[RFC PATCH v1 28/41] powerpc/32: Add a prepare_transfer_to_handler macro for exception prologs
From: Christophe Leroy <hidden>
Date: 2021-02-09 10:11:17
Also in:
linuxppc-dev
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
In order to increase flexibility, add a macro that will for now call transfer_to_handler. As transfer_to_handler doesn't do the actual transfer anymore, also name it prepare_transfer_to_handler. The following patches will progressively remove the use of transfer_to_handler label. Signed-off-by: Christophe Leroy <redacted> --- arch/powerpc/kernel/entry_32.S | 3 +++ arch/powerpc/kernel/head_32.h | 4 ++++ arch/powerpc/kernel/head_booke.h | 4 ++++ 3 files changed, 11 insertions(+)
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 890a4508c1f1..03f4d07f4176 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S@@ -86,6 +86,8 @@ _ASM_NOKPROBE_SYMBOL(transfer_to_handler_full) .globl transfer_to_handler transfer_to_handler: + .globl prepare_transfer_to_handler +prepare_transfer_to_handler: SAVE_NVGPRS(r11) addi r3,r1,STACK_FRAME_OVERHEAD stw r2,GPR2(r11)
@@ -133,6 +135,7 @@ transfer_to_handler_cont: stw r9,_MSR(r11) b fast_exception_return #endif +_ASM_NOKPROBE_SYMBOL(prepare_transfer_to_handler) _ASM_NOKPROBE_SYMBOL(transfer_to_handler) _ASM_NOKPROBE_SYMBOL(transfer_to_handler_cont)
diff --git a/arch/powerpc/kernel/head_32.h b/arch/powerpc/kernel/head_32.h
index bf4c288173ad..3ab0f3ad9a6a 100644
--- a/arch/powerpc/kernel/head_32.h
+++ b/arch/powerpc/kernel/head_32.h@@ -115,6 +115,10 @@ _ASM_NOKPROBE_SYMBOL(\name\()_virt) .endm +.macro prepare_transfer_to_handler + bl prepare_transfer_to_handler +.endm + .macro SYSCALL_ENTRY trapno mfspr r9, SPRN_SRR1 mfspr r10, SPRN_SRR0
diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
index 12add20edbb1..9bc86aab65ef 100644
--- a/arch/powerpc/kernel/head_booke.h
+++ b/arch/powerpc/kernel/head_booke.h@@ -87,6 +87,10 @@ END_BTB_FLUSH_SECTION SAVE_4GPRS(3, r11); \ SAVE_2GPRS(7, r11) +.macro prepare_transfer_to_handler + bl prepare_transfer_to_handler +.endm + .macro SYSCALL_ENTRY trapno intno srr1 mfspr r10, SPRN_SPRG_THREAD #ifdef CONFIG_KVM_BOOKE_HV
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2.25.0