| Message ID | tencent_61DFA8E0B13696A3256E538C4BC856633406@qq.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [v2] riscv: dts: Move BUILTIN_DTB_SOURCE to common Kconfig | expand |
On Sat, Feb 24, 2024 at 04:05:07AM +0800, Yangyu Chen wrote: > The BUILTIN_DTB_SOURCE is only configured for K210 before. Since > SOC_BUILTIN_DTB_DECLARE is removed at commit d5805af9fe9f ("riscv: Fix > builtin DTB handling") from patch [1], the kernel cannot choose one of the > dtbs from then on and always take the first one dtb to use. Then, another > commit 0ddd7eaffa64 ("riscv: Fix BUILTIN_DTB for sifive and microchip soc") > from patch [2] supports BUILTIN_DTB_SOURCE for other SoCs. However, this > feature will only work if the Kconfig we use links the dtb we expected in > the first place as mentioned in the thread [3]. Thus, a config > BUILTIN_DTB_SOURCE is needed for all SoCs to choose one dtb to use. > > For some considerations, this patch also removes default y if XIP_KERNEL > for BUILTIN_DTB, as this requires setting a proper dtb to use on the > BUILTIN_DTB_SOURCE, else the kernel with XIP but does not set > BUILTIN_DTB_SOURCE or unselect BUILTIN_DTB will not boot. > > Also, this patch removes the default dtb string for k210 from Kconfig to > nommu_k210_defconfig and nommu_k210_sdcard_defconfig to avoid complex > Kconfig settings for other SoCs in the future. > > Changes since v1: > - remove default y for BULTIN_DTB in any cases > - remove default DTB_SOURCE for k210 and moved to its defconfig file > - remove building dtb object file for other SoCs > - reword help message to say N if unsure for BUILTIN_DTB_SOURCE > - reword commit message > - v1: https://lore.kernel.org/linux-riscv/tencent_AB625442CC1BCFF86E04D7B5891C43719109@qq.com/ This section here (the changelog) should be below the --- line so that it does not get into the commit history. Otherwise Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Cheers, Conor.
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 85c899d0133a..3d6d93d71257 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -1000,7 +1000,19 @@ config RISCV_ISA_FALLBACK config BUILTIN_DTB bool "Built-in device tree" depends on OF && NONPORTABLE - default y if XIP_KERNEL + help + Build a device tree into the Linux image. + This option should be selected if no bootloader is being used. + If unsure, say N. + + +config BUILTIN_DTB_SOURCE + string "Built-in device tree source" + depends on BUILTIN_DTB + help + DTS file path (without suffix, relative to arch/riscv/boot/dts) + for the DTS file that will be used to produce the DTB linked into the + kernel. endmenu # "Boot options" diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs index e08e91c49abe..623de5f8a208 100644 --- a/arch/riscv/Kconfig.socs +++ b/arch/riscv/Kconfig.socs @@ -84,36 +84,4 @@ config SOC_CANAAN help This enables support for Canaan Kendryte K210 SoC platform hardware. -if ARCH_CANAAN - -config ARCH_CANAAN_K210_DTB_BUILTIN - def_bool SOC_CANAAN_K210_DTB_BUILTIN - -config SOC_CANAAN_K210_DTB_BUILTIN - bool "Builtin device tree for the Canaan Kendryte K210" - depends on ARCH_CANAAN - default y - select OF - select BUILTIN_DTB - help - Build a device tree for the Kendryte K210 into the Linux image. - This option should be selected if no bootloader is being used. - If unsure, say Y. - -config ARCH_CANAAN_K210_DTB_SOURCE - string - default SOC_CANAAN_K210_DTB_SOURCE - -config SOC_CANAAN_K210_DTB_SOURCE - string "Source file for the Canaan Kendryte K210 builtin DTB" - depends on ARCH_CANAAN - depends on ARCH_CANAAN_K210_DTB_BUILTIN - default "k210_generic" - help - Base name (without suffix, relative to arch/riscv/boot/dts/canaan) - for the DTS file that will be used to produce the DTB linked into the - kernel. - -endif # ARCH_CANAAN - endmenu # "SoC selection" diff --git a/arch/riscv/boot/dts/Makefile b/arch/riscv/boot/dts/Makefile index 72030fd727af..fdae05bbf556 100644 --- a/arch/riscv/boot/dts/Makefile +++ b/arch/riscv/boot/dts/Makefile @@ -8,4 +8,4 @@ subdir-y += sophgo subdir-y += starfive subdir-y += thead -obj-$(CONFIG_BUILTIN_DTB) := $(addsuffix /, $(subdir-y)) +obj-$(CONFIG_BUILTIN_DTB) := $(addsuffix .dtb.o, $(CONFIG_BUILTIN_DTB_SOURCE)) diff --git a/arch/riscv/boot/dts/canaan/Makefile b/arch/riscv/boot/dts/canaan/Makefile index 520623264c87..987d1f0c41f0 100644 --- a/arch/riscv/boot/dts/canaan/Makefile +++ b/arch/riscv/boot/dts/canaan/Makefile @@ -5,5 +5,3 @@ dtb-$(CONFIG_ARCH_CANAAN) += sipeed_maix_bit.dtb