[tip: x86/apic] x86/apic: Nuke ack_APIC_irq()

From: tip-bot2 for Dave Hansen
Date: Wed Aug 09 2023 - 16:36:42 EST

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The following commit has been merged into the x86/apic branch of tip:

Commit-ID: 670c04add6e1a22de7c59e282c138ddcf6c9e5a2
Gitweb: https://git.kernel.org/tip/670c04add6e1a22de7c59e282c138ddcf6c9e5a2
Author: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
AuthorDate: Wed, 09 Aug 2023 08:16:46 -07:00
Committer: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
CommitterDate: Wed, 09 Aug 2023 11:58:34 -07:00

x86/apic: Nuke ack_APIC_irq()

Yet another wrapper of a wrapper gone along with the outdated comment
that this compiles to a single instruction.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Reviewed-by: Wei Liu <wei.liu@xxxxxxxxxx>
Acked-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Tested-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
Tested-by: Sohil Mehta <sohil.mehta@xxxxxxxxx>
Tested-by: Juergen Gross <jgross@xxxxxxxx> # Xen PV (dom0 and unpriv. guest)
---
arch/x86/hyperv/hv_init.c | 2 +-
arch/x86/include/asm/apic.h | 10 ----------
arch/x86/kernel/apic/apic.c | 10 +++++-----
arch/x86/kernel/apic/io_apic.c | 4 ++--
arch/x86/kernel/apic/vector.c | 2 +-
arch/x86/kernel/cpu/acrn.c | 2 +-
arch/x86/kernel/cpu/mce/amd.c | 2 +-
arch/x86/kernel/cpu/mce/threshold.c | 2 +-
arch/x86/kernel/cpu/mshyperv.c | 4 ++--
arch/x86/kernel/irq.c | 14 +++++++-------
arch/x86/kernel/irq_work.c | 2 +-
arch/x86/kernel/kvm.c | 2 +-
arch/x86/kernel/smp.c | 8 ++++----
arch/x86/xen/enlighten_hvm.c | 2 +-
14 files changed, 28 insertions(+), 38 deletions(-)

diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index 6c04b52..fc56fc8 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -161,7 +161,7 @@ static inline bool hv_reenlightenment_available(void)

DEFINE_IDTENTRY_SYSVEC(sysvec_hyperv_reenlightenment)
{
- ack_APIC_irq();
+ apic_eoi();
inc_irq_stat(irq_hv_reenlightenment_count);
schedule_delayed_work(&hv_reenlightenment_work, HZ/10);
}
diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index 790f15d..6ad3574 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -402,16 +402,6 @@ static inline void apic_set_eoi_cb(void (*eoi)(void)) {}

extern void apic_ack_irq(struct irq_data *data);

-static inline void ack_APIC_irq(void)
-{
- /*
- * ack_APIC_irq() actually gets compiled as a single instruction
- * ... yummie.
- */
- apic_eoi();
-}
-
-
static inline bool lapic_vector_set_in_irr(unsigned int vector)
{
u32 irr = apic_read(APIC_IRR + (vector / 32 * 0x10));
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 33d5ed6..b8b801e 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1076,7 +1076,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_apic_timer_interrupt)
{
struct pt_regs *old_regs = set_irq_regs(regs);

- ack_APIC_irq();
+ apic_eoi();
trace_local_timer_entry(LOCAL_TIMER_VECTOR);
local_apic_timer_interrupt();
trace_local_timer_exit(LOCAL_TIMER_VECTOR);
@@ -1480,7 +1480,7 @@ static bool apic_check_and_ack(union apic_ir *irr, union apic_ir *isr)
* per set bit.
*/
for_each_set_bit(bit, isr->map, APIC_IR_BITS)
- ack_APIC_irq();
+ apic_eoi();
return true;
}

@@ -1492,7 +1492,7 @@ static bool apic_check_and_ack(union apic_ir *irr, union apic_ir *isr)
* interrupt from previous kernel might still have ISR bit set.
*
* Most probably by now the CPU has serviced that pending interrupt and it
- * might not have done the ack_APIC_irq() because it thought, interrupt
+ * might not have done the apic_eoi() because it thought, interrupt
* came from i8259 as ExtInt. LAPIC did not get EOI so it does not clear
* the ISR bit and cpu thinks it has already serviced the interrupt. Hence
* a vector might get locked. It was noticed for timer irq (vector
@@ -2147,7 +2147,7 @@ static noinline void handle_spurious_interrupt(u8 vector)
if (v & (1 << (vector & 0x1f))) {
pr_info("Spurious interrupt (vector 0x%02x) on CPU#%d. Acked\n",
vector, smp_processor_id());
- ack_APIC_irq();
+ apic_eoi();
} else {
pr_info("Spurious interrupt (vector 0x%02x) on CPU#%d. Not pending!\n",
vector, smp_processor_id());
@@ -2198,7 +2198,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_error_interrupt)
if (lapic_get_maxlvt() > 3) /* Due to the Pentium erratum 3AP. */
apic_write(APIC_ESR, 0);
v = apic_read(APIC_ESR);
- ack_APIC_irq();
+ apic_eoi();
atomic_inc(&irq_err_count);

