EC2 ARM64 "bare metal" instances

[Michael Tuexen]

> On 16. Oct 2019, at 18:51, Colin Percival <cperciva at tarsnap.com> wrote:
> 
> Hi ARM experts,
> 
> FreeBSD does not currently boot on Amazon's recently released "bare metal"
> ARM64 instances.  It might be useful to get these working, since they're
> reasonably powered hardware (16 cores, 32 GB RAM) and should be able to run
> bhyve (that's the "bare metal" part).
Not sure we have bhyve support for arm64 in tree right now...
> 
> Right now the boot is failing because FreeBSD is not finding the disk (or
> the network adapter, for that matter):
Isn't your device similar to
https://dmesgd.nycbug.org/index.cgi?do=view&id=4813

Best regards
Michael
> 
> http://www.daemonology.net/tmp/a1.metal.boot_verbose
> 
> Ed suggested that I get a listing of PCI devices from Linux (which does boot
> on these systems), and it looks like the missing devices are attached to PCI
> domains 2 and 3 (aka pci0 and pci1):
> 
> http://www.daemonology.net/tmp/a1.metal.lspci-v
> 
> I'm aware of a few patches these systems needed in order to work on Linux:
> 
> 1. Respecting ACPI _DSM "PCI Boot Configuration":
> https://github.com/torvalds/linux/commit/a78cf9657ba5426f54aa93a067c10d097944c082
> 
> 2. Adding the Annapurna Labs PCIe controller driver:
> https://github.com/torvalds/linux/commit/4166bfe53093b687a0b1b22e5d943e143b8089b2
> https://github.com/torvalds/linux/commit/a8daea94754989f6c48dafda840482cbc9f882f9
> 
> 3. Something I don't understand at all about MSI:
> https://github.com/torvalds/linux/commit/90b4c55586155cf13bbafbd4e55327f89681859d
> 
> Can someone who knows more me about ARM64 / ACPI / PCIe / MSI take a look
> at these and figure out how to get this working in FreeBSD?
> 
> I'll be happy to test patches or to walk someone through the process of
> using EC2 so you can hack on this directly.
> 
> -- 
> Colin Percival
> Security Officer Emeritus, FreeBSD | The power to serve
> Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid
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