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Date:   Tue, 25 Feb 2020 23:47:28 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     LKML <linux-kernel@...r.kernel.org>
Cc:     x86@...nel.org, Steven Rostedt <rostedt@...dmis.org>,
        Brian Gerst <brgerst@...il.com>,
        Juergen Gross <jgross@...e.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Arnd Bergmann <arnd@...db.de>
Subject: [patch 09/15] x86/entry: Convert KVM vectors to IDTENTRY_SYSVEC

Convert KVm specific 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 prototyoes

No functional change.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 arch/x86/entry/entry_32.S         |    3 ---
 arch/x86/entry/entry_64.S         |    7 -------
 arch/x86/include/asm/entry_arch.h |   19 -------------------
 arch/x86/include/asm/hw_irq.h     |    5 -----
 arch/x86/include/asm/idtentry.h   |    6 ++++++
 arch/x86/include/asm/irq.h        |    3 ---
 arch/x86/kernel/idt.c             |    6 +++---
 arch/x86/kernel/irq.c             |    6 +++---
 8 files changed, 12 insertions(+), 43 deletions(-)

--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -1286,9 +1286,6 @@ SYM_FUNC_END(name)
 #define BUILD_INTERRUPT(name, nr)		\
 	BUILD_INTERRUPT3(name, nr, smp_##name);	\
 
-/* The include is where all of the SMP etc. interrupts come from */
-#include <asm/entry_arch.h>
-
 #ifdef CONFIG_PARAVIRT
 SYM_CODE_START(native_iret)
 	iret
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -994,13 +994,6 @@ apicinterrupt3 \num \sym \do_sym
 POP_SECTION_IRQENTRY
 .endm
 
-
-#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
-apicinterrupt3 POSTED_INTR_NESTED_VECTOR	kvm_posted_intr_nested_ipi	smp_kvm_posted_intr_nested_ipi
-#endif
-
 /*
  * Reload gs selector with exception handling
  * edi:  new selector
--- a/arch/x86/include/asm/entry_arch.h
+++ /dev/null
@@ -1,19 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * This file is designed to contain the BUILD_INTERRUPT specifications for
- * all of the extra named interrupt vectors used by the architecture.
- * Usually this is the Inter Process Interrupts (IPIs)
- */
-
-/*
- * The following vectors are part of the Linux architecture, there
- * is no hardware IRQ pin equivalent for them, they are triggered
- * through the ICC by us (IPIs)
- */
-
-#ifdef CONFIG_HAVE_KVM
-BUILD_INTERRUPT(kvm_posted_intr_ipi, POSTED_INTR_VECTOR)
-BUILD_INTERRUPT(kvm_posted_intr_wakeup_ipi, POSTED_INTR_WAKEUP_VECTOR)
-BUILD_INTERRUPT(kvm_posted_intr_nested_ipi, POSTED_INTR_NESTED_VECTOR)
-#endif
-
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -28,11 +28,6 @@
 #include <asm/irq.h>
 #include <asm/sections.h>
 
-/* Interrupt handlers registered during init_IRQ */
-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);
-
 #ifdef	CONFIG_X86_LOCAL_APIC
 struct irq_data;
 struct pci_dev;
--- a/arch/x86/include/asm/idtentry.h
+++ b/arch/x86/include/asm/idtentry.h
@@ -517,6 +517,12 @@ DECLARE_IDTENTRY_SYSVEC(THERMAL_APIC_VEC
 DECLARE_IDTENTRY_SYSVEC(IRQ_WORK_VECTOR,		sysvec_irq_work);
 #endif
 
+#ifdef CONFIG_HAVE_KVM
+DECLARE_IDTENTRY_SYSVEC(POSTED_INTR_VECTOR,		sysvec_kvm_posted_intr_ipi);
+DECLARE_IDTENTRY_SYSVEC(POSTED_INTR_WAKEUP_VECTOR,	sysvec_kvm_posted_intr_wakeup_ipi);
+DECLARE_IDTENTRY_SYSVEC(POSTED_INTR_NESTED_VECTOR,	sysvec_kvm_posted_intr_nested_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
@@ -26,9 +26,6 @@ extern void fixup_irqs(void);
 
 #ifdef CONFIG_HAVE_KVM
 extern void kvm_set_posted_intr_wakeup_handler(void (*handler)(void));
-extern __visible void smp_kvm_posted_intr_ipi(struct pt_regs *regs);
-extern __visible void smp_kvm_posted_intr_wakeup_ipi(struct pt_regs *regs);
-extern __visible void smp_kvm_posted_intr_nested_ipi(struct pt_regs *regs);
 #endif
 
 extern void (*x86_platform_ipi_callback)(void);
--- a/arch/x86/kernel/idt.c
+++ b/arch/x86/kernel/idt.c
@@ -132,9 +132,9 @@ static const __initconst struct idt_data
 	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),
-	INTG(POSTED_INTR_NESTED_VECTOR,		kvm_posted_intr_nested_ipi),
+	INTG(POSTED_INTR_VECTOR,		asm_sysvec_kvm_posted_intr_ipi),
+	INTG(POSTED_INTR_WAKEUP_VECTOR,		asm_sysvec_kvm_posted_intr_wakeup_ipi),
+	INTG(POSTED_INTR_NESTED_VECTOR,		asm_sysvec_kvm_posted_intr_nested_ipi),
 # endif
 # ifdef CONFIG_IRQ_WORK
 	INTG(IRQ_WORK_VECTOR,			asm_sysvec_irq_work),
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -301,7 +301,7 @@ EXPORT_SYMBOL_GPL(kvm_set_posted_intr_wa
 /*
  * Handler for POSTED_INTERRUPT_VECTOR.
  */
-__visible void smp_kvm_posted_intr_ipi(struct pt_regs *regs)
+DEFINE_IDTENTRY_SYSVEC(sysvec_kvm_posted_intr_ipi)
 {
 	struct pt_regs *old_regs = set_irq_regs(regs);
 
@@ -314,7 +314,7 @@ EXPORT_SYMBOL_GPL(kvm_set_posted_intr_wa
 /*
  * Handler for POSTED_INTERRUPT_WAKEUP_VECTOR.
  */
-__visible void smp_kvm_posted_intr_wakeup_ipi(struct pt_regs *regs)
+DEFINE_IDTENTRY_SYSVEC(sysvec_kvm_posted_intr_wakeup_ipi)
 {
 	struct pt_regs *old_regs = set_irq_regs(regs);
 
@@ -328,7 +328,7 @@ EXPORT_SYMBOL_GPL(kvm_set_posted_intr_wa
 /*
  * Handler for POSTED_INTERRUPT_NESTED_VECTOR.
  */
-__visible void smp_kvm_posted_intr_nested_ipi(struct pt_regs *regs)
+DEFINE_IDTENTRY_SYSVEC(sysvec_kvm_posted_intr_nested_ipi)
 {
 	struct pt_regs *old_regs = set_irq_regs(regs);

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