From ddadeb61d5877eaa186b7cb6a0c0bcd89c276f16 Mon Sep 17 00:00:00 2001 From: adrian Date: Sat, 30 May 2009 08:53:13 +0000 Subject: Make ipi_cpu() function as intended. IPI's in Xen are implemented through hypervisor event channels. The MP code creates a pair of IRQs for each base IPI per CPU (one for IPI function dispatch calls, one for IPI bitmap dispatch calls.) Using PCPU_GET() was returning the IRQ of the IPI handler for the current CPU; thus calls to ipi_cpu() were sending itself a message. Instead, looking up the IPI in the target CPU ipi-to-irq map is needed. Note: This doesn't fix Xen SMP (far from it!) but it at least sends IPI's to the right places. Next - sending IPIs.. PR: 135069 --- sys/xen/evtchn/evtchn.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'sys/xen/evtchn') diff --git a/sys/xen/evtchn/evtchn.c b/sys/xen/evtchn/evtchn.c index 59d24b2..b175b4a 100644 --- a/sys/xen/evtchn/evtchn.c +++ b/sys/xen/evtchn/evtchn.c @@ -225,12 +225,15 @@ evtchn_do_upcall(struct trapframe *frame) } } +/* + * Send an IPI from the current CPU to the destination CPU. + */ void ipi_pcpu(unsigned int cpu, int vector) { int irq; - irq = PCPU_GET(ipi_to_irq[vector]); + irq = pcpu_find(cpu)->pc_ipi_to_irq[vector]; notify_remote_via_irq(irq); } -- cgit v1.1