[tip: x86/apic] x86/apic: Wrap IPI calls into helper functions

From: tip-bot2 for Dave Hansen
Date: Wed Aug 09 2023 - 16:36:14 EST

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

Commit-ID: 28b8235238fa39a1b5c5820e7f5b14e7f104aac0
Gitweb: https://git.kernel.org/tip/28b8235238fa39a1b5c5820e7f5b14e7f104aac0
Author: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
AuthorDate: Wed, 09 Aug 2023 08:21:45 -07:00
Committer: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
CommitterDate: Wed, 09 Aug 2023 12:00:55 -07:00

x86/apic: Wrap IPI calls into helper functions

Move them to one place so the static call conversion gets simpler.

No functional change.

[ dhansen: merge against recent x86/apic changes ]

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
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_spinlock.c | 2 +-
arch/x86/include/asm/apic.h | 30 ++++++++++++++++++++++++++++++
arch/x86/kernel/apic/apic.c | 2 +-
arch/x86/kernel/apic/hw_nmi.c | 4 +++-
arch/x86/kernel/apic/ipi.c | 16 ++++++++--------
arch/x86/kernel/apic/vector.c | 2 +-
arch/x86/kernel/cpu/mce/inject.c | 3 +--
arch/x86/kernel/irq_work.c | 2 +-
arch/x86/kernel/nmi_selftest.c | 2 +-
arch/x86/kernel/smp.c | 2 +-
arch/x86/kvm/vmx/posted_intr.c | 2 +-
arch/x86/kvm/vmx/vmx.c | 2 +-
arch/x86/platform/uv/uv_nmi.c | 2 +-
13 files changed, 51 insertions(+), 20 deletions(-)

diff --git a/arch/x86/hyperv/hv_spinlock.c b/arch/x86/hyperv/hv_spinlock.c
index 91cfe69..737d6f7 100644
--- a/arch/x86/hyperv/hv_spinlock.c
+++ b/arch/x86/hyperv/hv_spinlock.c
@@ -20,7 +20,7 @@ static bool __initdata hv_pvspin = true;

static void hv_qlock_kick(int cpu)
{
- apic->send_IPI(cpu, X86_PLATFORM_IPI_VECTOR);
+ __apic_send_IPI(cpu, X86_PLATFORM_IPI_VECTOR);
}

static void hv_qlock_wait(u8 *byte, u8 val)
diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index 28192a2..62471e2 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -401,6 +401,36 @@ static __always_inline void apic_icr_write(u32 low, u32 high)
apic->icr_write(low, high);
}

+static __always_inline void __apic_send_IPI(int cpu, int vector)
+{
+ apic->send_IPI(cpu, vector);
+}
+
+static __always_inline void __apic_send_IPI_mask(const struct cpumask *mask, int vector)
+{
+ apic->send_IPI_mask(mask, vector);
+}
+
+static __always_inline void __apic_send_IPI_mask_allbutself(const struct cpumask *mask, int vector)
+{
+ apic->send_IPI_mask_allbutself(mask, vector);
+}
+
+static __always_inline void __apic_send_IPI_allbutself(int vector)
+{
+ apic->send_IPI_allbutself(vector);
+}
+
+static __always_inline void __apic_send_IPI_all(int vector)
+{
+ apic->send_IPI_all(vector);
+}
+
+static __always_inline void __apic_send_IPI_self(int vector)
+{
+ apic->send_IPI_self(vector);
+}
+
static __always_inline void apic_wait_icr_idle(void)
{
if (apic->wait_icr_idle)
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 55f2b96..760adac 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -502,7 +502,7 @@ static int lapic_timer_set_oneshot(struct clock_event_device *evt)
static void lapic_timer_broadcast(const struct cpumask *mask)
{
#ifdef CONFIG_SMP
- apic->send_IPI_mask(mask, LOCAL_TIMER_VECTOR);
+ __apic_send_IPI_mask(mask, LOCAL_TIMER_VECTOR);
#endif
}

diff --git a/arch/x86/kernel/apic/hw_nmi.c b/arch/x86/kernel/apic/hw_nmi.c
index 34a992e..07a3dd1 100644
--- a/arch/x86/kernel/apic/hw_nmi.c
+++ b/arch/x86/kernel/apic/hw_nmi.c
@@ -21,6 +21,8 @@
#include <linux/init.h>
#include <linux/delay.h>

