RFR: 8262491: AArch64: CPU description should contain compatible board list [v2]

[Yasumasa Suenaga]

On Wed, 3 Mar 2021 03:03:21 GMT, Nick Gasson <ngasson at openjdk.org> wrote:

> > What file should we refer to detect SoC on server-class machine? Can we detect SoC in same way? (e.g. sysfs)
> > If we cannot implement it in same way, I want to fix it for device tree at first.
> 
> Maybe you could use the files under `/sys/devices/virtual/dmi/id/` like `board_vendor` and `board_name`?

It does not exist on Raspberry Pi OS.

pi at raspberrypi:~/github-forked/jdk $ lsb_release -a
No LSB modules are available.
Distributor ID: Debian
Description:    Debian GNU/Linux 10 (buster)
Release:        10
Codename:       buster
pi at raspberrypi:~/github-forked/jdk $ uname -a
Linux raspberrypi 5.10.11-v8+ #1399 SMP PREEMPT Thu Jan 28 12:14:03 GMT 2021 aarch64 GNU/Linux
pi at raspberrypi:~/github-forked/jdk $ ls /sys/devices/virtual/dmi/id/
ls: cannot access '/sys/devices/virtual/dmi/id/': No such file or directory
pi at raspberrypi:~/github-forked/jdk $ ls /sys/devices/virtual/dmi/
ls: cannot access '/sys/devices/virtual/dmi/': No such file or directory
pi at raspberrypi:~/github-forked/jdk $ ls /sys/devices/virtual/
bcm2708_vcio     block     graphics  mem   raw             rpivid-intcmem  thermal  vc-mem
bcm2835-gpiomem  devlink   input     misc  rpivid-h264mem  rpivid-vp9mem   tty      vtconsole
bdi              dma_heap  leds      net   rpivid-hevcmem  sound           vc       workqueue

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PR: https://git.openjdk.java.net/jdk/pull/2759