Subject: [PATCH 11/17] powerpc/64s/exception: Move EXCEPTION_COMMON additions into callers

From: Nicholas Piggin <[email-masked]>
Date: Tue, 5 Feb 2019 00:18:22 +1000

More cases of code insertion via macros that does not add a great
deal. All the additions have to be specified in the macro arguments,
so they can just as well go after the macro.

Signed-off-by: Nicholas Piggin <[email-masked]>
---
 arch/powerpc/include/asm/exception-64s.h | 42 +++++++---------------
 arch/powerpc/include/asm/head-64.h       |  4 +--
 arch/powerpc/kernel/exceptions-64s.S     | 45 +++++++++++++-----------
 3 files changed, 39 insertions(+), 52 deletions(-)

diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h
index 676c877f6190..05e8aff58d96 100644
--- a/arch/powerpc/include/asm/exception-64s.h
+++ b/arch/powerpc/include/asm/exception-64s.h
@@ -638,21 +638,6 @@ END_FTR_SECTION_NESTED(ftr,ftr,943)
 	EXCEPTION_PROLOG_1 EXC_HV, PACA_EXGEN, 1, vec, bitmask ;	\
 	EXCEPTION_PROLOG_2_VIRT label, EXC_HV
 
-/*
- * Our exception common code can be passed various "additions"
- * to specify the behaviour of interrupts, whether to kick the
- * runlatch, etc...
- */
-
-/*
- * This addition reconciles our actual IRQ state with the various software
- * flags that track it. This may call C code.
- */
-#define ADD_RECONCILE	RECONCILE_IRQ_STATE(r10,r11)
-
-#define ADD_NVGPRS				\
-	bl	save_nvgprs
-
 #define RUNLATCH_ON				\
 BEGIN_FTR_SECTION				\
 	CURRENT_THREAD_INFO(r3, r1);		\
@@ -661,24 +646,21 @@ BEGIN_FTR_SECTION				\
 	beql	ppc64_runlatch_on_trampoline;	\
 END_FTR_SECTION_IFSET(CPU_FTR_CTRL)
 
-#define EXCEPTION_COMMON(area, trap, label, additions)		\
+#define EXCEPTION_COMMON(area, trap)				\
 	EXCEPTION_PROLOG_COMMON(trap, area);			\
-	/* Volatile regs are potentially clobbered here */	\
-	additions
 
 /*
- * Exception where stack is already set in r1, r1 is saved in r10, and it
- * continues rather than returns.
+ * Exception where stack is already set in r1, r1 is saved in r10
  */
-#define EXCEPTION_COMMON_NORET_STACK(area, trap, label, additions) \
+#define EXCEPTION_COMMON_STACK(area, trap)			\
 	EXCEPTION_PROLOG_COMMON_1();				\
 	EXCEPTION_PROLOG_COMMON_2(area);			\
-	EXCEPTION_PROLOG_COMMON_3(trap);			\
-	/* Volatile regs are potentially clobbered here */	\
-	additions
+	EXCEPTION_PROLOG_COMMON_3(trap)
 
-#define STD_EXCEPTION_COMMON(trap, label, hdlr)			\
-	EXCEPTION_COMMON(PACA_EXGEN, trap, label, ADD_NVGPRS;ADD_RECONCILE); \
+#define STD_EXCEPTION_COMMON(trap, hdlr)			\
+	EXCEPTION_COMMON(PACA_EXGEN, trap);			\
+	bl	save_nvgprs;					\
+	RECONCILE_IRQ_STATE(r10, r11);				\
 	addi	r3,r1,STACK_FRAME_OVERHEAD;			\
 	bl	hdlr;						\
 	b	ret_from_except
@@ -688,9 +670,11 @@ END_FTR_SECTION_IFSET(CPU_FTR_CTRL)
  * in the idle task and therefore need the special idle handling
  * (finish nap and runlatch)
  */
-#define STD_EXCEPTION_COMMON_ASYNC(trap, label, hdlr)		\
-	EXCEPTION_COMMON(PACA_EXGEN, trap, label,		\
-		FINISH_NAP;ADD_RECONCILE;RUNLATCH_ON);		\
+#define STD_EXCEPTION_COMMON_ASYNC(trap, hdlr)			\
+	EXCEPTION_COMMON(PACA_EXGEN, trap);			\
+	FINISH_NAP;						\
+	RECONCILE_IRQ_STATE(r10, r11);				\
+	RUNLATCH_ON;						\
 	addi	r3,r1,STACK_FRAME_OVERHEAD;			\
 	bl	hdlr;						\
 	b	ret_from_except_lite
diff --git a/arch/powerpc/include/asm/head-64.h b/arch/powerpc/include/asm/head-64.h
index bdd67a26e959..acd94fcf9f40 100644
--- a/arch/powerpc/include/asm/head-64.h
+++ b/arch/powerpc/include/asm/head-64.h
@@ -403,11 +403,11 @@ end_##sname:
 
