Messages in this thread | | | Date | Sun, 12 Feb 2023 11:48:13 +0000 | From | Marc Zyngier <> | Subject | Re: [PATCH] irqchip/gic-v3: Allow 'dma-noncoherent' property for ITS |
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On Sun, 12 Feb 2023 09:35:05 +0000, Ben Dai <ben.dai9703@gmail.com> wrote: > > Currently the ITS driver expects the hardware to report whether it is > shareable, but according to the description of the GITS_CBASER register > in the GICv3 architecture specification: > > It is IMPLEMENTATION DEFINED whether this field has a fixed value or > > can be programmed by software. Implementing this field with a fixed > > value is deprecated. > > It means that the hardware may expect the software to correctly configure > the access attributes of the ITS. In order to support those designs where > ITS and CPU are not in a coherent domain, allow 'dma-noncoherent' property > for ITS.
No. This is an integration bug, most likely a Rockchip quality design. I have repeatedly explained how to deal with this, and I'm not going to do that again. Please search the list archives.
I will not be taking this sort of patch.
M.
-- Without deviation from the norm, progress is not possible.
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