linux-kernel - [PATCH v2 1/3] powerpc/64s: Replace RFI by RFI_TO

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Message-Id: <7719261b0a0d2787772339484c33eb809723bca7.1604854583.git.christophe.leroy@csgroup.eu>
Date:   Sun,  8 Nov 2020 16:57:35 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v2 1/3] powerpc/64s: Replace RFI by RFI_TO_KERNEL and remove
 RFI

In head_64.S, we have two places using RFI to return to
kernel. Use RFI_TO_KERNEL instead.

They are the two only places using RFI on book3s/64, so
the RFI macro can go away.

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 arch/powerpc/include/asm/ppc_asm.h | 1 -
 arch/powerpc/kernel/head_64.S      | 9 +++++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h
index 511786f0e40d..bedf3eb52ebc 100644
--- a/arch/powerpc/include/asm/ppc_asm.h
+++ b/arch/powerpc/include/asm/ppc_asm.h
@@ -495,7 +495,6 @@ END_FTR_SECTION_NESTED(CPU_FTR_CELL_TB_BUG, CPU_FTR_CELL_TB_BUG, 96)
 #endif
 
 #ifdef CONFIG_PPC_BOOK3S_64
-#define RFI		rfid
 #define MTMSRD(r)	mtmsrd	r
 #define MTMSR_EERI(reg)	mtmsrd	reg,1
 #else
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index 1510b2a56669..ecf9a88988ff 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -41,6 +41,11 @@
 #include <asm/ppc-opcode.h>
 #include <asm/export.h>
 #include <asm/feature-fixups.h>
+#ifdef CONFIG_PPC_BOOK3S
+#include <asm/exception-64s.h>
+#else
+#include <asm/exception-64e.h>
+#endif
 
 /* The physical memory is laid out such that the secondary processor
  * spin code sits at 0x0000...0x00ff. On server, the vectors follow
@@ -829,7 +834,7 @@ __secondary_start:
 
 	mtspr	SPRN_SRR0,r3
 	mtspr	SPRN_SRR1,r4
-	RFI
+	RFI_TO_KERNEL
 	b	.	/* prevent speculative execution */
 
 /* 
@@ -966,7 +971,7 @@ start_here_multiplatform:
 	ld	r4,PACAKMSR(r13)
 	mtspr	SPRN_SRR0,r3
 	mtspr	SPRN_SRR1,r4
-	RFI
+	RFI_TO_KERNEL
 	b	.	/* prevent speculative execution */
 
 	/* This is where all platforms converge execution */
-- 
2.25.0