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| author | Julien Grall <julien.grall@linaro.org> | 2013-07-24 18:01:36 +0100 |
|---|---|---|
| committer | Ian Campbell <ian.campbell@citrix.com> | 2013-07-29 16:54:39 +0100 |
| commit | c433774a6ea84c46c25fdf8ef7e2657aaf2c7f2b (patch) | |
| tree | 6097b8fafd3e5625429a860ac7245033800357f3 /xen/arch/arm/setup.c | |
| parent | fc8dbb8b4546b31e0b7d1a7d84d00e02319f245a (diff) | |
| download | xen-c433774a6ea84c46c25fdf8ef7e2657aaf2c7f2b.tar.gz xen-c433774a6ea84c46c25fdf8ef7e2657aaf2c7f2b.tar.bz2 xen-c433774a6ea84c46c25fdf8ef7e2657aaf2c7f2b.zip | |
xen/arm: Initialize PERCPU variables at the beginning of start_xen
PERCPU variables rely on HTPIDR (TPIDR_EL2) which is in an unknown state when
a processor boot.
For the boot CPU, the first use of PERCPU is in setup_pagetables. So
initialize PERCPU and set the processor ID before.
Bamvor Jian Zhang observed this failure on the sun6i processor which does not
initialise HTPIDR and contributed a very similar patch.
Signed-off-by: Julien Grall <julien.grall@linaro.org>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Tim Deegan <tim@xen.org>
[ ijc -- added last para of commit message ]
Diffstat (limited to 'xen/arch/arm/setup.c')
| -rw-r--r-- | xen/arch/arm/setup.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c index 2f9fdc805e..1ec5e389a1 100644 --- a/xen/arch/arm/setup.c +++ b/xen/arch/arm/setup.c @@ -428,6 +428,9 @@ void __init start_xen(unsigned long boot_phys_offset, setup_cache(); + percpu_init_areas(); + set_processor_id(0); /* needed early, for smp_processor_id() */ + smp_clear_cpu_maps(); device_tree_flattened = (void *)BOOT_MISC_VIRT_START @@ -458,8 +461,6 @@ void __init start_xen(unsigned long boot_phys_offset, gic_init(); make_cpus_ready(cpus, boot_phys_offset); - percpu_init_areas(); - set_processor_id(0); /* needed early, for smp_processor_id() */ set_current((struct vcpu *)0xfffff000); /* debug sanity */ idle_vcpu[0] = current; |