Re: [PATCH v2 4/6] xen_pvdev: Do not assume Dom0 when creating a directory

[David Woodhouse <dwmw2@xxxxxxxxxxxxx>]

On Wed, 2023-11-22 at 14:29 -0800, Stefano Stabellini wrote:
> On Wed, 22 Nov 2023, Paul Durrant wrote:
> > On 21/11/2023 22:10, Volodymyr Babchuk wrote:
> > > From: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
> > > 
> > > Instead of forcing the owner to domid 0, use XS_PRESERVE_OWNER to
> > > inherit the owner of the directory.
> > 
> > Ah... so that's why the previous patch is there.
> > 
> > This is not the right way to fix it. The QEMU Xen support is *assuming* that
> > QEMU is either running in, or emulating, dom0. In the emulation case this is
> > probably fine, but the 'real Xen' case it should be using the correct domid
> > for node creation. I guess this could either be supplied on the command line
> > or discerned by reading the local domain 'domid' node.
> 
> yes, it should be passed as command line option to QEMU

I'm not sure I like the idea of a command line option for something
which QEMU could discover for itself.

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