[PATCH 05/10] xen/arm: Process pending vPCI map/unmap operations

[Oleksandr Andrushchenko <andr2000@gmail.com>]

From: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>

vPCI may map and unmap PCI device memory (BARs) being passed through which
may take a lot of time. For this those operations may be deferred to be
performed later, so that they can be safely preempted.
Run the corresponding vPCI code while switching a vCPU.

Signed-off-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
---
 xen/arch/arm/traps.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/xen/arch/arm/traps.c b/xen/arch/arm/traps.c
index 8f40d0e0b6b1..1c54dc0cdd51 100644
--- a/xen/arch/arm/traps.c
+++ b/xen/arch/arm/traps.c
@@ -33,6 +33,7 @@
 #include <xen/symbols.h>
 #include <xen/version.h>
 #include <xen/virtual_region.h>
+#include <xen/vpci.h>
 
 #include <public/sched.h>
 #include <public/xen.h>
@@ -2253,6 +2254,11 @@ static void check_for_vcpu_work(void)
 {
     struct vcpu *v = current;
 
+    local_irq_enable();
+    if ( has_vpci(v->domain) && vpci_process_pending(v) )
+        raise_softirq(SCHEDULE_SOFTIRQ);
+    local_irq_disable();
+
     if ( likely(!v->arch.need_flush_to_ram) )
         return;
 
-- 
2.17.1