Messages in this thread Patch in this message |  | | From | Paul Gortmaker <> | Subject | [PATCH 1/3] x86/reboot: document the "reboot=pci" option | Date | Sun, 30 May 2021 12:24:45 -0400 |
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It is mentioned in the top level non-arch specific file but it was overlooked here for x86.
Cc: Borislav Petkov <bp@alien8.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: x86@kernel.org Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> --- Documentation/x86/x86_64/boot-options.rst | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/Documentation/x86/x86_64/boot-options.rst b/Documentation/x86/x86_64/boot-options.rst index 324cefff92e7..2d2810409cc8 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. -- 2.25.1
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