amd_iommu= [HW, X86-64] Pass parameters to the AMD IOMMU driver in the system.
Possible values are: fullflush - enable flushing of IO/TLB entries when they are unmapped.
Some firmware have broken 64 bit addresses for force ACPI ignore these and use the older legacy 32 bit addresses.
acpi_mask_gpe= [HW, ACPI] Due to the existence of _Lxx/_Exx, some GPEs triggered by unsupported hardware/firmware features can result in GPE floodings that cannot be automatically disabled by the GPE dispatcher. acpi_no_static_ssdt [HW, ACPI] Disable installation of static SSDTs at early boot time By default, SSDTs contained in the RSDT/XSDT will be installed automatically and they will appear under /sys/firmware/acpi/tables. Note that specifying this option does not affect dynamic table installation which will install SSDT tables to /sys/firmware/acpi/tables/dynamic.
This facility can be used to prevent such uncontrolled GPE floodings. acpi_rsdp= [ACPI, EFI, KEXEC] Pass the RSDP address to the kernel, mostly used on machines running EFI runtime service to boot the second kernel for kdump.
align_va_addr= [X86-64] Align virtual addresses by clearing slice  when allocating a VMA at process creation time.
This option gives you up to 3% performance improvement on AMD F15h machines (where it is enabled by default) for a CPU-intensive style benchmark, and it can vary highly in a microbenchmark depending on workload and compiler.
Format: Support masking of GPEs numbered from 0x00 to 0x7f. acpi_os_name= [HW, ACPI] Tell ACPI BIOS the name of the OS Format: To spoof as Windows 98: ="Microsoft Windows" acpi_rev_override [ACPI] Override the _REV object to return 5 (instead of 2 which is mandated by ACPI 6) as the supported ACPI specification revision (when using this switch, it may be necessary to carry out a cold reboot in a row to make it take effect on the platform firmware). # disable all built-in OS vendor strings acpi_osi=!!