Commit be3a5b0e authored by Randy Dunlap's avatar Randy Dunlap Committed by Jonathan Corbet
Browse files

Doc: admin-guide: use correct legends in kernel-parameters.txt 



Documentation/admin-guide/kernel-parameters.rst includes a legend
telling us what configurations or hardware platforms are relevant
for certain boot options.  For X86, it is spelled "X86" and for
x86_64, it is spelled "X86-64", so make corrections for those.

Signed-off-by: default avatarRandy Dunlap <rdunlap@infradead.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: x86@kernel.org
Link: https://lore.kernel.org/r/20200810024941.30231-1-rdunlap@infradead.org


Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent f30c3ff3

Documentation/admin-guide/kernel-parameters.txt

+18 −18
Original line number Original line Diff line number Diff line
@@ -719,7 +719,7 @@ 
			memory region [offset, offset + size] for that kernel

			memory region [offset, offset + size] for that kernel

			image. If '@offset' is omitted, then a suitable offset

			image. If '@offset' is omitted, then a suitable offset

			is selected automatically.

			is selected automatically.

			[KNL, x86_64] select a region under 4G first, and

			[KNL, X86-64] Select a region under 4G first, and

			fall back to reserve region above 4G when '@offset'

			fall back to reserve region above 4G when '@offset'

			hasn't been specified.

			hasn't been specified.

			See Documentation/admin-guide/kdump/kdump.rst for further details.

			See Documentation/admin-guide/kdump/kdump.rst for further details.
@@ -732,14 +732,14 @@ 
			Documentation/admin-guide/kdump/kdump.rst for an example.

			Documentation/admin-guide/kdump/kdump.rst for an example.





	crashkernel=size[KMG],high

	crashkernel=size[KMG],high

			[KNL, x86_64] range could be above 4G. Allow kernel

			[KNL, X86-64] range could be above 4G. Allow kernel

			to allocate physical memory region from top, so could

			to allocate physical memory region from top, so could

			be above 4G if system have more than 4G ram installed.

			be above 4G if system have more than 4G ram installed.

			Otherwise memory region will be allocated below 4G, if

			Otherwise memory region will be allocated below 4G, if

			available.

			available.

			It will be ignored if crashkernel=X is specified.

			It will be ignored if crashkernel=X is specified.

	crashkernel=size[KMG],low

	crashkernel=size[KMG],low

			[KNL, x86_64] range under 4G. When crashkernel=X,high

			[KNL, X86-64] range under 4G. When crashkernel=X,high

			is passed, kernel could allocate physical memory region

			is passed, kernel could allocate physical memory region

			above 4G, that cause second kernel crash on system

			above 4G, that cause second kernel crash on system

			that require some amount of low memory, e.g. swiotlb

			that require some amount of low memory, e.g. swiotlb
@@ -1403,7 +1403,7 @@ 




	gamma=		[HW,DRM]

	gamma=		[HW,DRM]





	gart_fix_e820=	[X86_64] disable the fix e820 for K8 GART

	gart_fix_e820=	[X86-64] disable the fix e820 for K8 GART

			Format: off | on

			Format: off | on

			default: on

			default: on
@@ -1790,7 +1790,7 @@ 
			Format: 0 | 1

			Format: 0 | 1

			Default set by CONFIG_INIT_ON_FREE_DEFAULT_ON.

			Default set by CONFIG_INIT_ON_FREE_DEFAULT_ON.





	init_pkru=	[x86] Specify the default memory protection keys rights

	init_pkru=	[X86] Specify the default memory protection keys rights

			register contents for all processes.  0x55555554 by

			register contents for all processes.  0x55555554 by

			default (disallow access to all but pkey 0).  Can

			default (disallow access to all but pkey 0).  Can

			override in debugfs after boot.

			override in debugfs after boot.
@@ -1798,7 +1798,7 @@ 
	inport.irq=	[HW] Inport (ATI XL and Microsoft) busmouse driver

	inport.irq=	[HW] Inport (ATI XL and Microsoft) busmouse driver

			Format: <irq>

			Format: <irq>





	int_pln_enable	[x86] Enable power limit notification interrupt

	int_pln_enable	[X86] Enable power limit notification interrupt





	integrity_audit=[IMA]

	integrity_audit=[IMA]

			Format: { "0" | "1" }

			Format: { "0" | "1" }
@@ -1816,7 +1816,7 @@ 
			bypassed by not enabling DMAR with this option. In

			bypassed by not enabling DMAR with this option. In

			this case, gfx device will use physical address for

			this case, gfx device will use physical address for

			DMA.

