From: Pavel Fedin <p.fedin@samsung.com>
To: 'Peter Maydell' <peter.maydell@linaro.org>
Cc: 'Peter Crosthwaite' <peter.crosthwaite@xilinx.com>,
'QEMU Developers' <qemu-devel@nongnu.org>,
'Alexander Graf' <agraf@suse.de>
Subject: Re: [Qemu-devel] [PATCH 0/2] Remove CP15 timer from the device tree if KVM is used without in-kernel irqchip
Date: Thu, 25 Jun 2015 15:14:50 +0300 [thread overview]
Message-ID: <012f01d0af40$8a5999c0$9f0ccd40$@samsung.com> (raw)
In-Reply-To: <CAFEAcA8EOekfg63Kr3VN2vbw23N_Dgp8_rYuBfe67OD_ur3Exg@mail.gmail.com>
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
next prev parent reply other threads:[~2015-06-25 12:15 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-24 11:58 [Qemu-devel] [PATCH 0/2] Remove CP15 timer from the device tree if KVM is used without in-kernel irqchip Pavel Fedin
2015-06-24 11:58 ` [Qemu-devel] [PATCH 1/2] Introduce qemu_fdt_remove_compatible() Pavel Fedin
2015-06-24 11:58 ` [Qemu-devel] [PATCH 2/2] Remove CP15 timer from the device tree if KVM is used without in-kernel irqchip Pavel Fedin
2015-06-25 6:22 ` [Qemu-devel] [PATCH 0/2] " Peter Crosthwaite
2015-06-25 10:50 ` Pavel Fedin
2015-06-25 10:59 ` Peter Maydell
2015-06-25 12:14 ` Pavel Fedin [this message]
2015-06-25 12:27 ` Peter Maydell
2015-06-25 13:21 ` Pavel Fedin
2015-06-25 14:17 ` Peter Maydell
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