powerpc: add CFUNC assembly label annotation

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

1 files changed, 56 insertions, 56 deletions

diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 6441a1ba57ac..c33c8ebf8641 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -1075,7 +1075,7 @@ EXC_COMMON_BEGIN(system_reset_common)
 	__GEN_COMMON_BODY system_reset
 
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	system_reset_exception
+	bl	CFUNC(system_reset_exception)
 
 	/* Clear MSR_RI before setting SRR0 and SRR1. */
 	li	r9,0
@@ -1223,9 +1223,9 @@ BEGIN_FTR_SECTION
 END_FTR_SECTION_IFSET(CPU_FTR_HVMODE)
 	addi	r3,r1,STACK_INT_FRAME_REGS
 BEGIN_FTR_SECTION
-	bl	machine_check_early_boot
+	bl	CFUNC(machine_check_early_boot)
 END_FTR_SECTION(0, 1)     // nop out after boot
-	bl	machine_check_early
+	bl	CFUNC(machine_check_early)
 	std	r3,RESULT(r1)	/* Save result */
 	ld	r12,_MSR(r1)
 
@@ -1286,7 +1286,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_HVMODE | CPU_FTR_ARCH_206)
 	 * Queue up the MCE event so that we can log it later, while
 	 * returning from kernel or opal call.
 	 */
-	bl	machine_check_queue_event
+	bl	CFUNC(machine_check_queue_event)
 	MACHINE_CHECK_HANDLER_WINDUP
 	RFI_TO_KERNEL
 
@@ -1312,7 +1312,7 @@ EXC_COMMON_BEGIN(machine_check_common)
 	 */
 	GEN_COMMON machine_check
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	machine_check_exception_async
+	bl	CFUNC(machine_check_exception_async)
 	b	interrupt_return_srr
 
 
@@ -1322,7 +1322,7 @@ EXC_COMMON_BEGIN(machine_check_common)
  * done. Queue the event then call the idle code to do the wake up.
  */
 EXC_COMMON_BEGIN(machine_check_idle_common)
-	bl	machine_check_queue_event
+	bl	CFUNC(machine_check_queue_event)
 
 	/*
 	 * GPR-loss wakeups are relatively straightforward, because the
@@ -1361,7 +1361,7 @@ EXC_COMMON_BEGIN(unrecoverable_mce)
 BEGIN_FTR_SECTION
 	li	r10,0 /* clear MSR_RI */
 	mtmsrd	r10,1
-	bl	disable_machine_check
+	bl	CFUNC(disable_machine_check)
 END_FTR_SECTION_IFSET(CPU_FTR_HVMODE)
 	ld	r10,PACAKMSR(r13)
 	li	r3,MSR_ME
@@ -1378,14 +1378,14 @@ END_FTR_SECTION_IFSET(CPU_FTR_HVMODE)
 	 * the early handler which is a true NMI.
 	 */
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	machine_check_exception
+	bl	CFUNC(machine_check_exception)
 
 	/*
 	 * We will not reach here. Even if we did, there is no way out.
 	 * Call unrecoverable_exception and die.
 	 */
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	unrecoverable_exception
+	bl	CFUNC(unrecoverable_exception)
 	b	.
 
 
@@ -1440,16 +1440,16 @@ EXC_COMMON_BEGIN(data_access_common)
 	bne-	1f
 #ifdef CONFIG_PPC_64S_HASH_MMU
 BEGIN_MMU_FTR_SECTION
-	bl	do_hash_fault
+	bl	CFUNC(do_hash_fault)
 MMU_FTR_SECTION_ELSE
-	bl	do_page_fault
+	bl	CFUNC(do_page_fault)
 ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX)
 #else
-	bl	do_page_fault
+	bl	CFUNC(do_page_fault)
 #endif
 	b	interrupt_return_srr
 
-1:	bl	do_break
+1:	bl	CFUNC(do_break)
 	/*
 	 * do_break() may have changed the NV GPRS while handling a breakpoint.
 	 * If so, we need to restore them with their updated values.
@@ -1493,7 +1493,7 @@ EXC_COMMON_BEGIN(data_access_slb_common)
 BEGIN_MMU_FTR_SECTION
 	/* HPT case, do SLB fault */
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	do_slb_fault
+	bl	CFUNC(do_slb_fault)
 	cmpdi	r3,0
 	bne-	1f
 	b	fast_interrupt_return_srr
@@ -1507,7 +1507,7 @@ ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX)
 #endif
 	std	r3,RESULT(r1)
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	do_bad_segment_interrupt
+	bl	CFUNC(do_bad_segment_interrupt)
 	b	interrupt_return_srr
 
