[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Xen-devel] Pinning a DomU Guest data page from Hypervisor
On Wed, Aug 03, 2011 at 07:26:47PM +0530, veerasena reddy wrote:
> I have a DomU Guest (PVHVM) running a customized PV network driver. To
> increase the network IO performance I would like to try providing the
> address of the Guest pages directly to the network device without
> involving dom0.
Hmm.. can't you use IOMMU PCI passthru?
> For this i need to convert the GMFN of the page to MFN in hypervisor and
> pin the page. I could map the device BAR to hypervisor and write the Guest
> addresses to device. But I couldn't get how to Pin the Guest pages.
> I looked into code "xen/arch/x86/mm.c", do_mmuext_op() which was
> invoking xsm_memory_pin_page() only for L1 to L4 page table type pages.
> Can i use the same API to pin data pages?
> Could anybody please advice how can I pin a Guest data page from
> hypervisor. Any APIs or sequence of operations to be done on MFN of the
> guest page?
> Thanks & Regards,
> Xen-devel mailing list
Xen-devel mailing list