[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [PATCH 13/13] HV/Storvsc: Add Isolation VM support for storvsc driver
- To: Tianyu Lan <ltykernel@xxxxxxxxx>
- From: Joerg Roedel <joro@xxxxxxxxxx>
- Date: Mon, 2 Aug 2021 15:20:03 +0200
- Cc: kys@xxxxxxxxxxxxx, haiyangz@xxxxxxxxxxxxx, sthemmin@xxxxxxxxxxxxx, wei.liu@xxxxxxxxxx, decui@xxxxxxxxxxxxx, tglx@xxxxxxxxxxxxx, mingo@xxxxxxxxxx, bp@xxxxxxxxx, x86@xxxxxxxxxx, hpa@xxxxxxxxx, dave.hansen@xxxxxxxxxxxxxxx, luto@xxxxxxxxxx, peterz@xxxxxxxxxxxxx, konrad.wilk@xxxxxxxxxx, boris.ostrovsky@xxxxxxxxxx, jgross@xxxxxxxx, sstabellini@xxxxxxxxxx, will@xxxxxxxxxx, davem@xxxxxxxxxxxxx, kuba@xxxxxxxxxx, jejb@xxxxxxxxxxxxx, martin.petersen@xxxxxxxxxx, arnd@xxxxxxxx, hch@xxxxxx, m.szyprowski@xxxxxxxxxxx, robin.murphy@xxxxxxx, thomas.lendacky@xxxxxxx, brijesh.singh@xxxxxxx, ardb@xxxxxxxxxx, Tianyu.Lan@xxxxxxxxxxxxx, rientjes@xxxxxxxxxx, martin.b.radev@xxxxxxxxx, akpm@xxxxxxxxxxxxxxxxxxxx, rppt@xxxxxxxxxx, kirill.shutemov@xxxxxxxxxxxxxxx, aneesh.kumar@xxxxxxxxxxxxx, krish.sadhukhan@xxxxxxxxxx, saravanand@xxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, pgonda@xxxxxxxxxx, david@xxxxxxxxxx, keescook@xxxxxxxxxxxx, hannes@xxxxxxxxxxx, sfr@xxxxxxxxxxxxxxxx, michael.h.kelley@xxxxxxxxxxxxx, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, linux-arch@xxxxxxxxxxxxxxx, linux-hyperv@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, linux-scsi@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, vkuznets@xxxxxxxxxx, anparri@xxxxxxxxxxxxx
- Delivery-date: Mon, 02 Aug 2021 13:20:27 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Wed, Jul 28, 2021 at 10:52:28AM -0400, Tianyu Lan wrote:
> In Isolation VM, all shared memory with host needs to mark visible
> to host via hvcall. vmbus_establish_gpadl() has already done it for
> storvsc rx/tx ring buffer. The page buffer used by vmbus_sendpacket_
> mpb_desc() still need to handle. Use DMA API to map/umap these
> memory during sending/receiving packet and Hyper-V DMA ops callback
> will use swiotlb function to allocate bounce buffer and copy data
> from/to bounce buffer.
I am wondering why you dont't use DMA-API unconditionally? It provides
enough abstraction to do the right thing for isolated and legacy VMs.
Regards,
Joerg
|
