From: Claire Chang <tientzu@chromium.org>
To: Rob Herring <robh+dt@kernel.org>,
mpe@ellerman.id.au, Joerg Roedel <joro@8bytes.org>,
Will Deacon <will@kernel.org>,
Frank Rowand <frowand.list@gmail.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
boris.ostrovsky@oracle.com, jgross@suse.com,
Christoph Hellwig <hch@lst.de>,
Marek Szyprowski <m.szyprowski@samsung.com>
Cc: benh@kernel.crashing.org, paulus@samba.org,
"list@263.net:IOMMU DRIVERS" <iommu@lists.linux-foundation.org>,
sstabellini@kernel.org, Robin Murphy <robin.murphy@arm.com>,
grant.likely@arm.com, xypron.glpk@gmx.de,
Thierry Reding <treding@nvidia.com>,
mingo@kernel.org, bauerman@linux.ibm.com, peterz@infradead.org,
Greg KH <gregkh@linuxfoundation.org>,
Saravana Kannan <saravanak@google.com>,
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heikki.krogerus@linux.intel.com,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Randy Dunlap <rdunlap@infradead.org>,
Dan Williams <dan.j.williams@intel.com>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
linux-devicetree <devicetree@vger.kernel.org>,
lkml <linux-kernel@vger.kernel.org>,
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Jim Quinlan <james.quinlan@broadcom.com>,
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chris@chris-wilson.co.uk, tientzu@chromium.org, daniel@ffwll.ch,
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Subject: [PATCH v6 03/15] swiotlb: Add DMA_RESTRICTED_POOL
Date: Mon, 10 May 2021 17:50:14 +0800 [thread overview]
Message-ID: <20210510095026.3477496-4-tientzu@chromium.org> (raw)
In-Reply-To: <20210510095026.3477496-1-tientzu@chromium.org>
Add a new kconfig symbol, DMA_RESTRICTED_POOL, for restricted DMA pool.
Signed-off-by: Claire Chang <tientzu@chromium.org>
---
kernel/dma/Kconfig | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig
index 77b405508743..3e961dc39634 100644
--- a/kernel/dma/Kconfig
+++ b/kernel/dma/Kconfig
@@ -80,6 +80,20 @@ config SWIOTLB
bool
select NEED_DMA_MAP_STATE
+config DMA_RESTRICTED_POOL
+ bool "DMA Restricted Pool"
+ depends on OF && OF_RESERVED_MEM
+ select SWIOTLB
+ help
+ This enables support for restricted DMA pools which provide a level of
+ DMA memory protection on systems with limited hardware protection
+ capabilities, such as those lacking an IOMMU.
+
+ For more information see
+ <Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt>
+ and <kernel/dma/swiotlb.c>.
+ If unsure, say "n".
+
#
# Should be selected if we can mmap non-coherent mappings to userspace.
# The only thing that is really required is a way to set an uncached bit
--
2.31.1.607.g51e8a6a459-goog
next prev parent reply other threads:[~2021-05-10 9:51 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-10 9:50 [PATCH v6 00/15] Restricted DMA Claire Chang
2021-05-10 9:50 ` [PATCH v6 01/15] swiotlb: Refactor swiotlb init functions Claire Chang
2021-05-10 14:58 ` Christoph Hellwig
2021-05-10 9:50 ` [PATCH v6 02/15] swiotlb: Refactor swiotlb_create_debugfs Claire Chang
2021-05-10 14:59 ` Christoph Hellwig
2021-05-10 9:50 ` Claire Chang [this message]
2021-05-10 9:50 ` [PATCH v6 04/15] swiotlb: Add restricted DMA pool initialization Claire Chang
2021-05-10 15:02 ` Christoph Hellwig
2021-05-11 16:42 ` Claire Chang
2021-05-10 9:50 ` [PATCH v6 05/15] swiotlb: Add a new get_io_tlb_mem getter Claire Chang
2021-05-10 15:03 ` Christoph Hellwig
2021-05-11 16:42 ` Claire Chang
2021-05-10 9:50 ` [PATCH v6 06/15] swiotlb: Update is_swiotlb_buffer to add a struct device argument Claire Chang
2021-05-10 9:50 ` [PATCH v6 07/15] swiotlb: Update is_swiotlb_active " Claire Chang
2021-05-10 9:50 ` [PATCH v6 08/15] swiotlb: Bounce data from/to restricted DMA pool if available Claire Chang
2021-05-10 15:05 ` Christoph Hellwig
2021-05-11 16:42 ` Claire Chang
2021-05-10 9:50 ` [PATCH v6 09/15] swiotlb: Move alloc_size to find_slots Claire Chang
2021-05-10 9:50 ` [PATCH v6 10/15] swiotlb: Refactor swiotlb_tbl_unmap_single Claire Chang
2021-05-10 9:50 ` [PATCH v6 11/15] dma-direct: Add a new wrapper __dma_direct_free_pages() Claire Chang
2021-05-10 9:50 ` [PATCH v6 12/15] swiotlb: Add restricted DMA alloc/free support Claire Chang
2021-05-10 9:50 ` [PATCH v6 13/15] dma-direct: Allocate memory from restricted DMA pool if available Claire Chang
2021-05-10 9:50 ` [PATCH v6 14/15] dt-bindings: of: Add restricted DMA pool Claire Chang
2021-05-10 9:50 ` [PATCH v6 15/15] of: Add plumbing for " Claire Chang
2021-05-18 6:54 ` [PATCH v6 00/15] Restricted DMA Claire Chang
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