Messages in this thread | | | From | Arnd Bergmann <> | Date | Mon, 7 Mar 2022 20:30:07 +0100 | Subject | Re: [PATCH RFC] arm64: improve display about CPU architecture in cpuinfo |
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On Mon, Mar 7, 2022 at 5:48 PM Robin Murphy <robin.murphy@arm.com> wrote:
> And arguably it's not even too late, because 10 years ago this *did* say > "AArch64". I don't remember all the exact details behind commit > 44b82b7700d0 ("arm64: Fix up /proc/cpuinfo") - this just tickled enough > of a memory to go and look up the git history - but I don't think we > changed any of those fields without a real reason. >
The patch description does state that this was done for compatibility with 32-bit architectures, which does make some sense. I suppose for similar reasons, the arch/arm/ version of /proc/cpuinfo is now stuck at 'CPU architecture: 7', even for ARMv8 or higher in aarch32 mode.
The part that I find more annoying is how we leave out the one bit of information that people are generally looking for in /proc/cpuinfo: the name of the processor. Even though we already know the exact processor type in order to handle the CPU errata, this is always "model name\t: ARMv7 Processor rev %d (v7l)" on 32-bit, and "model name\t: ARMv8 Processor rev %d (%s)" on 64-bit, with the revision being the least important bit of information here...
Arnd
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