Re: [Xen-devel] [PATCH v3 1/4] x86/vmx: introduce vmwrite_safe()

2017-02-08 Thread Tian, Kevin
> From: Sergey Dyasli [mailto:sergey.dya...@citrix.com] > Sent: Wednesday, February 08, 2017 6:10 PM > > Any fail during the original __vmwrite() leads to BUG() which can be > easily exploited from a guest in the nested vmx mode. > > The new function returns error code depending on the outcome: >

Re: [Xen-devel] [PATCH v3 1/4] x86/vmx: introduce vmwrite_safe()

2017-02-08 Thread Jan Beulich
>>> On 08.02.17 at 11:09, wrote: > Any fail during the original __vmwrite() leads to BUG() which can be > easily exploited from a guest in the nested vmx mode. > > The new function returns error code depending on the outcome: > > VMsucceed: 0 > VMfailValid: VM Instruction Error