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Date: Tue, 25 Feb 2020 23:47:29 +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 10/15] x86/entry: Convert various hypervisor vectors to IDTENTRY_SYSVEC
Convert various hypervisor 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 | 14 --------------
arch/x86/entry/entry_64.S | 17 -----------------
arch/x86/hyperv/hv_init.c | 3 ++-
arch/x86/include/asm/acrn.h | 11 -----------
arch/x86/include/asm/idtentry.h | 13 +++++++++++++
arch/x86/include/asm/mshyperv.h | 14 --------------
arch/x86/kernel/cpu/acrn.c | 6 +++---
arch/x86/kernel/cpu/mshyperv.c | 18 ++++++++++--------
8 files changed, 28 insertions(+), 68 deletions(-)
--- a/arch/x86/entry/entry_32.S
+++ b/arch/x86/entry/entry_32.S
@@ -1380,20 +1380,6 @@ BUILD_INTERRUPT3(xen_hvm_callback_vector
xen_evtchn_do_upcall)
#endif
-
-#if IS_ENABLED(CONFIG_HYPERV)
-
-BUILD_INTERRUPT3(hyperv_callback_vector, HYPERVISOR_CALLBACK_VECTOR,
- hyperv_vector_handler)
-
-BUILD_INTERRUPT3(hyperv_reenlightenment_vector, HYPERV_REENLIGHTENMENT_VECTOR,
- hyperv_reenlightenment_intr)
-
-BUILD_INTERRUPT3(hv_stimer0_callback_vector, HYPERV_STIMER0_VECTOR,
- hv_stimer0_vector_handler)
-
-#endif /* CONFIG_HYPERV */
-
SYM_CODE_START_LOCAL_NOALIGN(common_exception)
/* the function address is in %gs's slot on the stack */
SAVE_ALL switch_stacks=1 skip_gs=1 unwind_espfix=1
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -1130,23 +1130,6 @@ apicinterrupt3 HYPERVISOR_CALLBACK_VECTO
xen_hvm_callback_vector xen_evtchn_do_upcall
#endif
-
-#if IS_ENABLED(CONFIG_HYPERV)
-apicinterrupt3 HYPERVISOR_CALLBACK_VECTOR \
- hyperv_callback_vector hyperv_vector_handler
-
-apicinterrupt3 HYPERV_REENLIGHTENMENT_VECTOR \
- hyperv_reenlightenment_vector hyperv_reenlightenment_intr
-
-apicinterrupt3 HYPERV_STIMER0_VECTOR \
- hv_stimer0_callback_vector hv_stimer0_vector_handler
-#endif /* CONFIG_HYPERV */
-
-#if IS_ENABLED(CONFIG_ACRN_GUEST)
-apicinterrupt3 HYPERVISOR_CALLBACK_VECTOR \
- acrn_hv_callback_vector acrn_hv_vector_handler
-#endif
-
/*
* Save all registers in pt_regs, and switch gs if needed.
* Use slow, but surefire "are we in kernel?" check.
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -15,6 +15,7 @@
#include <asm/hypervisor.h>
#include <asm/hyperv-tlfs.h>
#include <asm/mshyperv.h>
+#include <asm/idtentry.h>
#include <linux/version.h>
#include <linux/vmalloc.h>
#include <linux/mm.h>
@@ -151,7 +152,7 @@ static inline bool hv_reenlightenment_av
ms_hyperv.features & HV_X64_ACCESS_REENLIGHTENMENT;
}
-__visible void __irq_entry hyperv_reenlightenment_intr(struct pt_regs *regs)
+DEFINE_IDTENTRY_SYSVEC(sysvec_hyperv_reenlightenment)
{
entering_ack_irq();
--- a/arch/x86/include/asm/acrn.h
+++ /dev/null
@@ -1,11 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_X86_ACRN_H
-#define _ASM_X86_ACRN_H
-
-extern void acrn_hv_callback_vector(void);
-#ifdef CONFIG_TRACING
-#define trace_acrn_hv_callback_vector acrn_hv_callback_vector
-#endif
-
-extern void acrn_hv_vector_handler(struct pt_regs *regs);
-#endif /* _ASM_X86_ACRN_H */
--- a/arch/x86/include/asm/idtentry.h
+++ b/arch/x86/include/asm/idtentry.h
@@ -523,6 +523,19 @@ DECLARE_IDTENTRY_SYSVEC(POSTED_INTR_WAKE
DECLARE_IDTENTRY_SYSVEC(POSTED_INTR_NESTED_VECTOR, sysvec_kvm_posted_intr_nested_ipi);
#endif
+#if IS_ENABLED(CONFIG_HYPERV)
+DECLARE_IDTENTRY_SYSVEC(HYPERVISOR_CALLBACK_VECTOR, sysvec_hyperv_callback);
+DECLARE_IDTENTRY_SYSVEC(HYPERVISOR_REENLIGHTENMENT_VECTOR, sysvec_hyperv_reenlightenment);
+DECLARE_IDTENTRY_SYSVEC(HYPERVISOR_STIMER0_VECTOR, sysvec_hyperv_stimer0);
+#ifdef CONFIG_TRACING
+#define trace_hyperv_callback_vector asm_sysvec_hyperv_callback
+#endif
+#endif
+
+#if IS_ENABLED(CONFIG_ACRN_GUEST)
+DECLARE_IDTENTRY_SYSVEC(HYPERVISOR_CALLBACK_VECTOR, sysvec_acrn_hv_callback);
+#endif
+
#ifdef CONFIG_X86_MCE
/* Machine check */
DECLARE_IDTENTRY_MCE(X86_TRAP_MC, exc_machine_check);
--- a/arch/x86/include/asm/mshyperv.h
+++ b/arch/x86/include/asm/mshyperv.h
@@ -49,24 +49,11 @@ typedef int (*hyperv_fill_flush_list_fun
((val).archdata.vclock_mode = VCLOCK_HVCLOCK)
#define hv_get_raw_timer() rdtsc_ordered()
-void hyperv_callback_vector(void);
-void hyperv_reenlightenment_vector(void);
-#ifdef CONFIG_TRACING
-#define trace_hyperv_callback_vector hyperv_callback_vector
-#endif
void hyperv_vector_handler(struct pt_regs *regs);
-/*
- * Routines for stimer0 Direct Mode handling.
