[PATCH 2/8] hw/sd/sdcard: Add validation for boot-partition-size

[Jan Kiszka]

From: Jan Kiszka <jan.kis...@siemens.com>

Make sure we are not silently rounding down or even wrapping around,
causing inconsistencies with the provided image.

Signed-off-by: Jan Kiszka <jan.kis...@siemens.com>
---
 hw/sd/sd.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/hw/sd/sd.c b/hw/sd/sd.c
index 16aee210b4..834392b0a8 100644
--- a/hw/sd/sd.c
+++ b/hw/sd/sd.c
@@ -2818,6 +2818,16 @@ static void sd_realize(DeviceState *dev, Error **errp)
         }
         blk_set_dev_ops(sd->blk, &sd_block_ops, sd);
     }
+    if (sd->boot_part_size % (128 * KiB) ||
+        sd->boot_part_size > 255 * 128 * KiB) {
+        char *size_str = size_to_str(sd->boot_part_size);
+
+        error_setg(errp, "Invalid boot partition size: %s", size_str);
+        g_free(size_str);
+        error_append_hint(errp,
+                          "The boot partition size must be multiples of 128K"
+                          "and not larger than 32640K.\n");
+    }
 }
 
 static void emmc_realize(DeviceState *dev, Error **errp)
-- 
2.43.0