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[Xen-devel] [RFC 15/19] xen/arm: Reserve region in guest memory for device passthrough

This region will be split by the toolstack to allocate MMIO range for eac

For now only reserve a 512MB region, this should be enought to passthrough
multiple device at the same time.

Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
 xen/include/public/arch-arm.h |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/xen/include/public/arch-arm.h b/xen/include/public/arch-arm.h
index ac54cd6..789bffb 100644
--- a/xen/include/public/arch-arm.h
+++ b/xen/include/public/arch-arm.h
@@ -369,6 +369,10 @@ typedef uint64_t xen_callback_t;
 #define GUEST_GICC_BASE   0x03002000ULL
 #define GUEST_GICC_SIZE   0x00000100ULL
+/* Space for mapping MMIO from device passthrough: 512MB @ 256MB*/
+#define GUEST_MMIO_BASE   0x10000000ULL
+#define GUEST_MMIO_SIZE   0x20000000ULL
 /* 16MB == 4096 pages reserved for guest to use as a region to map its
  * grant table in.

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