diff options
| author | Tianyu Lan <Tianyu.Lan@microsoft.com> | 2021-10-25 08:21:14 -0400 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2021-10-28 11:26:36 +0000 |
| commit | 9a8797722e4239242d0cb4cc4baa805df6ac979e (patch) | |
| tree | 8cb351e1b1c93971e0eb1910ca9f9ed34151e16e /drivers/hv/channel.c | |
| parent | f2f136c05fb6093818a3b3fefcba46231ac66a62 (diff) | |
| download | linux-9a8797722e4239242d0cb4cc4baa805df6ac979e.tar.bz2 | |
Drivers: hv: vmbus: Initialize VMbus ring buffer for Isolation VM
VMbus ring buffer are shared with host and it's need to
be accessed via extra address space of Isolation VM with
AMD SNP support. This patch is to map the ring buffer
address in extra address space via vmap_pfn(). Hyperv set
memory host visibility hvcall smears data in the ring buffer
and so reset the ring buffer memory to zero after mapping.
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Link: https://lore.kernel.org/r/20211025122116.264793-10-ltykernel@gmail.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'drivers/hv/channel.c')
| -rw-r--r-- | drivers/hv/channel.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c index b37ff4a39224..dc5c35210c16 100644 --- a/drivers/hv/channel.c +++ b/drivers/hv/channel.c @@ -683,15 +683,6 @@ static int __vmbus_open(struct vmbus_channel *newchannel, if (!newchannel->max_pkt_size) newchannel->max_pkt_size = VMBUS_DEFAULT_MAX_PKT_SIZE; - err = hv_ringbuffer_init(&newchannel->outbound, page, send_pages, 0); - if (err) - goto error_clean_ring; - - err = hv_ringbuffer_init(&newchannel->inbound, &page[send_pages], - recv_pages, newchannel->max_pkt_size); - if (err) - goto error_clean_ring; - /* Establish the gpadl for the ring buffer */ newchannel->ringbuffer_gpadlhandle.gpadl_handle = 0; @@ -703,6 +694,16 @@ static int __vmbus_open(struct vmbus_channel *newchannel, if (err) goto error_clean_ring; + err = hv_ringbuffer_init(&newchannel->outbound, + page, send_pages, 0); + if (err) + goto error_free_gpadl; + + err = hv_ringbuffer_init(&newchannel->inbound, &page[send_pages], + recv_pages, newchannel->max_pkt_size); + if (err) + goto error_free_gpadl; + /* Create and init the channel open message */ open_info = kzalloc(sizeof(*open_info) + sizeof(struct vmbus_channel_open_channel), |