[PATCH v2 08/40] xen/arm: use PA == VA for EARLY_UART_VIRTUAL_ADDRESS on Armv-8R

[Penny Zheng <Penny.Zheng@xxxxxxx>]

From: Wei Chen <wei.chen@xxxxxxx>

There is no VMSA support on Armv8-R AArch64, so we can not map early
UART to FIXMAP_CONSOLE. Instead, we use PA == VA to define
EARLY_UART_VIRTUAL_ADDRESS on Armv8-R AArch64.

Signed-off-by: Wei Chen <wei.chen@xxxxxxx>
---
1. New patch
---
 xen/arch/arm/include/asm/early_printk.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/xen/arch/arm/include/asm/early_printk.h 
b/xen/arch/arm/include/asm/early_printk.h
index c5149b2976..44a230853f 100644
--- a/xen/arch/arm/include/asm/early_printk.h
+++ b/xen/arch/arm/include/asm/early_printk.h
@@ -15,10 +15,22 @@
 
 #ifdef CONFIG_EARLY_PRINTK
 
+#ifdef CONFIG_ARM_V8R
+
+/*
+ * For Armv-8r, there is not VMSA support in EL2, so we use VA == PA
+ * for EARLY_UART_VIRTUAL_ADDRESS.
+ */
+#define EARLY_UART_VIRTUAL_ADDRESS CONFIG_EARLY_UART_BASE_ADDRESS
+
+#else
+
 /* need to add the uart address offset in page to the fixmap address */
 #define EARLY_UART_VIRTUAL_ADDRESS \
     (FIXMAP_ADDR(FIXMAP_CONSOLE) + (CONFIG_EARLY_UART_BASE_ADDRESS & 
~PAGE_MASK))
 
+#endif /* CONFIG_ARM_V8R */
+
 #endif /* !CONFIG_EARLY_PRINTK */
 
 #endif
-- 
2.25.1