[PATCH] xen: arm: Spin-up cpu instead PSCI CPU OFF

[dmitry.semenets@xxxxxxxxx]

From: Dmytro Semenets <dmytro_semenets@xxxxxxxx>

Use spin-up cpu with disabled interrupts instead PSCI CPU OFF
halt and reboot procedures. Some platforms can't stop CPU via PSCI
because Thrusted OS can't migrate execution to other CPU.

Signed-off-by: Dmytro Semenets <dmytro_semenets@xxxxxxxx>
---
 xen/arch/arm/shutdown.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/xen/arch/arm/shutdown.c b/xen/arch/arm/shutdown.c
index 3dc6819d56..a9aea19e8e 100644
--- a/xen/arch/arm/shutdown.c
+++ b/xen/arch/arm/shutdown.c
@@ -8,7 +8,12 @@
 
 static void noreturn halt_this_cpu(void *arg)
 {
-    stop_cpu();
+    local_irq_disable();
+    /* Make sure the write happens before we sleep forever */
+    dsb(sy);
+    isb();
+    while ( 1 )
+        wfi();
 }
 
 void machine_halt(void)
-- 
2.25.1