Re: [virtio-comment] Re: [virtio-dev] Re: [PATCH 0/5] virtio: introduce SUSPEND bit and vq state

["Zhu, Lingshan" <lingshan.zhu@intel.com>]

On 10/12/2023 10:38 PM, Michael S. Tsirkin wrote:
> On Thu, Oct 12, 2023 at 06:49:51PM +0800, Zhu, Lingshan wrote:
> > For PCI based configuration, like MSI, we need to fetch from config space
> > anyway.
> > For others like dirty page, we can store the bitmap in host memory, and use
> > PASID for isolation.
> Ok. So how a about a simple interface along the lines of
> u64 cmd_address
> u8 ready_flags:1
>
> For this kind of stuff?
Yes, something like this, log dirty pages in host memory.
The is the draft, not finished yet.

Â84 +\begin{lstlisting}
Â85 +struct virtio_pci_dity_page_track {
Â86 +ÂÂÂÂÂÂÂ u8 enable;ÂÂÂÂÂÂÂÂÂÂÂÂÂÂ /* Read-Write */
Â87 +ÂÂÂÂÂÂÂ u8 gra_power;ÂÂÂÂÂÂÂÂÂÂÂ /* Read-Write */
Â88 +ÂÂÂÂÂÂÂ u8 reserved[2];
Â89 +ÂÂÂÂÂÂÂ le32 {
Â90 +ÂÂÂÂÂÂÂÂÂÂÂ pasid: 20;ÂÂÂÂÂÂÂÂÂÂ /* Read-Write */
Â91 +ÂÂÂÂÂÂÂÂÂÂÂ reserved: 12;
Â92 +ÂÂÂÂÂÂÂ };
Â93 +ÂÂÂÂÂÂÂ le64 bitmap_addr;ÂÂÂÂÂÂÂ /* Read-Write */
Â94 +ÂÂÂÂÂÂÂ le64 bitmap_length;ÂÂÂÂÂ /* Read-Write */
Â95 +};
Â96 +\end{lstlisting}


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