x86/entry: Convert SMP system vectors to IDTENTRY_SYSVEC

Convert SMP system vectors to IDTENTRY_SYSVEC:

  - Implement the C entry point with DEFINE_IDTENTRY_SYSVEC
  - Emit the ASM stub with DECLARE_IDTENTRY_SYSVEC
  - Remove the ASM idtentries in 64-bit
  - Remove the BUILD_INTERRUPT entries in 32-bit
  - Remove the old prototypes

No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20200521202119.372234635@linutronix.de

arch/x86/entry/entry_64.S

@@ -956,11 +956,6 @@ apicinterrupt3 \num \sym \do_sym
 POP_SECTION_IRQENTRY
 .endm
 
-#ifdef CONFIG_SMP
-apicinterrupt3 IRQ_MOVE_CLEANUP_VECTOR		irq_move_cleanup_interrupt	smp_irq_move_cleanup_interrupt
-apicinterrupt3 REBOOT_VECTOR			reboot_interrupt		smp_reboot_interrupt
-#endif
-
 #ifdef CONFIG_X86_UV
 apicinterrupt3 UV_BAU_MESSAGE			uv_bau_message_intr1		uv_bau_message_interrupt
 #endif
@@ -984,8 +979,6 @@ apicinterrupt THERMAL_APIC_VECTOR		thermal_interrupt		smp_thermal_interrupt
 #endif
 
 #ifdef CONFIG_SMP
-apicinterrupt CALL_FUNCTION_SINGLE_VECTOR	call_function_single_interrupt	smp_call_function_single_interrupt
-apicinterrupt CALL_FUNCTION_VECTOR		call_function_interrupt		smp_call_function_interrupt
 apicinterrupt RESCHEDULE_VECTOR			reschedule_interrupt		smp_reschedule_interrupt
 #endif
 

arch/x86/include/asm/entry_arch.h

@@ -12,10 +12,6 @@
  */
 #ifdef CONFIG_SMP
 BUILD_INTERRUPT(reschedule_interrupt,RESCHEDULE_VECTOR)
-BUILD_INTERRUPT(call_function_interrupt,CALL_FUNCTION_VECTOR)
-BUILD_INTERRUPT(call_function_single_interrupt,CALL_FUNCTION_SINGLE_VECTOR)
-BUILD_INTERRUPT(irq_move_cleanup_interrupt, IRQ_MOVE_CLEANUP_VECTOR)
-BUILD_INTERRUPT(reboot_interrupt, REBOOT_VECTOR)
 #endif
 
 #ifdef CONFIG_HAVE_KVM

arch/x86/include/asm/hw_irq.h

@@ -38,14 +38,9 @@ extern asmlinkage void uv_bau_message_intr1(void);
 extern asmlinkage void thermal_interrupt(void);
 extern asmlinkage void reschedule_interrupt(void);
 
-extern asmlinkage void irq_move_cleanup_interrupt(void);
-extern asmlinkage void reboot_interrupt(void);
 extern asmlinkage void threshold_interrupt(void);
 extern asmlinkage void deferred_error_interrupt(void);
 
-extern asmlinkage void call_function_interrupt(void);
-extern asmlinkage void call_function_single_interrupt(void);
-
 #ifdef	CONFIG_X86_LOCAL_APIC
 struct irq_data;
 struct pci_dev;

arch/x86/include/asm/idtentry.h

@@ -599,6 +599,13 @@ DECLARE_IDTENTRY_SYSVEC(LOCAL_TIMER_VECTOR,		sysvec_apic_timer_interrupt);
 DECLARE_IDTENTRY_SYSVEC(X86_PLATFORM_IPI_VECTOR,	sysvec_x86_platform_ipi);
 #endif
 
+#ifdef CONFIG_SMP
+DECLARE_IDTENTRY_SYSVEC(IRQ_MOVE_CLEANUP_VECTOR,	sysvec_irq_move_cleanup);
+DECLARE_IDTENTRY_SYSVEC(REBOOT_VECTOR,			sysvec_reboot);
+DECLARE_IDTENTRY_SYSVEC(CALL_FUNCTION_SINGLE_VECTOR,	sysvec_call_function_single);
+DECLARE_IDTENTRY_SYSVEC(CALL_FUNCTION_VECTOR,		sysvec_call_function);
+#endif
+
 #undef X86_TRAP_OTHER
 
 #endif

arch/x86/include/asm/traps.h

@@ -40,8 +40,6 @@ asmlinkage void smp_threshold_interrupt(struct pt_regs *regs);
 asmlinkage void smp_deferred_error_interrupt(struct pt_regs *regs);
 #endif
 
-asmlinkage void smp_irq_move_cleanup_interrupt(void);
-
 #ifdef CONFIG_VMAP_STACK
 void __noreturn handle_stack_overflow(const char *message,
 				      struct pt_regs *regs,

arch/x86/kernel/apic/vector.c

@@ -861,13 +861,13 @@ static void free_moved_vector(struct apic_chip_data *apicd)
 	apicd->move_in_progress = 0;
 }
 
