[patch 08/14] x86/apic: Implement single IPI for x2apic_phys

Thomas Gleixner
2015-11-04T23:00:51Z

[-- Attachment #1: x86-apic--Implement-single-IPI-for-x2apic_phys --]
[-- Type: text/plain, Size: 1170 bytes --]

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/kernel/apic/x2apic_phys.c | 12 ++++++++++++
1 file changed, 12 insertions(+)

Index: linux/arch/x86/kernel/apic/x2apic_phys.c
===================================================================
--- linux.orig/arch/x86/kernel/apic/x2apic_phys.c
+++ linux/arch/x86/kernel/apic/x2apic_phys.c
@@ -36,6 +36,17 @@ static int x2apic_acpi_madt_oem_check(ch
return x2apic_enabled() && (x2apic_phys || x2apic_fadt_phys());
}

+static void x2apic_send_IPI(int cpu, int vector)
+{
+ u32 dest = per_cpu(x86_cpu_to_apicid, cpu);
+ unsigned long flags;
+
+ x2apic_wrmsr_fence();
+ local_irq_save(flags);
+ __x2apic_send_IPI_dest(dest, vector, APIC_DEST_PHYSICAL);
+ local_irq_restore(flags);
+}
+
static void
__x2apic_send_IPI_mask(const struct cpumask *mask, int vector, int apic_dest)
{
@@ -122,6 +133,7 @@ static struct apic apic_x2apic_phys = {

.cpu_mask_to_apicid_and = default_cpu_mask_to_apicid_and,

+ .send_IPI = x2apic_send_IPI,
.send_IPI_mask = x2apic_send_IPI_mask,
.send_IPI_mask_allbutself = x2apic_send_IPI_mask_allbutself,
.send_IPI_allbutself = x2apic_send_IPI_allbutself,