On Mon, Jun 29, 2015 at 03:18:51PM -0400, Bandan Das wrote: > > Commit f104765b4f81fd74d69e0eb161e89096deade2db upstream. > > This causes the L1 guest to crash when running a nested guest > with an AMD processor that doesn't support NRIPS. > > If hardware doesn't support DecodeAssist - a feature that provides > more information about the intercept in the VMCB, KVM decodes the > instruction and then updates the next_rip vmcb control field. > However, NRIP support itself depends on cpuid Fn8000_000A_EDX[NRIPS]. > Since skip_emulated_instruction() doesn't verify nrip support > before accepting control.next_rip as valid, avoid writing this > field if support isn't present. > > Signed-off-by: Bandan Das <[email protected]> > Signed-off-by: Paolo Bonzini <[email protected]> > --- > arch/x86/kvm/svm.c | 8 ++++++-- > 1 file changed, 6 insertions(+), 2 deletions(-)
What stable kernel trees do you want this applied to? thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
