From: Christophe Leroy christophe.leroy@csgroup.eu
[ Upstream commit 9b97bea90072a075363a200dd7b54ad4a24e9491 ]
cvdso_call_time macro is very similar to cvdso_call macro.
Add a call_time argument to cvdso_call which is 0 by default and set to 1 when using cvdso_call to call __c_kernel_time().
Return returned value as is with CR[SO] cleared when it is used for time().
Signed-off-by: Christophe Leroy christophe.leroy@csgroup.eu Signed-off-by: Michael Ellerman mpe@ellerman.id.au Link: https://lore.kernel.org/r/837a260ad86fc1ce297a562c2117fd69be5f7b5c.164278213... Signed-off-by: Sasha Levin sashal@kernel.org --- arch/powerpc/include/asm/vdso/gettimeofday.h | 37 ++++++-------------- arch/powerpc/kernel/vdso32/gettimeofday.S | 2 +- 2 files changed, 11 insertions(+), 28 deletions(-)
diff --git a/arch/powerpc/include/asm/vdso/gettimeofday.h b/arch/powerpc/include/asm/vdso/gettimeofday.h index 1faff0be1111..df00e91c9a90 100644 --- a/arch/powerpc/include/asm/vdso/gettimeofday.h +++ b/arch/powerpc/include/asm/vdso/gettimeofday.h @@ -9,12 +9,12 @@ #include <asm/ppc_asm.h>
/* - * The macros sets two stack frames, one for the caller and one for the callee + * The macro sets two stack frames, one for the caller and one for the callee * because there are no requirement for the caller to set a stack frame when * calling VDSO so it may have omitted to set one, especially on PPC64 */
-.macro cvdso_call funct +.macro cvdso_call funct call_time=0 .cfi_startproc PPC_STLU r1, -PPC_MIN_STKFRM(r1) mflr r0 @@ -25,45 +25,28 @@ PPC_STL r2, PPC_MIN_STKFRM + STK_GOT(r1) #endif get_datapage r5 + .ifeq \call_time addi r5, r5, VDSO_DATA_OFFSET + .else + addi r4, r5, VDSO_DATA_OFFSET + .endif bl DOTSYM(\funct) PPC_LL r0, PPC_MIN_STKFRM + PPC_LR_STKOFF(r1) #ifdef __powerpc64__ PPC_LL r2, PPC_MIN_STKFRM + STK_GOT(r1) #endif + .ifeq \call_time cmpwi r3, 0 + .endif mtlr r0 .cfi_restore lr addi r1, r1, 2 * PPC_MIN_STKFRM crclr so + .ifeq \call_time beqlr+ crset so neg r3, r3 - blr - .cfi_endproc -.endm - -.macro cvdso_call_time funct - .cfi_startproc - PPC_STLU r1, -PPC_MIN_STKFRM(r1) - mflr r0 - .cfi_register lr, r0 - PPC_STLU r1, -PPC_MIN_STKFRM(r1) - PPC_STL r0, PPC_MIN_STKFRM + PPC_LR_STKOFF(r1) -#ifdef __powerpc64__ - PPC_STL r2, PPC_MIN_STKFRM + STK_GOT(r1) -#endif - get_datapage r4 - addi r4, r4, VDSO_DATA_OFFSET - bl DOTSYM(\funct) - PPC_LL r0, PPC_MIN_STKFRM + PPC_LR_STKOFF(r1) -#ifdef __powerpc64__ - PPC_LL r2, PPC_MIN_STKFRM + STK_GOT(r1) -#endif - crclr so - mtlr r0 - .cfi_restore lr - addi r1, r1, 2 * PPC_MIN_STKFRM + .endif blr .cfi_endproc .endm diff --git a/arch/powerpc/kernel/vdso32/gettimeofday.S b/arch/powerpc/kernel/vdso32/gettimeofday.S index d21d08140a5e..9b3ac09423c8 100644 --- a/arch/powerpc/kernel/vdso32/gettimeofday.S +++ b/arch/powerpc/kernel/vdso32/gettimeofday.S @@ -63,7 +63,7 @@ V_FUNCTION_END(__kernel_clock_getres) * */ V_FUNCTION_BEGIN(__kernel_time) - cvdso_call_time __c_kernel_time + cvdso_call __c_kernel_time call_time=1 V_FUNCTION_END(__kernel_time)
/* Routines for restoring integer registers, called by the compiler. */