> -----Original Message----- > From: Tianyu Lan <ltykernel@xxxxxxxxx> > Sent: Monday, December 13, 2021 2:14 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; dave.hansen@xxxxxxxxxxxxxxx; > x86@xxxxxxxxxx; hpa@xxxxxxxxx; davem@xxxxxxxxxxxxx; kuba@xxxxxxxxxx; jejb@xxxxxxxxxxxxx; > martin.petersen@xxxxxxxxxx; arnd@xxxxxxxx; hch@xxxxxxxxxxxxx; m.szyprowski@xxxxxxxxxxx; > robin.murphy@xxxxxxx; thomas.lendacky@xxxxxxx; Tianyu Lan <Tianyu.Lan@xxxxxxxxxxxxx>; > Michael Kelley (LINUX) <mikelley@xxxxxxxxxxxxx> > Cc: iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx; linux-arch@xxxxxxxxxxxxxxx; linux- > hyperv@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; linux-scsi@xxxxxxxxxxxxxxx; > netdev@xxxxxxxxxxxxxxx; vkuznets <vkuznets@xxxxxxxxxx>; brijesh.singh@xxxxxxx; > konrad.wilk@xxxxxxxxxx; hch@xxxxxx; joro@xxxxxxxxxx; parri.andrea@xxxxxxxxx; > dave.hansen@xxxxxxxxx > Subject: [PATCH V7 5/5] 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. > > rx/tx ring buffer is allocated via vzalloc() and they need to be > mapped into unencrypted address space(above vTOM) before sharing > with host and accessing. Add hv_map/unmap_memory() to map/umap rx > /tx ring buffer. > > Signed-off-by: Tianyu Lan <Tianyu.Lan@xxxxxxxxxxxxx> > --- > Change since v3: > * Replace HV_HYP_PAGE_SIZE with PAGE_SIZE and virt_to_hvpfn() > with vmalloc_to_pfn() in the hv_map_memory() > > Change since v2: > * Add hv_map/unmap_memory() to map/umap rx/tx ring buffer. > --- > arch/x86/hyperv/ivm.c | 28 ++++++ > drivers/hv/hv_common.c | 11 +++ > drivers/net/hyperv/hyperv_net.h | 5 ++ > drivers/net/hyperv/netvsc.c | 136 +++++++++++++++++++++++++++++- > drivers/net/hyperv/netvsc_drv.c | 1 + > drivers/net/hyperv/rndis_filter.c | 2 + > include/asm-generic/mshyperv.h | 2 + > include/linux/hyperv.h | 5 ++ > 8 files changed, 187 insertions(+), 3 deletions(-) > Reviewed-by: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
