[Xen-devel] [PATCH] [IOEMU] [IA64] Fix memory size calculation on VT-i over 3GB memory

["KUWAMURA Shin'ya" <kuwa@xxxxxxxxxxxxxx>]

Hi,

VT-i domains have two memory holes: VGA I/O (under 1MB) and MMIO
(3GB-4GB). This patch calculates the correct memory size with them.

# This is based on xen-unstable 10936:a0b3cf802d99.

Original patch by Zhang xiantao <xiantao.zhang@xxxxxxxxx>
Signed-off-by: KUWAMURA Shin'ya <kuwa@xxxxxxxxxxxxxx>

Best regards,
-- 
  KUWAMURA Shin'ya

diff --git a/vl.c b/vl.c
index 120b607..b97435f 100644
--- a/vl.c
+++ b/vl.c
@@ -8670,6 +8670,14 @@ int main(int argc, char **argv)
     }
 
 #endif
+
+#if defined (__ia64__)
+    if (ram_size > VGA_IO_START)
+        ram_size += VGA_IO_SIZE; /* skip VGA I/O hole */
+    if (ram_size > MMIO_START)
+        ram_size += 1 * MEM_G; /* skip 3G-4G MMIO, LEGACY_IO_SPACE etc. */
+#endif
+
     /* init the memory */
     phys_ram_size = machine->ram_require & ~RAMSIZE_FIXED;
 

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