[Xen-devel] [PATCH 10/16] xen: arm: enable synchronous console while starting secondary CPUs

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

If CONFIG_EARLY_PRINTK is in use then this gets all interleaved with the
standard logging otherwise.

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
 xen/arch/arm/smpboot.c |    5 +++++
 1 file changed, 5 insertions(+)

diff --git a/xen/arch/arm/smpboot.c b/xen/arch/arm/smpboot.c
index ce832ae..9b58345 100644
--- a/xen/arch/arm/smpboot.c
+++ b/xen/arch/arm/smpboot.c
@@ -28,6 +28,7 @@
 #include <xen/softirq.h>
 #include <xen/timer.h>
 #include <xen/irq.h>
+#include <xen/console.h>
 #include <asm/gic.h>
 
 cpumask_t cpu_online_map;
@@ -349,6 +350,8 @@ int __cpu_up(unsigned int cpu)
     if ( rc < 0 )
         return rc;
 
+    console_start_sync(); /* Secondary may use early_printk */
+
     /* Tell the remote CPU which stack to boot on. */
     init_data.stack = idle_vcpu[cpu]->arch.stack;
 
@@ -361,6 +364,8 @@ int __cpu_up(unsigned int cpu)
 
     rc = arch_cpu_up(cpu);
 
+    console_end_sync();
+
     if ( rc < 0 )
     {
         printk("Failed to bring up CPU%d\n", cpu);
-- 
1.7.10.4


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