linux-kernel - [PATCH 4/7] powerpc/debug: hook to user return notifier infrastructure

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Message-ID: <557E9D5F2DDB7601+20241012035621.1245-6-luming.yu@shingroup.cn>
Date: Sat, 12 Oct 2024 11:56:18 +0800
From: Luming Yu <luming.yu@...ngroup.cn>
To: linuxppc-dev@...ts.ozlabs.org,
	linux-kernel@...r.kernel.org,
	mpe@...erman.id.au,
	npiggin@...il.com,
	christophe.leroy@...roup.eu,
	jialong.yang@...ngroup.cn,
	luming.yu@...il.com
Cc: Luming Yu <luming.yu@...ngroup.cn>
Subject: [PATCH 4/7] powerpc/debug: hook to user return notifier infrastructure

calls back to all registered user return notifier functions.

Signed-off-by: Luming Yu <luming.yu@...ngroup.cn>
---
 arch/powerpc/kernel/interrupt.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/powerpc/kernel/interrupt.c b/arch/powerpc/kernel/interrupt.c
index 8c532cecbc60..609ba48034de 100644
--- a/arch/powerpc/kernel/interrupt.c
+++ b/arch/powerpc/kernel/interrupt.c
@@ -19,6 +19,7 @@
 #include <asm/time.h>
 #include <asm/tm.h>
 #include <asm/unistd.h>
+#include <asm/entry-common.h>
 
 #if defined(CONFIG_PPC_ADV_DEBUG_REGS) && defined(CONFIG_PPC32)
 unsigned long global_dbcr0[NR_CPUS];
@@ -245,6 +246,8 @@ interrupt_exit_user_prepare_main(unsigned long ret, struct pt_regs *regs)
 	/* Restore user access locks last */
 	kuap_user_restore(regs);
 
+	arch_exit_to_user_mode_prepare(regs, ti_flags);
+
 	return ret;
 }
 
-- 
2.42.0.windows.2