Messages in this thread Patch in this message | | | Date | Wed, 04 Nov 2015 22:57:00 -0000 | From | Thomas Gleixner <> | Subject | [patch 02/14] x86/apic: Implement single target IPI function for x2apic_cluster |
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From: Linus Torvalds <torvalds@linux-foundation.org>
[ tglx: Split it out from the patch which provides the new callback and wrapped it into local_irq_save/restore ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> --- arch/x86/kernel/apic/x2apic_cluster.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
Index: linux/arch/x86/kernel/apic/x2apic_cluster.c =================================================================== --- linux.orig/arch/x86/kernel/apic/x2apic_cluster.c +++ linux/arch/x86/kernel/apic/x2apic_cluster.c @@ -23,6 +23,17 @@ static inline u32 x2apic_cluster(int cpu return per_cpu(x86_cpu_to_logical_apicid, cpu) >> 16; } +static void x2apic_send_IPI(int cpu, int vector) +{ + u32 dest = per_cpu(x86_cpu_to_logical_apicid, cpu); + unsigned long flags; + + x2apic_wrmsr_fence(); + local_irq_save(flags); + __x2apic_send_IPI_dest(dest, vector, APIC_DEST_LOGICAL); + local_irq_restore(flags); +} + static void __x2apic_send_IPI_mask(const struct cpumask *mask, int vector, int apic_dest) { @@ -266,6 +277,7 @@ static struct apic apic_x2apic_cluster = .cpu_mask_to_apicid_and = x2apic_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,
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