Messages in this thread | | | Subject | Re: [PATCH] x86/microcode: allow non-root reading of microcode version and processor flags | From | Jacek Tomaka <> | Date | Sun, 26 Aug 2018 20:23:48 +0800 |
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> On 26 Aug 2018, at 7:52 pm, Boris Petkov <bp@alien8.de> wrote: > >> On August 25, 2018 6:50:39 AM GMT+03:00, Jacek Tomaka <jacekt@dugeo.com> wrote: >> /sys/devices/system/cpu/cpuX/microcode >> >> Before: >> -r-------- processor_flags >> -r-------- version >> >> After: >> -r--r--r-- processor_flags >> -r--r--r-- version >> >> Microcode version has been already readable for non root users via >> /proc/cpuinfo. However it is easier to access it from >> /sys/devices/system/cpu/cpuX/microcode/version > > Easier than /proc/cpuinfo?! Sorry, not really.
Why not?
> You'd need to elaborate in greater detail what exactly you're trying to achieve.
I am trying to get microcode version from user space. Reading it from /proc/cpuinfo requires greping/awking to extract the bits of information that are readily available in microcode/version.
Any reason why the same piece of information has different access permissions, depending on the way it is accessed?
Regards. Jacek Tomaka
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