[PATCH v2 15/26] xen/riscv: introduce (de)initialization helpers for vINTC

[Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>]

Add common helpers domain_vintc_init() and domain_vintc_deinit() to
allocate and deallocate a virtual interrupt controller (vINTC)
structure and initialize basic virtual interrupt controller registers.

domain_vintc_deinit() isn't called at the momemnt as arch_domain_destroy()
is implemented as stub at the moment.

Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
---
Changes in v2:
 - Drop __init for domain_vintc_(de)init().
 - Update the commit message.
---
 xen/arch/riscv/domain.c           |  3 +++
 xen/arch/riscv/include/asm/intc.h |  3 +++
 xen/arch/riscv/intc.c             | 36 +++++++++++++++++++++++++++++++
 3 files changed, 42 insertions(+)

diff --git a/xen/arch/riscv/domain.c b/xen/arch/riscv/domain.c
index 7aa00d6cfd95..6de5b82b3724 100644
--- a/xen/arch/riscv/domain.c
+++ b/xen/arch/riscv/domain.c
@@ -306,6 +306,9 @@ int arch_domain_create(struct domain *d,
     if ( (rc = p2m_init(d, config)) != 0)
         goto fail;
 
+    if ( (rc = domain_vintc_init(d)) )
+        goto fail;
+
     return rc;
 
  fail:
diff --git a/xen/arch/riscv/include/asm/intc.h 
b/xen/arch/riscv/include/asm/intc.h
index 3b30d000066a..89a9c6806e55 100644
--- a/xen/arch/riscv/include/asm/intc.h
+++ b/xen/arch/riscv/include/asm/intc.h
@@ -80,4 +80,7 @@ void intc_handle_external_irqs(struct cpu_user_regs *regs);
 
 unsigned int intc_irq_nums(void);
 
+int domain_vintc_init(struct domain *d);
+void domain_vintc_deinit(struct domain *d);
+
 #endif /* ASM__RISCV__INTERRUPT_CONTOLLER_H */
diff --git a/xen/arch/riscv/intc.c b/xen/arch/riscv/intc.c
index 122adf78a391..7f9850416bb4 100644
--- a/xen/arch/riscv/intc.c
+++ b/xen/arch/riscv/intc.c
@@ -11,6 +11,7 @@
 
 #include <asm/aia.h>
 #include <asm/intc.h>
+#include <asm/vaplic.h>
 
 static const struct intc_hw_operations *__ro_after_init intc_hw_ops;
 
@@ -94,3 +95,38 @@ int __init make_intc_domU_node(struct kernel_info *kinfo)
 
     return -EOPNOTSUPP;
 }
+
+int domain_vintc_init(struct domain *d)
+{
+    int ret = -EOPNOTSUPP;
+    const enum intc_version ver = intc_hw_ops->info->hw_version;
+
+    switch ( ver )
+    {
+    case INTC_APLIC:
+        ret = domain_vaplic_init(d);
+        break;
+
+    default:
+        printk("vintc (ver:%d) isn't implemented\n", ver);
+        break;
+    }
+
+    return ret;
+}
+
+void domain_vintc_deinit(struct domain *d)
+{
+    const enum intc_version ver = intc_hw_ops->info->hw_version;
+
+    switch ( ver )
+    {
+    case INTC_APLIC:
+        domain_vaplic_deinit(d);
+        break;
+
+    default:
+        printk("vintc (ver:%d) isn't implemented\n", ver);
+        break;
+    }
+}
-- 
2.54.0