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/hv | |
| parent | 743b237c3a7b0f5b44aa704aae8a1058877b6322 (diff) | |
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/hv')
| -rw-r--r-- | drivers/hv/hv_common.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/hv/hv_common.c b/drivers/hv/hv_common.c index 7be173a99f27..3c5cb1f70319 100644 --- a/drivers/hv/hv_common.c +++ b/drivers/hv/hv_common.c @@ -295,3 +295,14 @@ u64 __weak hv_ghcb_hypercall(u64 control, void *input, void *output, u32 input_s return HV_STATUS_INVALID_PARAMETER; } EXPORT_SYMBOL_GPL(hv_ghcb_hypercall); + +void __weak *hv_map_memory(void *addr, unsigned long size) +{ + return NULL; +} +EXPORT_SYMBOL_GPL(hv_map_memory); + +void __weak hv_unmap_memory(void *addr) +{ +} +EXPORT_SYMBOL_GPL(hv_unmap_memory); |