leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

drm/i915/pxp: Create the arbitrary session after boot

Browse Source 
Create the arbitrary session, with the fixed session id 0xf, after
system boot, for the case that application allocates the protected
buffer without establishing any protection session. Because the
hardware requires at least one alive session for protected buffer
creation. This arbitrary session will need to be re-created after
teardown or power event because hardware encryption key won't be
valid after such cases.

The session ID is exposed as part of the uapi so it can be used as part
of userspace commands.

v2: use gt->uncore->rpm (Chris)
v3: s/arb_is_in_play/arb_is_valid (Chris), move set-up to the new
    init_hw function
v4: move interface defs to separate header, set arb_is valid to false
    on fini (Rodrigo)
v5: handle async component binding

Signed-off-by: Huang, Sean Z <sean.z.huang@intel.com>
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210924191452.1539378-8-alan.previn.teres.alexis@intel.com
This commit is contained in:
Huang, Sean Z
2021-09-24 12:14:42 -07:00
committed by Rodrigo Vivi
parent e0111ce0f5
commit cbbd3764b2
10 changed files with 243 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
include/uapi/drm/i915_drm.h
View File

@@ -3038,6 +3038,9 @@ struct drm_i915_gem_create_ext_memory_regions {
__u64 regions;
};
/* ID of the protected content session managed by i915 when PXP is active */
#define I915_PROTECTED_CONTENT_DEFAULT_SESSION 0xf
#if defined(__cplusplus)
}
#endif