efi_loader: Add mem-mapped for fallback
When we don't have a real device/image path, such as 'bootefi hello',
construct a mem-mapped device-path.
This fixes 'bootefi hello' after devicepath refactoring.
Fixes: 95c5553ea2 ("efi_loader: refactor boot device and loaded_image handling")
Signed-off-by: Rob Clark <robdclark@gmail.com>
Acked-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/lib/efi_loader/efi_device_path.c b/lib/efi_loader/efi_device_path.c
index 5d5c3b3..f6e368e 100644
--- a/lib/efi_loader/efi_device_path.c
+++ b/lib/efi_loader/efi_device_path.c
@@ -538,6 +538,30 @@
}
#endif
+/* Construct a device-path for memory-mapped image */
+struct efi_device_path *efi_dp_from_mem(uint32_t memory_type,
+ uint64_t start_address,
+ uint64_t end_address)
+{
+ struct efi_device_path_memory *mdp;
+ void *buf, *start;
+
+ start = buf = dp_alloc(sizeof(*mdp) + sizeof(END));
+
+ mdp = buf;
+ mdp->dp.type = DEVICE_PATH_TYPE_HARDWARE_DEVICE;
+ mdp->dp.sub_type = DEVICE_PATH_SUB_TYPE_MEMORY;
+ mdp->dp.length = sizeof(*mdp);
+ mdp->memory_type = memory_type;
+ mdp->start_address = start_address;
+ mdp->end_address = end_address;
+ buf = &mdp[1];
+
+ *((struct efi_device_path *)buf) = END;
+
+ return start;
+}
+
/*
* Helper to split a full device path (containing both device and file
* parts) into it's constituent parts.