> -----Original Message-----
> From: Tianyu Lan <[email protected]>
> Sent: Tuesday, September 14, 2021 9:39 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]; [email protected]; [email protected];
> [email protected]; [email protected]; [email protected];
> [email protected]; [email protected]; [email protected];
> [email protected]; Tianyu Lan <[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]; Michael Kelley
> <[email protected]>
> Cc: [email protected]; [email protected]; linux-
> [email protected]; [email protected]; linux-
> [email protected]; [email protected]; vkuznets
> <[email protected]>; [email protected]; [email protected]
> Subject: [PATCH V5 12/12] 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.
>
> 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 <[email protected]>
> ---
> 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 <[email protected]>
Thank you!
