[patch V6 25/37] x86/entry: Convert SMP system vectors to IDTENTRY_SYSVEC

From: Thomas Gleixner
Date: Fri May 15 2020 - 20:11:13 EST


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 64bit
- Remove the BUILD_INTERRUPT entries in 32bit
- Remove the old prototypes

No functional change.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>


diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S
index 6e629e5d5047..c1a47d37f29e 100644
--- a/arch/x86/entry/entry_64.S
+++ b/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

diff --git a/arch/x86/include/asm/entry_arch.h b/arch/x86/include/asm/entry_arch.h
index d10d6d807e73..2e2055bcfeb2 100644
--- a/arch/x86/include/asm/entry_arch.h
+++ b/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
diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index 1765993360e7..36a38695f27f 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/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;
diff --git a/arch/x86/include/asm/idtentry.h b/arch/x86/include/asm/idtentry.h
index 6154d1e75fce..20e47b8d4024 100644
--- a/arch/x86/include/asm/idtentry.h
+++ b/arch/x86/include/asm/idtentry.h
@@ -575,6 +575,13 @@ 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
diff --git a/arch/x86/include/asm/traps.h b/arch/x86/include/asm/traps.h
index 933934c3e173..0c40f37f8cb7 100644
--- a/arch/x86/include/asm/traps.h
+++ b/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,
diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c
index 67768e54438b..c48be6e1f676 100644
--- a/arch/x86/kernel/apic/vector.c
+++ b/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)
diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c
index 7e38af51480d..95abcd52e5be 100644
--- a/arch/x86/kernel/idt.c
+++ b/arch/x86/kernel/idt.c
@@ -109,11 +109,11 @@ 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
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index b8d4e9c3c070..e5647daa7e96 100644
--- a/arch/x86/kernel/smp.c
+++ b/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)