linux-kernel - [PATCH] tools/sched_ext: Provide consistent access to scx flags

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <20250224224959.264808-1-arighi@nvidia.com>
Date: Mon, 24 Feb 2025 23:49:59 +0100
From: Andrea Righi <arighi@...dia.com>
To: Tejun Heo <tj@...nel.org>,
	David Vernet <void@...ifault.com>,
	Changwoo Min <changwoo@...lia.com>
Cc: linux-kernel@...r.kernel.org
Subject: [PATCH] tools/sched_ext: Provide consistent access to scx flags

Make all the SCX_OPS_* and SCX_PICK_IDLE_* flags available to the
user-space part of the schedulers via the compat interface.

This allows schedulers / selftests to set all the ops flags in
user-space, rather than having them split between BPF and user-space.

Signed-off-by: Andrea Righi <arighi@...dia.com>
---
 tools/sched_ext/include/scx/compat.h | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/tools/sched_ext/include/scx/compat.h b/tools/sched_ext/include/scx/compat.h
index 03e06bd15c738..35c67c5174ac0 100644
--- a/tools/sched_ext/include/scx/compat.h
+++ b/tools/sched_ext/include/scx/compat.h
@@ -106,14 +106,20 @@ static inline bool __COMPAT_struct_has_field(const char *type, const char *field
 	return false;
 }
 
-#define SCX_OPS_SWITCH_PARTIAL							\
-	__COMPAT_ENUM_OR_ZERO("scx_ops_flags", "SCX_OPS_SWITCH_PARTIAL")
+#define SCX_OPS_FLAG(name) __COMPAT_ENUM_OR_ZERO("scx_ops_flags", #name)
 
-#define SCX_OPS_BUILTIN_IDLE_PER_NODE						\
-	__COMPAT_ENUM_OR_ZERO("scx_ops_flags", "SCX_OPS_BUILTIN_IDLE_PER_NODE")
+#define SCX_OPS_KEEP_BUILTIN_IDLE SCX_OPS_FLAG(SCX_OPS_KEEP_BUILTIN_IDLE)
+#define SCX_OPS_ENQ_LAST SCX_OPS_FLAG(SCX_OPS_ENQ_LAST)
+#define SCX_OPS_ENQ_EXITING  SCX_OPS_FLAG(SCX_OPS_ENQ_EXITING)
+#define SCX_OPS_SWITCH_PARTIAL SCX_OPS_FLAG(SCX_OPS_SWITCH_PARTIAL)
+#define SCX_OPS_ENQ_MIGRATION_DISABLED SCX_OPS_FLAG(SCX_OPS_ENQ_MIGRATION_DISABLED)
+#define SCX_OPS_ALLOW_QUEUED_WAKEUP SCX_OPS_FLAG(SCX_OPS_ALLOW_QUEUED_WAKEUP)
+#define SCX_OPS_BUILTIN_IDLE_PER_NODE SCX_OPS_FLAG(SCX_OPS_BUILTIN_IDLE_PER_NODE)
 
-#define SCX_PICK_IDLE_IN_NODE \
-	__COMPAT_ENUM_OR_ZERO("scx_pick_idle_cpu_flags", "SCX_PICK_IDLE_IN_NODE")
+#define SCX_PICK_IDLE_FLAG(name) __COMPAT_ENUM_OR_ZERO("scx_pick_idle_cpu_flags", #name)
+
+#define SCX_PICK_IDLE_CORE SCX_PICK_IDLE_FLAG(SCX_PICK_IDLE_CORE)
+#define SCX_PICK_IDLE_IN_NODE SCX_PICK_IDLE_FLAG(SCX_PICK_IDLE_IN_NODE)
 
 static inline long scx_hotplug_seq(void)
 {
-- 
2.48.1