- * On x86/x64, there are no percpu actions to take.
- */
-void hv_stimer0_vector_handler(struct pt_regs *regs);
-void hv_stimer0_callback_vector(void);
-
static inline void hv_enable_stimer0_percpu_irq(int irq) {}
static inline void hv_disable_stimer0_percpu_irq(int irq) {}
-
#if IS_ENABLED(CONFIG_HYPERV)
extern void *hv_hypercall_pg;
extern void __percpu **hyperv_pcpu_input_arg;
@@ -221,7 +208,6 @@ void hyperv_setup_mmu_ops(void);
void *hv_alloc_hyperv_page(void);
void *hv_alloc_hyperv_zeroed_page(void);
void hv_free_hyperv_page(unsigned long addr);
-void hyperv_reenlightenment_intr(struct pt_regs *regs);
void set_hv_tscchange_cb(void (*cb)(void));
void clear_hv_tscchange_cb(void);
void hyperv_stop_tsc_emulation(void);
--- a/arch/x86/kernel/cpu/acrn.c
+++ b/arch/x86/kernel/cpu/acrn.c
@@ -10,10 +10,10 @@
*/
#include <linux/interrupt.h>
-#include <asm/acrn.h>
#include <asm/apic.h>
#include <asm/desc.h>
#include <asm/hypervisor.h>
+#include <asm/idtentry.h>
#include <asm/irq_regs.h>
static uint32_t __init acrn_detect(void)
@@ -24,7 +24,7 @@ static uint32_t __init acrn_detect(void)
static void __init acrn_init_platform(void)
{
/* Setup the IDT for ACRN hypervisor callback */
- alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, acrn_hv_callback_vector);
+ alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, asm_sysvec_acrn_hv_callback);
}
static bool acrn_x2apic_available(void)
@@ -39,7 +39,7 @@ static bool acrn_x2apic_available(void)
static void (*acrn_intr_handler)(void);
-__visible void __irq_entry acrn_hv_vector_handler(struct pt_regs *regs)
+DEFINE_IDTENTRY_SYSVEC(sysvec_acrn_hv_callback)
{
struct pt_regs *old_regs = set_irq_regs(regs);
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -23,6 +23,7 @@
#include <asm/hyperv-tlfs.h>
#include <asm/mshyperv.h>
#include <asm/desc.h>
+#include <asm/idtentry.h>
#include <asm/irq_regs.h>
#include <asm/i8259.h>
#include <asm/apic.h>
@@ -40,7 +41,7 @@ static void (*hv_stimer0_handler)(void);
static void (*hv_kexec_handler)(void);
static void (*hv_crash_handler)(struct pt_regs *regs);
-__visible void __irq_entry hyperv_vector_handler(struct pt_regs *regs)
+DEFINE_IDTENTRY_SYSVEC(sysvec_hyperv_callback)
{
struct pt_regs *old_regs = set_irq_regs(regs);
@@ -73,8 +74,7 @@ EXPORT_SYMBOL_GPL(hv_remove_vmbus_irq);
* Routines to do per-architecture handling of stimer0
* interrupts when in Direct Mode
*/
-
-__visible void __irq_entry hv_stimer0_vector_handler(struct pt_regs *regs)
+DEFINE_IDTENTRY_SYSVEC(sysvec_hyperv_stimer0)
{
struct pt_regs *old_regs = set_irq_regs(regs);
@@ -321,17 +321,19 @@ static void __init ms_hyperv_init_platfo
x86_platform.apic_post_init = hyperv_init;
hyperv_setup_mmu_ops();
/* Setup the IDT for hypervisor callback */
- alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, hyperv_callback_vector);
+ alloc_intr_gate(HYPERVISOR_CALLBACK_VECTOR, sysvec_hyperv_callback);
/* Setup the IDT for reenlightenment notifications */
- if (ms_hyperv.features & HV_X64_ACCESS_REENLIGHTENMENT)
+ if (ms_hyperv.features & HV_X64_ACCESS_REENLIGHTENMENT) {
alloc_intr_gate(HYPERV_REENLIGHTENMENT_VECTOR,
- hyperv_reenlightenment_vector);
+ asm_sysvec_hyperv_reenlightenment);
+ }
/* Setup the IDT for stimer0 */
- if (ms_hyperv.misc_features & HV_STIMER_DIRECT_MODE_AVAILABLE)
+ if (ms_hyperv.misc_features & HV_STIMER_DIRECT_MODE_AVAILABLE) {
alloc_intr_gate(HYPERV_STIMER0_VECTOR,
- hv_stimer0_callback_vector);
+ asm_sysvec_hyperv_stimer0);
+ }
# ifdef CONFIG_SMP
smp_ops.smp_prepare_boot_cpu = hv_smp_prepare_boot_cpu;
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