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Tue, 08 Nov 2022 10:34:09 -0800 (PST) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Cc: Bin Meng , Hanna Reitz , David Hildenbrand , Kevin Wolf , qemu-block@nongnu.org, Peter Xu , Paolo Bonzini , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Daniel Henrique Barboza Subject: [PULL 3/3] Revert "hw/block/pflash_cfi: Error out if dev length isn't power of 2" Date: Tue, 8 Nov 2022 19:33:52 +0100 Message-Id: <20221108183352.9466-4-philmd@linaro.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221108183352.9466-1-philmd@linaro.org> References: <20221108183352.9466-1-philmd@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::332; envelope-from=philmd@linaro.org; helo=mail-wm1-x332.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: qemu-devel-bounces+patch=linaro.org@nongnu.org From: Daniel Henrique Barboza 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 334c388f25707a234c4a0dea05b9df08d. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1294 Signed-off-by: Philippe Mathieu-Daudé Message-Id: <20221108175755.95141-1-philmd@linaro.org> Signed-off-by: Daniel Henrique Barboza Message-Id: <20221108172633.860700-1-danielhb413@gmail.com> --- hw/block/pflash_cfi01.c | 8 ++------ hw/block/pflash_cfi02.c | 5 ----- 2 files changed, 2 insertions(+), 11 deletions(-) diff --git a/hw/block/pflash_cfi01.c b/hw/block/pflash_cfi01.c index 9c235bf66e..0cbc2fb4cb 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, 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) diff --git a/hw/block/pflash_cfi02.c b/hw/block/pflash_cfi02.c index ff2fe154c1..2a99b286b0 100644 --- a/hw/block/pflash_cfi02.c +++ b/hw/block/pflash_cfi02.c @@ -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);