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[Qemu-devel] [PATCH] hw/block: report when pflash backing file isn't ali
From: |
Alex Bennée |
Subject: |
[Qemu-devel] [PATCH] hw/block: report when pflash backing file isn't aligned |
Date: |
Thu, 14 Feb 2019 15:57:14 +0000 |
It looks like there was going to be code to check we had some sort of
alignment so lets replace it with an actual check. This is a bit more
useful than the enigmatic "failed to read the initial flash content"
when we attempt to read the number of bytes the device should have.
This is a potential confusing stumbling block when you move from using
-bios to using -drive if=pflash,file=blob,format=raw,readonly for
loading your firmware code.
Signed-off-by: Alex Bennée <address@hidden>
---
hw/block/pflash_cfi01.c | 19 +++++++++++++------
1 file changed, 13 insertions(+), 6 deletions(-)
diff --git a/hw/block/pflash_cfi01.c b/hw/block/pflash_cfi01.c
index bffb4c40e7..f3251b236c 100644
--- a/hw/block/pflash_cfi01.c
+++ b/hw/block/pflash_cfi01.c
@@ -722,12 +722,19 @@ static void pflash_cfi01_realize(DeviceState *dev, Error
**errp)
}
device_len = sector_len_per_device * blocks_per_device;
- /* XXX: to be fixed */
-#if 0
- if (total_len != (8 * 1024 * 1024) && total_len != (16 * 1024 * 1024) &&
- total_len != (32 * 1024 * 1024) && total_len != (64 * 1024 * 1024))
- return NULL;
-#endif
+ /*
+ * Validate the backing store is the right size for pflash
+ * devices. It has to be padded to a multiple of the flash block
+ * size.
+ */
+ if (pfl->blk) {
+ uint64_t backing_len = blk_getlength(pfl->blk);
+ if (device_len != backing_len) {
+ error_setg(errp, "backing file wrong size "
+ "(%" PRId64 " != %" PRId64")", backing_len, device_len);
+ return;
+ }
+ }
memory_region_init_rom_device(
&pfl->mem, OBJECT(dev),
--
2.20.1
- [Qemu-devel] [PATCH] hw/block: report when pflash backing file isn't aligned,
Alex Bennée <=