arm64.nobti [ARM64] Unconditionally disable Branch Target
Identification support
- arm64.nopauth [ARM64] Unconditionally disable Pointer Authentication
- support
+ arm64.nomops [ARM64] Unconditionally disable Memory Copy and Memory
+ Set instructions support
arm64.nomte [ARM64] Unconditionally disable Memory Tagging Extension
support
- arm64.nosve [ARM64] Unconditionally disable Scalable Vector
- Extension support
+ arm64.nopauth [ARM64] Unconditionally disable Pointer Authentication
+ support
arm64.nosme [ARM64] Unconditionally disable Scalable Matrix
Extension support
- arm64.nomops [ARM64] Unconditionally disable Memory Copy and Memory
- Set instructions support
+ arm64.nosve [ARM64] Unconditionally disable Scalable Vector
+ Extension support
ataflop= [HW,M68k]
kernel/dma/contiguous.c
cma_pernuma=nn[MG]
- [ARM64,KNL,CMA]
+ [KNL,CMA]
Sets the size of kernel per-numa memory area for
contiguous memory allocations. A value of 0 disables
per-numa CMA altogether. And If this option is not
which is located in node nid, if the allocation fails,
they will fallback to the global default memory area.
+ numa_cma=<node>:nn[MG][,<node>:nn[MG]]
+ [KNL,CMA]
+ Sets the size of kernel numa memory area for
+ contiguous memory allocations. It will reserve CMA
+ area for the specified node.
+
+ With numa CMA enabled, DMA users on node nid will
+ first try to allocate buffer from the numa area
+ which is located in node nid, if the allocation fails,
+ they will fallback to the global default memory area.
+
cmo_free_hint= [PPC] Format: { yes | no }
Specify whether pages are marked as being inactive
when they are freed. This is used in CMO environments
memory region [offset, offset + size] for that kernel
image. If '@offset' is omitted, then a suitable offset
is selected automatically.
- [KNL, X86-64, ARM64] Select a region under 4G first, and
+ [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.
See Documentation/admin-guide/kdump/kdump.rst for further details.
Documentation/admin-guide/kdump/kdump.rst for an example.
crashkernel=size[KMG],high
- [KNL, X86-64, ARM64] 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.
+ [KNL, X86-64, ARM64, RISCV] 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] range under 4G. When crashkernel=X,high
+ [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
size is platform dependent.
--> x86: max(swiotlb_size_or_default() + 8MiB, 256MiB)
--> arm64: 128MiB
+ --> riscv: 128MiB
This one lets the user specify own low range under 4G
for second kernel instead.
0: to disable low allocation.
kvm-intel.flexpriority=
[KVM,Intel] Control KVM's use of FlexPriority feature
- (TPR shadow). Default is 1 (enabled). Disalbe by KVM if
+ (TPR shadow). Default is 1 (enabled). Disable by KVM if
hardware lacks support for it.
kvm-intel.nested=
[KNL,SH] Allow user to override the default size for
per-device physically contiguous DMA buffers.
- memhp_default_state=online/offline
+ memhp_default_state=online/offline/online_kernel/online_movable
[KNL] Set the initial state for the memory hotplug
onlining policy. If not specified, the default value is
set according to the
nohibernate [HIBERNATION] Disable hibernation and resume.
- nohlt [ARM,ARM64,MICROBLAZE,MIPS,SH] Forces the kernel to
+ nohlt [ARM,ARM64,MICROBLAZE,MIPS,PPC,SH] Forces the kernel to
busy wait in do_idle() and not use the arch_cpu_idle()
implementation; requires CONFIG_GENERIC_IDLE_POLL_SETUP
to be effective. This is useful on platforms where the
nosmp [SMP] Tells an SMP kernel to act as a UP kernel,
and disable the IO APIC. legacy for "maxcpus=0".
- nosmt [KNL,MIPS,S390] Disable symmetric multithreading (SMT).
+ nosmt [KNL,MIPS,PPC,S390] Disable symmetric multithreading (SMT).
Equivalent to smt=1.
- [KNL,X86] Disable symmetric multithreading (SMT).
+ [KNL,X86,PPC] Disable symmetric multithreading (SMT).
nosmt=force: Force disable SMT, cannot be undone
via the sysfs control file.
timeout < 0: reboot immediately
Format: <timeout>
- panic_print= Bitmask for printing system info when panic happens.
- User can chose combination of the following bits:
- bit 0: print all tasks info
- bit 1: print system memory info
- bit 2: print timer info
- bit 3: print locks info if CONFIG_LOCKDEP is on
- bit 4: print ftrace buffer
- bit 5: print all printk messages in buffer
- bit 6: print all CPUs backtrace (if available in the arch)
- *Be aware* that this option may print a _lot_ of lines,
- so there are risks of losing older messages in the log.
- Use this option carefully, maybe worth to setup a
- bigger log buffer with "log_buf_len" along with this.
-
panic_on_taint= Bitmask for conditionally calling panic() in add_taint()
Format: <hex>[,nousertaint]
Hexadecimal bitmask representing the set of TAINT flags
panic_on_warn=1 panic() instead of WARN(). Useful to cause kdump
on a WARN().
+ panic_print= Bitmask for printing system info when panic happens.
+ User can chose combination of the following bits:
+ bit 0: print all tasks info
+ bit 1: print system memory info
+ bit 2: print timer info
+ bit 3: print locks info if CONFIG_LOCKDEP is on
+ bit 4: print ftrace buffer
+ bit 5: print all printk messages in buffer
+ bit 6: print all CPUs backtrace (if available in the arch)
+ *Be aware* that this option may print a _lot_ of lines,
+ so there are risks of losing older messages in the log.
+ Use this option carefully, maybe worth to setup a
+ bigger log buffer with "log_buf_len" along with this.
+
parkbd.port= [HW] Parallel port number the keyboard adapter is
connected to, default is 0.
Format: <parport#>
mode 0, bit 1 is for mode 1, and so on. Mode 0 only
allowed by default.
- pause_on_oops=
+ pause_on_oops=<int>
Halt all CPUs after the first oops has been printed for
the specified number of seconds. This is to be used if
your oopses keep scrolling off the screen.
[KNL] Disable ring 3 MONITOR/MWAIT feature on supported
CPUs.
+ riscv_isa_fallback [RISCV]
+ When CONFIG_RISCV_ISA_FALLBACK is not enabled, permit
+ falling back to detecting extension support by parsing
+ "riscv,isa" property on devicetree systems when the
+ replacement properties are not found. See the Kconfig
+ entry for RISCV_ISA_FALLBACK.
+
ro [KNL] Mount root device read-only on boot
rodata= [KNL]
git.samba.org / sfrench / cifs-2.6.git / blobdiff