Messages in this thread |  | | Subject | Re: [PATCH v3] xen/privcmd: add IOCTL_PRIVCMD_MMAP_RESOURCE | From | Boris Ostrovsky <> | Date | Mon, 9 Apr 2018 15:18:38 -0400 |
| |
On 04/09/2018 12:36 PM, Boris Ostrovsky wrote: > On 04/09/2018 05:36 AM, Paul Durrant wrote: >> My recent Xen patch series introduces a new HYPERVISOR_memory_op to >> support direct priv-mapping of certain guest resources (such as ioreq >> pages, used by emulators) by a tools domain, rather than having to access >> such resources via the guest P2M. >> >> This patch adds the necessary infrastructure to the privcmd driver and >> Xen MMU code to support direct resource mapping. >> >> NOTE: The adjustment in the MMU code is partially cosmetic. Xen will now >> allow a PV tools domain to map guest pages either by GFN or MFN, thus >> the term 'mfn' has been swapped for 'pfn' in the lower layers of the >> remap code. >> >> Signed-off-by: Paul Durrant <paul.durrant@citrix.com> > Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> > > I think this will have to wait until 4.18 though, it's somewhat late for > current merge window right now.
Warns on 32-bit ARM build:
CC drivers/xen/privcmd.o In file included from /data/upstream/linux-xen/include/linux/kernel.h:14:0, from /data/upstream/linux-xen/drivers/xen/privcmd.c:11: /data/upstream/linux-xen/drivers/xen/privcmd.c: In function ‘privcmd_ioctl_mmap_resource’: /data/upstream/linux-xen/drivers/xen/privcmd.c:788:33: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] pr_info("pfn[%u] = %p\n", i, (void *)pfns[i]); ^ /data/upstream/linux-xen/include/linux/printk.h:308:34: note: in definition of macro ‘pr_info’ printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) ^~~~~~~~~~~ AR drivers/xen/xen-privcmd.o
-boris
|  |