tree cb4ce6d604e999c1b538fd9f2f031a01831f4ea7
parent 5d7ff5bbde21858b43af38e7cb5cae59bd4668ad
author Jan Kiszka <jan.kiszka@web.de> 1260111084 +0100
committer Anthony Liguori <aliguori@us.ibm.com> 1260197147 -0600

kvm: x86: Fix initial kvm_has_msr_star

KVM_GET_MSR_INDEX_LIST returns -E2BIG when the provided space is too
small for all MSRs. But this is precisely the error we trigger with the
initial request in order to obtain that size. Do not fail in that case.

This caused a subtle corruption of the guest state as MSR_STAR was not
properly saved/restored. The corruption became visible with latest kvm
optimizing the MSR updates.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>