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Revert "hw/block/pflash_cfi: Error out if dev length isn't power of 2"

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Commit 334c388f25 ("pflash_cfi: Error out if device length
isn't a power of two") aimed to finish the effort started by
commit 06f1521795 ("pflash: Require backend size to match device,
improve errors"), but unfortunately we are not quite there since
various machines are still ready to accept incomplete / oversized
pflash backend images, and now fail, i.e. on Debian bullseye:

 $ qemu-system-x86_64 \
   -drive \
   if=pflash,format=raw,unit=0,readonly=on,file=/usr/share/OVMF/OVMF_CODE.fd
 qemu-system-x86_64: Device size must be a power of two.

where OVMF_CODE.fd comes from the ovmf package, which doesn't
pad the firmware images to the flash size:

 $ ls -lh /usr/share/OVMF/
 -rw-r--r-- 1 root root 3.5M Aug 19  2021 OVMF_CODE_4M.fd
 -rw-r--r-- 1 root root 1.9M Aug 19  2021 OVMF_CODE.fd
 -rw-r--r-- 1 root root 128K Aug 19  2021 OVMF_VARS.fd

Since we entered the freeze period to prepare the v7.2.0 release,
the safest is to revert commit 334c388f25.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1294
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221108175755.95141-1-philmd@linaro.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20221108172633.860700-1-danielhb413@gmail.com>
This commit is contained in:
Daniel Henrique Barboza 2022-11-08 15:00:32 +01:00 committed by Stefan Hajnoczi
parent f9c307c3f9
commit ef7716cacc
2 changed files with 2 additions and 11 deletions
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8
hw/block/pflash_cfi01.c
View file

@ -690,7 +690,7 @@ static const MemoryRegionOps pflash_cfi01_ops = {
.endianness = DEVICE_NATIVE_ENDIAN,
};
static void pflash_cfi01_fill_cfi_table(PFlashCFI01 *pfl, Error **errp)
static void pflash_cfi01_fill_cfi_table(PFlashCFI01 *pfl)
{
uint64_t blocks_per_device, sector_len_per_device, device_len;
int num_devices;
@ -708,10 +708,6 @@ static void pflash_cfi01_fill_cfi_table(PFlashCFI01 *pfl, Error **errp)
sector_len_per_device = pfl->sector_len / num_devices;
}
device_len = sector_len_per_device * blocks_per_device;
if (!is_power_of_2(device_len)) {
error_setg(errp, "Device size must be a power of two.");
return;
}
/* Hardcoded CFI table */
/* Standard "QRY" string */
@ -869,7 +865,7 @@ static void pflash_cfi01_realize(DeviceState *dev, Error **errp)
*/
pfl->cmd = 0x00;
pfl->status = 0x80; /* WSM ready */
pflash_cfi01_fill_cfi_table(pfl, errp);
pflash_cfi01_fill_cfi_table(pfl);
}
static void pflash_cfi01_system_reset(DeviceState *dev)

5
hw/block/pflash_cfi02.c
View file

@ -880,11 +880,6 @@ static void pflash_cfi02_realize(DeviceState *dev, Error **errp)
return;
}
if (!is_power_of_2(pfl->chip_len)) {
error_setg(errp, "Device size must be a power of two.");
return;
}
memory_region_init_rom_device(&pfl->orig_mem, OBJECT(pfl),
&pflash_cfi02_ops, pfl, pfl->name,
pfl->chip_len, errp);