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From: Christoph Hellwig <hch@lst.de>
To: iommu@lists.linux-foundation.org
Cc: Robin Murphy <robin.murphy@arm.com>,
	David Rientjes <rientjes@google.com>
Subject: dma-direct fixes and cleanups v3
Date: Thu, 11 Nov 2021 07:50:16 +0100	[thread overview]
Message-ID: <20211111065028.32761-1-hch@lst.de> (raw)

Hi all,

Linus complained about the complex flow in dma_direct_alloc, so this
tries to simplify it a bit, and while I was at it I also made sure that
unencrypted pages never leak back into the page allocator.

Changes since v2:
 - don't call dma_set_decrypted on remapped memory
 - move the leak printk into dma_set_encrypted
 - add another local variable to clean up dma_direct_alloc
 - return NULL when the is no way to make the memory coherent

Changes since v1:
 - fix a missing return
 - add a new patch to fix a pre-existing missing unmap
 - various additional cleanups
 
Diffstat:
 direct.c |  234 +++++++++++++++++++++++++++++++++++++--------------------------
 1 file changed, 138 insertions(+), 96 deletions(-)
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             reply	other threads:[~2021-11-11  6:50 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-11  6:50 Christoph Hellwig [this message]
2021-11-11  6:50 ` [PATCH 01/11] dma-direct: factor out dma_set_{de,en}crypted helpers Christoph Hellwig
2021-11-11  6:50 ` [PATCH 02/11] dma-direct: don't call dma_set_decrypted for remapped allocations Christoph Hellwig
2021-11-11  6:50 ` [PATCH 03/11] dma-direct: always leak memory that can't be re-encrypted Christoph Hellwig
2021-12-06 16:32   ` Robin Murphy
2021-12-07 11:48     ` Christoph Hellwig
2021-11-11  6:50 ` [PATCH 04/11] dma-direct: clean up the remapping checks in dma_direct_alloc Christoph Hellwig
2021-12-06 16:33   ` Robin Murphy
2021-12-07 11:49     ` Christoph Hellwig
2021-12-07 12:43       ` Robin Murphy
2021-11-11  6:50 ` [PATCH 05/11] dma-direct: factor out a helper for DMA_ATTR_NO_KERNEL_MAPPING allocations Christoph Hellwig
2021-11-11  6:50 ` [PATCH 06/11] dma-direct: refactor the !coherent checks in dma_direct_alloc Christoph Hellwig
2021-12-06 16:33   ` Robin Murphy
2021-11-11  6:50 ` [PATCH 07/11] dma-direct: fail allocations that can't be made coherent Christoph Hellwig
2021-12-06 16:33   ` Robin Murphy
2021-11-11  6:50 ` [PATCH 08/11] dma-direct: warn if there is no pool for force unencrypted allocations Christoph Hellwig
2021-11-11  6:50 ` [PATCH 09/11] dma-direct: drop two CONFIG_DMA_RESTRICTED_POOL conditionals Christoph Hellwig
2021-11-11  6:50 ` [PATCH 10/11] dma-direct: factor the swiotlb code out of __dma_direct_alloc_pages Christoph Hellwig
2021-11-11  6:50 ` [PATCH 11/11] dma-direct: add a dma_direct_use_pool helper Christoph Hellwig
     [not found]   ` <CGME20211208154459eucas1p24743399c20b5d1fbc3f519d68d9660a6@eucas1p2.samsung.com>
2021-12-08 15:44     ` Marek Szyprowski
2021-12-08 15:48       ` Christoph Hellwig
2021-11-16 11:31 ` dma-direct fixes and cleanups v3 Robin Murphy
2021-11-17  5:51   ` Christoph Hellwig

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