Messages in this thread | | | Date | Sat, 14 Nov 2020 11:37:57 +0000 | From | Marc Zyngier <> | Subject | Re: [PATCH kernel v3] genirq/irqdomain: Add reference counting to IRQs |
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On 2020-11-14 03:37, Alexey Kardashevskiy wrote:
>>> What is the easiest way to get irq-hierarchical hardware? >>> I have a bunch of powerpc boxes (no good) but also a raspberry pi, >>> a bunch of 32/64bit orange pi's, an "armada" arm box, >>> thinkpads - is any of this good for the task? >> >> If your HW doesn't require an interrupt hierarchy, run VMs! >> Booting an arm64 guest with virtual PCI devices will result in >> hierarchies being created (PCI-MSI -> GIC MSI widget -> GIC). > > Absolutely :) But the beauty of ARM is that one can buy an actual ARM > device for 20$, I have "opi one+ allwinner h6 64bit cortex a53 1GB > RAM", is it worth using KVM on this device, or is it too small for > that?
I've run VMs on smaller machines. 256MB of guest RAM is enough to boot a full blown Debian system with PCI devices, and your AW box should be up to the task as long as you run a mainline kernel on it. Please don't add to the pile of junk!
>> You can use KVM, or even bare QEMU on x86 if you are so inclined. > > Have a QEMU command line handy for x86/tcg?
/me digs, as my x86 boxes are overspec'd X terminals these days:
Here you go, courtesy of Will: http://cdn.kernel.org/pub/linux/kernel/people/will/docs/qemu/qemu-arm64-howto.html
M. -- Jazz is not dead. It just smells funny...
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