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ANDROID: binder: add support for RT prio inheritance.

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Adds support for SCHED_BATCH/SCHED_FIFO/SCHED_RR
priority inheritance.

Bug: 34461621
Bug: 37293077
Bug: 120446518
Change-Id: I71f356e476be2933713a0ecfa2cc31aa141e2dc6
Signed-off-by: Martijn Coenen <maco@google.com>
[AmitP: Include <uapi/linux/sched/types.h> for struct sched_param]
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
[astrachan: Folded the following changes into this patch:
            69308b3b07dd ("ANDROID: binder: add min sched_policy to node.")
            7a6edeb62d86 ("ANDROID: binder: improve priority inheritance.")
            22b061b17679 ("ANDROID: binder: don't check prio permissions on restore.")
            67cf97141d81 ("ANDROID: binder: Add tracing for binder priority inheritance.")
            fb92c34f7ba3 ("ANDROID: binder: add RT inheritance flag to node.")
            c847b48f8cda ("ANDROID: binder: init desired_prio.sched_policy before use it")]
Signed-off-by: Alistair Strachan <astrachan@google.com>
This commit is contained in:
Martijn Coenen 2017-06-06 17:04:42 -07:00 • committed by Todd Kjos
commit e00eb41c0c
3 changed files with 284 additions and 33 deletions
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49
include/uapi/linux/android/binder.h
View file

@ -38,9 +38,56 @@ enum {
BINDER_TYPE_PTR = B_PACK_CHARS('p', 't', '*', B_TYPE_LARGE),
};
enum {
/**
* enum flat_binder_object_shifts: shift values for flat_binder_object_flags
* @FLAT_BINDER_FLAG_SCHED_POLICY_SHIFT: shift for getting scheduler policy.
*
*/
enum flat_binder_object_shifts {
FLAT_BINDER_FLAG_SCHED_POLICY_SHIFT = 9,
};
/**
* enum flat_binder_object_flags - flags for use in flat_binder_object.flags
*/
enum flat_binder_object_flags {
/**
* @FLAT_BINDER_FLAG_PRIORITY_MASK: bit-mask for min scheduler priority
*
* These bits can be used to set the minimum scheduler priority
* at which transactions into this node should run. Valid values
* in these bits depend on the scheduler policy encoded in
* @FLAT_BINDER_FLAG_SCHED_POLICY_MASK.
*
* For SCHED_NORMAL/SCHED_BATCH, the valid range is between [-20..19]
* For SCHED_FIFO/SCHED_RR, the value can run between [1..99]
*/
FLAT_BINDER_FLAG_PRIORITY_MASK = 0xff,
/**
* @FLAT_BINDER_FLAG_ACCEPTS_FDS: whether the node accepts fds.
*/
FLAT_BINDER_FLAG_ACCEPTS_FDS = 0x100,
/**
* @FLAT_BINDER_FLAG_SCHED_POLICY_MASK: bit-mask for scheduling policy
*
* These two bits can be used to set the min scheduling policy at which
* transactions on this node should run. These match the UAPI
* scheduler policy values, eg:
* 00b: SCHED_NORMAL
* 01b: SCHED_FIFO
* 10b: SCHED_RR
* 11b: SCHED_BATCH
*/
FLAT_BINDER_FLAG_SCHED_POLICY_MASK =
3U << FLAT_BINDER_FLAG_SCHED_POLICY_SHIFT,
/**
* @FLAT_BINDER_FLAG_INHERIT_RT: whether the node inherits RT policy
*
* Only when set, calls into this node will inherit a real-time
* scheduling policy from the caller (for synchronous transactions).
*/
FLAT_BINDER_FLAG_INHERIT_RT = 0x800,
};
#ifdef BINDER_IPC_32BIT