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ANDROID: Export the necessary symbols for the implementation of the BPF scheduler.

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It's fortunate that we enabled SCHED_CLASS_EXT in the Android 16-6.12
GKI version. Thank you very much! In the original version, we submitted
several vendor hooks to synchronize the state of the sched_ext scheduler
(to avoid breaking KMI when enabling the CONFIG_SCHED_CLASS_EXT option
in the OEM-GKI version). Fortunately, the current GKI version has agreed
to enable the CONFIG_SCHED_CLASS_EXT option, so directly exporting these
two symbols is a more common approach (some MTK-related code will also
require this).

In the current GKI version, we need to export the following symbols:
register_btf_kfunc_id_set: This function is used to register the BPF
kfunc with the BPF subsystem. The kernel has already exported this
function, and we need to add it to the OPlus symbol table and invoke it
in ddk modules.

__scx_ops_enabled && __scx_switched_all：Status flags for the sched_ext
scheduler

Bug: 417106548
Change-Id: I5161285b4fedf55bc7ee168f948f731160c17d73
Signed-off-by: Yuxing Wang <wangyuxing@oppo.com>
This commit is contained in:
Yuxing Wang
2025-05-12 15:12:16 +08:00
committed by Treehugger Robot
parent de6714dc48
commit 55ac0abda4
1 changed files with 2 additions and 1 deletions
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3
kernel/sched/ext.c
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@@ -860,6 +860,7 @@ static LIST_HEAD(scx_tasks);
static struct kthread_worker *scx_ops_helper;
static DEFINE_MUTEX(scx_ops_enable_mutex);
DEFINE_STATIC_KEY_FALSE(__scx_ops_enabled);
EXPORT_SYMBOL_GPL(__scx_ops_enabled);
DEFINE_STATIC_PERCPU_RWSEM(scx_fork_rwsem);
static atomic_t scx_ops_enable_state_var = ATOMIC_INIT(SCX_OPS_DISABLED);
static int scx_ops_bypass_depth;
@@ -867,7 +868,7 @@ static DEFINE_RAW_SPINLOCK(__scx_ops_bypass_lock);
static bool scx_ops_init_task_enabled;
static bool scx_switching_all;
DEFINE_STATIC_KEY_FALSE(__scx_switched_all);
EXPORT_SYMBOL_GPL(__scx_switched_all);
static struct sched_ext_ops scx_ops;
static bool scx_warned_zero_slice;