From: Christoph Hellwig <hch@infradead.org>
To: Matthew Rosato <mjrosato@linux.ibm.com>
Cc: joro@8bytes.org, will@kernel.org, robin.murphy@arm.com,
gerald.schaefer@linux.ibm.com, schnelle@linux.ibm.com,
hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com,
svens@linux.ibm.com, borntraeger@linux.ibm.com,
farman@linux.ibm.com, clegoate@redhat.com, iommu@lists.linux.dev,
linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Subject: Re: [PATCH 2/6] s390: enable ARCH_HAS_PHYS_TO_DMA
Date: Mon, 9 Dec 2024 20:33:19 -0800 [thread overview]
Message-ID: <Z1fEj_6beeRdGpJL@infradead.org> (raw)
In-Reply-To: <20241209192403.107090-3-mjrosato@linux.ibm.com>
On Mon, Dec 09, 2024 at 02:23:59PM -0500, Matthew Rosato wrote:
> PCI devices on s390 have a DMA offset that is reported via CLP. In
> preparation for allowing identity domains, enable ARCH_HAS_PHYS_TO_DMA
> for s390 and get the dma offset for all PCI devices from the reported
> CLP value.
Nothing new should select ARCH_HAS_PHYS_TO_DMA, please fill out the
bus_dma_region attached to the device instead.
next prev parent reply other threads:[~2024-12-10 4:33 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-09 19:23 [PATCH 0/6] iommu/s390: add support for IOMMU passthrough Matthew Rosato
2024-12-09 19:23 ` [PATCH 1/6] s390/pci: check for relaxed translation capability Matthew Rosato
2024-12-09 19:23 ` [PATCH 2/6] s390: enable ARCH_HAS_PHYS_TO_DMA Matthew Rosato
2024-12-10 4:33 ` Christoph Hellwig [this message]
2024-12-10 21:23 ` Matthew Rosato
2024-12-09 19:24 ` [PATCH 3/6] iommu/s390: implement iommu passthrough via identity domain Matthew Rosato
2024-12-09 19:24 ` [PATCH 4/6] iommu: add routine to check strict setting Matthew Rosato
2024-12-09 19:24 ` [PATCH 5/6] iommu: document missing def_domain_type return Matthew Rosato
2024-12-10 2:57 ` Baolu Lu
2024-12-10 16:26 ` Matthew Rosato
2024-12-10 18:42 ` Robin Murphy
2024-12-10 22:06 ` Matthew Rosato
2024-12-11 18:42 ` Robin Murphy
2024-12-09 19:24 ` [PATCH 6/6] iommu/s390: implement def_domain_type Matthew Rosato
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