On Tue, Oct 1, 2019 at 9:21 AM Sean Christopherson <sean.j.christopherson@xxxxxxxxx> wrote: > > Current versions of Intel's SDM incorrectly state that "bits 31:15 of > the VM-Entry exception error-code field" must be zero. In reality, bits > 31:16 must be zero, i.e. error codes are 16-bit values. > > The bogus error code check manifests as an unexpected VM-Entry failure > due to an invalid code field (error number 7) in L1, e.g. when injecting > a #GP with error_code=0x9f00. > > Nadav previously reported the bug[*], both to KVM and Intel, and fixed > the associated kvm-unit-test. > > [*] https://patchwork.kernel.org/patch/11124749/ > > Reported-by: Nadav Amit <namit@xxxxxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx > Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx> Reviewed-by: Jim Mattson <jmattson@xxxxxxxxxx>
