Re: [PATCH] iommu/rockchip: implement .flush_iotlb_all

From: Jiaxing Hu <huhuvmb88@gmail.com>
To: "Heiko Stübner" <heiko@sntech.de>
Cc: Will Deacon <will@kernel.org>, Joerg Roedel <joro@8bytes.org>,
	Robin Murphy <robin.murphy@arm.com>,
	iommu@lists.linux.dev, linux-rockchip@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] iommu/rockchip: implement .flush_iotlb_all
Date: Sat, 11 Jul 2026 09:11:05 +1200	[thread overview]
Message-ID: <20260710211105.9782-1-huhuvmb88@gmail.com> (raw)
In-Reply-To: <20260710111508.917486-1-huhuvmb88@gmail.com>

On Fri, 10 Jul 2026, Heiko Stübner wrote:
> accel/rocket is in mainline, so I guess the interesting question is, why
> are you expecting your changes to be (stay?) out of tree?

Thanks. I had been treating it as exploratory: single-layer inference runs
on the open stack (rocket + Teflon) on RK3576, but chained inference does
not, and I narrowed the failure to below the software surface
(fixed-function hardware I cannot reach from an open board), so it felt too
unfinished to send.

But you are right that an RFC is the better way to handle it. I will clean
up the RK3576 bring-up (power domains, clocks, IOMMU, DPU/RDMA, DTS) into
an RFC against current mainline and post it, with the chained-task
limitation described honestly. If you can point me at who else is working
on the RK3576 NPU, I would be glad to compare notes.

Thanks,
Jiaxing