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Subject[PATCH 1/3] x86/reboot: document the "reboot=pci" option
Date
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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