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Re: [Qemu-devel] vhost-user: VHOST_SET_MEM_TABLE, VHOST_SET_VRING_CALL n
From: |
Linhaifeng |
Subject: |
Re: [Qemu-devel] vhost-user: VHOST_SET_MEM_TABLE, VHOST_SET_VRING_CALL need a reply? |
Date: |
Wed, 17 Sep 2014 17:39:04 +0800 |
User-agent: |
Mozilla/5.0 (Windows NT 6.1; rv:31.0) Gecko/20100101 Thunderbird/31.1.0 |
I think maybe is not need for the backend to wait for response.
There is another way.vhost-user send "VHOST_GET_MEM_TABLE" to qemu then qemu
send VHOST_SET_MEM_TABLE to update the regions of vhost-user.same as other
command.
If qemu could response the request of the vhost-user.the vhost-user could
update date at anytime.
I think it's very useful for Commercialization.
On 2014/9/17 16:38, Michael S. Tsirkin wrote:
> Reply-To:
>
> Thinking about the vhost-user protocol, VHOST_SET_MEM_TABLE
> is used to update the memory mappings.
>
> So shouldn't we want for response?
> Otherwise e.g. guest can start using the memory
> that vhost-user can't access.
>
> Similarly, with an IOMMU vhost-user might access memory it shouldn't.
>
> VHOST_SET_VRING_CALL is used for MSI-X masking.
> Again, after vector is masted by switching the call fd,
> backend shouldn't assert the old one.
>
> Thoughts?
>
>
- [Qemu-devel] vhost-user: VHOST_SET_MEM_TABLE, VHOST_SET_VRING_CALL need a reply?, Michael S. Tsirkin, 2014/09/17
- Re: [Qemu-devel] vhost-user: VHOST_SET_MEM_TABLE, VHOST_SET_VRING_CALL need a reply?,
Linhaifeng <=
- Re: [Qemu-devel] vhost-user: VHOST_SET_MEM_TABLE, VHOST_SET_VRING_CALL need a reply?, Michael S. Tsirkin, 2014/09/17
- Re: [Qemu-devel] vhost-user: VHOST_SET_MEM_TABLE, VHOST_SET_VRING_CALL need a reply?, Linhaifeng, 2014/09/17
- Re: [Qemu-devel] vhost-user: VHOST_SET_MEM_TABLE, VHOST_SET_VRING_CALL need a reply?, Michael S. Tsirkin, 2014/09/18
- Re: [Qemu-devel] vhost-user: VHOST_SET_MEM_TABLE, VHOST_SET_VRING_CALL need a reply?, Linhaifeng, 2014/09/18
- Re: [Qemu-devel] vhost-user: VHOST_SET_MEM_TABLE, VHOST_SET_VRING_CALL need a reply?, Michael S. Tsirkin, 2014/09/18
- Re: [Qemu-devel] vhost-user: VHOST_SET_MEM_TABLE, VHOST_SET_VRING_CALL need a reply?, Linhaifeng, 2014/09/17
- Re: [Qemu-devel] vhost-user: VHOST_SET_MEM_TABLE, VHOST_SET_VRING_CALL need a reply?, Michael S. Tsirkin, 2014/09/18