From: "hch@lst.de" <hch@lst.de>
To: Michael Kelley <mikelley@microsoft.com>
Cc: "hch@lst.de" <hch@lst.de>, Tianyu Lan <ltykernel@gmail.com>,
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Subject: min_align_mask Re: [PATCH V3 13/13] HV/Storvsc: Add Isolation VM support for storvsc driver
Date: Tue, 24 Aug 2021 10:49:34 +0200 [thread overview]
Message-ID: <20210824084934.GC29844@lst.de> (raw)
In-Reply-To: <CY4PR21MB1586FEB6F6ADD592C04E541BD7C19@CY4PR21MB1586.namprd21.prod.outlook.com>
On Fri, Aug 20, 2021 at 03:40:08PM +0000, Michael Kelley wrote:
> I see that the swiotlb code gets and uses the min_align_mask field. But
> the NVME driver is the only driver that ever sets it, so the value is zero
> in all other cases. Does swiotlb just use PAGE_SIZE in that that case? I
> couldn't tell from a quick glance at the swiotlb code.
The encoding isn't all that common. I only know it for the RDMA memory
registration format, and RDMA in general does not interact very well
with swiotlb (although the in-kernel drivers should work fine, it is
userspace RDMA that is the problem). It seems recently a new driver
using the format (mpi3mr) also showed up. All these should probably set
the min_align_mask.
next prev parent reply other threads:[~2021-08-24 8:49 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-09 17:56 [PATCH V3 00/13] x86/Hyper-V: Add Hyper-V Isolation VM support Tianyu Lan
2021-08-09 17:56 ` [PATCH V3 01/13] x86/HV: Initialize GHCB page in Isolation VM Tianyu Lan
2021-08-10 10:56 ` Wei Liu
2021-08-10 12:17 ` Tianyu Lan
2021-08-12 19:14 ` Michael Kelley
2021-08-13 15:46 ` Tianyu Lan
2021-08-09 17:56 ` [PATCH V3 02/13] x86/HV: Initialize shared memory boundary in the " Tianyu Lan
2021-08-12 19:18 ` Michael Kelley
2021-08-14 13:32 ` Tianyu Lan
2021-08-09 17:56 ` [PATCH V3 03/13] x86/HV: Add new hvcall guest address host visibility support Tianyu Lan
2021-08-09 22:12 ` Dave Hansen
2021-08-10 13:09 ` Tianyu Lan
2021-08-10 11:03 ` Wei Liu
2021-08-10 12:25 ` Tianyu Lan
2021-08-12 19:36 ` Michael Kelley
2021-08-12 21:10 ` Michael Kelley
2021-08-09 17:56 ` [PATCH V3 04/13] HV: Mark vmbus ring buffer visible to host in Isolation VM Tianyu Lan
2021-08-12 22:20 ` Michael Kelley
2021-08-15 15:21 ` Tianyu Lan
2021-08-09 17:56 ` [PATCH V3 05/13] HV: Add Write/Read MSR registers via ghcb page Tianyu Lan
2021-08-13 19:31 ` Michael Kelley
2021-08-13 20:26 ` Michael Kelley
2021-08-24 8:45 ` Christoph Hellwig
2021-08-09 17:56 ` [PATCH V3 06/13] HV: Add ghcb hvcall support for SNP VM Tianyu Lan
2021-08-13 20:42 ` Michael Kelley
2021-08-09 17:56 ` [PATCH V3 07/13] HV/Vmbus: Add SNP support for VMbus channel initiate message Tianyu Lan
2021-08-13 21:28 ` Michael Kelley
2021-08-09 17:56 ` [PATCH V3 08/13] HV/Vmbus: Initialize VMbus ring buffer for Isolation VM Tianyu Lan
2021-08-16 17:28 ` Michael Kelley
2021-08-17 15:36 ` Tianyu Lan
2021-08-09 17:56 ` [PATCH V3 09/13] DMA: Add dma_map_decrypted/dma_unmap_encrypted() function Tianyu Lan
2021-08-12 12:26 ` Christoph Hellwig
2021-08-12 15:38 ` Tianyu Lan
2021-08-09 17:56 ` [PATCH V3 10/13] x86/Swiotlb: Add Swiotlb bounce buffer remap function for HV IVM Tianyu Lan
2021-08-12 12:27 ` Christoph Hellwig
2021-08-13 17:58 ` Tianyu Lan
2021-08-16 14:50 ` Tianyu Lan
2021-08-19 8:49 ` Christoph Hellwig
2021-08-19 9:59 ` Tianyu Lan
2021-08-19 10:02 ` Christoph Hellwig
2021-08-19 10:03 ` Tianyu Lan
2021-08-09 17:56 ` [PATCH V3 11/13] HV/IOMMU: Enable swiotlb bounce buffer for Isolation VM Tianyu Lan
2021-08-19 18:11 ` Michael Kelley
2021-08-20 4:13 ` hch
2021-08-20 9:32 ` Tianyu Lan
2021-08-09 17:56 ` [PATCH V3 12/13] HV/Netvsc: Add Isolation VM support for netvsc driver Tianyu Lan
2021-08-19 18:14 ` Michael Kelley
2021-08-20 4:21 ` hch
2021-08-20 13:11 ` Tianyu Lan
2021-08-20 13:30 ` Tom Lendacky
2021-08-20 18:20 ` Tianyu Lan
2021-08-09 17:56 ` [PATCH V3 13/13] HV/Storvsc: Add Isolation VM support for storvsc driver Tianyu Lan
2021-08-19 18:17 ` Michael Kelley
2021-08-20 4:32 ` hch
2021-08-20 15:40 ` Michael Kelley
2021-08-24 8:49 ` hch [this message]
2021-08-20 16:01 ` Tianyu Lan
2021-08-20 15:20 ` Tianyu Lan
2021-08-20 15:37 ` Tianyu Lan
2021-08-20 16:08 ` Michael Kelley
2021-08-20 18:04 ` Tianyu Lan
2021-08-20 19:22 ` Michael Kelley
2021-08-24 8:46 ` hch
2021-08-16 14:55 ` [PATCH V3 00/13] x86/Hyper-V: Add Hyper-V Isolation VM support Michael Kelley
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