From: Christoph Hellwig <hch@lst.de>
To: iommu@lists.linux-foundation.org
Cc: x86@kernel.org, Anshuman Khandual <anshuman.khandual@arm.com>,
Tom Lendacky <thomas.lendacky@amd.com>,
Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>,
Stefano Stabellini <sstabellini@kernel.org>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Juergen Gross <jgross@suse.com>, Joerg Roedel <joro@8bytes.org>,
David Woodhouse <dwmw2@infradead.org>,
Lu Baolu <baolu.lu@linux.intel.com>,
Robin Murphy <robin.murphy@arm.com>,
linux-arm-kernel@lists.infradead.org,
xen-devel@lists.xenproject.org, linux-ia64@vger.kernel.org,
linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org,
linux-hyperv@vger.kernel.org, tboot-devel@lists.sourceforge.net,
linux-pci@vger.kernel.org
Subject: [PATCH 02/15] swiotlb: make swiotlb_exit a no-op if SWIOTLB_FORCE is set
Date: Mon, 4 Apr 2022 07:05:46 +0200 [thread overview]
Message-ID: <20220404050559.132378-3-hch@lst.de> (raw)
In-Reply-To: <20220404050559.132378-1-hch@lst.de>
If force bouncing is enabled we can't release the buffers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
kernel/dma/swiotlb.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 73a41cec9e386..98bb0eb44a7bf 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -369,6 +369,9 @@ void __init swiotlb_exit(void)
unsigned long tbl_vaddr;
size_t tbl_size, slots_size;
+ if (swiotlb_force == SWIOTLB_FORCE)
+ return;
+
if (!mem->nslabs)
return;
--
2.30.2
next prev parent reply other threads:[~2022-04-04 5:06 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-04 5:05 cleanup swiotlb initialization v8 Christoph Hellwig
2022-04-04 5:05 ` [PATCH 01/15] dma-direct: use is_swiotlb_active in dma_direct_map_page Christoph Hellwig
2022-04-04 5:05 ` Christoph Hellwig [this message]
2022-04-04 5:05 ` [PATCH 03/15] swiotlb: simplify swiotlb_max_segment Christoph Hellwig
2022-04-04 5:05 ` [PATCH 04/15] swiotlb: rename swiotlb_late_init_with_default_size Christoph Hellwig
2022-04-04 5:05 ` [PATCH 05/15] arm/xen: don't check for xen_initial_domain() in xen_create_contiguous_region Christoph Hellwig
2022-04-04 5:05 ` [PATCH 06/15] MIPS/octeon: use swiotlb_init instead of open coding it Christoph Hellwig
2022-04-04 5:05 ` [PATCH 07/15] x86: remove the IOMMU table infrastructure Christoph Hellwig
2022-04-07 0:20 ` Konrad Rzeszutek Wilk
2022-04-04 5:05 ` [PATCH 08/15] x86: centralize setting SWIOTLB_FORCE when guest memory encryption is enabled Christoph Hellwig
2022-04-04 5:05 ` [PATCH 09/15] swiotlb: make the swiotlb_init interface more useful Christoph Hellwig
2022-04-04 17:00 ` Michael Kelley (LINUX)
2022-06-01 17:25 ` Nathan Chancellor
2022-06-01 17:34 ` Christoph Hellwig
[not found] ` <YpemDuzdoaO3rijX@Ryzen-9-3900X.>
2022-06-01 17:57 ` Christoph Hellwig
2022-06-01 18:11 ` Nathan Chancellor
2022-06-01 18:21 ` Christoph Hellwig
2022-06-01 18:40 ` Nathan Chancellor
2022-04-04 5:05 ` [PATCH 10/15] swiotlb: add a SWIOTLB_ANY flag to lift the low memory restriction Christoph Hellwig
2022-04-07 0:25 ` Konrad Rzeszutek Wilk
2022-04-12 6:21 ` Christoph Hellwig
2022-04-04 5:05 ` [PATCH 11/15] swiotlb: pass a gfp_mask argument to swiotlb_init_late Christoph Hellwig
2022-04-04 5:05 ` [PATCH 12/15] swiotlb: provide swiotlb_init variants that remap the buffer Christoph Hellwig
2022-04-04 7:09 ` Dongli Zhang
2022-04-04 5:05 ` [PATCH 13/15] swiotlb: merge swiotlb-xen initialization into swiotlb Christoph Hellwig
2022-04-04 5:05 ` [PATCH 14/15] swiotlb: remove swiotlb_init_with_tbl and swiotlb_init_late_with_tbl Christoph Hellwig
2022-04-04 5:05 ` [PATCH 15/15] x86: remove cruft from <asm/dma-mapping.h> Christoph Hellwig
[not found] ` <67c1784af6f24f3e871ddfb1478e821c@FR3P281MB0843.DEUP281.PROD.OUTLOOK.COM>
2022-04-04 6:19 ` [PATCH 12/15] swiotlb: provide swiotlb_init variants that remap the buffer Alan Robinson
2022-04-05 20:06 ` cleanup swiotlb initialization v8 Boris Ostrovsky
2022-04-07 0:31 ` Konrad Rzeszutek Wilk
2022-04-13 6:20 ` Christoph Hellwig
-- strict thread matches above, loose matches on Subject: below --
2022-03-14 7:31 cleanup swiotlb initialization v5 Christoph Hellwig
2022-03-14 7:31 ` [PATCH 02/15] swiotlb: make swiotlb_exit a no-op if SWIOTLB_FORCE is set Christoph Hellwig
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