+#include "local.h"
+
#ifdef CONFIG_HARDLOCKUP_DETECTOR_PERF
u64 hw_nmi_get_sample_period(int watchdog_thresh)
{
@@ -31,7 +33,7 @@ u64 hw_nmi_get_sample_period(int watchdog_thresh)
#ifdef arch_trigger_cpumask_backtrace
static void nmi_raise_cpu_backtrace(cpumask_t *mask)
{
- apic->send_IPI_mask(mask, NMI_VECTOR);
+ __apic_send_IPI_mask(mask, NMI_VECTOR);
}

void arch_trigger_cpumask_backtrace(const cpumask_t *mask, bool exclude_self)
diff --git a/arch/x86/kernel/apic/ipi.c b/arch/x86/kernel/apic/ipi.c
index 460df02..b54b2a6 100644
--- a/arch/x86/kernel/apic/ipi.c
+++ b/arch/x86/kernel/apic/ipi.c
@@ -54,9 +54,9 @@ void apic_send_IPI_allbutself(unsigned int vector)
return;

if (static_branch_likely(&apic_use_ipi_shorthand))
- apic->send_IPI_allbutself(vector);
+ __apic_send_IPI_allbutself(vector);
else
- apic->send_IPI_mask_allbutself(cpu_online_mask, vector);
+ __apic_send_IPI_mask_allbutself(cpu_online_mask, vector);
}

/*
@@ -70,12 +70,12 @@ void native_smp_send_reschedule(int cpu)
WARN(1, "sched: Unexpected reschedule of offline CPU#%d!\n", cpu);
return;
}
- apic->send_IPI(cpu, RESCHEDULE_VECTOR);
+ __apic_send_IPI(cpu, RESCHEDULE_VECTOR);
}

void native_send_call_func_single_ipi(int cpu)
{
- apic->send_IPI(cpu, CALL_FUNCTION_SINGLE_VECTOR);
+ __apic_send_IPI(cpu, CALL_FUNCTION_SINGLE_VECTOR);
}

void native_send_call_func_ipi(const struct cpumask *mask)
@@ -87,14 +87,14 @@ void native_send_call_func_ipi(const struct cpumask *mask)
goto sendmask;

if (cpumask_test_cpu(cpu, mask))
- apic->send_IPI_all(CALL_FUNCTION_VECTOR);
+ __apic_send_IPI_all(CALL_FUNCTION_VECTOR);
else if (num_online_cpus() > 1)
- apic->send_IPI_allbutself(CALL_FUNCTION_VECTOR);
+ __apic_send_IPI_allbutself(CALL_FUNCTION_VECTOR);
return;
}

sendmask:
- apic->send_IPI_mask(mask, CALL_FUNCTION_VECTOR);
+ __apic_send_IPI_mask(mask, CALL_FUNCTION_VECTOR);
}

#endif /* CONFIG_SMP */
@@ -221,7 +221,7 @@ void default_send_IPI_mask_allbutself_phys(const struct cpumask *mask,
*/
void default_send_IPI_single(int cpu, int vector)
{
- apic->send_IPI_mask(cpumask_of(cpu), vector);
+ __apic_send_IPI_mask(cpumask_of(cpu), vector);
}

void default_send_IPI_allbutself(int vector)
diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c
index 4a262c6..319448d 100644
--- a/arch/x86/kernel/apic/vector.c
+++ b/arch/x86/kernel/apic/vector.c
@@ -898,7 +898,7 @@ static int apic_retrigger_irq(struct irq_data *irqd)
unsigned long flags;

raw_spin_lock_irqsave(&vector_lock, flags);
- apic->send_IPI(apicd->cpu, apicd->vector);
+ __apic_send_IPI(apicd->cpu, apicd->vector);
raw_spin_unlock_irqrestore(&vector_lock, flags);

