From: Christoph Hellwig <hch@infradead.org>
To: Tushar Dave <tushar.n.dave@oracle.com>
Cc: davem@davemloft.net, chris.hyser@oracle.com,
sowmini.varadhan@oracle.com, vgupta@synopsys.com,
robin.murphy@arm.com, jroedel@suse.de, egtvedt@samfundet.no,
krzk@kernel.org, sparclinux@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [RFC PATCH 6/6] sparc64: Enable 64-bit DMA
Date: Fri, 7 Oct 2016 00:32:52 -0700 [thread overview]
Message-ID: <20161007073252.GA8290@infradead.org> (raw)
In-Reply-To: <1475796816-14448-7-git-send-email-tushar.n.dave@oracle.com>
On Thu, Oct 06, 2016 at 04:33:36PM -0700, Tushar Dave wrote:
> ATU 64bit addressing allows PCIe devices with 64bit DMA capabilities
> to use ATU for 64bit DMA.
Any chance to always enable this? Last I checked sparc was the only
architecture still using a 32-bit dma_addr_t, leading to some fun
breakage in things like the software RDMA drivers that abuse it to
store a kernel pointer..
next prev parent reply other threads:[~2016-10-07 7:33 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-10-06 23:33 [RFC PATCH 0/6] sparc: Enable sun4v hypervisor PCI IOMMU v2 APIs and ATU Tushar Dave
2016-10-06 23:33 ` [RFC PATCH 1/6] sparc64: Add FORCE_MAX_ZONEORDER and default to 13 Tushar Dave
2016-10-06 23:33 ` [RFC PATCH 2/6] sparc64: Add ATU (new IOMMU) support Tushar Dave
2016-10-06 23:33 ` [RFC PATCH 3/6] sparc64: Initialize iommu_map_table and iommu_pool Tushar Dave
2016-10-06 23:33 ` [RFC PATCH 4/6] sparc64: Bind PCIe devices to use IOMMU v2 service Tushar Dave
2016-10-06 23:33 ` [RFC PATCH 5/6] sparc64: Enable sun4v dma ops to use IOMMU v2 APIs Tushar Dave
2016-10-06 23:33 ` [RFC PATCH 6/6] sparc64: Enable 64-bit DMA Tushar Dave
2016-10-07 7:32 ` Christoph Hellwig [this message]
2016-10-07 8:09 ` tndave
2016-10-11 16:38 ` Christoph Hellwig
2016-10-11 19:42 ` tndave
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