78db5.tar.xz linux-dev-44ac5958a6c1fd91ac8810fbb37194e377d78db5.zip | |
KVM: x86/mmu: Set SPTE_AD_WRPROT_ONLY_MASK if and only if PML is enabled
Check that PML is actually enabled before setting the mask to force a
SPTE to be write-protected. The bits used for the !AD_ENABLED case are
in the upper half of the SPTE. With 64-bit paging and EPT, these bits
are ignored, but with 32-bit PAE paging they are reserved. Setting them
for L2 SPTEs without checking PML breaks NPT on 32-bit KVM.
Fixes: 1f4e5fc83a42 ("KVM: x86: fix nested guest live migration with PML")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210225204749.1512652-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/linux/mfd/git:/ssh:/git@git.zx2c4.com')
0 files changed, 0 insertions, 0 deletions