diff options
Diffstat (limited to 'src/video_out/libdha/kernelhelper/README')
| -rw-r--r-- | src/video_out/libdha/kernelhelper/README | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/src/video_out/libdha/kernelhelper/README b/src/video_out/libdha/kernelhelper/README index cb5964cb8..98a7923b3 100644 --- a/src/video_out/libdha/kernelhelper/README +++ b/src/video_out/libdha/kernelhelper/README @@ -1,7 +1,7 @@ dhahelper is small driver to provide some kernel function into userspace. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ -Main goal why you need to use that it's busmastering. -(Btw, lacking of possibility to implement convertion of +The main reason you need to use dhahelper is for busmastering. +(Btw, lacking of possibility to implement conversion of virtual addresses into physical in userspace caused implementing of so-called DRM drivers for Linux from XFree86 side). @@ -14,21 +14,25 @@ Installation: just type in this directory: make all install -If you have compiled this driver first-time then -type also: -make nodes +The device node /dev/dhahelper will be created. The initial +permissions of this node are restrictive. See below for information +on how to make it available to non-root users. Porting: ~~~~~~~~ This driver was developed only for Linux. -So if someone will port that on other unicies +So if someone will port that on other unices then any patches are gladly accepted. WARNING: ~~~~~~~~ -This driver violates some kernel's security rules. -To keep this driver from anonymous access I suggest -you create new group for mplayerxp and /dev/dhahelper -only. + +This driver violates some kernel security rules. To keep this driver +from anonymous access I suggest you create a new group (e.g. dha) for +/dev/dhahelper and set the permissions to 660 (or ug+rw,o-rw). Then +do one of the following: + +- add trusted users to group dha. +- make trusted applications SGID to dha. Good luck! |