On Wed, Oct 20, 2021 at 2:12 PM Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote:
>
> On 20/10/21 22:46, Jim Mattson wrote:
> >> - vmcs_write(GUEST_LIMIT_TR, tss_descr.limit);
> >> + vmcs_write(GUEST_LIMIT_TR, 0x67);
> > Isn't the limit still set to 0xFFFF in {cstart,cstart64}.S? And
> > doesn't the VMware backdoor test assume there's room for an I/O
> > permission bitmap?
> >
>
> Yes, but this is just for L2. The host TR limit is restored to 0x67 on
> every vmexit, and it seemed weird to run L1 and L2 with different limits.
Perhaps you could change the limits in the GDT entries to match?