return 1;
diff --git a/arch/x86/kernel/cpu/mce/inject.c b/arch/x86/kernel/cpu/mce/inject.c
index 12cf2e7..4d8d4bc 100644
--- a/arch/x86/kernel/cpu/mce/inject.c
+++ b/arch/x86/kernel/cpu/mce/inject.c
@@ -270,8 +270,7 @@ static void __maybe_unused raise_mce(struct mce *m)
mce_irq_ipi, NULL, 0);
preempt_enable();
} else if (m->inject_flags & MCJ_NMI_BROADCAST)
- apic->send_IPI_mask(mce_inject_cpumask,
- NMI_VECTOR);
+ __apic_send_IPI_mask(mce_inject_cpumask, NMI_VECTOR);
}
start = jiffies;
while (!cpumask_empty(mce_inject_cpumask)) {
diff --git a/arch/x86/kernel/irq_work.c b/arch/x86/kernel/irq_work.c
index ee53419..b0a24de 100644
--- a/arch/x86/kernel/irq_work.c
+++ b/arch/x86/kernel/irq_work.c
@@ -28,7 +28,7 @@ void arch_irq_work_raise(void)
if (!arch_irq_work_has_interrupt())
return;

- apic->send_IPI_self(IRQ_WORK_VECTOR);
+ __apic_send_IPI_self(IRQ_WORK_VECTOR);
apic_wait_icr_idle();
}
#endif
diff --git a/arch/x86/kernel/nmi_selftest.c b/arch/x86/kernel/nmi_selftest.c
index a1a96df..e93a854 100644
--- a/arch/x86/kernel/nmi_selftest.c
+++ b/arch/x86/kernel/nmi_selftest.c
@@ -75,7 +75,7 @@ static void __init test_nmi_ipi(struct cpumask *mask)
/* sync above data before sending NMI */
wmb();

- apic->send_IPI_mask(mask, NMI_VECTOR);
+ __apic_send_IPI_mask(mask, NMI_VECTOR);

/* Don't wait longer than a second */
timeout = USEC_PER_SEC;
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index 6299bf8..6eb06d0 100644
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -237,7 +237,7 @@ static void native_stop_other_cpus(int wait)
pr_emerg("Shutting down cpus with NMI\n");

for_each_cpu(cpu, &cpus_stop_mask)
- apic->send_IPI(cpu, NMI_VECTOR);
+ __apic_send_IPI(cpu, NMI_VECTOR);
}
/*
* Don't wait longer than 10 ms if the caller didn't
diff --git a/arch/x86/kvm/vmx/posted_intr.c b/arch/x86/kvm/vmx/posted_intr.c
index 94c38be..af66231 100644
--- a/arch/x86/kvm/vmx/posted_intr.c
+++ b/arch/x86/kvm/vmx/posted_intr.c
@@ -175,7 +175,7 @@ static void pi_enable_wakeup_handler(struct kvm_vcpu *vcpu)
* scheduled out).
*/
if (pi_test_on(&new))
- apic->send_IPI_self(POSTED_INTR_WAKEUP_VECTOR);
+ __apic_send_IPI_self(POSTED_INTR_WAKEUP_VECTOR);

local_irq_restore(flags);
}
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index df461f3..b483a8b 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -4179,7 +4179,7 @@ static inline void kvm_vcpu_trigger_posted_interrupt(struct kvm_vcpu *vcpu,
*/

if (vcpu != kvm_get_running_vcpu())
- apic->send_IPI_mask(get_cpu_mask(vcpu->cpu), pi_vec);
+ __apic_send_IPI_mask(get_cpu_mask(vcpu->cpu), pi_vec);
return;
}
#endif
diff --git a/arch/x86/platform/uv/uv_nmi.c b/arch/x86/platform/uv/uv_nmi.c
index a60af02..85f9aa0 100644
--- a/arch/x86/platform/uv/uv_nmi.c
+++ b/arch/x86/platform/uv/uv_nmi.c
@@ -601,7 +601,7 @@ static void uv_nmi_nr_cpus_ping(void)
for_each_cpu(cpu, uv_nmi_cpu_mask)
uv_cpu_nmi_per(cpu).pinging = 1;

- apic->send_IPI_mask(uv_nmi_cpu_mask, APIC_DM_NMI);
+ __apic_send_IPI_mask(uv_nmi_cpu_mask, APIC_DM_NMI);
}

/* Clean up flags for CPU's that ignored both NMI and ping */

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