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Re: [Qemu-devel] [PATCH 0/2] Remove CP15 timer from the device tree if K
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From: |
Pavel Fedin |
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Subject: |
Re: [Qemu-devel] [PATCH 0/2] Remove CP15 timer from the device tree if KVM is used without in-kernel irqchip |
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Date: |
Thu, 25 Jun 2015 15:14:50 +0300 |
Hi!
> If we want to support "KVM but without in-kernel irqchip" I would
> really prefer that we did it this way, by implementing an ABI for
> letting the kernel tell us about the generic timer interrupts
Yes, but:
1. This would work only for newer kernels.
2. This little patch allows to work on older kernels, at least somehow.
> IIRC chazy had a hacked-together patch for that at some point.
Who is it? Where can i find it?
> Is hardware with no working VGIC really prevalent enough that
> it's worth adding support? Presumably the performance isn't going
> to be very good...
At least RaspberryPi 2, as far as i know. Also i am testing on some Samsung
proprietary HW which has the same problem.
Kind regards,
Pavel Fedin
Expert Engineer
Samsung Electronics Research center Russia