dtb-$(CONFIG_ARCH_CANAAN) += sipeed_maix_dock.dtb dtb-$(CONFIG_ARCH_CANAAN) += sipeed_maix_go.dtb dtb-$(CONFIG_ARCH_CANAAN) += sipeed_maixduino.dtb - -obj-$(CONFIG_ARCH_CANAAN_K210_DTB_BUILTIN) += $(addsuffix .dtb.o, $(CONFIG_ARCH_CANAAN_K210_DTB_SOURCE)) diff --git a/arch/riscv/boot/dts/microchip/Makefile b/arch/riscv/boot/dts/microchip/Makefile index 45adc4926e79..e177815bf1a2 100644 --- a/arch/riscv/boot/dts/microchip/Makefile +++ b/arch/riscv/boot/dts/microchip/Makefile @@ -4,4 +4,3 @@ dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-m100pfsevp.dtb dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-polarberry.dtb dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-sev-kit.dtb dtb-$(CONFIG_ARCH_MICROCHIP_POLARFIRE) += mpfs-tysom-m.dtb -obj-$(CONFIG_BUILTIN_DTB) += $(addsuffix .o, $(dtb-y)) diff --git a/arch/riscv/boot/dts/sifive/Makefile b/arch/riscv/boot/dts/sifive/Makefile index 6a5fbd4ed96a..495bf760a909 100644 --- a/arch/riscv/boot/dts/sifive/Makefile +++ b/arch/riscv/boot/dts/sifive/Makefile @@ -1,4 +1,3 @@ # SPDX-License-Identifier: GPL-2.0 dtb-$(CONFIG_ARCH_SIFIVE) += hifive-unleashed-a00.dtb \ hifive-unmatched-a00.dtb -obj-$(CONFIG_BUILTIN_DTB) += $(addsuffix .o, $(dtb-y)) diff --git a/arch/riscv/configs/nommu_k210_defconfig b/arch/riscv/configs/nommu_k210_defconfig index 146c46d0525b..7e75200543f4 100644 --- a/arch/riscv/configs/nommu_k210_defconfig +++ b/arch/riscv/configs/nommu_k210_defconfig @@ -33,6 +33,8 @@ CONFIG_SMP=y CONFIG_NR_CPUS=2 CONFIG_CMDLINE="earlycon console=ttySIF0" CONFIG_CMDLINE_FORCE=y +CONFIG_BUILTIN_DTB=y +CONFIG_BUILTIN_DTB_SOURCE="canaan/k210_generic" # CONFIG_SECCOMP is not set # CONFIG_STACKPROTECTOR is not set # CONFIG_GCC_PLUGINS is not set diff --git a/arch/riscv/configs/nommu_k210_sdcard_defconfig b/arch/riscv/configs/nommu_k210_sdcard_defconfig index 95d8d1808f19..0ba353e9ca71 100644 --- a/arch/riscv/configs/nommu_k210_sdcard_defconfig +++ b/arch/riscv/configs/nommu_k210_sdcard_defconfig @@ -25,6 +25,8 @@ CONFIG_SMP=y CONFIG_NR_CPUS=2 CONFIG_CMDLINE="earlycon console=ttySIF0 root=/dev/mmcblk0p1 rootwait ro" CONFIG_CMDLINE_FORCE=y +CONFIG_BUILTIN_DTB=y +CONFIG_BUILTIN_DTB_SOURCE="canaan/k210_generic" # CONFIG_SECCOMP is not set # CONFIG_STACKPROTECTOR is not set # CONFIG_GCC_PLUGINS is not set
The BUILTIN_DTB_SOURCE is only configured for K210 before. Since SOC_BUILTIN_DTB_DECLARE is removed at commit d5805af9fe9f ("riscv: Fix builtin DTB handling") from patch [1], the kernel cannot choose one of the dtbs from then on and always take the first one dtb to use. Then, another commit 0ddd7eaffa64 ("riscv: Fix BUILTIN_DTB for sifive and microchip soc") from patch [2] supports BUILTIN_DTB_SOURCE for other SoCs. However, this feature will only work if the Kconfig we use links the dtb we expected in the first place as mentioned in the thread [3]. Thus, a config BUILTIN_DTB_SOURCE is needed for all SoCs to choose one dtb to use. For some considerations, this patch also removes default y if XIP_KERNEL for BUILTIN_DTB, as this requires setting a proper dtb to use on the BUILTIN_DTB_SOURCE, else the kernel with XIP but does not set BUILTIN_DTB_SOURCE or unselect BUILTIN_DTB will not boot. Also, this patch removes the default dtb string for k210 from Kconfig to nommu_k210_defconfig and nommu_k210_sdcard_defconfig to avoid complex Kconfig settings for other SoCs in the future. Changes since v1: - remove default y for BULTIN_DTB in any cases - remove default DTB_SOURCE for k210 and moved to its defconfig file - remove building dtb object file for other SoCs - reword help message to say N if unsure for BUILTIN_DTB_SOURCE - reword commit message - v1: https://lore.kernel.org/linux-riscv/tencent_AB625442CC1BCFF86E04D7B5891C43719109@qq.com/ [1] https://lore.kernel.org/linux-riscv/20201208073355.40828-5-damien.lemoal@wdc.com/ [2] https://lore.kernel.org/linux-riscv/20210604120639.1447869-1-alex@ghiti.fr/ [3] https://lore.kernel.org/linux-riscv/CAK7LNATt_56mO2Le4v4EnPnAfd3gC8S_Sm5-GCsfa=qXy=8Lrg@mail.gmail.com/ Signed-off-by: Yangyu Chen <cyy@cyyself.name> --- arch/riscv/Kconfig | 14 +++++++- arch/riscv/Kconfig.socs | 32 ------------------- arch/riscv/boot/dts/Makefile | 2 +- arch/riscv/boot/dts/canaan/Makefile | 2 -- arch/riscv/boot/dts/microchip/Makefile | 1 - arch/riscv/boot/dts/sifive/Makefile | 1 - arch/riscv/configs/nommu_k210_defconfig | 2 ++ .../riscv/configs/nommu_k210_sdcard_defconfig | 2 ++ 8 files changed, 18 insertions(+), 38 deletions(-)