diff options
author | Tianyu Lan <Tianyu.Lan@microsoft.com> | 2021-12-13 02:14:06 -0500 |
---|---|---|
committer | Wei Liu <wei.liu@kernel.org> | 2021-12-20 18:01:09 +0000 |
commit | 846da38de0e8224f2f94b885125cf1fd2d7b0d39 (patch) | |
tree | aba66bfd4d591939ca8ad0b80830c5e18b9e46a6 /drivers/net/hyperv/netvsc_drv.c | |
parent | scsi: storvsc: Add Isolation VM support for storvsc driver (diff) | |
download | linux-dev-846da38de0e8224f2f94b885125cf1fd2d7b0d39.tar.xz linux-dev-846da38de0e8224f2f94b885125cf1fd2d7b0d39.zip |
net: netvsc: Add Isolation VM support for netvsc driver
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@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/20211213071407.314309-6-ltykernel@gmail.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'drivers/net/hyperv/netvsc_drv.c')
-rw-r--r-- | drivers/net/hyperv/netvsc_drv.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/net/hyperv/netvsc_drv.c b/drivers/net/hyperv/netvsc_drv.c index 7e66ae1d2a59..17958533bf30 100644 --- a/drivers/net/hyperv/netvsc_drv.c +++ b/drivers/net/hyperv/netvsc_drv.c @@ -2512,6 +2512,7 @@ static int netvsc_probe(struct hv_device *dev, net->netdev_ops = &device_ops; net->ethtool_ops = ðtool_ops; SET_NETDEV_DEV(net, &dev->device); + dma_set_min_align_mask(&dev->device, HV_HYP_PAGE_SIZE - 1); /* We always need headroom for rndis header */ net->needed_headroom = RNDIS_AND_PPI_SIZE; |