[Xen-devel] [PATCH RFC 1/7] xen: arm: Load xen under 4GB on 32-bit

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

We need to be able to use a 1:1 mapping during bring up.

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
 xen/arch/arm/setup.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
index 4b31623..d0220d9 100644
--- a/xen/arch/arm/setup.c
+++ b/xen/arch/arm/setup.c
@@ -258,6 +258,14 @@ static paddr_t __init get_xen_paddr(void)
             if ( !e )
                 continue;
 
+#ifdef CONFIG_ARM_32
+            /* Xen must be under 4GB */
+            if ( e > 0x100000000ULL )
+                e = 0x100000000ULL;
+            if ( e < bank->start )
+                continue;
+#endif
+
             s = e - min_size;
 
             if ( s > paddr )
-- 
1.8.3.2


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