diff options
Diffstat (limited to 'include/xen/interface/xen.h')
| -rw-r--r-- | include/xen/interface/xen.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/include/xen/interface/xen.h b/include/xen/interface/xen.h index 819a0331cda9..2befa3e2f1bc 100644 --- a/include/xen/interface/xen.h +++ b/include/xen/interface/xen.h | |||
| @@ -114,9 +114,14 @@ | |||
| 114 | * ptr[:2] -- Machine address within the frame whose mapping to modify. | 114 | * ptr[:2] -- Machine address within the frame whose mapping to modify. |
| 115 | * The frame must belong to the FD, if one is specified. | 115 | * The frame must belong to the FD, if one is specified. |
| 116 | * val -- Value to write into the mapping entry. | 116 | * val -- Value to write into the mapping entry. |
| 117 | * | ||
| 118 | * ptr[1:0] == MMU_PT_UPDATE_PRESERVE_AD: | ||
| 119 | * As MMU_NORMAL_PT_UPDATE above, but A/D bits currently in the PTE are ORed | ||
| 120 | * with those in @val. | ||
| 117 | */ | 121 | */ |
| 118 | #define MMU_NORMAL_PT_UPDATE 0 /* checked '*ptr = val'. ptr is MA. */ | 122 | #define MMU_NORMAL_PT_UPDATE 0 /* checked '*ptr = val'. ptr is MA. */ |
| 119 | #define MMU_MACHPHYS_UPDATE 1 /* ptr = MA of frame to modify entry for */ | 123 | #define MMU_MACHPHYS_UPDATE 1 /* ptr = MA of frame to modify entry for */ |
| 124 | #define MMU_PT_UPDATE_PRESERVE_AD 2 /* atomically: *ptr = val | (*ptr&(A|D)) */ | ||
| 120 | 125 | ||
| 121 | /* | 126 | /* |
| 122 | * MMU EXTENDED OPERATIONS | 127 | * MMU EXTENDED OPERATIONS |