 #define EXC_COMMON(name, realvec, hdlr)					\
 	EXC_COMMON_BEGIN(name);						\
-	STD_EXCEPTION_COMMON(realvec, name, hdlr)
+	STD_EXCEPTION_COMMON(realvec, hdlr)
 
 #define EXC_COMMON_ASYNC(name, realvec, hdlr)				\
 	EXC_COMMON_BEGIN(name);						\
-	STD_EXCEPTION_COMMON_ASYNC(realvec, name, hdlr)
+	STD_EXCEPTION_COMMON_ASYNC(realvec, hdlr)
 
 #endif /* __ASSEMBLY__ */
 
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 6f0c270f45e4..346df79dca6a 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -149,21 +149,6 @@ EXC_COMMON_BEGIN(system_reset_idle_common)
 	b	pnv_powersave_wakeup
 #endif
 
-/*
- * Set IRQS_ALL_DISABLED unconditionally so arch_irqs_disabled does
- * the right thing. We do not want to reconcile because that goes
- * through irq tracing which we don't want in NMI.
- *
- * Save PACAIRQHAPPENED because some code will do a hard disable
- * (e.g., xmon). So we want to restore this back to where it was
- * when we return. DAR is unused in the stack, so save it there.
- */
-#define ADD_RECONCILE_NMI						\
-	li	r10,IRQS_ALL_DISABLED;					\
-	stb	r10,PACAIRQSOFTMASK(r13);				\
-	lbz	r10,PACAIRQHAPPENED(r13);				\
-	std	r10,_DAR(r1)
-
 EXC_COMMON_BEGIN(system_reset_common)
 	/*
 	 * Increment paca->in_nmi then enable MSR_RI. SLB or MCE will be able
@@ -180,8 +165,22 @@ EXC_COMMON_BEGIN(system_reset_common)
 	mr	r10,r1
 	ld	r1,PACA_NMI_EMERG_SP(r13)
 	subi	r1,r1,INT_FRAME_SIZE
-	EXCEPTION_COMMON_NORET_STACK(PACA_EXNMI, 0x100, system_reset,
-					ADD_NVGPRS;ADD_RECONCILE_NMI)
+	EXCEPTION_COMMON_STACK(PACA_EXNMI, 0x100)
+	bl	save_nvgprs
+	/*
+	 * Set IRQS_ALL_DISABLED unconditionally so arch_irqs_disabled does
+	 * the right thing. We do not want to reconcile because that goes
+	 * through irq tracing which we don't want in NMI.
+	 *
+	 * Save PACAIRQHAPPENED because some code will do a hard disable
+	 * (e.g., xmon). So we want to restore this back to where it was
+	 * when we return. DAR is unused in the stack, so save it there.
+	 */
+	li	r10,IRQS_ALL_DISABLED
+	stb	r10,PACAIRQSOFTMASK(r13)
+	lbz	r10,PACAIRQHAPPENED(r13)
+	std	r10,_DAR(r1)
+
 	addi	r3,r1,STACK_FRAME_OVERHEAD
 	bl	system_reset_exception
 
@@ -1091,8 +1090,11 @@ hmi_exception_after_realmode:
 	b	tramp_real_hmi_exception
 
 EXC_COMMON_BEGIN(hmi_exception_common)
-EXCEPTION_COMMON(PACA_EXGEN, 0xe60, hmi_exception_common,
-			FINISH_NAP;ADD_NVGPRS;ADD_RECONCILE;RUNLATCH_ON)
+	EXCEPTION_COMMON(PACA_EXGEN, 0xe60)
+	FINISH_NAP
+	bl	save_nvgprs
+	RECONCILE_IRQ_STATE(r10, r11)
+	RUNLATCH_ON
 	addi	r3,r1,STACK_FRAME_OVERHEAD
 	bl	handle_hmi_exception
 	b	ret_from_except
@@ -1390,8 +1392,9 @@ EXC_COMMON_BEGIN(soft_nmi_common)
 	mr	r10,r1
 	ld	r1,PACAEMERGSP(r13)
 	subi	r1,r1,INT_FRAME_SIZE
-	EXCEPTION_COMMON_NORET_STACK(PACA_EXGEN, 0x900, system_reset,
-					ADD_NVGPRS;ADD_RECONCILE)
+	EXCEPTION_COMMON_STACK(PACA_EXGEN, 0x900)
+	bl	save_nvgprs
+	RECONCILE_IRQ_STATE(r10, r11)
 	addi	r3,r1,STACK_FRAME_OVERHEAD
 	bl	soft_nmi_interrupt
 	b	ret_from_except
-- 
2.18.0