From 3ad0876554cafa368f574d4d408468510543e9ff Mon Sep 17 00:00:00 2001 From: Paul Durrant Date: Wed, 9 May 2018 14:16:12 +0100 Subject: xen/privcmd: add IOCTL_PRIVCMD_MMAP_RESOURCE 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 Reviewed-by: Boris Ostrovsky Signed-off-by: Juergen Gross --- include/xen/interface/xen.h | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'include/xen/interface/xen.h') diff --git a/include/xen/interface/xen.h b/include/xen/interface/xen.h index 4f4830ef8f93..8bfb242f433e 100644 --- a/include/xen/interface/xen.h +++ b/include/xen/interface/xen.h @@ -265,9 +265,10 @@ * * PAT (bit 7 on) --> PWT (bit 3 on) and clear bit 7. */ -#define MMU_NORMAL_PT_UPDATE 0 /* checked '*ptr = val'. ptr is MA. */ -#define MMU_MACHPHYS_UPDATE 1 /* ptr = MA of frame to modify entry for */ -#define MMU_PT_UPDATE_PRESERVE_AD 2 /* atomically: *ptr = val | (*ptr&(A|D)) */ +#define MMU_NORMAL_PT_UPDATE 0 /* checked '*ptr = val'. ptr is MA. */ +#define MMU_MACHPHYS_UPDATE 1 /* ptr = MA of frame to modify entry for */ +#define MMU_PT_UPDATE_PRESERVE_AD 2 /* atomically: *ptr = val | (*ptr&(A|D)) */ +#define MMU_PT_UPDATE_NO_TRANSLATE 3 /* checked '*ptr = val'. ptr is MA. */ /* * MMU EXTENDED OPERATIONS -- cgit v1.2.3