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* [PATCH] powerpc/ptrace: Make user_mode() common to PPC32 and PPC64
@ 2021-08-17 16:00 Christophe Leroy
2021-08-27 13:16 ` Michael Ellerman
0 siblings, 1 reply; 2+ messages in thread
From: Christophe Leroy @ 2021-08-17 16:00 UTC (permalink / raw)
To: Benjamin Herrenschmidt, Paul Mackerras, Michael Ellerman
Cc: linux-kernel, linuxppc-dev
Today we have:
#ifdef __powerpc64__
#define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1)
#else
#define user_mode(regs) (((regs)->msr & MSR_PR) != 0)
#endif
With ppc64_defconfig, we get:
if (!user_mode(regs))
14b4: e9 3e 01 08 ld r9,264(r30)
14b8: 71 29 40 00 andi. r9,r9,16384
14bc: 41 82 07 a4 beq 1c60 <.emulate_instruction+0x7d0>
If taking the ppc32 definition of user_mode(), the exact same code
is generated for ppc64_defconfig.
So, only keep one version of user_mode(), preferably the one not
using MSR_PR_LG which should be kept internal to reg.h.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
arch/powerpc/include/asm/ptrace.h | 4 ----
1 file changed, 4 deletions(-)
diff --git a/arch/powerpc/include/asm/ptrace.h b/arch/powerpc/include/asm/ptrace.h
index 14422e851494..fd60538737a0 100644
--- a/arch/powerpc/include/asm/ptrace.h
+++ b/arch/powerpc/include/asm/ptrace.h
@@ -197,11 +197,7 @@ static inline unsigned long frame_pointer(struct pt_regs *regs)
return 0;
}
-#ifdef __powerpc64__
-#define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1)
-#else
#define user_mode(regs) (((regs)->msr & MSR_PR) != 0)
-#endif
#define force_successful_syscall_return() \
do { \
--
2.25.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH] powerpc/ptrace: Make user_mode() common to PPC32 and PPC64
2021-08-17 16:00 [PATCH] powerpc/ptrace: Make user_mode() common to PPC32 and PPC64 Christophe Leroy
@ 2021-08-27 13:16 ` Michael Ellerman
0 siblings, 0 replies; 2+ messages in thread
From: Michael Ellerman @ 2021-08-27 13:16 UTC (permalink / raw)
To: Michael Ellerman, Christophe Leroy, Paul Mackerras,
Benjamin Herrenschmidt
Cc: linuxppc-dev, linux-kernel
On Tue, 17 Aug 2021 16:00:14 +0000 (UTC), Christophe Leroy wrote:
> Today we have:
>
> #ifdef __powerpc64__
> #define user_mode(regs) ((((regs)->msr) >> MSR_PR_LG) & 0x1)
> #else
> #define user_mode(regs) (((regs)->msr & MSR_PR) != 0)
> #endif
>
> [...]
Applied to powerpc/next.
[1/1] powerpc/ptrace: Make user_mode() common to PPC32 and PPC64
https://git.kernel.org/powerpc/c/19e932eb6ea47f4f37513eb2ae0daee19117765c
cheers
^ permalink raw reply [flat|nested] 2+ messages in thread
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2021-08-17 16:00 [PATCH] powerpc/ptrace: Make user_mode() common to PPC32 and PPC64 Christophe Leroy
2021-08-27 13:16 ` Michael Ellerman
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