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| author | Paul Gortmaker <paul.gortmaker@windriver.com> | 2021-05-30 12:24:45 -0400 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2021-08-12 12:06:58 +0200 |
| commit | 162a5284faf41b2441b8f686f9ac4771c7a8f669 (patch) | |
| tree | 60a76421eda67c722d841c631f3f0231932f2f26 /Documentation/x86 | |
| parent | 36a21d51725af2ce0700c6ebcb6b9594aac658a6 (diff) | |
| download | linux-162a5284faf41b2441b8f686f9ac4771c7a8f669.tar.bz2 | |
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: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20210530162447.996461-2-paul.gortmaker@windriver.com
Diffstat (limited to 'Documentation/x86')
| -rw-r--r-- | Documentation/x86/x86_64/boot-options.rst | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/x86/x86_64/boot-options.rst b/Documentation/x86/x86_64/boot-options.rst index 5f62b3b86357..482f3b29f99a 100644 --- a/Documentation/x86/x86_64/boot-options.rst +++ b/Documentation/x86/x86_64/boot-options.rst @@ -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. |