 
@@ -1541,12 +1541,12 @@ EXC_COMMON_BEGIN(instruction_access_common)
 	addi	r3,r1,STACK_INT_FRAME_REGS
 #ifdef CONFIG_PPC_64S_HASH_MMU
 BEGIN_MMU_FTR_SECTION
-	bl	do_hash_fault
+	bl	CFUNC(do_hash_fault)
 MMU_FTR_SECTION_ELSE
-	bl	do_page_fault
+	bl	CFUNC(do_page_fault)
 ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX)
 #else
-	bl	do_page_fault
+	bl	CFUNC(do_page_fault)
 #endif
 	b	interrupt_return_srr
 
@@ -1581,7 +1581,7 @@ EXC_COMMON_BEGIN(instruction_access_slb_common)
 BEGIN_MMU_FTR_SECTION
 	/* HPT case, do SLB fault */
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	do_slb_fault
+	bl	CFUNC(do_slb_fault)
 	cmpdi	r3,0
 	bne-	1f
 	b	fast_interrupt_return_srr
@@ -1595,7 +1595,7 @@ ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX)
 #endif
 	std	r3,RESULT(r1)
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	do_bad_segment_interrupt
+	bl	CFUNC(do_bad_segment_interrupt)
 	b	interrupt_return_srr
 
 
@@ -1649,7 +1649,7 @@ EXC_VIRT_END(hardware_interrupt, 0x4500, 0x100)
 EXC_COMMON_BEGIN(hardware_interrupt_common)
 	GEN_COMMON hardware_interrupt
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	do_IRQ
+	bl	CFUNC(do_IRQ)
 	BEGIN_FTR_SECTION
 	b	interrupt_return_hsrr
 	FTR_SECTION_ELSE
@@ -1679,7 +1679,7 @@ EXC_VIRT_END(alignment, 0x4600, 0x100)
 EXC_COMMON_BEGIN(alignment_common)
 	GEN_COMMON alignment
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	alignment_exception
+	bl	CFUNC(alignment_exception)
 	HANDLER_RESTORE_NVGPRS() /* instruction emulation may change GPRs */
 	b	interrupt_return_srr
 
@@ -1745,7 +1745,7 @@ EXC_COMMON_BEGIN(program_check_common)
 
 .Ldo_program_check:
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	program_check_exception
+	bl	CFUNC(program_check_exception)
 	HANDLER_RESTORE_NVGPRS() /* instruction emulation may change GPRs */
 	b	interrupt_return_srr
 
@@ -1777,7 +1777,7 @@ EXC_COMMON_BEGIN(fp_unavailable_common)
 	GEN_COMMON fp_unavailable
 	bne	1f			/* if from user, just load it up */
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	kernel_fp_unavailable_exception
+	bl	CFUNC(kernel_fp_unavailable_exception)
 0:	trap
 	EMIT_BUG_ENTRY 0b, __FILE__, __LINE__, 0
 1:
@@ -1790,12 +1790,12 @@ BEGIN_FTR_SECTION
 	bne-	2f
 END_FTR_SECTION_IFSET(CPU_FTR_TM)
 #endif
-	bl	load_up_fpu
+	bl	CFUNC(load_up_fpu)
 	b	fast_interrupt_return_srr
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 2:	/* User process was in a transaction */
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	fp_unavailable_tm
+	bl	CFUNC(fp_unavailable_tm)
 	b	interrupt_return_srr
 #endif
 
@@ -1839,7 +1839,7 @@ EXC_VIRT_END(decrementer, 0x4900, 0x80)
 EXC_COMMON_BEGIN(decrementer_common)
 	GEN_COMMON decrementer
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	timer_interrupt
+	bl	CFUNC(timer_interrupt)
 	b	interrupt_return_srr
 
 
@@ -1925,9 +1925,9 @@ EXC_COMMON_BEGIN(doorbell_super_common)
 	GEN_COMMON doorbell_super
 	addi	r3,r1,STACK_INT_FRAME_REGS
 #ifdef CONFIG_PPC_DOORBELL
-	bl	doorbell_exception
+	bl	CFUNC(doorbell_exception)
 #else
-	bl	unknown_async_exception
+	bl	CFUNC(unknown_async_exception)
 #endif
 	b	interrupt_return_srr
 
