From 334c388f25707a234c4a0dea05b9df08d7746638 Mon Sep 17 00:00:00 2001 From: Bernhard Beschow Date: Tue, 18 Oct 2022 23:01:41 +0200 Subject: hw/block/pflash_cfi0{1, 2}: Error out if device length isn't a power of two MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit According to the JEDEC standard the device length is communicated to an OS as an exponent (power of two). Signed-off-by: Bernhard Beschow Reviewed-by: Bin Meng Reviewed-by: Philippe Mathieu-Daudé Message-Id: <20221018210146.193159-3-shentey@gmail.com> Signed-off-by: Daniel Henrique Barboza --- hw/block/pflash_cfi01.c | 8 ++++++-- hw/block/pflash_cfi02.c | 5 +++++ 2 files changed, 11 insertions(+), 2 deletions(-) (limited to 'hw') diff --git a/hw/block/pflash_cfi01.c b/hw/block/pflash_cfi01.c index 0cbc2fb..9c235bf 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 2a99b28..ff2fe15 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); -- cgit v1.1