From: Tianyu Lan <ltykernel@gmail.com>
To: Christoph Hellwig <hch@lst.de>
Cc: kys@microsoft.com, haiyangz@microsoft.com,
sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com,
tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
x86@kernel.org, hpa@zytor.com, dave.hansen@linux.intel.com,
luto@kernel.org, peterz@infradead.org, konrad.wilk@oracle.com,
boris.ostrovsky@oracle.com, jgross@suse.com,
sstabellini@kernel.org, joro@8bytes.org, will@kernel.org,
davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com,
martin.petersen@oracle.com, arnd@arndb.de,
m.szyprowski@samsung.com, robin.murphy@arm.com,
thomas.lendacky@amd.com, brijesh.singh@amd.com, ardb@kernel.org,
Tianyu.Lan@microsoft.com, pgonda@google.com,
martin.b.radev@gmail.com, akpm@linux-foundation.org,
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parri.andrea@gmail.com, dave.hansen@intel.com
Subject: Re: [PATCH V3 10/13] x86/Swiotlb: Add Swiotlb bounce buffer remap function for HV IVM
Date: Thu, 19 Aug 2021 17:59:02 +0800 [thread overview]
Message-ID: <1c5ae861-2c35-2ef5-e764-db45bbcb88a9@gmail.com> (raw)
In-Reply-To: <20210819084951.GA10461@lst.de>
On 8/19/2021 4:49 PM, Christoph Hellwig wrote:
> On Mon, Aug 16, 2021 at 10:50:26PM +0800, Tianyu Lan wrote:
>> Hi Christoph:
>> Sorry to bother you.Please double check with these two patches
>> " [PATCH V3 10/13] x86/Swiotlb: Add Swiotlb bounce buffer remap function
>> for HV IVM" and "[PATCH V3 09/13] DMA: Add dma_map_decrypted/dma_
>> unmap_encrypted() function".
>
> Do you have a git tree somewhere to look at the whole tree?
Yes, here is my github link for these two patches.
https://github.com/lantianyu/linux/commit/462f7e4e44644fe7e182f7a5fb043a75acb90ee5
https://github.com/lantianyu/linux/commit/c8de236bf4366d39e8b98e5a091c39df29b03e0b
>
>> The swiotlb bounce buffer in the isolation VM are allocated in the
>> low end memory and these memory has struct page backing. All dma address
>> returned by swiotlb/DMA API are low end memory and this is as same as what
>> happen in the traditional VM.
>
> Indeed.
>
>> The API dma_map_decrypted() introduced in the patch 9 is to map the
>> bounce buffer in the extra space and these memory in the low end space are
>> used as DMA memory in the driver. Do you prefer these APIs
>> still in the set_memory.c? I move the API to dma/mapping.c due to the
>> suggested name arch_dma_map_decrypted() in the previous mail
>> (https://lore.kernel.org/netdev/20210720135437.GA13554@lst.de/).
>
> Well, what would help is a clear description of the semantics.
>
Yes, I will improve description.
next prev parent reply other threads:[~2021-08-19 9:59 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 [this message]
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 ` min_align_mask " hch
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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