[patch 06/15] x86/entry: Convert APIC interrupts to IDTENTRY_SYSVEC

From: Thomas Gleixner
Date: Tue Feb 25 2020 - 18:27:09 EST

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Convert APIC interrupts 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 prototyoes

No functional change.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
arch/x86/entry/entry_64.S | 6 ------
arch/x86/include/asm/entry_arch.h | 5 -----
arch/x86/include/asm/hw_irq.h | 3 ---
arch/x86/include/asm/idtentry.h | 8 ++++++++
arch/x86/include/asm/irq.h | 1 -
arch/x86/include/asm/traps.h | 3 ---
arch/x86/kernel/apic/apic.c | 8 ++++----
arch/x86/kernel/idt.c | 8 ++++----
arch/x86/kernel/irq.c | 3 ++-
9 files changed, 18 insertions(+), 27 deletions(-)

--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -1003,9 +1003,6 @@ apicinterrupt3 REBOOT_VECTOR reboot_in
apicinterrupt3 UV_BAU_MESSAGE uv_bau_message_intr1 uv_bau_message_interrupt
#endif

-apicinterrupt LOCAL_TIMER_VECTOR apic_timer_interrupt smp_apic_timer_interrupt
-apicinterrupt X86_PLATFORM_IPI_VECTOR x86_platform_ipi smp_x86_platform_ipi
-
#ifdef CONFIG_HAVE_KVM
apicinterrupt3 POSTED_INTR_VECTOR kvm_posted_intr_ipi smp_kvm_posted_intr_ipi
apicinterrupt3 POSTED_INTR_WAKEUP_VECTOR kvm_posted_intr_wakeup_ipi smp_kvm_posted_intr_wakeup_ipi
@@ -1030,9 +1027,6 @@ apicinterrupt CALL_FUNCTION_VECTOR call
apicinterrupt RESCHEDULE_VECTOR reschedule_interrupt smp_reschedule_interrupt
#endif

-apicinterrupt ERROR_APIC_VECTOR error_interrupt smp_error_interrupt
-apicinterrupt SPURIOUS_APIC_VECTOR spurious_apic_interrupt smp_spurious_apic_interrupt
-
#ifdef CONFIG_IRQ_WORK
apicinterrupt IRQ_WORK_VECTOR irq_work_interrupt smp_irq_work_interrupt
#endif
--- a/arch/x86/include/asm/entry_arch.h
+++ b/arch/x86/include/asm/entry_arch.h
@@ -33,11 +33,6 @@ BUILD_INTERRUPT(kvm_posted_intr_nested_i
*/
#ifdef CONFIG_X86_LOCAL_APIC

-BUILD_INTERRUPT(apic_timer_interrupt,LOCAL_TIMER_VECTOR)
-BUILD_INTERRUPT(error_interrupt,ERROR_APIC_VECTOR)
-BUILD_INTERRUPT(spurious_apic_interrupt,SPURIOUS_APIC_VECTOR)
-BUILD_INTERRUPT(x86_platform_ipi, X86_PLATFORM_IPI_VECTOR)
-
#ifdef CONFIG_IRQ_WORK
BUILD_INTERRUPT(irq_work_interrupt, IRQ_WORK_VECTOR)
#endif
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -29,12 +29,9 @@
#include <asm/sections.h>

/* Interrupt handlers registered during init_IRQ */
-extern asmlinkage void apic_timer_interrupt(void);
-extern asmlinkage void x86_platform_ipi(void);
extern asmlinkage void kvm_posted_intr_ipi(void);
extern asmlinkage void kvm_posted_intr_wakeup_ipi(void);
extern asmlinkage void kvm_posted_intr_nested_ipi(void);
-extern asmlinkage void error_interrupt(void);
extern asmlinkage void irq_work_interrupt(void);
extern asmlinkage void uv_bau_message_intr1(void);

--- a/arch/x86/include/asm/idtentry.h
+++ b/arch/x86/include/asm/idtentry.h
@@ -479,6 +479,14 @@ DECLARE_IDTENTRY_CR2(X86_TRAP_PF, exc_as
DECLARE_IDTENTRY_IRQ(X6_TRAP_OTHER, common_interrupt);
DECLARE_IDTENTRY_IRQ(X6_TRAP_OTHER, spurious_interrupt);

+/* System vector entry points */
+#ifdef CONFIG_X86_LOCAL_APIC
+DECLARE_IDTENTRY_SYSVEC(ERROR_APIC_VECTOR, sysvec_error_interrupt);
+DECLARE_IDTENTRY_SYSVEC(SPURIOUS_APIC_VECTOR, sysvec_spurious_apic_interrupt);
+DECLARE_IDTENTRY_SYSVEC(LOCAL_TIMER_VECTOR, sysvec_apic_timer_interrupt);
+DECLARE_IDTENTRY_SYSVEC(X86_PLATFORM_IPI_VECTOR, sysvec_x86_platform_ipi);
+#endif
+
#ifdef CONFIG_X86_MCE
/* Machine check */
DECLARE_IDTENTRY_MCE(X86_TRAP_MC, exc_machine_check);
--- a/arch/x86/include/asm/irq.h
+++ b/arch/x86/include/asm/irq.h
@@ -44,7 +44,6 @@ extern void __init init_IRQ(void);
void arch_trigger_cpumask_backtrace(const struct cpumask *mask,
bool exclude_self);

