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From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
	Paul Mackerras <paulus@samba.org>,
	Michael Ellerman <mpe@ellerman.id.au>,
	npiggin@gmail.com
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v3 36/41] powerpc/32: Only use prepare_transfer_to_handler function on book3s/32 and e500
Date: Fri, 12 Mar 2021 12:50:46 +0000 (UTC)	[thread overview]
Message-ID: <b5e29ca0e557c11340415a13fe8b107189d315e1.1615552867.git.christophe.leroy@csgroup.eu> (raw)
In-Reply-To: <cover.1615552866.git.christophe.leroy@csgroup.eu>

Only book3s/32 and e500 have significative work to do in
prepare_transfer_to_handler.

Other 32 bit have nothing to do at all.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
 arch/powerpc/kernel/entry_32.S   | 6 ++----
 arch/powerpc/kernel/head_32.h    | 2 ++
 arch/powerpc/kernel/head_booke.h | 2 ++
 3 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index b9a2935efec1..44d0eddf8738 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -48,6 +48,7 @@
  */
 	.align	12
 
+#if defined(CONFIG_PPC_BOOK3S_32) || defined(CONFIG_E500)
 	.globl	prepare_transfer_to_handler
 prepare_transfer_to_handler:
 	andi.	r12,r9,MSR_PR
@@ -61,15 +62,12 @@ prepare_transfer_to_handler:
 	/* if from kernel, check interrupted DOZE/NAP mode */
 2:
 	kuap_save_and_lock r11, r12, r9, r5, r6
-#if defined(CONFIG_PPC_BOOK3S_32) || defined(CONFIG_E500)
 	lwz	r12,TI_LOCAL_FLAGS(r2)
 	mtcrf	0x01,r12
 	bt-	31-TLF_NAPPING,4f
 	bt-	31-TLF_SLEEPING,7f
-#endif /* CONFIG_PPC_BOOK3S_32 || CONFIG_E500 */
 	blr
 
-#if defined (CONFIG_PPC_BOOK3S_32) || defined(CONFIG_E500)
 4:	rlwinm	r12,r12,0,~_TLF_NAPPING
 	stw	r12,TI_LOCAL_FLAGS(r2)
 	b	power_save_ppc32_restore
@@ -82,8 +80,8 @@ prepare_transfer_to_handler:
 	kuap_restore r11, r2, r3, r4, r5
 	lwz	r2, GPR2(r11)
 	b	fast_exception_return
-#endif
 _ASM_NOKPROBE_SYMBOL(prepare_transfer_to_handler)
+#endif /* CONFIG_PPC_BOOK3S_32 || CONFIG_E500 */
 
 	.globl	transfer_to_syscall
 transfer_to_syscall:
diff --git a/arch/powerpc/kernel/head_32.h b/arch/powerpc/kernel/head_32.h
index 80e45c800496..c018fcdf9157 100644
--- a/arch/powerpc/kernel/head_32.h
+++ b/arch/powerpc/kernel/head_32.h
@@ -132,7 +132,9 @@ _ASM_NOKPROBE_SYMBOL(\name\()_virt)
 .endm
 
 .macro prepare_transfer_to_handler
+#ifdef CONFIG_PPC_BOOK3S_32
 	bl	prepare_transfer_to_handler
+#endif
 .endm
 
 .macro SYSCALL_ENTRY trapno
diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
index 7f3dd5fae51d..cb96ae002af6 100644
--- a/arch/powerpc/kernel/head_booke.h
+++ b/arch/powerpc/kernel/head_booke.h
@@ -104,7 +104,9 @@ END_BTB_FLUSH_SECTION
 .endm
 
 .macro prepare_transfer_to_handler
+#ifdef CONFIG_E500
 	bl	prepare_transfer_to_handler
+#endif
 .endm
 