@@ -2091,7 +2091,7 @@ EXC_VIRT_END(single_step, 0x4d00, 0x100)
 EXC_COMMON_BEGIN(single_step_common)
 	GEN_COMMON single_step
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	single_step_exception
+	bl	CFUNC(single_step_exception)
 	b	interrupt_return_srr
 
 
@@ -2126,9 +2126,9 @@ EXC_COMMON_BEGIN(h_data_storage_common)
 	GEN_COMMON h_data_storage
 	addi    r3,r1,STACK_INT_FRAME_REGS
 BEGIN_MMU_FTR_SECTION
-	bl      do_bad_page_fault_segv
+	bl	CFUNC(do_bad_page_fault_segv)
 MMU_FTR_SECTION_ELSE
-	bl      unknown_exception
+	bl	CFUNC(unknown_exception)
 ALT_MMU_FTR_SECTION_END_IFSET(MMU_FTR_TYPE_RADIX)
 	b       interrupt_return_hsrr
 
@@ -2154,7 +2154,7 @@ EXC_VIRT_END(h_instr_storage, 0x4e20, 0x20)
 EXC_COMMON_BEGIN(h_instr_storage_common)
 	GEN_COMMON h_instr_storage
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	unknown_exception
+	bl	CFUNC(unknown_exception)
 	b	interrupt_return_hsrr
 
 
@@ -2177,7 +2177,7 @@ EXC_VIRT_END(emulation_assist, 0x4e40, 0x20)
 EXC_COMMON_BEGIN(emulation_assist_common)
 	GEN_COMMON emulation_assist
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	emulation_assist_interrupt
+	bl	CFUNC(emulation_assist_interrupt)
 	HANDLER_RESTORE_NVGPRS() /* instruction emulation may change GPRs */
 	b	interrupt_return_hsrr
 
@@ -2237,7 +2237,7 @@ EXC_COMMON_BEGIN(hmi_exception_early_common)
 	__GEN_COMMON_BODY hmi_exception_early
 
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	hmi_exception_realmode
+	bl	CFUNC(hmi_exception_realmode)
 	cmpdi	cr0,r3,0
 	bne	1f
 
@@ -2255,7 +2255,7 @@ EXC_COMMON_BEGIN(hmi_exception_early_common)
 EXC_COMMON_BEGIN(hmi_exception_common)
 	GEN_COMMON hmi_exception
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	handle_hmi_exception
+	bl	CFUNC(handle_hmi_exception)
 	b	interrupt_return_hsrr
 
 
@@ -2290,9 +2290,9 @@ EXC_COMMON_BEGIN(h_doorbell_common)
 	GEN_COMMON h_doorbell
 	addi	r3,r1,STACK_INT_FRAME_REGS
 #ifdef CONFIG_PPC_DOORBELL
-	bl	doorbell_exception
+	bl	CFUNC(doorbell_exception)
 #else
-	bl	unknown_async_exception
+	bl	CFUNC(unknown_async_exception)
 #endif
 	b	interrupt_return_hsrr
 
@@ -2325,7 +2325,7 @@ EXC_VIRT_END(h_virt_irq, 0x4ea0, 0x20)
 EXC_COMMON_BEGIN(h_virt_irq_common)
 	GEN_COMMON h_virt_irq
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	do_IRQ
+	bl	CFUNC(do_IRQ)
 	b	interrupt_return_hsrr
 
 
@@ -2374,10 +2374,10 @@ EXC_COMMON_BEGIN(performance_monitor_common)
 	lbz	r4,PACAIRQSOFTMASK(r13)
 	cmpdi	r4,IRQS_ENABLED
 	bne	1f
-	bl	performance_monitor_exception_async
+	bl	CFUNC(performance_monitor_exception_async)
 	b	interrupt_return_srr
 1:
-	bl	performance_monitor_exception_nmi
+	bl	CFUNC(performance_monitor_exception_nmi)
 	/* Clear MSR_RI before setting SRR0 and SRR1. */
 	li	r9,0
 	mtmsrd	r9,1
@@ -2421,19 +2421,19 @@ BEGIN_FTR_SECTION
 	bne-	2f
   END_FTR_SECTION_NESTED(CPU_FTR_TM, CPU_FTR_TM, 69)
 #endif
-	bl	load_up_altivec
+	bl	CFUNC(load_up_altivec)
 	b	fast_interrupt_return_srr
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 2:	/* User process was in a transaction */
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	altivec_unavailable_tm
+	bl	CFUNC(altivec_unavailable_tm)
 	b	interrupt_return_srr
 #endif
 1:
 END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
 #endif
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	altivec_unavailable_exception
+	bl	CFUNC(altivec_unavailable_exception)
 	b	interrupt_return_srr
 
