[PATCH 1/2] powerpc/32s: Rename head_32.S to head_book3s_32.S

[PATCH 1/2] powerpc/32s: Rename head_32.S to head_book3s_32.S

[Christophe Leroy]

Unlike PPC64 which had a single head_64.S, PPC32 are multiple ones.
There is the head_32.S, selected by default based on the value of BITS
and overridden based on some CONFIG_ values. This leads to thinking
that it may be selected by different types of PPC32 platform but
indeed it ends up being selected by book3s/32 only.

Make that explicit by:
- Not doing any default selection based on BITS.
- Renaming head_32.S to head_book3s_32.S.
- Get head_book3s_32.S selected only by CONFIG_PPC_BOOK3S_32.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
 arch/powerpc/kernel/Makefile                        | 3 ++-
 arch/powerpc/kernel/{head_32.S => head_book3s_32.S} | 2 +-
 2 files changed, 3 insertions(+), 2 deletions(-)
 rename arch/powerpc/kernel/{head_32.S => head_book3s_32.S} (99%)

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index a5550c2b24c4..bf0bf1b900d2 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -95,7 +95,8 @@ obj-$(CONFIG_PPC_FSL_BOOK3E)	+= cpu_setup_fsl_booke.o
 obj-$(CONFIG_PPC_DOORBELL)	+= dbell.o
 obj-$(CONFIG_JUMP_LABEL)	+= jump_label.o
 
-extra-y				:= head_$(BITS).o
+extra-$(CONFIG_PPC64)		:= head_64.o
+extra-$(CONFIG_PPC_BOOK3S_32)	:= head_book3s_32.o
 extra-$(CONFIG_40x)		:= head_40x.o
 extra-$(CONFIG_44x)		:= head_44x.o
 extra-$(CONFIG_FSL_BOOKE)	:= head_fsl_booke.o
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_book3s_32.S
similarity index 99%
rename from arch/powerpc/kernel/head_32.S
rename to arch/powerpc/kernel/head_book3s_32.S
index 35627693c2a4..e07a2c07ffe4 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_book3s_32.S
@@ -61,7 +61,7 @@
 
 	__HEAD
 	.stabs	"arch/powerpc/kernel/",N_SO,0,0,0f
-	.stabs	"head_32.S",N_SO,0,0,0f
+	.stabs	"head_book3s_32.S",N_SO,0,0,0f
 0:
 _ENTRY(_stext);
 
-- 
2.25.0

[PATCH 2/2] powerpc/32s: Remove #ifdef CONFIG_PPC_BOOK3S_32 in head_book3s_32.S

[Christophe Leroy]

head_book3s_32.S is only built when CONFIG_PPC_BOOK3S_32 is selected.

Remove all conditions based on CONFIG_PPC_BOOK3S_32 in the file.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
 arch/powerpc/kernel/head_book3s_32.S | 15 ---------------
 1 file changed, 15 deletions(-)

diff --git a/arch/powerpc/kernel/head_book3s_32.S b/arch/powerpc/kernel/head_book3s_32.S
index e07a2c07ffe4..f659378adaf3 100644
--- a/arch/powerpc/kernel/head_book3s_32.S
+++ b/arch/powerpc/kernel/head_book3s_32.S
@@ -183,10 +183,8 @@ __after_mmu_off:
 	bl	reloc_offset
 	li	r24,0			/* cpu# */
 	bl	call_setup_cpu		/* Call setup_cpu for this CPU */
-#ifdef CONFIG_PPC_BOOK3S_32
 	bl	reloc_offset
 	bl	init_idle_6xx
-#endif /* CONFIG_PPC_BOOK3S_32 */
 
 
 /*
@@ -892,10 +890,8 @@ __secondary_start:
 	lis	r3,-KERNELBASE@h
 	mr	r4,r24
 	bl	call_setup_cpu		/* Call setup_cpu for this CPU */
-#ifdef CONFIG_PPC_BOOK3S_32
 	lis	r3,-KERNELBASE@h
 	bl	init_idle_6xx
-#endif /* CONFIG_PPC_BOOK3S_32 */
 
 	/* get current's stack and current */
 	lis	r2,secondary_current@ha
@@ -936,17 +932,6 @@ __secondary_start:
 #include "../kvm/book3s_rmhandlers.S"
 #endif
 
-/*
- * Those generic dummy functions are kept for CPUs not
- * included in CONFIG_PPC_BOOK3S_32
- */
-#if !defined(CONFIG_PPC_BOOK3S_32)
-_ENTRY(__save_cpu_setup)
-	blr
-_ENTRY(__restore_cpu_setup)
-	blr
-#endif /* !defined(CONFIG_PPC_BOOK3S_32) */
-
 /*
  * Load stuff into the MMU.  Intended to be called with
  * IR=0 and DR=0.
-- 
2.25.0

Re: [PATCH 1/2] powerpc/32s: Rename head_32.S to head_book3s_32.S

[Michael Ellerman]

On Tue, 6 Oct 2020 09:05:26 +0000 (UTC), Christophe Leroy wrote:
> Unlike PPC64 which had a single head_64.S, PPC32 are multiple ones.
> There is the head_32.S, selected by default based on the value of BITS
> and overridden based on some CONFIG_ values. This leads to thinking
> that it may be selected by different types of PPC32 platform but
> indeed it ends up being selected by book3s/32 only.
> 
> Make that explicit by:
> - Not doing any default selection based on BITS.
> - Renaming head_32.S to head_book3s_32.S.
> - Get head_book3s_32.S selected only by CONFIG_PPC_BOOK3S_32.

Applied to powerpc/next.

[1/2] powerpc/32s: Rename head_32.S to head_book3s_32.S
      https://git.kernel.org/powerpc/c/533090e5a980ad80bbe0961b4ed45a9bcf55cc0c
[2/2] powerpc/32s: Remove #ifdef CONFIG_PPC_BOOK3S_32 in head_book3s_32.S
      https://git.kernel.org/powerpc/c/865418795a1dea1c2b58a5fd7b6bdcb93e0c36b8

cheers