[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen master] xen/dts: Check the CPU ID is not greater than NR_CPUS
commit 7a35c108b35b7e008e5a2bf521b24515c5f8a910 Author: Julien Grall <julien.grall@xxxxxxxxxx> AuthorDate: Fri Sep 13 13:49:15 2013 +0100 Commit: Ian Campbell <ian.campbell@xxxxxxxxxx> CommitDate: Tue Sep 17 15:28:08 2013 +0100 xen/dts: Check the CPU ID is not greater than NR_CPUS On some board CPU IDs are not contiguous (for instance the Versatile Express with big.LITTLE supports). If the CPU ID is greater than NR_CPUS Xen will hang without any message. This is because console driver is not yet initialized and hypervisor data abort uses printk. For the moment check the CPU ID and print an warning if an error occured. Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx> Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx> --- xen/common/device_tree.c | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-) diff --git a/xen/common/device_tree.c b/xen/common/device_tree.c index 9d300ec..d2262ce 100644 --- a/xen/common/device_tree.c +++ b/xen/common/device_tree.c @@ -445,6 +445,13 @@ static void __init process_cpu_node(const void *fdt, int node, cpuid = dt_read_number((const __be32 *)prop->data, 1); + /* TODO: handle non-contiguous CPU ID */ + if ( cpuid >= NR_CPUS ) + { + dt_printk("fdt: node `%s': reg(0x%x) >= NR_CPUS(%d)\n", + name, cpuid, NR_CPUS); + return; + } cpumask_set_cpu(cpuid, &cpu_possible_map); } -- generated by git-patchbot for /home/xen/git/xen.git#master _______________________________________________ Xen-changelog mailing list Xen-changelog@xxxxxxxxxxxxx http://lists.xensource.com/xen-changelog
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