Messages in this thread | | | From | Haiyang Zhang <> | Subject | RE: [PATCH V5 12/12] net: netvsc: Add Isolation VM support for netvsc driver | Date | Tue, 14 Sep 2021 15:49:29 +0000 |
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> -----Original Message----- > From: Tianyu Lan <ltykernel@gmail.com> > Sent: Tuesday, September 14, 2021 9:39 AM > To: KY Srinivasan <kys@microsoft.com>; Haiyang Zhang > <haiyangz@microsoft.com>; Stephen Hemminger <sthemmin@microsoft.com>; > wei.liu@kernel.org; Dexuan Cui <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; gregkh@linuxfoundation.org; arnd@arndb.de; > hch@lst.de; m.szyprowski@samsung.com; robin.murphy@arm.com; > brijesh.singh@amd.com; Tianyu Lan <Tianyu.Lan@microsoft.com>; > thomas.lendacky@amd.com; pgonda@google.com; akpm@linux-foundation.org; > kirill.shutemov@linux.intel.com; rppt@kernel.org; sfr@canb.auug.org.au; > aneesh.kumar@linux.ibm.com; saravanand@fb.com; > krish.sadhukhan@oracle.com; xen-devel@lists.xenproject.org; > tj@kernel.org; rientjes@google.com; Michael Kelley > <mikelley@microsoft.com> > Cc: 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 > <vkuznets@redhat.com>; parri.andrea@gmail.com; dave.hansen@intel.com > Subject: [PATCH V5 12/12] net: netvsc: Add Isolation VM support for > netvsc driver > > From: Tianyu Lan <Tianyu.Lan@microsoft.com> > > 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@microsoft.com> > --- > 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@microsoft.com>
Thank you!
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