diff options
| author |   Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-06-04 14:54:14 +0000 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2021-06-25 00:07:10 +1000 |
| commit | 4bd9e05ac7b8b1f7d0c28702cb684417501a5e39 (patch) | |
| tree | 0c0722fa29cbde6ea0c6361e1ed54ac5e56ac47a | |
| parent | powerpc/32: Interchange r1 and r11 in SYSCALL_ENTRY on booke (diff) | |
| download | linux-dev-4bd9e05ac7b8b1f7d0c28702cb684417501a5e39.tar.xz linux-dev-4bd9e05ac7b8b1f7d0c28702cb684417501a5e39.zip | |
powerpc/32: Reduce code duplication of system call entry
booke and non booke do pretty similar things in SYSCALL_ENTRY macro
just before calling jumping to transfer_to_syscall().
Do them in transfer_to_syscall() instead.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/552e27fa09394a6bc70585fcdfa237f99a5d1267.1622818435.git.christophe.leroy@csgroup.eu
| -rw-r--r-- | arch/powerpc/kernel/entry_32.S | 19 | ||||
| -rw-r--r-- | arch/powerpc/kernel/head_32.h | 19 | ||||
| -rw-r--r-- | arch/powerpc/kernel/head_booke.h | 18 |
3 files changed, 19 insertions, 37 deletions
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S index 6c09ebb853ec..0273a1349006 100644 --- a/arch/powerpc/kernel/entry_32.S +++ b/arch/powerpc/kernel/entry_32.S @@ -32,6 +32,7 @@ #include <asm/barrier.h> #include <asm/kup.h> #include <asm/bug.h> +#include <asm/interrupt.h> #include "head_32.h" @@ -74,6 +75,24 @@ _ASM_NOKPROBE_SYMBOL(prepare_transfer_to_handler) .globl transfer_to_syscall transfer_to_syscall: + stw r11, GPR1(r1) + stw r11, 0(r1) + mflr r12 + stw r12, _LINK(r1) +#if defined(CONFIG_BOOKE) || defined(CONFIG_40x) + rlwinm r9,r9,0,14,12 /* clear MSR_WE (necessary?) */ +#endif + lis r12,STACK_FRAME_REGS_MARKER@ha /* exception frame marker */ + SAVE_GPR(2, r1) + addi r12,r12,STACK_FRAME_REGS_MARKER@l + stw r9,_MSR(r1) + li r2, INTERRUPT_SYSCALL + stw r12,8(r1) + stw r2,_TRAP(r1) + SAVE_GPR(0, r1) + SAVE_4GPRS(3, r1) + SAVE_2GPRS(7, r1) + addi r2,r10,-THREAD SAVE_NVGPRS(r1) /* Calling convention has r9 = orig r0, r10 = regs */ diff --git a/arch/powerpc/kernel/head_32.h b/arch/powerpc/kernel/head_32.h index 7ca25eb9bc75..6b1ec9e3541b 100644 --- a/arch/powerpc/kernel/head_32.h +++ b/arch/powerpc/kernel/head_32.h @@ -155,29 +155,10 @@ _ASM_NOKPROBE_SYMBOL(\name\()_virt) addi r1, r1, THREAD_SIZE - INT_FRAME_SIZE rfi 1: - stw r11,GPR1(r1) - stw r11,0(r1) - mr r11, r1 stw r12,_NIP(r1) - mflr r12 - stw r12, _LINK(r11) mfcr r12 rlwinm r12,r12,0,4,2 /* Clear SO bit in CR */ stw r12,_CCR(r1) -#ifdef CONFIG_40x - rlwinm r9,r9,0,14,12 /* clear MSR_WE (necessary?) */ -#endif - lis r12,STACK_FRAME_REGS_MARKER@ha /* exception frame marker */ - stw r2,GPR2(r11) - addi r12,r12,STACK_FRAME_REGS_MARKER@l - stw r9,_MSR(r11) - li r2, \trapno - stw r12,8(r11) - stw r2,_TRAP(r11) - SAVE_GPR(0, r11) - SAVE_4GPRS(3, r11) - SAVE_2GPRS(7, r11) - addi r2,r10,-THREAD b transfer_to_syscall /* jump to handler */ .endm diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h index 4a2fad9f225e..10f31146b472 100644 --- a/arch/powerpc/kernel/head_booke.h +++ b/arch/powerpc/kernel/head_booke.h @@ -140,26 +140,8 @@ ALT_FTR_SECTION_END_IFSET(CPU_FTR_EMB_HV) rlwinm r12,r12,0,4,2 /* Clear SO bit in CR */ ALLOC_STACK_FRAME(r1, THREAD_SIZE - INT_FRAME_SIZE) stw r12, _CCR(r1) - mflr r12 - stw r12,_LINK(r1) mfspr r12,SPRN_SRR0 - stw r11, GPR1(r1) - stw r11, 0(r1) - mr r11, r1 stw r12,_NIP(r1) - rlwinm r9,r9,0,14,12 /* clear MSR_WE (necessary?) */ - lis r12, STACK_FRAME_REGS_MARKER@ha /* exception frame marker */ - stw r2,GPR2(r11) - addi r12, r12, STACK_FRAME_REGS_MARKER@l - stw r9,_MSR(r11) - li r2, \trapno - stw r12, 8(r11) - stw r2,_TRAP(r11) - SAVE_GPR(0, r11) - SAVE_4GPRS(3, r11) - SAVE_2GPRS(7, r11) - - addi r2,r10,-THREAD b transfer_to_syscall /* jump to handler */ .endm |