Re: [PATCH] hv_sock: fix ARM64 support

[Stefano Garzarella]

No version number in the subject?

Please next time follow 
https://docs.kernel.org/process/submitting-patches.html#subject-line

  Common tags might include a version descriptor if the multiple 
  versions of the patch have been sent out in response to comments 
  (i.e., “v1, v2, v3”), or “RFC” to indicate a request for comments.

On Tue, Apr 28, 2026 at 08:53:39AM -0400, Hamza Mahfooz wrote:
> VMBUS ring buffers must be page aligned. Therefore, the current value of
> 24K presents a challenge on ARM64 kernels (with 64K pages). So, use
> VMBUS_RING_SIZE() to ensure they are always aligned and large enough to
> hold all of the relevant data.
>
> Cc: stable@xxxxxxxxxxxxxxx
> Fixes: 77ffe33363c0 ("hv_sock: use HV_HYP_PAGE_SIZE for Hyper-V communication")
> Tested-by: Dexuan Cui <decui@xxxxxxxxxxxxx>
> Reviewed-by: Dexuan Cui <decui@xxxxxxxxxxxxx>
> Signed-off-by: Hamza Mahfooz <hamzamahfooz@xxxxxxxxxxxxxxxxxxx>
> ---
> net/vmw_vsock/hyperv_transport.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)

Acked-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>

> diff --git a/net/vmw_vsock/hyperv_transport.c b/net/vmw_vsock/hyperv_transport.c
> index 069386a74557..40f09b23efa3 100644
> --- a/net/vmw_vsock/hyperv_transport.c
> +++ b/net/vmw_vsock/hyperv_transport.c
> @@ -375,10 +375,10 @@ static void hvs_open_connection(struct vmbus_channel *chan)
> 	} else {
> 		sndbuf = max_t(int, sk->sk_sndbuf, RINGBUFFER_HVS_SND_SIZE);
> 		sndbuf = min_t(int, sndbuf, RINGBUFFER_HVS_MAX_SIZE);
> -		sndbuf = ALIGN(sndbuf, HV_HYP_PAGE_SIZE);
> +		sndbuf = VMBUS_RING_SIZE(sndbuf);
> 		rcvbuf = max_t(int, sk->sk_rcvbuf, RINGBUFFER_HVS_RCV_SIZE);
> 		rcvbuf = min_t(int, rcvbuf, RINGBUFFER_HVS_MAX_SIZE);
> -		rcvbuf = ALIGN(rcvbuf, HV_HYP_PAGE_SIZE);
> +		rcvbuf = VMBUS_RING_SIZE(rcvbuf);
> 	}
>
> 	chan->max_pkt_size = HVS_MAX_PKT_SIZE;
> --
> 2.54.0