[PATCH v2 11/39] xen/riscv: add helper to check APLIC MSI mode

[Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>]

Use convient helper instead of open-coding the things.

Signed-off-by: Oleksii Kurochko <oleksii.kurochko@xxxxxxxxx>
---
Changes in v2:
 - Rename helper.
 - Update the commit message.
---
---
 xen/arch/riscv/aplic.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/xen/arch/riscv/aplic.c b/xen/arch/riscv/aplic.c
index 319a954f6f3c..b4c419755ac3 100644
--- a/xen/arch/riscv/aplic.c
+++ b/xen/arch/riscv/aplic.c
@@ -37,6 +37,11 @@ static struct intc_info __ro_after_init aplic_info = {
     .hw_variant = INTC_APLIC,
 };
 
+static bool aplic_msi_mode(void)
+{
+    return readl(&aplic.regs->domaincfg) & APLIC_DOMAINCFG_DM;
+}
+
 /*
  * The arrangement of IMSIC interrupt files in MMIO space follows a topology
  * defined by the RISC-V AIA specification. An IMSIC group is a set of
@@ -250,7 +255,7 @@ static void cf_check aplic_irq_enable(struct irq_desc *desc)
      *       If APLIC without MSI interrupts is required in the future,
      *       this function will need to be updated accordingly.
      */
-    ASSERT(readl(&aplic.regs->domaincfg) & APLIC_DOMAINCFG_DM);
+    ASSERT(aplic_msi_mode());
 
     ASSERT(spin_is_locked(&desc->lock));
 
@@ -281,7 +286,7 @@ static void cf_check aplic_irq_disable(struct irq_desc 
*desc)
      *       If APLIC without MSI interrupts is required in the future,
      *       this function will need to be updated accordingly.
      */
-    ASSERT(readl(&aplic.regs->domaincfg) & APLIC_DOMAINCFG_DM);
+    ASSERT(aplic_msi_mode());
 
     ASSERT(spin_is_locked(&desc->lock));
 
-- 
2.55.0