Re: [Xen-devel] [PATCH v2] interrupts: allow guest to set and clear MSI-X mask bit

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 13.08.13 at 19:37, Joby Poriyath <joby.poriyath@xxxxxxxxxx> wrote:
> Guest was allowed to modify the MSI-X control bit to reduce the load on 
> dom0.
> Otherwise this would have to be emulated by qemu-dm. I found a paper 
> which explains this in detail (http://zhenxiao.com/read/SR-IOV.pdf).

Without going through it in full, I wasn't able to find any mention
of the guest being granted to the MSI-X mask bit (searching for
all of "MSI-X", "mask", and "bit" individually). Which would anyway
be more consistent with MSI, where the mask bit in PCI config
space, and hence the guest can't be allowed direct access in any
case.

Jan


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel