Re: [PATCH] perf/x86: check ucode before disabling PEBS on SandyBridge

[H. Peter Anvin]

On 06/12/2012 12:49 PM, Borislav Petkov wrote:
> 
> Also, I'd assume we need some of the current functionality to be able to
> load ucode without rebooting the box.
> 

Yes, the basic idea is that we'll keep the ucode around anyway so we can
feed it to hotplug CPUs or S3 resume.  If the ucode is updated from
userspace we'd replace the in-memory copy and load it into the CPUs.

	-hpa


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