[Xen-devel] [PATCH v2 5/6] arm32: enable PSCI secondary CPU bringup

[Andre Przywara <andre.przywara@xxxxxxxxxx>]

If the device tree contains a PSCI node, we bring up secondary CPUs
by invoking the appropriate PSCI handler.
This will take priority over platform specific functions (which could
call the PSCI wrapper themselves if needed), so any PSCI enablement
of a platform will automatically be used (as on Linux).

Signed-off-by: Andre Przywara <andre.przywara@xxxxxxxxxx>
---
 xen/arch/arm/arm32/smpboot.c | 4 +++-
 xen/arch/arm/platform.c      | 4 ++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/xen/arch/arm/arm32/smpboot.c b/xen/arch/arm/arm32/smpboot.c
index 88fe8fb..2a77f29 100644
--- a/xen/arch/arm/arm32/smpboot.c
+++ b/xen/arch/arm/arm32/smpboot.c
@@ -10,7 +10,9 @@ int __init arch_smp_init(void)
 
 int __init arch_cpu_init(int cpu, struct dt_device_node *dn)
 {
-    /* TODO handle PSCI init */
+    /* Not needed on ARM32, as there is no relevant information in
+     * the CPU device tree node for ARMv7 CPUs.
+     */
     return 0;
 }
 
diff --git a/xen/arch/arm/platform.c b/xen/arch/arm/platform.c
index 056d462..608e689 100644
--- a/xen/arch/arm/platform.c
+++ b/xen/arch/arm/platform.c
@@ -20,6 +20,7 @@
 #include <asm/platform.h>
 #include <xen/device_tree.h>
 #include <xen/init.h>
+#include <asm/psci.h>
 
 extern const struct platform_desc _splatform[], _eplatform[];
 
@@ -109,6 +110,9 @@ int __init platform_specific_mapping(struct domain *d)
 #ifdef CONFIG_ARM_32
 int __init platform_cpu_up(int cpu)
 {
+    if ( psci_available )
+        return call_psci_cpu_on(cpu, init_secondary);
+
     if ( platform && platform->cpu_up )
         return platform->cpu_up(cpu);
 
-- 
1.7.12.1


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