From: "tip-bot2 for Josh Poimboeuf" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Josh Poimboeuf <jpoimboe@kernel.org>,
"Peter Zijlstra (Intel)" <peterz@infradead.org>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: [tip: objtool/core] context_tracking: Fix KCSAN noinstr violation
Date: Fri, 14 Apr 2023 14:47:56 -0000 [thread overview]
Message-ID: <168148367618.404.8910517787032335784.tip-bot2@tip-bot2> (raw)
In-Reply-To: <dc93f45abdec90c171108b4b590b7fff5790963c.1681320026.git.jpoimboe@kernel.org>
The following commit has been merged into the objtool/core branch of tip:
Commit-ID: e8deb00c0c4808654d1bf96a8f79cf1deb59b631
Gitweb: https://git.kernel.org/tip/e8deb00c0c4808654d1bf96a8f79cf1deb59b631
Author: Josh Poimboeuf <jpoimboe@kernel.org>
AuthorDate: Wed, 12 Apr 2023 10:24:06 -07:00
Committer: Peter Zijlstra <peterz@infradead.org>
CommitterDate: Fri, 14 Apr 2023 16:08:27 +02:00
context_tracking: Fix KCSAN noinstr violation
With KCSAN enabled, even empty inline stubs can be out-of-lined.
Force the context_tracking_guest_exit() stub inline.
Fixes the following warnings:
vmlinux.o: warning: objtool: vmx_vcpu_enter_exit+0x1be: call to context_tracking_guest_exit() leaves .noinstr.text section
vmlinux.o: warning: objtool: svm_vcpu_enter_exit+0x85: call to context_tracking_guest_exit() leaves .noinstr.text section
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/r/dc93f45abdec90c171108b4b590b7fff5790963c.1681320026.git.jpoimboe@kernel.org
---
include/linux/context_tracking.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/context_tracking.h b/include/linux/context_tracking.h
index d4afa85..5ae3abd 100644
--- a/include/linux/context_tracking.h
+++ b/include/linux/context_tracking.h
@@ -97,7 +97,7 @@ static inline int exception_enter(void) { return 0; }
static inline void exception_exit(enum ctx_state prev_ctx) { }
static inline int ct_state(void) { return -1; }
static __always_inline bool context_tracking_guest_enter(void) { return false; }
-static inline void context_tracking_guest_exit(void) { }
+static __always_inline void context_tracking_guest_exit(void) { }
#define CT_WARN_ON(cond) do { } while (0)
#endif /* !CONFIG_CONTEXT_TRACKING_USER */
next prev parent reply other threads:[~2023-04-14 14:48 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-12 17:24 [PATCH 0/3] noinstr fixes Josh Poimboeuf
2023-04-12 17:24 ` [PATCH 1/3] context_tracking: Fix KCSAN noinstr violation Josh Poimboeuf
2023-04-13 13:58 ` Frederic Weisbecker
2023-04-14 14:47 ` tip-bot2 for Josh Poimboeuf [this message]
2023-04-12 17:24 ` [PATCH 2/3] sched: " Josh Poimboeuf
2023-04-14 14:47 ` [tip: objtool/core] " tip-bot2 for Josh Poimboeuf
2023-04-12 17:24 ` [PATCH 3/3] lkdtm/stackleak: Fix " Josh Poimboeuf
2023-04-14 14:47 ` [tip: objtool/core] " tip-bot2 for Josh Poimboeuf
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