 
@@ -2475,14 +2475,14 @@ BEGIN_FTR_SECTION
 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
 2:	/* User process was in a transaction */
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	vsx_unavailable_tm
+	bl	CFUNC(vsx_unavailable_tm)
 	b	interrupt_return_srr
 #endif
 1:
 END_FTR_SECTION_IFSET(CPU_FTR_VSX)
 #endif
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	vsx_unavailable_exception
+	bl	CFUNC(vsx_unavailable_exception)
 	b	interrupt_return_srr
 
 
@@ -2509,7 +2509,7 @@ EXC_VIRT_END(facility_unavailable, 0x4f60, 0x20)
 EXC_COMMON_BEGIN(facility_unavailable_common)
 	GEN_COMMON facility_unavailable
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	facility_unavailable_exception
+	bl	CFUNC(facility_unavailable_exception)
 	HANDLER_RESTORE_NVGPRS() /* instruction emulation may change GPRs */
 	b	interrupt_return_srr
 
@@ -2537,7 +2537,7 @@ EXC_VIRT_END(h_facility_unavailable, 0x4f80, 0x20)
 EXC_COMMON_BEGIN(h_facility_unavailable_common)
 	GEN_COMMON h_facility_unavailable
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	facility_unavailable_exception
+	bl	CFUNC(facility_unavailable_exception)
 	/* XXX Shouldn't be necessary in practice */
 	HANDLER_RESTORE_NVGPRS()
 	b	interrupt_return_hsrr
@@ -2568,7 +2568,7 @@ EXC_VIRT_NONE(0x5200, 0x100)
 EXC_COMMON_BEGIN(cbe_system_error_common)
 	GEN_COMMON cbe_system_error
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	cbe_system_error_exception
+	bl	CFUNC(cbe_system_error_exception)
 	b	interrupt_return_hsrr
 
 #else /* CONFIG_CBE_RAS */
@@ -2599,7 +2599,7 @@ EXC_VIRT_END(instruction_breakpoint, 0x5300, 0x100)
 EXC_COMMON_BEGIN(instruction_breakpoint_common)
 	GEN_COMMON instruction_breakpoint
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	instruction_breakpoint_exception
+	bl	CFUNC(instruction_breakpoint_exception)
 	b	interrupt_return_srr
 
 
@@ -2721,7 +2721,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_CFAR)
 EXC_COMMON_BEGIN(denorm_exception_common)
 	GEN_COMMON denorm_exception
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	unknown_exception
+	bl	CFUNC(unknown_exception)
 	b	interrupt_return_hsrr
 
 
@@ -2738,7 +2738,7 @@ EXC_VIRT_NONE(0x5600, 0x100)
 EXC_COMMON_BEGIN(cbe_maintenance_common)
 	GEN_COMMON cbe_maintenance
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	cbe_maintenance_exception
+	bl	CFUNC(cbe_maintenance_exception)
 	b	interrupt_return_hsrr
 
 #else /* CONFIG_CBE_RAS */
@@ -2764,10 +2764,10 @@ EXC_COMMON_BEGIN(altivec_assist_common)
 	GEN_COMMON altivec_assist
 	addi	r3,r1,STACK_INT_FRAME_REGS
 #ifdef CONFIG_ALTIVEC
-	bl	altivec_assist_exception
+	bl	CFUNC(altivec_assist_exception)
 	HANDLER_RESTORE_NVGPRS() /* instruction emulation may change GPRs */
 #else
-	bl	unknown_exception
+	bl	CFUNC(unknown_exception)
 #endif
 	b	interrupt_return_srr
 
@@ -2785,7 +2785,7 @@ EXC_VIRT_NONE(0x5800, 0x100)
 EXC_COMMON_BEGIN(cbe_thermal_common)
 	GEN_COMMON cbe_thermal
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	cbe_thermal_exception
+	bl	CFUNC(cbe_thermal_exception)
 	b	interrupt_return_hsrr
 
 #else /* CONFIG_CBE_RAS */
@@ -2818,7 +2818,7 @@ EXC_COMMON_BEGIN(soft_nmi_common)
 	__GEN_COMMON_BODY soft_nmi
 
 	addi	r3,r1,STACK_INT_FRAME_REGS
-	bl	soft_nmi_interrupt
+	bl	CFUNC(soft_nmi_interrupt)
 
 	/* Clear MSR_RI before setting SRR0 and SRR1. */
 	li	r9,0