The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
Possible dependencies:
10f6913c548b ("riscv: always honor the CONFIG_CMDLINE_FORCE when parsing dtb") 46ad48e8a28d ("riscv: Add machine name to kernel boot log and stack dump output") 8f3a2b4a96dc ("RISC-V: Move DT mapping outof fixmap") 2d2682512f0f ("riscv: Allow device trees to be built into the kernel") 335b139057ef ("riscv: Add SOC early init support") 20d2292754e7 ("riscv: make sure the cores stay looping in .Lsecondary_park") 6bd33e1ece52 ("riscv: add nommu support") 9e80635619b5 ("riscv: clear the instruction cache and all registers when booting") accb9dbc4aff ("riscv: read the hart ID from mhartid on boot") fcdc65375186 ("riscv: provide native clint access for M-mode") 4f9bbcefa142 ("riscv: add support for MMIO access to the timer registers") 8bf90f320d9a ("riscv: implement remote sfence.i using IPIs") 3b03ac6bbd6e ("riscv: poison SBI calls for M-mode") a4c3733d32a7 ("riscv: abstract out CSR names for supervisor vs machine mode") 0c3ac28931d5 ("riscv: separate MMIO functions into their own header file")
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 10f6913c548b32ecb73801a16b120e761c6957ea Mon Sep 17 00:00:00 2001 From: Wenting Zhang zephray@outlook.com Date: Fri, 8 Jul 2022 16:38:22 -0400 Subject: [PATCH] riscv: always honor the CONFIG_CMDLINE_FORCE when parsing dtb MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit
When CONFIG_CMDLINE_FORCE is enabled, cmdline provided by CONFIG_CMDLINE are always used. This allows CONFIG_CMDLINE to be used regardless of the result of device tree scanning.
This especially fixes the case where a device tree without the chosen node is supplied to the kernel. In such cases, early_init_dt_scan would return true. But inside early_init_dt_scan_chosen, the cmdline won't be updated as there is no chosen node in the device tree. As a result, CONFIG_CMDLINE is not copied into boot_command_line even if CONFIG_CMDLINE_FORCE is enabled. This commit allows properly update boot_command_line in this situation.
Fixes: 8fd6e05c7463 ("arch: riscv: support kernel command line forcing when no DTB passed") Signed-off-by: Wenting Zhang zephray@outlook.com Reviewed-by: Björn Töpel bjorn@kernel.org Reviewed-by: Conor Dooley conor.dooley@microchip.com Link: https://lore.kernel.org/r/PSBPR04MB399135DFC54928AB958D0638B1829@PSBPR04MB39... Cc: stable@vger.kernel.org Signed-off-by: Palmer Dabbelt palmer@rivosinc.com
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c index 2dfc463b86bb..ad76bb59b059 100644 --- a/arch/riscv/kernel/setup.c +++ b/arch/riscv/kernel/setup.c @@ -252,10 +252,10 @@ static void __init parse_dtb(void) pr_info("Machine model: %s\n", name); dump_stack_set_arch_desc("%s (DT)", name); } - return; + } else { + pr_err("No DTB passed to the kernel\n"); }
- pr_err("No DTB passed to the kernel\n"); #ifdef CONFIG_CMDLINE_FORCE strscpy(boot_command_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE); pr_info("Forcing kernel command line to: %s\n", boot_command_line);