Rebooting
reboot=b[ios] | t[riple] | k[bd] [, [w]arm | [c]old]
- bios Use the CPU reboto vector for warm reset
+ bios Use the CPU reboot vector for warm reset
warm Don't set the cold reboot flag
cold Set the cold reboot flag
triple Force a triple fault (init)
IOMMU
iommu=[size][,noagp][,off][,force][,noforce][,leak][,memaper[=order]][,merge]
- [,forcesac][,fullflush][,nomerge][,noaperture]
+ [,forcesac][,fullflush][,nomerge][,noaperture][,calgary]
size set size of iommu (in bytes)
noagp don't initialize the AGP driver and use full aperture.
off don't use the IOMMU
allowed overwrite iommu off workarounds for specific chipsets.
soft Use software bounce buffering (default for Intel machines)
noaperture Don't touch the aperture for AGP.
+ allowdac Allow DMA >4GB
+ When off all DMA over >4GB is forced through an IOMMU or bounce
+ buffering.
+ nodac Forbid DMA >4GB
+ panic Always panic when IOMMU overflows
+ calgary Use the Calgary IOMMU if it is available
swiotlb=pages[,force]
newfallback: use new unwinder but fall back to old if it gets
stuck (default)
+ call_trace=[old|both|newfallback|new]
+ old: use old inexact backtracer
+ new: use new exact dwarf2 unwinder
+ both: print entries from both
+ newfallback: use new unwinder but fall back to old if it gets
+ stuck (default)
+
Misc
noreplacement Don't replace instructions with more appropriate ones