• Nadav Har'El's avatar
    KVM: nVMX: Allow setting the VMXE bit in CR4 · 5e1746d6
    Nadav Har'El authored
    This patch allows the guest to enable the VMXE bit in CR4, which is a
    prerequisite to running VMXON.
    
    Whether to allow setting the VMXE bit now depends on the architecture (svm
    or vmx), so its checking has moved to kvm_x86_ops->set_cr4(). This function
    now returns an int: If kvm_x86_ops->set_cr4() returns 1, __kvm_set_cr4()
    will also return 1, and this will cause kvm_set_cr4() will throw a #GP.
    
    Turning on the VMXE bit is allowed only when the nested VMX feature is
    enabled, and turning it off is forbidden after a vmxon.
    Signed-off-by: default avatarNadav Har'El <nyh@il.ibm.com>
    Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
    5e1746d6
vmx.c 126 KB