From c9760939c0cea28c7cbaacd3f893fc6cefc09bef Mon Sep 17 00:00:00 2001 From: Julien Grall Date: Thu, 26 Sep 2013 12:09:37 +0100 Subject: [PATCH] xen/arm: Initialize correctly IRQ routing When Xen initialize the GIC distributor, we need to route all the IRQs to the boot CPU. The CPU ID can differ between Xen and the GIC. When ITARGETSR0 is read, each field will return a value that corresponds only to the processor reading the register. So Xen can use the PPI 0 to initialize correctly the routing. Signed-off-by: Julien Grall Acked-by: Ian Campbell --- xen/arch/arm/gic.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/xen/arch/arm/gic.c b/xen/arch/arm/gic.c index 091eb36725..b969d236cc 100644 --- a/xen/arch/arm/gic.c +++ b/xen/arch/arm/gic.c @@ -258,9 +258,10 @@ void gic_route_dt_irq(const struct dt_irq *irq, const cpumask_t *cpu_mask, static void __init gic_dist_init(void) { uint32_t type; - uint32_t cpumask = 1 << smp_processor_id(); + uint32_t cpumask; int i; + cpumask = GICD[GICD_ITARGETSR] & 0xff; cpumask |= cpumask << 8; cpumask |= cpumask << 16; -- 2.30.2