• Paolo Bonzini's avatar
    KVM: vmx, svm: always run with EFER.NXE=1 when shadow paging is active · 9167ab79
    Paolo Bonzini authored
    VMX already does so if the host has SMEP, in order to support the combination of
    CR0.WP=1 and CR4.SMEP=1.  However, it is perfectly safe to always do so, and in
    fact VMX already ends up running with EFER.NXE=1 on old processors that lack the
    "load EFER" controls, because it may help avoiding a slow MSR write.  Removing
    all the conditionals simplifies the code.
    
    SVM does not have similar code, but it should since recent AMD processors do
    support SMEP.  So this patch also makes the code for the two vendors more similar
    while fixing NPT=0, CR0.WP=1 and CR4.SMEP=1 on AMD processors.
    
    Cc: stable@vger.kernel.org
    Cc: Joerg Roedel <jroedel@suse.de>
    Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
    9167ab79
vmx.c 219 KB