Messages in this thread | | | Subject | Re: Avoid speculative indirect calls in kernel | Date | Thu, 4 Jan 2018 15:55:53 +0000 | From | "Woodhouse, David" <> |
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On Thu, 2018-01-04 at 07:53 -0800, Andi Kleen wrote: > > I remove that because what you're testing for doesn't exist in the > tree yet. > > Yes it can be added later. > > Right now we just want a basic static version to work reliably.
But it doesn't. You can't protect VMs from each other, or userspace processes from each other, without IBPB. And you really ought to be setting IBRS before calling any runtime firmware APIs too.
So we really do need to add the microcode support on top right away, even if we refactor the series to put retpoline first.[unhandled content-type:application/x-pkcs7-signature] | |