x86/x86_64/boot-options.rst

1 .. SPDX-License-Identifier: GPL-2.0
4 AMD64 Specific Boot Options
39 		Do not opt-in to Local MCE delivery. Use legacy method
49 		Disable boot machine check logging.
55 		Don't overwrite the bios-set CMCI threshold. This boot option
62 		Force-enable recoverable machine check code paths
73 	Use IO-APIC. Default
76 	Don't use the IO-APIC.
85 	See Documentation/arch/x86/i386/IO-APIC.rst
88 	Don't set up the APIC timer
91 	Don't check the IO-APIC timer. This can work around
147    on reboot so there may be boot problems on some systems.
154      There are some built-in platform specific "quirks" - you may see:
157      newer BIOS, or newer board) using this option will ignore the built-in
164     Only set up a single NUMA node spanning all memory.
170     Don't parse the HMAT table for NUMA setup, or soft-reserved memory
191     Use ACPI boot table parsing, but don't enable ACPI interpreter
197     Set up ACPI SCI interrupt.
217   pci=assign-busses
222     Scan up to NUMBER busses, no matter what the mptable says.
224     Don't use ACPI to set up PCI interrupt routing.
228 Multiple x86-64 PCI-DMA mapping implementations exist, for example:
232       Kernel boot message: "PCI-DMA: Disabling IOMMU"
235       Kernel boot message: "PCI-DMA: using GART IOMMU"
237    3. <arch/x86_64/kernel/pci-swiotlb.c> : Software IOMMU implementation. Used
240       Kernel boot message: "PCI-DMA: Using software bounce buffering
277       Do scatter-gather (SG) merging. Implies "force" (experimental).
279       Don't do scatter-gather (SG) merging.