Iommu swiotlb
WebLKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH 0/3] Small fixes for swiotlb @ 2024-07-15 10:45 Chao Gao 2024-07-15 10:45 ` [PATCH 1/3] swiotlb: remove unused fields in io_tlb_mem Chao Gao ` (3 more replies) 0 siblings, 4 replies; 5+ messages in thread From: Chao Gao @ 2024-07-15 10:45 UTC (permalink / raw) To: … Web12 jun. 2024 · Use software bounce buffering (SWIOTLB) ( default for Intel machines ). This can be used to prevent the usage of an available hardware IOMMU. Now, Intel IOMMU: …
Iommu swiotlb
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Web10 aug. 2024 · In the last post IOMMU introduction we have got the basic idea of what is IOMMU and what it is for. In this post, we will dig into the intel-iommu driver source. The … Web*RFC PATCH 0/2] swiotlb: Introduce swiotlb device allocation function @ 2024-04-28 14:14 Tianyu Lan 2024-04-28 14:14 ` [RFC PATCH 1/2] swiotlb: Split up single swiotlb lock Tianyu Lan 2024-04-28 14:14 ` [RFC PATCH 2/2] Swiotlb: Add device bounce buffer allocation interface Tianyu Lan 0 siblings, 2 replies; 16+ messages in thread From: …
Web22 mrt. 2024 · SWIOTLB概述上一篇文章已经提到，IOMMU的核心功能就是，实现在low buffer和high buffer之间的sync，也就是内存内容的复制操作。读者可能会想，内存的复 … Web[PATCH 2/3] swiotlb: use the right nslabs value in swiotlb_init_remap Christoph Hellwig Wed, 11 May 2024 05:58:22 -0700 default_nslabs should only be used to initialize nslabs, after that we need to use the local variable that can …
WebWe're almost done removing all knowledge of swiotlb from drivers, > so the very last thing I want is an interface that allows a driver to > allocate a per-device buffer. At least for TDX need parallelism with a single device for performance. So if you split up the io tlb mems for a device then you would need a new mechanism to load balance the ... WebI've double check and it seems like all of the dma_map_sg and scsi_dma_map are being correctly unmapped in my SCSI host driver when each scsi command completes. I have also tried increasing the SW-IOMMU space by setting the kernel command line parameter swiommu to 1048576, but that didn't seem to change anything.
Web13 aug. 2024 · ia64 currently organizes the iommu probing along machves, which isn't very helpful. Instead just try to probe for Intel IOMMUs in mem_init as they are properly described in ACPI and if none was found initialize the swiotlb buffer. The HP SBA handling is then only done delayed when the actual hardware is probed.
http://www.mulix.org/lectures/using-iommus-for-virtualization/OLS-jdmason.pdf duke school of medicine financial aidWebThis is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).mirroring instructions … duke school of medicine locationWebFixed immutable swiotlb size cannot accommodate to requirements of > multiple devices. And 1GiB (current maximum size) of swiotlb in our > testbed cannot afford multiple disks reads/writes simultaneously. That's not a very logical argument - if a particular use-case needs a particular total amount of SWIOTLB capacity, then that's how much it needs. community center leaderWeb9 feb. 2024 · FS#57213 - iwlwifi: swiotlb buffer is full - DMA: Out of SW-IOMMU space for 4096 bytes. Attached to Project: Arch Linux. Opened by Prem Anand (hprem) - Wednesday, 24 January 2024, 10:03 GMT. Last edited by Doug Newgard (Scimmia) - Tuesday, 13 February 2024, 13:28 GMT. Task Type. duke school of medicine financeWebDuring initializing swiotlb bounce buffer pool, only address bellow shared gpa boundary can be accepted by swiotlb API because it is treated as system memory and managed by memory management. This is why Hyper-V swiotlb bounce buffer pool needs to be allocated in Hyper-V code and map associated physical address in extra address space. community center lebanon tnWebSystems with mainly. * 64bit capable cards will only lightly use the swiotlb. If we can't. * allocate a contiguous 1MB, we're probably in trouble anyway. static unsigned long … duke school of medicine hrWebswiotlb buffer. Ideally your hardware should have an iommu as bouncing is not cheap. Most architectures using swiotlb seem to use the default size of 64MB (with the risk of wasting too much memory on smaller systems). That's what we had on arm64 before commit 3690951fc6d42f3a (arm64: Use swiotlb duke school of medicine registrar