 .macro SYSCALL_ENTRY trapno intno srr1
-- 
2.25.0


  parent reply	other threads:[~2021-03-12 12:51 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-12 12:50 [PATCH v3 00/41] powerpc/32: Switch to interrupt entry/exit in C Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 01/41] powerpc/traps: Declare unrecoverable_exception() as __noreturn Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 02/41] powerpc/40x: Don't use SPRN_SPRG_SCRATCH0/1 in TLB miss handlers Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 03/41] powerpc/40x: Change CRITICAL_EXCEPTION_PROLOG macro to a gas macro Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 04/41] powerpc/40x: Save SRR0/SRR1 and r10/r11 earlier in critical exception Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 05/41] powerpc/40x: Reorder a few instructions in critical exception prolog Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 06/41] powerpc/40x: Prepare for enabling MMU " Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 07/41] powerpc/40x: Prepare normal exception handler for enabling MMU early Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 08/41] powerpc/32: Reconcile interrupts in C Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 09/41] powerpc/32: Entry cpu time accounting " Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 10/41] powerpc/32: Handle bookE debugging in C in exception entry Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 11/41] powerpc/32: Use fast instruction to set MSR RI in exception prolog on 8xx Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 12/41] powerpc/32: Remove ksp_limit Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 13/41] powerpc/32: Always enable data translation in exception prolog Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 14/41] powerpc/32: Tag DAR in EXCEPTION_PROLOG_2 for the 8xx Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 15/41] powerpc/32: Enable instruction translation at the same time as data translation Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 16/41] powerpc/32: Statically initialise first emergency context Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 17/41] powerpc/32: Add vmap_stack_overflow label inside the macro Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 18/41] powerpc/32: Use START_EXCEPTION() as much as possible Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 19/41] powerpc/32: Move exception prolog code into .text once MMU is back on Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 20/41] powerpc/32: Provide a name to exception prolog continuation in virtual mode Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 21/41] powerpc/32: Refactor booke critical registers saving Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 22/41] powerpc/32: Perform normal function call in exception entry Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 23/41] powerpc/32: Always save non volatile registers on " Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 24/41] powerpc/32: Replace ASM exception exit by C exception exit from ppc64 Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 25/41] powerpc/32: Don't save thread.regs on interrupt entry Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 26/41] powerpc/32: Set regs parameter in r3 in transfer_to_handler Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 27/41] powerpc/32: Call bad_page_fault() from do_page_fault() Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 28/41] powerpc/32: Save trap number on stack in exception prolog Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 29/41] powerpc/32: Add a prepare_transfer_to_handler macro for exception prologs Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 30/41] powerpc/32: Only restore non volatile registers when required Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 31/41] powerpc/32: Dismantle EXC_XFER_STD/LITE/TEMPLATE Christophe Leroy
2021-07-31 10:12   ` Finn Thain
2021-07-31 15:39     ` Christophe Leroy
2021-08-01  1:21       ` Finn Thain
     [not found]         ` <34e52975-4ab9-4eb4-3501-02376e38a27c@yahoo.com>
2021-08-01 23:48           ` Finn Thain
2021-08-02 15:19         ` LEROY Christophe
2021-08-03  0:43           ` Finn Thain
     [not found]           ` <62d36dbb-4b39-f5bd-7962-4dcfbea729b3@linux-m68k.org>
     [not found]             ` <683c8156-97b0-5ba7-ce31-2e8613089836@yahoo.com>
2021-08-04  4:57               ` Finn Thain
2021-07-31 16:40     ` Christophe Leroy
2021-08-01  1:39       ` Finn Thain
2021-03-12 12:50 ` [PATCH v3 32/41] powerpc/32: Remove the xfer parameter in EXCEPTION() macro Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 33/41] powerpc/32: Refactor saving of volatile registers in exception prologs Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 34/41] powerpc/32: Save remaining registers in exception prolog Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 35/41] powerpc/32: Return directly from power_save_ppc32_restore() Christophe Leroy
2021-03-12 12:50 ` Christophe Leroy [this message]
2021-03-12 12:50 ` [PATCH v3 37/41] powerpc/32s: Move KUEP locking/unlocking in C Christophe Leroy
2021-03-27 17:24   ` Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 38/41] powerpc/64s: Make kuap_check_amr() and kuap_get_and_check_amr() generic Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 39/41] powerpc/32s: Create C version of kuap save/restore/check helpers Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 40/41] powerpc/8xx: " Christophe Leroy
2021-03-12 12:50 ` [PATCH v3 41/41] powerpc/32: Manage KUAP in C Christophe Leroy
2021-03-31  1:09 ` [PATCH v3 00/41] powerpc/32: Switch to interrupt entry/exit " Michael Ellerman

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