-extern __visible void smp_x86_platform_ipi(struct pt_regs *regs);
#define arch_trigger_cpumask_backtrace arch_trigger_cpumask_backtrace
#endif

--- a/arch/x86/include/asm/traps.h
+++ b/arch/x86/include/asm/traps.h
@@ -38,9 +38,6 @@ asmlinkage void smp_threshold_interrupt(
asmlinkage void smp_deferred_error_interrupt(struct pt_regs *regs);
#endif

-void smp_apic_timer_interrupt(struct pt_regs *regs);
-void smp_error_interrupt(struct pt_regs *regs);
-void smp_spurious_apic_interrupt(struct pt_regs *regs);
asmlinkage void smp_irq_move_cleanup_interrupt(void);

extern void ist_enter(struct pt_regs *regs);
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1127,7 +1127,7 @@ static void local_apic_timer_interrupt(v
* [ if a single-CPU system runs an SMP kernel then we call the local
* interrupt as well. Thus we cannot inline the local irq ... ]
*/
-__visible void __irq_entry smp_apic_timer_interrupt(struct pt_regs *regs)
+DEFINE_IDTENTRY_SYSVEC(sysvec_apic_timer_interrupt)
{
struct pt_regs *old_regs = set_irq_regs(regs);

@@ -2167,7 +2167,7 @@ void __init register_lapic_address(unsig
* trigger on an entry which is routed to the common_spurious idtentry
* point.
*
- * Also called from smp_spurious_apic_interrupt().
+ * Also called from sysvec_spurious_apic_interrupt().
*/
DEFINE_IDTENTRY_IRQ(spurious_interrupt)
{
@@ -2206,7 +2206,7 @@ DEFINE_IDTENTRY_IRQ(spurious_interrupt)
exiting_irq();
}

-__visible void smp_spurious_apic_interrupt(struct pt_regs *regs)
+DEFINE_IDTENTRY_SYSVEC(sysvec_spurious_apic_interrupt)
{
__spurious_interrupt(regs, SPURIOUS_APIC_VECTOR);
}
@@ -2214,7 +2214,7 @@ DEFINE_IDTENTRY_IRQ(spurious_interrupt)
/*
* This interrupt should never happen with our APIC/SMP architecture
*/
-__visible void __irq_entry smp_error_interrupt(struct pt_regs *regs)
+DEFINE_IDTENTRY_SYSVEC(sysvec_error_interrupt)
{
static const char * const error_interrupt_reason[] = {
"Send CS error", /* APIC Error Bit 0 */
--- a/arch/x86/kernel/idt.c
+++ b/arch/x86/kernel/idt.c
@@ -129,8 +129,8 @@ static const __initconst struct idt_data
#endif

#ifdef CONFIG_X86_LOCAL_APIC
- INTG(LOCAL_TIMER_VECTOR, apic_timer_interrupt),
- INTG(X86_PLATFORM_IPI_VECTOR, x86_platform_ipi),
+ INTG(LOCAL_TIMER_VECTOR, asm_sysvec_apic_timer_interrupt),
+ INTG(X86_PLATFORM_IPI_VECTOR, asm_sysvec_x86_platform_ipi),
# ifdef CONFIG_HAVE_KVM
INTG(POSTED_INTR_VECTOR, kvm_posted_intr_ipi),
INTG(POSTED_INTR_WAKEUP_VECTOR, kvm_posted_intr_wakeup_ipi),
@@ -142,8 +142,8 @@ static const __initconst struct idt_data
#ifdef CONFIG_X86_UV
INTG(UV_BAU_MESSAGE, uv_bau_message_intr1),
#endif
- INTG(SPURIOUS_APIC_VECTOR, spurious_apic_interrupt),
- INTG(ERROR_APIC_VECTOR, error_interrupt),
+ INTG(SPURIOUS_APIC_VECTOR, asm_sysvec_spurious_apic_interrupt),
+ INTG(ERROR_APIC_VECTOR, asm_sysvec_error_interrupt),
#endif
};

--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -14,6 +14,7 @@
#include <linux/irq.h>

#include <asm/apic.h>
+#include <asm/traps.h>
#include <asm/io_apic.h>
#include <asm/irq.h>
#include <asm/mce.h>
@@ -269,7 +270,7 @@ void (*x86_platform_ipi_callback)(void)
/*
* Handler for X86_PLATFORM_IPI_VECTOR.
*/
-__visible void __irq_entry smp_x86_platform_ipi(struct pt_regs *regs)
+DEFINE_IDTENTRY_SYSVEC(sysvec_x86_platform_ipi)
{
struct pt_regs *old_regs = set_irq_regs(regs);

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