Bump Linux Kernel to v6.12

[Cuda-Chen]

Linux Kernel v6.7 propose a solution to resolve sound stutter effect. Therefore, upgrade Linux Kernel version to v6.12 as it is an LTS version with the proposed solution included.

Also, this commit disables the following RISC-V platform specific settings in Linux Kernel compilation configuration:

1. Zawrs extension support for more efficient busy waiting.
2. Zba extension support for bit manipulation instructions.
3. Zbb extension support for bit manipulation instructions.
4. Zbc extension support for carry-less multiplication instructions.
5. Zicbom extension support for non-coherent DMA operation.
6. Zicboz extension support for faster zeroing of memory.
7. Vendor extensions support (including Andes).

[jserv]

Refresh Linux kernel configurations accordingly.

[Cuda-Chen]

Refresh Linux kernel configurations accordingly.

While fixing, I would like to ask whether the "Linux kernel configuration" is meant buildroot, or some attributes in configs/linux.confg should be updated?

[jserv]

I would like to ask whether the "Linux kernel configuration" is meant buildroot, or some attributes in configs/linux.confg should be updated?

You should update configs/linux.config with the GNU toolchain built with buildroot.

[jserv]

After running scripts/build-image.sh, change the directory to linux and run diff -u .config.old .config. Then, review the kernel configurations as well.

[jserv]

The following can be excluded (Platform type):

• Zawrs extension support for more efficient busy waiting
• Zba extension support for bit manipulation instructions
• Zbb extension support for bit manipulation instructions
• Zbc extension support for carry-less multiplication instructions
• Zicbom extension support for non-coherent DMA operation
• Zicboz extension support for faster zeroing of memory
• Vendor extensions ---> Andes ---> Andes vendor extension support

Kernel configuration changes:

@@ -293,15 +293,15 @@
 CONFIG_RISCV_ALTERNATIVE=y
 # CONFIG_RISCV_ISA_C is not set
 CONFIG_TOOLCHAIN_HAS_V=y
-CONFIG_RISCV_ISA_ZAWRS=y
+# CONFIG_RISCV_ISA_ZAWRS is not set
 CONFIG_TOOLCHAIN_HAS_ZBB=y
 CONFIG_TOOLCHAIN_HAS_VECTOR_CRYPTO=y
-CONFIG_RISCV_ISA_ZBA=y
-CONFIG_RISCV_ISA_ZBB=y
+# CONFIG_RISCV_ISA_ZBA is not set
+# CONFIG_RISCV_ISA_ZBB is not set
 CONFIG_TOOLCHAIN_HAS_ZBC=y
-CONFIG_RISCV_ISA_ZBC=y
+# CONFIG_RISCV_ISA_ZBC is not set
 # CONFIG_RISCV_ISA_ZICBOM is not set
-CONFIG_RISCV_ISA_ZICBOZ=y
+# CONFIG_RISCV_ISA_ZICBOZ is not set
 CONFIG_TOOLCHAIN_NEEDS_EXPLICIT_ZICSR_ZIFENCEI=y
 # CONFIG_FPU is not set
 CONFIG_IRQ_STACKS=y
@@ -315,12 +315,11 @@
 #
 # Vendor extensions
 #
-CONFIG_RISCV_ISA_VENDOR_EXT=y
 
 #
 # Andes
 #
-CONFIG_RISCV_ISA_VENDOR_EXT_ANDES=y
+# CONFIG_RISCV_ISA_VENDOR_EXT_ANDES is not set
 # end of Andes
 # end of Vendor extensions
 # end of Platform type

[jserv]

Refine git commit messages to denote the exclusion of recent RISC-V extensions.

[jserv]

Thank @Cuda-Chen for contributing!