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Groups > linux.kernel > #1740746
| From | Mark Rutland <mark.rutland@arm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 3/3] arm64: cpuinfo: display product info in /proc/cpuinfo |
| Date | 2017-09-27 15:50 +0200 |
| Message-ID | <uukST-3A0-33@gated-at.bofh.it> (permalink) |
| References | <uu6wx-2em-3@gated-at.bofh.it> <uu6wy-2em-27@gated-at.bofh.it> <uui4F-1h8-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
Hi, On Wed, Sep 27, 2017 at 11:42:07AM +0100, Robin Murphy wrote: > On 26/09/17 23:23, Al Stone wrote: > > + seq_printf(m, ", ARM 8.%d (r%dp%d) CPU", > > + MIDR_VARIANT(midr), > > + MIDR_VARIANT(midr), > > + MIDR_REVISION(midr)); > > What is "ARM 8.1" meant to infer for, say, a typical Cortex-A57? Just to make Robin's point a little clearer, MIDR_EL1.Variant is IMPLEMENTATION DEFINED, and doesn't describe the ARMv8.x architecture revision. For example, on Cortex A57 is contains the major revision number of the CPU, and is 1 for any r1pY Cortex-A57 (e.g. those on Juno R1). For better or worse, the architecture provides us no mechanism to determine the architecture revision. Thanks, Mark.
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[PATCH 0/3] arm64: cpuinfo: make /proc/cpuinfo more human-readable Al Stone <ahs3@redhat.com> - 2017-09-27 00:30 +0200
[PATCH 1/3] arm64: cpuinfo: add MPIDR value to /proc/cpuinfo Al Stone <ahs3@redhat.com> - 2017-09-27 00:30 +0200
Re: [PATCH 1/3] arm64: cpuinfo: add MPIDR value to /proc/cpuinfo Mark Rutland <mark.rutland@arm.com> - 2017-09-27 13:40 +0200
[PATCH 3/3] arm64: cpuinfo: display product info in /proc/cpuinfo Al Stone <ahs3@redhat.com> - 2017-09-27 00:30 +0200
Re: [PATCH 3/3] arm64: cpuinfo: display product info in /proc/cpuinfo Florian Fainelli <f.fainelli@gmail.com> - 2017-09-27 02:50 +0200
Re: [PATCH 3/3] arm64: cpuinfo: display product info in /proc/cpuinfo Robin Murphy <robin.murphy@arm.com> - 2017-09-27 12:50 +0200
Re: [PATCH 3/3] arm64: cpuinfo: display product info in /proc/cpuinfo Mark Rutland <mark.rutland@arm.com> - 2017-09-27 15:50 +0200
Re: [PATCH 3/3] arm64: cpuinfo: display product info in /proc/cpuinfo Mark Rutland <mark.rutland@arm.com> - 2017-09-27 13:40 +0200
[PATCH 2/3] arm64: cpuinfo: add human readable CPU names to /proc/cpuinfo Al Stone <ahs3@redhat.com> - 2017-09-27 00:30 +0200
Re: [PATCH 2/3] arm64: cpuinfo: add human readable CPU names to /proc/cpuinfo Robin Murphy <robin.murphy@arm.com> - 2017-09-27 12:40 +0200
Re: [PATCH 2/3] arm64: cpuinfo: add human readable CPU names to /proc/cpuinfo Mark Rutland <mark.rutland@arm.com> - 2017-09-27 13:30 +0200
Re: [PATCH 0/3] arm64: cpuinfo: make /proc/cpuinfo more human-readable Mark Rutland <mark.rutland@arm.com> - 2017-09-27 12:40 +0200
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