[PATCH 3/4] device_cgroup: Export __devcgroup_check_permission

Kasiviswanathan, Harish Harish.Kasiviswanathan at amd.com
Wed May 1 14:59:27 UTC 2019

For AMD compute (amdkfd) driver.

All AMD compute devices are exported via single device node /dev/kfd. As
a result devices cannot be controlled individually using device cgroup.

AMD compute devices will rely on its graphics counterpart that exposes
/dev/dri/renderN node for each device. For each task (based on its
cgroup), KFD driver will check if /dev/dri/renderN node is accessible
before exposing it.

Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan at amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling at amd.com>
 security/device_cgroup.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/security/device_cgroup.c b/security/device_cgroup.c
index cd97929fac66..e3a9ad5db5a0 100644
--- a/security/device_cgroup.c
+++ b/security/device_cgroup.c
@@ -824,3 +824,4 @@ int __devcgroup_check_permission(short type, u32 major, u32 minor,
 	return 0;

More information about the amd-gfx mailing list