Messages in this thread | | | Date | Tue, 9 Feb 2016 13:23:00 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH -v2] x86: Add an archinfo dumper module |
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* H. Peter Anvin <hpa@zytor.com> wrote:
> On 02/04/16 07:22, Borislav Petkov wrote: > > Here's v2 with the stuff we talked about, implemented. I've added > > 'control_regs' file too so that you can do: > > > > $ cat /sys/kernel/debug/x86/archinfo/control_regs > > CR4: [-|-|SMEP|OSXSAVE|-|-|-|-|OSXMMEXCPT|OSFXSR|-|PGE|MCE|PAE|PSE|-|-|-|-]: 0x1406f0 > > > > for example. Yeah, only CR4 right now. > > > > Off the top of my head, we would need "msrs" which dumps EFER and a > > bunch of other interesting MSRs along with the names of the set bits. > > Is there a reason why all this parsing has to be done in kernel space?
Ease of use I suspect, no need to locate some separate utility. Also, no need to define an ABI for the information displayed - which keeps things simpler. Since it's a kernel module there's no real bloat argument.
Thanks,
Ingo
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