git: 546d925cb44f - main - ichwd: Add manual for i6300esb watchdog

The branch main has been updated by aokblast:

URL: https://cgit.FreeBSD.org/src/commit/?id=546d925cb44f1da7efee76bfebb42df8fdbc83a8

commit 546d925cb44f1da7efee76bfebb42df8fdbc83a8
Author:     ShengYi Hung <aokblast@FreeBSD.org>
AuthorDate: 2026-01-03 06:12:26 +0000
Commit:     ShengYi Hung <aokblast@FreeBSD.org>
CommitDate: 2026-03-04 13:51:13 +0000

    ichwd: Add manual for i6300esb watchdog
    
    Reviewed by:    ziaee, mhorne
    Approved by:    lwhsu (mentor)
    MFC after:      2 weeks
    Sponsored by:   The FreeBSD Foundation
    Differential Revision: https://reviews.freebsd.org/D54466
---
 share/man/man4/ichwd.4 | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/share/man/man4/ichwd.4 b/share/man/man4/ichwd.4
index cc6924f7f866..25de73778d36 100644
--- a/share/man/man4/ichwd.4
+++ b/share/man/man4/ichwd.4
@@ -23,7 +23,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd August 20, 2008
+.Dd January 3, 2026
 .Dt ICHWD 4
 .Os
 .Sh NAME
@@ -55,6 +55,16 @@ The ICH WDT counts down in ticks of approximately 0.6 seconds; the
 exact value depends on hardware quality and environmental factors.
 Supported watchdog intervals range from 2 to 63 ticks.
 .Pp
+In QEMU, there is a dedicated watchdog implementation for x86
+systems based on the Intel 6300ESB controller hub.
+Support for this watchdog is provided by this kernel module.
+.Pp
+Optionally, set the
+.Va hw.i6300esbwd.x.locked=1
+.Xr sysctl 8
+to prevent users from disabling the watchdog timeout check
+after it has been enabled.
+.Pp
 Note that on some ICH-based systems, the WDT may be present but
 disabled, either in hardware or by the BIOS.
 The