From: Julien Grall Date: Thu, 19 Jun 2014 14:02:16 +0000 (+0100) Subject: xen/arm: Init traps very early X-Git-Tag: 4.5.0-rc1~607 X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=bea392432119c1dedefb448d4c053151da36c6e0;p=xen.git xen/arm: Init traps very early The function init_traps sets up the handler taken when Xen hits a BUG_ON/ASSERT. If an error happen before init_traps is called, we lose the backtrace. When a trap is taken from HYP mode, we need to: - get the processor ID, percpu has to be initialized and the smp_processor_id correctly set. - initialize current, even though it's not used for the time being. Move the debug sanity earlier. Signed-off-by: Julien Grall Tested-by: Naresh Bhat Acked-by: Ian Campbell [ ijc -- fixed typos and rewrapped commit log ] --- diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c index b9ce7a939e..78dc7f5fc5 100644 --- a/xen/arch/arm/setup.c +++ b/xen/arch/arm/setup.c @@ -670,6 +670,12 @@ void __init start_xen(unsigned long 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; + + /* Initialize traps early allow us to get backtrace when an error occurred */ + init_traps(); + smp_clear_cpu_maps(); /* This is mapped by head.S */ @@ -706,11 +712,6 @@ void __init start_xen(unsigned long boot_phys_offset, gic_init(); - set_current((struct vcpu *)0xfffff000); /* debug sanity */ - idle_vcpu[0] = current; - - init_traps(); - setup_virt_paging(); p2m_vmid_allocator_init();