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authorLinus Torvalds <torvalds@linux-foundation.org>2024-01-19 13:30:49 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2024-01-19 13:30:49 -0800
commit24fdd5189914b36102cb51626a890a2d84501993 (patch)
treeff79d396f2912ae4936c28c3e8fcb703f7f23393 /Documentation/admin-guide
parent9bc44c51a0461e099d4eb5dff86c2d72f0fb4a6c (diff)
parent6e441fa3ac475be73c03c9a85bd305d66ea476a6 (diff)
Merge tag 'loongarch-6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
Pull LoongArch updates from Huacai Chen: - Raise minimum clang version to 18.0.0 - Enable initial Rust support for LoongArch - Add built-in dtb support for LoongArch - Use generic interface to support crashkernel=X,[high,low] - Some bug fixes and other small changes - Update the default config file. * tag 'loongarch-6.8' of git://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson: (22 commits) MAINTAINERS: Add BPF JIT for LOONGARCH entry LoongArch: Update Loongson-3 default config file LoongArch: BPF: Prevent out-of-bounds memory access LoongArch: BPF: Support 64-bit pointers to kfuncs LoongArch: Fix definition of ftrace_regs_set_instruction_pointer() LoongArch: Use generic interface to support crashkernel=X,[high,low] LoongArch: Fix and simplify fcsr initialization on execve() LoongArch: Let cores_io_master cover the largest NR_CPUS LoongArch: Change SHMLBA from SZ_64K to PAGE_SIZE LoongArch: Add a missing call to efi_esrt_init() LoongArch: Parsing CPU-related information from DTS LoongArch: dts: DeviceTree for Loongson-2K2000 LoongArch: dts: DeviceTree for Loongson-2K1000 LoongArch: dts: DeviceTree for Loongson-2K0500 LoongArch: Allow device trees be built into the kernel dt-bindings: interrupt-controller: loongson,liointc: Fix dtbs_check warning for interrupt-names dt-bindings: interrupt-controller: loongson,liointc: Fix dtbs_check warning for reg-names dt-bindings: loongarch: Add Loongson SoC boards compatibles dt-bindings: loongarch: Add CPU bindings for LoongArch LoongArch: Enable initial Rust support ...
Diffstat (limited to 'Documentation/admin-guide')
-rw-r--r--Documentation/admin-guide/kernel-parameters.txt24
1 files changed, 13 insertions, 11 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index 2e76c3476e2a..31b3a25680d0 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -888,9 +888,9 @@
memory region [offset, offset + size] for that kernel
image. If '@offset' is omitted, then a suitable offset
is selected automatically.
- [KNL, X86-64, ARM64, RISCV] Select a region under 4G first, and
- fall back to reserve region above 4G when '@offset'
- hasn't been specified.
+ [KNL, X86-64, ARM64, RISCV, LoongArch] Select a region
+ under 4G first, and fall back to reserve region above
+ 4G when '@offset' hasn't been specified.
See Documentation/admin-guide/kdump/kdump.rst for further details.
crashkernel=range1:size1[,range2:size2,...][@offset]
@@ -901,25 +901,27 @@
Documentation/admin-guide/kdump/kdump.rst for an example.
crashkernel=size[KMG],high
- [KNL, X86-64, ARM64, RISCV] range could be above 4G.
+ [KNL, X86-64, ARM64, RISCV, LoongArch] range could be
+ above 4G.
Allow kernel to allocate physical memory region from top,
so could be above 4G if system have more than 4G ram
installed. Otherwise memory region will be allocated
below 4G, if available.
It will be ignored if crashkernel=X is specified.
crashkernel=size[KMG],low
- [KNL, X86-64, ARM64, RISCV] range under 4G. When crashkernel=X,high
- is passed, kernel could allocate physical memory region
- above 4G, that cause second kernel crash on system
- that require some amount of low memory, e.g. swiotlb
- requires at least 64M+32K low memory, also enough extra
- low memory is needed to make sure DMA buffers for 32-bit
- devices won't run out. Kernel would try to allocate
+ [KNL, X86-64, ARM64, RISCV, LoongArch] range under 4G.
+ When crashkernel=X,high is passed, kernel could allocate
+ physical memory region above 4G, that cause second kernel
+ crash on system that require some amount of low memory,
+ e.g. swiotlb requires at least 64M+32K low memory, also
+ enough extra low memory is needed to make sure DMA buffers
+ for 32-bit devices won't run out. Kernel would try to allocate
default size of memory below 4G automatically. The default
size is platform dependent.
--> x86: max(swiotlb_size_or_default() + 8MiB, 256MiB)
--> arm64: 128MiB
--> riscv: 128MiB
+ --> loongarch: 128MiB
This one lets the user specify own low range under 4G
for second kernel instead.
0: to disable low allocation.