apic_printk(APIC_DEBUG, KERN_DEBUG "APIC error on CPU%d: %02x",
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index ff2d27e..00da6cf 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1823,7 +1823,7 @@ static void ioapic_ack_level(struct irq_data *irq_data)
* We must acknowledge the irq before we move it or the acknowledge will
* not propagate properly.
*/
- ack_APIC_irq();
+ apic_eoi();

/*
* Tail end of clearing remote IRR bit (either by delivering the EOI
@@ -2046,7 +2046,7 @@ static void unmask_lapic_irq(struct irq_data *data)

static void ack_lapic_irq(struct irq_data *data)
{
- ack_APIC_irq();
+ apic_eoi();
}

static struct irq_chip lapic_chip __read_mostly = {
diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c
index 2ee3f5a..4a262c6 100644
--- a/arch/x86/kernel/apic/vector.c
+++ b/arch/x86/kernel/apic/vector.c
@@ -907,7 +907,7 @@ static int apic_retrigger_irq(struct irq_data *irqd)
void apic_ack_irq(struct irq_data *irqd)
{
irq_move_irq(irqd);
- ack_APIC_irq();
+ apic_eoi();
}

void apic_ack_edge(struct irq_data *irqd)
diff --git a/arch/x86/kernel/cpu/acrn.c b/arch/x86/kernel/cpu/acrn.c
index 485441b..bfeb18f 100644
--- a/arch/x86/kernel/cpu/acrn.c
+++ b/arch/x86/kernel/cpu/acrn.c
@@ -51,7 +51,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_acrn_hv_callback)
* will block the interrupt whose vector is lower than
* HYPERVISOR_CALLBACK_VECTOR.
*/
- ack_APIC_irq();
+ apic_eoi();
inc_irq_stat(irq_hv_callback_count);

if (acrn_intr_handler)
diff --git a/arch/x86/kernel/cpu/mce/amd.c b/arch/x86/kernel/cpu/mce/amd.c
index c4ec4ca..c267f43 100644
--- a/arch/x86/kernel/cpu/mce/amd.c
+++ b/arch/x86/kernel/cpu/mce/amd.c
@@ -759,7 +759,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_deferred_error)
inc_irq_stat(irq_deferred_error_count);
deferred_error_int_vector();
trace_deferred_error_apic_exit(DEFERRED_ERROR_VECTOR);
- ack_APIC_irq();
+ apic_eoi();
}

/*
diff --git a/arch/x86/kernel/cpu/mce/threshold.c b/arch/x86/kernel/cpu/mce/threshold.c
index 6a059a0..ef4e7bb 100644
--- a/arch/x86/kernel/cpu/mce/threshold.c
+++ b/arch/x86/kernel/cpu/mce/threshold.c
@@ -27,5 +27,5 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_threshold)
inc_irq_stat(irq_threshold_count);
mce_threshold_vector();
trace_threshold_apic_exit(THRESHOLD_APIC_VECTOR);
- ack_APIC_irq();
+ apic_eoi();
}
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index c7969e8..0100468 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -119,7 +119,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_hyperv_callback)
vmbus_handler();

if (ms_hyperv.hints & HV_DEPRECATING_AEOI_RECOMMENDED)
- ack_APIC_irq();
+ apic_eoi();

set_irq_regs(old_regs);
}
@@ -147,7 +147,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_hyperv_stimer0)
if (hv_stimer0_handler)
hv_stimer0_handler();
add_interrupt_randomness(HYPERV_STIMER0_VECTOR);
- ack_APIC_irq();
+ apic_eoi();

set_irq_regs(old_regs);
}
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index 9f668d2..11761c1 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -49,7 +49,7 @@ void ack_bad_irq(unsigned int irq)
* completely.
* But only ack when the APIC is enabled -AK
*/
- ack_APIC_irq();
+ apic_eoi();
}

#define irq_stats(x) (&per_cpu(irq_stat, x))
@@ -256,7 +256,7 @@ DEFINE_IDTENTRY_IRQ(common_interrupt)
if (likely(!IS_ERR_OR_NULL(desc))) {
handle_irq(desc, regs);
} else {
- ack_APIC_irq();
+ apic_eoi();

if (desc == VECTOR_UNUSED) {
pr_emerg_ratelimited("%s: %d.%u No irq handler for vector\n",
@@ -280,7 +280,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_x86_platform_ipi)
{
struct pt_regs *old_regs = set_irq_regs(regs);

