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

[Borislav Petkov]

On Wed, Jan 31, 2018 at 12:44:41PM -0200, Eduardo Habkost wrote:
> Also, if anybody don't like it, users can already specify, e.g.,
> "Broadwell,-hle,-rtm" or "Skylake,+spec_ctrl".
> 
> QEMU only adds have the -noTSX and -IBRS CPU for convenience of
> management systems that don't know how to check/configure
> individual CPU features.  We're working with libvirt and
> OpenStack folks to make this kind of trick unnecessary.

Yeah, defining separate CPU models just for that seems hacky. The
+/-<feature> specification looks like the Right Thing(tm) to do.

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    Boris.

SUSE Linux GmbH, GF: Felix ImendÃrffer, Jane Smithard, Graham Norton, HRB 21284 (AG NÃrnberg)
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