From: Christoph Hellwig <hch@lst•de>
To: Tianyu Lan <ltykernel@gmail•com>
Cc: Christoph Hellwig <hch@lst•de>,
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,
kirill.shutemov@linux•intel.com, akpm@linux-foundation•org,
rppt@kernel•org, Tianyu.Lan@microsoft•com,
thomas.lendacky@amd•com, ardb@kernel•org, robh@kernel•org,
nramas@linux•microsoft.com, pgonda@google•com,
martin.b.radev@gmail•com, david@redhat•com,
krish.sadhukhan@oracle•com, saravanand@fb•com,
xen-devel@lists•xenproject.org, keescook@chromium•org,
rientjes@google•com, hannes@cmpxchg•org,
michael.h.kelley@microsoft•com, iommu@lists•linux-foundation.org,
linux-arch@vger•kernel.org, linux-hyperv@vger•kernel.org,
linux-kernel@vger•kernel.org, linux-scsi@vger•kernel.org,
netdev@vger•kernel.org, vkuznets@redhat•com,
brijesh.singh@amd•com, anparri@microsoft•com
Subject: Re: [Resend RFC PATCH V4 09/13] x86/Swiotlb/HV: Add Swiotlb bounce buffer remap function for HV IVM
Date: Wed, 21 Jul 2021 16:33:55 +0200 [thread overview]
Message-ID: <20210721143355.GA10848@lst.de> (raw)
In-Reply-To: <8f1a285d-4b67-8041-d326-af565b2756c0@gmail.com>
On Wed, Jul 21, 2021 at 06:28:48PM +0800, Tianyu Lan wrote:
> dma_mmap_attrs() and dma_get_sgtable_attrs() get input virtual address
> belonging to backing memory with struct page and returns bounce buffer
> dma physical address which is below shared_gpa_boundary(vTOM) and passed
> to Hyper-V via vmbus protocol.
>
> The new map virtual address is only to access bounce buffer in swiotlb
> code and will not be used other places. It's stored in the mem->vstart.
> So the new API set_memory_decrypted_map() in this series is only called
> in the swiotlb code. Other platforms may replace set_memory_decrypted()
> with set_memory_decrypted_map() as requested.
It seems like you are indeed not using these new helpers in
dma_direct_alloc. How is dma_alloc_attrs/dma_alloc_coherent going to
work on these systems?
next prev parent reply other threads:[~2021-07-21 14:34 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-07 15:46 [Resend RFC PATCH V4 00/13] x86/Hyper-V: Add Hyper-V Isolation VM support Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 01/13] x86/HV: Initialize GHCB page in Isolation VM Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 02/13] x86/HV: Initialize shared memory boundary in the " Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 03/13] x86/HV: Add new hvcall guest address host visibility support Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 04/13] HV: Mark vmbus ring buffer visible to host in Isolation VM Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 05/13] HV: Add Write/Read MSR registers via ghcb page Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 06/13] HV: Add ghcb hvcall support for SNP VM Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 07/13] HV/Vmbus: Add SNP support for VMbus channel initiate message Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 08/13] HV/Vmbus: Initialize VMbus ring buffer for Isolation VM Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 09/13] x86/Swiotlb/HV: Add Swiotlb bounce buffer remap function for HV IVM Tianyu Lan
2021-07-20 10:42 ` Tianyu Lan
2021-07-20 13:54 ` Christoph Hellwig
2021-07-21 10:28 ` Tianyu Lan
2021-07-21 14:33 ` Christoph Hellwig [this message]
2021-07-21 15:11 ` Tianyu Lan
2021-08-13 16:43 ` Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 10/13] HV/IOMMU: Enable swiotlb bounce buffer for Isolation VM Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 11/13] HV/Netvsc: Add Isolation VM support for netvsc driver Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 12/13] HV/Storvsc: Add Isolation VM support for storvsc driver Tianyu Lan
2021-07-07 15:46 ` [Resend RFC PATCH V4 13/13] x86/HV: Not set memory decrypted/encrypted during kexec alloc/free page in IVM Tianyu Lan
2021-07-07 16:14 ` Dave Hansen
2021-07-08 13:54 ` Tianyu Lan
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