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| author |   Sean Christopherson <seanjc@google.com> | 2022-08-03 22:49:56 +0000 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2022-08-10 15:08:24 -0400 |
| commit | c3e0c8c2e8b17bae30d5978bc2decdd4098f0f99 (patch) | |
| tree | 460b3db1631b5a7a65194c3902d896dcea11d327 /include/linux/raid/git:/git.zx2c4.com/ssh:/git@git.zx2c4.com | |
| parent | KVM: x86: Tag kvm_mmu_x86_module_init() with __init (diff) | |
| download | linux-dev-c3e0c8c2e8b17bae30d5978bc2decdd4098f0f99.tar.xz linux-dev-c3e0c8c2e8b17bae30d5978bc2decdd4098f0f99.zip | |
KVM: x86/mmu: Fully re-evaluate MMIO caching when SPTE masks change
Fully re-evaluate whether or not MMIO caching can be enabled when SPTE
masks change; simply clearing enable_mmio_caching when a configuration
isn't compatible with caching fails to handle the scenario where the
masks are updated, e.g. by VMX for EPT or by SVM to account for the C-bit
location, and toggle compatibility from false=>true.
Snapshot the original module param so that re-evaluating MMIO caching
preserves userspace's desire to allow caching. Use a snapshot approach
so that enable_mmio_caching still reflects KVM's actual behavior.
Fixes: 8b9e74bfbf8c ("KVM: x86/mmu: Use enable_mmio_caching to track if MMIO caching is enabled")
Reported-by: Michael Roth <michael.roth@amd.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: stable@vger.kernel.org
Tested-by: Michael Roth <michael.roth@amd.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Kai Huang <kai.huang@intel.com>
Message-Id: <20220803224957.1285926-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include/linux/raid/git:/git.zx2c4.com/ssh:/git@git.zx2c4.com')
0 files changed, 0 insertions, 0 deletions