-asmlinkage __visible void __irq_entry smp_irq_move_cleanup_interrupt(void)
+DEFINE_IDTENTRY_SYSVEC(sysvec_irq_move_cleanup)
 {
 	struct hlist_head *clhead = this_cpu_ptr(&cleanup_list);
 	struct apic_chip_data *apicd;
 	struct hlist_node *tmp;
 
-	entering_ack_irq();
+	ack_APIC_irq();
 	/* Prevent vectors vanishing under us */
 	raw_spin_lock(&vector_lock);
 
@@ -892,7 +892,6 @@ asmlinkage __visible void __irq_entry smp_irq_move_cleanup_interrupt(void)
 	}
 
 	raw_spin_unlock(&vector_lock);
-	exiting_irq();
 }
 
 static void __send_cleanup_vector(struct apic_chip_data *apicd)

arch/x86/kernel/idt.c

@@ -112,11 +112,11 @@ static const __initconst struct idt_data def_idts[] = {
  */
 static const __initconst struct idt_data apic_idts[] = {
 #ifdef CONFIG_SMP
-	INTG(RESCHEDULE_VECTOR,		reschedule_interrupt),
-	INTG(CALL_FUNCTION_VECTOR,	call_function_interrupt),
-	INTG(CALL_FUNCTION_SINGLE_VECTOR, call_function_single_interrupt),
-	INTG(IRQ_MOVE_CLEANUP_VECTOR,	irq_move_cleanup_interrupt),
-	INTG(REBOOT_VECTOR,		reboot_interrupt),
+	INTG(RESCHEDULE_VECTOR,			reschedule_interrupt),
+	INTG(CALL_FUNCTION_VECTOR,		asm_sysvec_call_function),
+	INTG(CALL_FUNCTION_SINGLE_VECTOR,	asm_sysvec_call_function_single),
+	INTG(IRQ_MOVE_CLEANUP_VECTOR,		asm_sysvec_irq_move_cleanup),
+	INTG(REBOOT_VECTOR,			asm_sysvec_reboot),
 #endif
 
 #ifdef CONFIG_X86_THERMAL_VECTOR

arch/x86/kernel/smp.c

@@ -27,6 +27,7 @@
 #include <asm/mmu_context.h>
 #include <asm/proto.h>
 #include <asm/apic.h>
+#include <asm/idtentry.h>
 #include <asm/nmi.h>
 #include <asm/mce.h>
 #include <asm/trace/irq_vectors.h>
@@ -130,13 +131,11 @@ static int smp_stop_nmi_callback(unsigned int val, struct pt_regs *regs)
 /*
  * this function calls the 'stop' function on all other CPUs in the system.
  */
-
-asmlinkage __visible void smp_reboot_interrupt(void)
+DEFINE_IDTENTRY_SYSVEC(sysvec_reboot)
 {
-	ipi_entering_ack_irq();
+	ack_APIC_irq();
 	cpu_emergency_vmxoff();
 	stop_this_cpu(NULL);
-	irq_exit();
 }
 
 static int register_stop_handler(void)
@@ -227,7 +226,6 @@ __visible void __irq_entry smp_reschedule_interrupt(struct pt_regs *regs)
 {
 	ack_APIC_irq();
 	inc_irq_stat(irq_resched_count);
-	kvm_set_cpu_l1tf_flush_l1d();
 
 	if (trace_resched_ipi_enabled()) {
 		/*
@@ -244,24 +242,22 @@ __visible void __irq_entry smp_reschedule_interrupt(struct pt_regs *regs)
 	scheduler_ipi();
 }
 
-__visible void __irq_entry smp_call_function_interrupt(struct pt_regs *regs)
+DEFINE_IDTENTRY_SYSVEC(sysvec_call_function)
 {
-	ipi_entering_ack_irq();
+	ack_APIC_irq();
 	trace_call_function_entry(CALL_FUNCTION_VECTOR);
 	inc_irq_stat(irq_call_count);
 	generic_smp_call_function_interrupt();
 	trace_call_function_exit(CALL_FUNCTION_VECTOR);
-	exiting_irq();
 }
 
-__visible void __irq_entry smp_call_function_single_interrupt(struct pt_regs *r)
+DEFINE_IDTENTRY_SYSVEC(sysvec_call_function_single)
 {
-	ipi_entering_ack_irq();
+	ack_APIC_irq();
 	trace_call_function_single_entry(CALL_FUNCTION_SINGLE_VECTOR);
 	inc_irq_stat(irq_call_count);
 	generic_smp_call_function_single_interrupt();
 	trace_call_function_single_exit(CALL_FUNCTION_SINGLE_VECTOR);
-	exiting_irq();
 }
 
 static int __init nonmi_ipi_setup(char *str)