[PATCH v7 18/20] xen/riscv: initialize RCU, scheduler, and system domains in start_xen()

Wire up the missing early-boot initialization steps in start_xen().

The scheduler must be initialized prior to do_initcalls() because
cpupool_create_pool() is called during initcalls; without it,
BUG_ON(IS_ERR(pool)) is triggered inside cpupool_create_pool().

Signed-off-by: Oleksii Kurochko <[email protected]>
Acked-by: Jan Beulich <[email protected]>
---
Changes in v4-7:
 - Nothing changed. Only rebase.
---
Changes in v3:
 - Add Acked-by: Jan Beulich <[email protected]>.
---
Changes in v2:
 - New patch. Several patches were folded into one.
---
---
 xen/arch/riscv/setup.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/xen/arch/riscv/setup.c b/xen/arch/riscv/setup.c
index 56a0907a855f..c3e98733ebc3 100644
--- a/xen/arch/riscv/setup.c
+++ b/xen/arch/riscv/setup.c
@@ -6,9 +6,12 @@
 #include <xen/compile.h>
 #include <xen/console.h>
 #include <xen/device_tree.h>
+#include <xen/domain.h>
 #include <xen/init.h>
 #include <xen/irq.h>
 #include <xen/mm.h>
+#include <xen/rcupdate.h>
+#include <xen/sched.h>
 #include <xen/serial.h>
 #include <xen/shutdown.h>
 #include <xen/smp.h>
@@ -156,12 +159,21 @@ void __init noreturn start_xen(unsigned long bootcpu_id,
 
     timer_init();
 
+    rcu_init();
+
+    setup_system_domains();
+
     local_irq_enable();
 
     console_init_postirq();
 
     guest_mm_init();
 
+    scheduler_init();
+    set_current(idle_vcpu[0]);
+
+    do_initcalls();
+
     printk("All set up\n");
 
     machine_halt();
-- 
2.55.0