> -----Original Message-----
> From: Tianyu Lan <[email protected]>
> Sent: Monday, December 13, 2021 2:14 AM
> To: KY Srinivasan <[email protected]>; Haiyang Zhang
> <[email protected]>; Stephen
> Hemminger <[email protected]>; [email protected]; Dexuan Cui
> <[email protected]>;
> [email protected]; [email protected]; [email protected];
> [email protected];
> [email protected]; [email protected]; [email protected]; [email protected];
> [email protected];
> [email protected]; [email protected]; [email protected];
> [email protected];
> [email protected]; [email protected]; Tianyu Lan
> <[email protected]>;
> Michael Kelley (LINUX) <[email protected]>
> Cc: [email protected]; [email protected]; linux-
> [email protected]; [email protected];
> [email protected];
> [email protected]; vkuznets <[email protected]>; [email protected];
> [email protected]; [email protected]; [email protected]; [email protected];
> [email protected]
> Subject: [PATCH V7 5/5] net: netvsc: Add Isolation VM support for netvsc
> driver
>
> From: Tianyu Lan <[email protected]>
>
> 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 <[email protected]>
> ---
> 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 <[email protected]>
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