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powerpc: add CFUNC assembly label annotation

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This macro is to be used in assembly where C functions are called.
pcrel addressing mode requires branches to functions with a
localentry value of 1 to have either a trailing nop or @notoc.
This macro permits the latter without changing callers.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Add dummy definitions to fix selftests build]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230408021752.862660-5-npiggin@gmail.com
This commit is contained in:
Nicholas Piggin
2023-04-08 12:17:50 +10:00
committed by Michael Ellerman
parent dc5dac748a
commit 4e991e3c16
15 changed files with 114 additions and 103 deletions
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6
arch/powerpc/lib/memcpy_power7.S
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@@ -218,7 +218,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
std r5,-STACKFRAMESIZE+STK_REG(R29)(r1)
std r0,16(r1)
stdu r1,-STACKFRAMESIZE(r1)
bl enter_vmx_ops
bl CFUNC(enter_vmx_ops)
cmpwi cr1,r3,0
ld r0,STACKFRAMESIZE+16(r1)
ld r3,STK_REG(R31)(r1)
@@ -433,7 +433,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
15: addi r1,r1,STACKFRAMESIZE
ld r3,-STACKFRAMESIZE+STK_REG(R31)(r1)
b exit_vmx_ops /* tail call optimise */
b CFUNC(exit_vmx_ops) /* tail call optimise */
.Lvmx_unaligned_copy:
/* Get the destination 16B aligned */
@@ -637,5 +637,5 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
15: addi r1,r1,STACKFRAMESIZE
ld r3,-STACKFRAMESIZE+STK_REG(R31)(r1)
b exit_vmx_ops /* tail call optimise */
b CFUNC(exit_vmx_ops) /* tail call optimise */
#endif /* CONFIG_ALTIVEC */