[XEN PATCH v5 5/7] xen/arm: add and call init_tee_interrupt()

[Jens Wiklander <jens.wiklander@xxxxxxxxxx>]

Add init_tee_interrupt() to the TEE mediator framework and call it from
start_secondary() late enough that per-cpu interrupts can be configured
on CPUs as they are initialized. This is needed in later patches.

Signed-off-by: Jens Wiklander <jens.wiklander@xxxxxxxxxx>
---
 xen/arch/arm/include/asm/tee/tee.h | 8 ++++++++
 xen/arch/arm/smpboot.c             | 2 ++
 xen/arch/arm/tee/tee.c             | 6 ++++++
 3 files changed, 16 insertions(+)

diff --git a/xen/arch/arm/include/asm/tee/tee.h 
b/xen/arch/arm/include/asm/tee/tee.h
index da324467e130..eda8a8aa38f2 100644
--- a/xen/arch/arm/include/asm/tee/tee.h
+++ b/xen/arch/arm/include/asm/tee/tee.h
@@ -28,6 +28,9 @@ struct tee_mediator_ops {
      */
     bool (*probe)(void);
 
+    /* Initialize eventual interrupt handlers on the secondary CPUs */
+    void (*init_interrupt)(void);
+
     /*
      * Called during domain construction if toolstack requests to enable
      * TEE support so mediator can inform TEE about new
@@ -66,6 +69,7 @@ int tee_domain_init(struct domain *d, uint16_t tee_type);
 int tee_domain_teardown(struct domain *d);
 int tee_relinquish_resources(struct domain *d);
 uint16_t tee_get_type(void);
+void init_tee_interrupt(void);
 
 #define REGISTER_TEE_MEDIATOR(_name, _namestr, _type, _ops)         \
 static const struct tee_mediator_desc __tee_desc_##_name __used     \
@@ -105,6 +109,10 @@ static inline uint16_t tee_get_type(void)
     return XEN_DOMCTL_CONFIG_TEE_NONE;
 }
 
+static inline void init_tee_interrupt(void)
+{
+}
+
 #endif  /* CONFIG_TEE */
 
 #endif /* __ARCH_ARM_TEE_TEE_H__ */
diff --git a/xen/arch/arm/smpboot.c b/xen/arch/arm/smpboot.c
index 93a10d7721b4..e1c1e20efd98 100644
--- a/xen/arch/arm/smpboot.c
+++ b/xen/arch/arm/smpboot.c
@@ -29,6 +29,7 @@
 #include <asm/procinfo.h>
 #include <asm/psci.h>
 #include <asm/acpi.h>
+#include <asm/tee/tee.h>
 
 /* Override macros from asm/page.h to make them work with mfn_t */
 #undef virt_to_mfn
@@ -401,6 +402,7 @@ void asmlinkage start_secondary(void)
      */
     init_maintenance_interrupt();
     init_timer_interrupt();
+    init_tee_interrupt();
 
     local_abort_enable();
 
diff --git a/xen/arch/arm/tee/tee.c b/xen/arch/arm/tee/tee.c
index ddd17506a9ff..8117fd55123e 100644
--- a/xen/arch/arm/tee/tee.c
+++ b/xen/arch/arm/tee/tee.c
@@ -96,6 +96,12 @@ static int __init tee_init(void)
 
 __initcall(tee_init);
 
+void __init init_tee_interrupt(void)
+{
+    if ( cur_mediator && cur_mediator->ops->init_interrupt)
+        cur_mediator->ops->init_interrupt();
+}
+
 /*
  * Local variables:
  * mode: C
-- 
2.34.1