[Xen-devel] [PATCH V2] xen/arm64: Use virtual address when setting up early_printk fixmap

[Chen Baozi <baozich@xxxxxxxxx>]

We have already had the boot pagetable when reaching the point
of early_printk fixmap setup. Thus there is no longer necessary
to calculate physical address of xen_fixmap.

Signed-off-by: Chen Baozi <baozich@xxxxxxxxx>
---
 xen/arch/arm/arm64/head.S | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/xen/arch/arm/arm64/head.S b/xen/arch/arm/arm64/head.S
index 75b7ee1..9ed9a93 100644
--- a/xen/arch/arm/arm64/head.S
+++ b/xen/arch/arm/arm64/head.S
@@ -519,8 +519,7 @@ paging:
         cbnz  x22, 1f
 
         /* Add UART to the fixmap table */
-        ldr   x1, =xen_fixmap
-        add   x1, x1, x20            /* x1 := paddr (xen_fixmap) */
+        ldr   x1, =xen_fixmap        /* x1 := vaddr (xen_fixmap) */
         lsr   x2, x23, #THIRD_SHIFT
         lsl   x2, x2, #THIRD_SHIFT   /* 4K aligned paddr of UART */
         mov   x3, #PT_DEV_L3
-- 
2.1.4


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