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Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kIWr9-0000Ah-53; Wed, 16 Sep 2020 12:48:15 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kIWr5-00008r-LZ for linux-arm-kernel@lists.infradead.org; Wed, 16 Sep 2020 12:48:12 +0000 Received: from localhost (unknown [213.57.247.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5E48F20672; Wed, 16 Sep 2020 12:48:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1600260490; bh=gGkHjWjs9t1Y0tRqxb4uEA1F6lmm4+9IJ9If5CWfkNs=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=cjP3VKTYnjltiS+BtFUMrZzU3rJT5mSlnTcc2sOHnE2VAYK7PI2/0iOlked/4d8U/ b1cVdjh1WgIU3x6ESQE+xqky/retMs+cmdj9AQ8VI0VZPTbL1f3iItlc9Mgh1F4Zaf UImnFttDfsD1rueURa06IQbf4nBnmjszy1MMFOl8= Date: Wed, 16 Sep 2020 15:48:06 +0300 From: Leon Romanovsky To: Benjamin Herrenschmidt Subject: Re: [PATCH] arm64: Enable PCI write-combine resources under sysfs Message-ID: <20200916124806.GJ486552@unreal> References: <20200914143819.GC904879@nvidia.com> <375c478593945a416f3180c3773bcb5240d2e36c.camel@kernel.crashing.org> <1d6f2ceb8d3538c906a1fdb8cd3d4c74ccffa42e.camel@kernel.crashing.org> <20200914225740.GP904879@nvidia.com> <2b539df4c9ec703458e46da2fc879ee3b310b31c.camel@kernel.crashing.org> <20200915101831.GA2616@e121166-lin.cambridge.arm.com> <20200915110511.GQ904879@nvidia.com> <20200915234006.GI1573713@nvidia.com> <701012f288231d0d0733bf1c2c8fdbd9caa074fd.camel@kernel.crashing.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <701012f288231d0d0733bf1c2c8fdbd9caa074fd.camel@kernel.crashing.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200916_084811_789327_C1E29F38 X-CRM114-Status: GOOD ( 15.13 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Lorenzo Pieralisi , linux-pci@vger.kernel.org, Bjorn Helgaas , Jason Gunthorpe , catalin.marinas@arm.com, will@kernel.org, linux-arm-kernel@lists.infradead.org, Clint Sbisa Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Sep 16, 2020 at 05:59:24PM +1000, Benjamin Herrenschmidt wrote: > On Tue, 2020-09-15 at 20:40 -0300, Jason Gunthorpe wrote: > > > Like I said, the case where the driver can't self test probably > > doesn't intersect with the ARM implementations that can't do write > > combining, and if it did, the users probably run the out of tree > > driver that has the hacky stuff to make it use DEVICE_GRE. > > Ok. So you are saying to go for it and ignore that Mellanox case then ? > :-) Regarding Mellanox, as I wrote it in the beginning of this thread, you can ignore mlx5 driver. https://lore.kernel.org/linux-pci/20200910105419.GH421756@unreal/ Thanks _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel