> -----Original Message----- > From: Tianyu Lan <ltykernel@xxxxxxxxx> > Sent: Tuesday, September 14, 2021 9:39 AM > To: KY Srinivasan <kys@xxxxxxxxxxxxx>; Haiyang Zhang > <haiyangz@xxxxxxxxxxxxx>; Stephen Hemminger <sthemmin@xxxxxxxxxxxxx>; > wei.liu@xxxxxxxxxx; Dexuan Cui <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; joro@xxxxxxxxxx; will@xxxxxxxxxx; > davem@xxxxxxxxxxxxx; kuba@xxxxxxxxxx; jejb@xxxxxxxxxxxxx; > martin.petersen@xxxxxxxxxx; gregkh@xxxxxxxxxxxxxxxxxxx; arnd@xxxxxxxx; > hch@xxxxxx; m.szyprowski@xxxxxxxxxxx; robin.murphy@xxxxxxx; > brijesh.singh@xxxxxxx; Tianyu Lan <Tianyu.Lan@xxxxxxxxxxxxx>; > thomas.lendacky@xxxxxxx; pgonda@xxxxxxxxxx; akpm@xxxxxxxxxxxxxxxxxxxx; > kirill.shutemov@xxxxxxxxxxxxxxx; rppt@xxxxxxxxxx; sfr@xxxxxxxxxxxxxxxx; > aneesh.kumar@xxxxxxxxxxxxx; saravanand@xxxxxx; > krish.sadhukhan@xxxxxxxxxx; xen-devel@xxxxxxxxxxxxxxxxxxxx; > tj@xxxxxxxxxx; rientjes@xxxxxxxxxx; Michael Kelley > <mikelley@xxxxxxxxxxxxx> > Cc: iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx; linux-arch@xxxxxxxxxxxxxxx; linux- > hyperv@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; linux- > scsi@xxxxxxxxxxxxxxx; netdev@xxxxxxxxxxxxxxx; vkuznets > <vkuznets@xxxxxxxxxx>; parri.andrea@xxxxxxxxx; dave.hansen@xxxxxxxxx > Subject: [PATCH V5 12/12] net: netvsc: Add Isolation VM support for > netvsc driver > > From: Tianyu Lan <Tianyu.Lan@xxxxxxxxxxxxx> > > In Isolation VM, all shared memory with host needs to mark visible > to host via hvcall. vmbus_establish_gpadl() has already done it for > netvsc rx/tx ring buffer. The page buffer used by vmbus_sendpacket_ > pagebuffer() stills need to be handled. Use DMA API to map/umap > these memory during sending/receiving packet and Hyper-V swiotlb > bounce buffer dma address will be returned. The swiotlb bounce buffer > has been masked to be visible to host during boot up. > > Allocate rx/tx ring buffer via alloc_pages() in Isolation VM and map > these pages via vmap(). After calling vmbus_establish_gpadl() which > marks these pages visible to host, unmap these pages to release the > virtual address mapped with physical address below shared_gpa_boundary > and map them in the extra address space via vmap_pfn(). > > Signed-off-by: Tianyu Lan <Tianyu.Lan@xxxxxxxxxxxxx> > --- > Change since v4: > * Allocate rx/tx ring buffer via alloc_pages() in Isolation VM > * Map pages after calling vmbus_establish_gpadl(). > * set dma_set_min_align_mask for netvsc driver. > > Change since v3: > * Add comment to explain why not to use dma_map_sg() > * Fix some error handle. > --- Reviewed-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx> Thank you!