- ack_APIC_irq();
+ apic_eoi();
trace_x86_platform_ipi_entry(X86_PLATFORM_IPI_VECTOR);
inc_irq_stat(x86_platform_ipis);
if (x86_platform_ipi_callback)
@@ -310,7 +310,7 @@ EXPORT_SYMBOL_GPL(kvm_set_posted_intr_wakeup_handler);
*/
DEFINE_IDTENTRY_SYSVEC_SIMPLE(sysvec_kvm_posted_intr_ipi)
{
- ack_APIC_irq();
+ apic_eoi();
inc_irq_stat(kvm_posted_intr_ipis);
}

@@ -319,7 +319,7 @@ DEFINE_IDTENTRY_SYSVEC_SIMPLE(sysvec_kvm_posted_intr_ipi)
*/
DEFINE_IDTENTRY_SYSVEC(sysvec_kvm_posted_intr_wakeup_ipi)
{
- ack_APIC_irq();
+ apic_eoi();
inc_irq_stat(kvm_posted_intr_wakeup_ipis);
kvm_posted_intr_wakeup_handler();
}
@@ -329,7 +329,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_kvm_posted_intr_wakeup_ipi)
*/
DEFINE_IDTENTRY_SYSVEC_SIMPLE(sysvec_kvm_posted_intr_nested_ipi)
{
- ack_APIC_irq();
+ apic_eoi();
inc_irq_stat(kvm_posted_intr_nested_ipis);
}
#endif
@@ -401,6 +401,6 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_thermal)
inc_irq_stat(irq_thermal_count);
smp_thermal_vector();
trace_thermal_apic_exit(THERMAL_APIC_VECTOR);
- ack_APIC_irq();
+ apic_eoi();
}
#endif
diff --git a/arch/x86/kernel/irq_work.c b/arch/x86/kernel/irq_work.c
index 890d477..ee53419 100644
--- a/arch/x86/kernel/irq_work.c
+++ b/arch/x86/kernel/irq_work.c
@@ -16,7 +16,7 @@
#ifdef CONFIG_X86_LOCAL_APIC
DEFINE_IDTENTRY_SYSVEC(sysvec_irq_work)
{
- ack_APIC_irq();
+ apic_eoi();
trace_irq_work_entry(IRQ_WORK_VECTOR);
inc_irq_stat(apic_irq_work_irqs);
irq_work_run();
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index c2e3e7a..f5339e3 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -291,7 +291,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_kvm_asyncpf_interrupt)
struct pt_regs *old_regs = set_irq_regs(regs);
u32 token;

- ack_APIC_irq();
+ apic_eoi();

inc_irq_stat(irq_hv_callback_count);

diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index 7eb18ca..6299bf8 100644
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -135,7 +135,7 @@ static int smp_stop_nmi_callback(unsigned int val, struct pt_regs *regs)
*/
DEFINE_IDTENTRY_SYSVEC(sysvec_reboot)
{
- ack_APIC_irq();
+ apic_eoi();
cpu_emergency_disable_virtualization();
stop_this_cpu(NULL);
}
@@ -268,7 +268,7 @@ done:
*/
DEFINE_IDTENTRY_SYSVEC_SIMPLE(sysvec_reschedule_ipi)
{
- ack_APIC_irq();
+ apic_eoi();
trace_reschedule_entry(RESCHEDULE_VECTOR);
inc_irq_stat(irq_resched_count);
scheduler_ipi();
@@ -277,7 +277,7 @@ DEFINE_IDTENTRY_SYSVEC_SIMPLE(sysvec_reschedule_ipi)

DEFINE_IDTENTRY_SYSVEC(sysvec_call_function)
{
- ack_APIC_irq();
+ apic_eoi();
trace_call_function_entry(CALL_FUNCTION_VECTOR);
inc_irq_stat(irq_call_count);
generic_smp_call_function_interrupt();
@@ -286,7 +286,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_call_function)

DEFINE_IDTENTRY_SYSVEC(sysvec_call_function_single)
{
- ack_APIC_irq();
+ apic_eoi();
trace_call_function_single_entry(CALL_FUNCTION_SINGLE_VECTOR);
inc_irq_stat(irq_call_count);
generic_smp_call_function_single_interrupt();
diff --git a/arch/x86/xen/enlighten_hvm.c b/arch/x86/xen/enlighten_hvm.c
index a6820ca..9a192f5 100644
--- a/arch/x86/xen/enlighten_hvm.c
+++ b/arch/x86/xen/enlighten_hvm.c
@@ -132,7 +132,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_xen_hvm_callback)
struct pt_regs *old_regs = set_irq_regs(regs);

if (xen_percpu_upcall)
- ack_APIC_irq();
+ apic_eoi();

inc_irq_stat(irq_hv_callback_count);

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