diff options
| author | Bernhard Beschow <shentey@gmail.com> | 2022-10-18 23:01:41 +0200 |
|---|---|---|
| committer | Daniel Henrique Barboza <danielhb413@gmail.com> | 2022-10-28 13:26:20 -0300 |
| commit | 334c388f25707a234c4a0dea05b9df08d7746638 (patch) | |
| tree | d2867aba34227a42bf102e5e52fc8d7662ed3154 /hw/block | |
| parent | c593d1cc2555c5fe6a6a558f4d2bdc3bfd6713de (diff) | |
hw/block/pflash_cfi0{1, 2}: Error out if device length isn't a power of two
According to the JEDEC standard the device length is communicated to an
OS as an exponent (power of two).
Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20221018210146.193159-3-shentey@gmail.com>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Diffstat (limited to 'hw/block')
| -rw-r--r-- | hw/block/pflash_cfi01.c | 8 | ||||
| -rw-r--r-- | hw/block/pflash_cfi02.c | 5 |
2 files changed, 11 insertions, 2 deletions
diff --git a/hw/block/pflash_cfi01.c b/hw/block/pflash_cfi01.c index 0cbc2fb4cb..9c235bf66e 100644 --- a/hw/block/pflash_cfi01.c +++ b/hw/block/pflash_cfi01.c @@ -690,7 +690,7 @@ static const MemoryRegionOps pflash_cfi01_ops = { .endianness = DEVICE_NATIVE_ENDIAN, }; -static void pflash_cfi01_fill_cfi_table(PFlashCFI01 *pfl) +static void pflash_cfi01_fill_cfi_table(PFlashCFI01 *pfl, Error **errp) { uint64_t blocks_per_device, sector_len_per_device, device_len; int num_devices; @@ -708,6 +708,10 @@ static void pflash_cfi01_fill_cfi_table(PFlashCFI01 *pfl) 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 */ @@ -865,7 +869,7 @@ static void pflash_cfi01_realize(DeviceState *dev, Error **errp) */ pfl->cmd = 0x00; pfl->status = 0x80; /* WSM ready */ - pflash_cfi01_fill_cfi_table(pfl); + pflash_cfi01_fill_cfi_table(pfl, errp); } static void pflash_cfi01_system_reset(DeviceState *dev) diff --git a/hw/block/pflash_cfi02.c b/hw/block/pflash_cfi02.c index 2a99b286b0..ff2fe154c1 100644 --- a/hw/block/pflash_cfi02.c +++ b/hw/block/pflash_cfi02.c @@ -880,6 +880,11 @@ 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); |