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From: guoren@kernel.org
To: arnd@arndb.de
Cc: linux-kernel@vger.kernel.org, linux-csky@vger.kernel.org,
	Guo Ren <guoren@linux.alibaba.com>
Subject: [PATCH 08/11] csky: Enable LOCKDEP_SUPPORT
Date: Fri,  3 Apr 2020 12:41:47 +0800	[thread overview]
Message-ID: <20200403044150.20562-8-guoren@kernel.org> (raw)
In-Reply-To: <20200403044150.20562-1-guoren@kernel.org>

From: Guo Ren <guoren@linux.alibaba.com>

Lockdep is needed by proving the spinlocks and rwlocks. Currently,
we only put trace_hardirqs_on/off with csky_irq and
ret_from_exception.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
---
 arch/csky/Kconfig        |  3 +++
 arch/csky/kernel/entry.S | 11 +++++++++++
 2 files changed, 14 insertions(+)

diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig
index a75b8e1fef1d..998188f44fd7 100644
--- a/arch/csky/Kconfig
+++ b/arch/csky/Kconfig
@@ -69,6 +69,9 @@ config CSKY
 	select PCI_SYSCALL if PCI
 	select PCI_MSI if PCI
 
+config LOCKDEP_SUPPORT
+	def_bool y
+
 config CPU_HAS_CACHEV2
 	bool
 
diff --git a/arch/csky/kernel/entry.S b/arch/csky/kernel/entry.S
index 0bde1d9fd277..8b040a1b11d0 100644
--- a/arch/csky/kernel/entry.S
+++ b/arch/csky/kernel/entry.S
@@ -225,6 +225,13 @@ ret_from_exception:
 	cmpnei	r12, 0
 	bt	exit_work
 1:
+#ifdef CONFIG_TRACE_IRQFLAGS
+	ld	r10, (sp, LSAVE_PSR)
+	btsti	r10, 6
+	bf	2f
+	jbsr	trace_hardirqs_on
+2:
+#endif
 	RESTORE_ALL
 
 exit_work:
@@ -280,6 +287,10 @@ ENTRY(csky_irq)
 	zero_fp
 	psrset	ee
 
+#ifdef CONFIG_TRACE_IRQFLAGS
+	jbsr	trace_hardirqs_off
+#endif
+
 #ifdef CONFIG_PREEMPTION
 	mov	r9, sp			/* Get current stack  pointer */
 	bmaski	r10, THREAD_SHIFT
-- 
2.17.0


  parent reply	other threads:[~2020-04-03  4:42 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-03  4:41 [PATCH 01/11] csky: Fixup init_fpu compile warning with __init guoren
2020-04-03  4:41 ` [PATCH 02/11] csky: Implement ptrace regs and stack API guoren
2020-04-03  4:41 ` [PATCH 03/11] csky: Add support for restartable sequence guoren
2020-04-03  4:41 ` [PATCH 04/11] csky: Implement ftrace with regs guoren
2020-04-03  4:41 ` [PATCH 05/11] csky/ftrace: Fixup ftrace_modify_code deadlock without CPU_HAS_ICACHE_INS guoren
2020-04-03  4:41 ` [PATCH 06/11] csky: Fixup get wrong psr value from phyical reg guoren
2020-04-03  4:41 ` [PATCH 07/11] csky: Enable the gcov function guoren
2020-04-03  4:41 ` guoren [this message]
2020-04-03  4:41 ` [PATCH 09/11] csky: Add kprobes supported guoren
2020-04-03  4:41 ` [PATCH 10/11] csky: Add uprobes support guoren
2020-04-03  4:41 ` [PATCH 11/11] csky: Fixup cpu speculative execution to IO area guoren

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