[PATCH v1 4/4] xen: arm: Enclose access to EL2 MMU specific registers under CONFIG_MMU

[Ayan Kumar Halder <ayan.kumar.halder@xxxxxxx>]

All the EL2 MMU specific registers are enclosed within CONFIG_MMU.

Signed-off-by: Ayan Kumar Halder <ayan.kumar.halder@xxxxxxx>
---
 xen/arch/arm/traps.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/xen/arch/arm/traps.c b/xen/arch/arm/traps.c
index aac6c599f8..766aacee77 100644
--- a/xen/arch/arm/traps.c
+++ b/xen/arch/arm/traps.c
@@ -919,12 +919,14 @@ static void _show_registers(const struct cpu_user_regs 
*regs,
 #endif
     }
     printk("  VTCR_EL2: %"PRIregister"\n", READ_SYSREG(VTCR_EL2));
-    printk(" VTTBR_EL2: %016"PRIx64"\n", ctxt->vttbr_el2);
     printk("\n");
 
     printk(" SCTLR_EL2: %"PRIregister"\n", READ_SYSREG(SCTLR_EL2));
     printk("   HCR_EL2: %"PRIregister"\n", READ_SYSREG(HCR_EL2));
+#ifdef CONFIG_MMU
+    printk(" VTTBR_EL2: %016"PRIx64"\n", ctxt->vttbr_el2);
     printk(" TTBR0_EL2: %016"PRIx64"\n", READ_SYSREG64(TTBR0_EL2));
+#endif
     printk("\n");
     printk("   ESR_EL2: %"PRIregister"\n", regs->hsr);
     printk(" HPFAR_EL2: %"PRIregister"\n", READ_SYSREG(HPFAR_EL2));
@@ -956,7 +958,9 @@ void show_registers(const struct cpu_user_regs *regs)
     if ( guest_mode(regs) && is_32bit_domain(current->domain) )
         ctxt.ifsr32_el2 = READ_SYSREG(IFSR32_EL2);
 #endif
+#ifdef CONFIG_MMU
     ctxt.vttbr_el2 = READ_SYSREG64(VTTBR_EL2);
+#endif
 
     _show_registers(regs, &ctxt, guest_mode(regs), current);
 }
-- 
2.25.1