| Message ID | 20180305200441.5089-2-sean.j.christopherson@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 591214843046..b794b0f44cd3 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -6017,6 +6017,9 @@ static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr) { int ret; + if (enable_unrestricted_guest) + return 0; + ret = x86_set_memory_region(kvm, TSS_PRIVATE_MEMSLOT, addr, PAGE_SIZE * 3); if (ret)
An unrestricted guest can run with CR0.PG==0 and/or CR0.PE==0, e.g. it can run in Real Mode without requiring host emulation. The RM TSS is only used for emulating RM, i.e. it will never be used when unrestricted guest is enabled and so doesn't need to be configured. Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> --- arch/x86/kvm/vmx.c | 3 +++ 1 file changed, 3 insertions(+)