[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Xen-changelog] [xen master] xen/arm: Initialize correctly IRQ routing

commit c9760939c0cea28c7cbaacd3f893fc6cefc09bef
Author:     Julien Grall <julien.grall@xxxxxxxxxx>
AuthorDate: Thu Sep 26 12:09:37 2013 +0100
Commit:     Ian Campbell <ian.campbell@xxxxxxxxxx>
CommitDate: Thu Sep 26 15:44:45 2013 +0100

    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 <julien.grall@xxxxxxxxxx>
    Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
 xen/arch/arm/gic.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/xen/arch/arm/gic.c b/xen/arch/arm/gic.c
index 091eb36..b969d23 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;
generated by git-patchbot for /home/xen/git/xen.git#master

Xen-changelog mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.