From: Julien Grall <jgr...@amazon.com>
At the moment, Xen will stop processing the Device Tree if a memory
bank is empty (size == 0).
Unfortunately, some of the Device Tree (such as on Colibri imx8qxp)
may contain such a bank. This means Xen will not be able to boot
properly.
Relax the check to just ignore the banks. FWIW this also seems to be the
behavior adopted by Linux.
Reported-by: Daniel Wagner <daniel.wagn...@itk-engineering.de>
Signed-off-by: Julien Grall <jgr...@amazon.com>
---
xen/arch/arm/bootfdt.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/xen/arch/arm/bootfdt.c b/xen/arch/arm/bootfdt.c
index 08fb59f4e7a9..dcff512648a0 100644
--- a/xen/arch/arm/bootfdt.c
+++ b/xen/arch/arm/bootfdt.c
@@ -163,8 +163,9 @@ static int __init process_memory_node(const void *fdt, int
node,
for ( i = 0; i < banks && mem->nr_banks < NR_MEM_BANKS; i++ )
{
device_tree_get_reg(&cell, address_cells, size_cells, &start, &size);
+ /* Some DT may describe empty bank, ignore them */
if ( !size )
- return -EINVAL;
+ continue;
mem->bank[mem->nr_banks].start = start;
mem->bank[mem->nr_banks].size = size;
mem->nr_banks++;
--
2.17.1
