Re: [RFC,05/10] x86/speculation: Add basic IBRS support infrastructure

2018-01-29 Thread David Dunn
f it sees CPUID[1].ECX[31] set. That's not as nice since it makes detection on bare metal and virtualization platforms different, but it better than keying off FMS. David Dunn On 1/29/18, 5:11 PM, "Eduardo Habkost" wrote: On Mon, Jan 29, 2018 at 02:49:51PM -0800, Jim Matts

Re: [RFC,05/10] x86/speculation: Add basic IBRS support infrastructure

2018-01-29 Thread David Dunn
st asks if FMS matches host. My apologies for posting onto the mailing list out of the blue. Someone asked my opinion on this suggestion. I'm definitely interested in figuring out whether Linux can fully mitigate the SkyLake RSB problem in virtual environments, but it's not clear how best to achieve that. Thanks, David Dunn