Commit 162a5284 authored by Paul Gortmaker's avatar Paul Gortmaker Committed by Thomas Gleixner
Browse files

x86/reboot: Document the "reboot=pci" option 



It is mentioned in the top level non-arch specific file but it was
overlooked here for x86.

Signed-off-by: default avatarPaul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20210530162447.996461-2-paul.gortmaker@windriver.com
parent 36a21d51

Documentation/x86/x86_64/boot-options.rst

+3 −1
Original line number Diff line number Diff line
@@ -126,7 +126,7 @@ Idle loop 
Rebooting

=========



   reboot=b[ios] | t[riple] | k[bd] | a[cpi] | e[fi] [, [w]arm | [c]old]

   reboot=b[ios] | t[riple] | k[bd] | a[cpi] | e[fi] | p[ci] [, [w]arm | [c]old]

      bios

        Use the CPU reboot vector for warm reset

      warm
@@ -145,6 +145,8 @@ Rebooting 
        Use efi reset_system runtime service. If EFI is not configured or

        the EFI reset does not work, the reboot path attempts the reset using

        the keyboard controller.

      pci

        Use a write to the PCI config space register 0xcf9 to trigger reboot.



   Using warm reset will be much faster especially on big memory

   systems because the BIOS will not go through the memory check.