KVM: nVMX: Use correct root level for nested EPT shadow page tables

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commit 148d735eb5 upstream.

Hardcode the EPT page-walk level for L2 to be 4 levels, as KVM's MMU
currently also hardcodes the page walk level for nested EPT to be 4
levels.  The L2 guest is all but guaranteed to soft hang on its first
instruction when L1 is using EPT, as KVM will construct 4-level page
tables and then tell hardware to use 5-level page tables.

Fixes: 855feb6736 ("KVM: MMU: Add 5 level EPT & Shadow page table support.")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Sean Christopherson 2020-02-07 09:37:41 -08:00 • committed by Greg Kroah-Hartman

parent c7fbef6b94

commit 815238268a

1 changed files with 3 additions and 0 deletions

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arch/x86/kvm/vmx/vmx.c

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