			DMA.

		forcedac [x86_64]

		forcedac [X86-64]

			With this option iommu will not optimize to look

			With this option iommu will not optimize to look

			for io virtual address below 32-bit forcing dual

			for io virtual address below 32-bit forcing dual

			address cycle on pci bus for cards supporting greater

			address cycle on pci bus for cards supporting greater
@@ -1901,7 +1901,7 @@ 
		strict	regions from userspace.

		strict	regions from userspace.

		relaxed

		relaxed





	iommu=		[x86]

	iommu=		[X86]

		off

		off

		force

		force

		noforce

		noforce
@@ -1911,8 +1911,8 @@ 
		merge

		merge

		nomerge

		nomerge

		soft

		soft

		pt		[x86]

		pt		[X86]

		nopt		[x86]

		nopt		[X86]

		nobypass	[PPC/POWERNV]

		nobypass	[PPC/POWERNV]

			Disable IOMMU bypass, using IOMMU for PCI devices.

			Disable IOMMU bypass, using IOMMU for PCI devices.
@@ -2055,21 +2055,21 @@ 




	iucv=		[HW,NET]

	iucv=		[HW,NET]





	ivrs_ioapic	[HW,X86_64]

	ivrs_ioapic	[HW,X86-64]

			Provide an override to the IOAPIC-ID<->DEVICE-ID

			Provide an override to the IOAPIC-ID<->DEVICE-ID

			mapping provided in the IVRS ACPI table. For

			mapping provided in the IVRS ACPI table. For

			example, to map IOAPIC-ID decimal 10 to

			example, to map IOAPIC-ID decimal 10 to

			PCI device 00:14.0 write the parameter as:

			PCI device 00:14.0 write the parameter as:

				ivrs_ioapic[10]=00:14.0

				ivrs_ioapic[10]=00:14.0





	ivrs_hpet	[HW,X86_64]

	ivrs_hpet	[HW,X86-64]

			Provide an override to the HPET-ID<->DEVICE-ID

			Provide an override to the HPET-ID<->DEVICE-ID

			mapping provided in the IVRS ACPI table. For

			mapping provided in the IVRS ACPI table. For

			example, to map HPET-ID decimal 0 to

			example, to map HPET-ID decimal 0 to

			PCI device 00:14.0 write the parameter as:

			PCI device 00:14.0 write the parameter as:

				ivrs_hpet[0]=00:14.0

				ivrs_hpet[0]=00:14.0





	ivrs_acpihid	[HW,X86_64]

	ivrs_acpihid	[HW,X86-64]

			Provide an override to the ACPI-HID:UID<->DEVICE-ID

			Provide an override to the ACPI-HID:UID<->DEVICE-ID

			mapping provided in the IVRS ACPI table. For

			mapping provided in the IVRS ACPI table. For

			example, to map UART-HID:UID AMD0020:0 to

			example, to map UART-HID:UID AMD0020:0 to
@@ -2346,7 +2346,7 @@ 
	lapic		[X86-32,APIC] Enable the local APIC even if BIOS

	lapic		[X86-32,APIC] Enable the local APIC even if BIOS

			disabled it.

			disabled it.





	lapic=		[x86,APIC] "notscdeadline" Do not use TSC deadline

	lapic=		[X86,APIC] "notscdeadline" Do not use TSC deadline

			value for LAPIC timer one-shot implementation. Default

			value for LAPIC timer one-shot implementation. Default

			back to the programmable timer unit in the LAPIC.

			back to the programmable timer unit in the LAPIC.
@@ -3162,12 +3162,12 @@ 
			register save and restore. The kernel will only save

			register save and restore. The kernel will only save

			legacy floating-point registers on task switch.

			legacy floating-point registers on task switch.





	nohugeiomap	[KNL,x86,PPC] Disable kernel huge I/O mappings.

	nohugeiomap	[KNL,X86,PPC] Disable kernel huge I/O mappings.





	nosmt		[KNL,S390] Disable symmetric multithreading (SMT).

	nosmt		[KNL,S390] Disable symmetric multithreading (SMT).

			Equivalent to smt=1.

			Equivalent to smt=1.





			[KNL,x86] Disable symmetric multithreading (SMT).

			[KNL,X86] Disable symmetric multithreading (SMT).

			nosmt=force: Force disable SMT, cannot be undone

			nosmt=force: Force disable SMT, cannot be undone

				     via the sysfs control file.

				     via the sysfs control file.
@@ -3929,7 +3929,7 @@ 
	pt.		[PARIDE]

	pt.		[PARIDE]

			See Documentation/admin-guide/blockdev/paride.rst.

			See Documentation/admin-guide/blockdev/paride.rst.





	pti=		[X86_64] Control Page Table Isolation of user and

	pti=		[X86-64] Control Page Table Isolation of user and

			kernel address spaces.  Disabling this feature

			kernel address spaces.  Disabling this feature

			removes hardening, but improves performance of

			removes hardening, but improves performance of

			system calls and interrupts.

			system calls and interrupts.
@@ -3941,7 +3941,7 @@ 




			Not specifying this option is equivalent to pti=auto.

			Not specifying this option is equivalent to pti=auto.





	nopti		[X86_64]

	nopti		[X86-64]

			Equivalent to pti=off

			Equivalent to pti=off





	pty.legacy_count=

	pty.legacy_count=