On Wed, 18 Feb 2026 19:10:02 +0000 Peter Maydell <[email protected]> wrote:
> On Fri, 6 Feb 2026 at 13:14, Igor Mammedov <[email protected]> wrote: > > > > Windows doesn't ship built-in TCO watchdog driver, and users are > > forced to install vendor specific driver(s) if such exists. > > However OS provides a generic watchdog driver that uses > > ACPI WDAT table [1] to abstract actual hardware behind it. > > The same applies to ARM version of Windows. > > > > This series adds > > * WDAT table tailored for TCO watchdog that Q35 already > > has as part of ICH9 chipset and a knob to enable it. > > * SBSA GWDT to arm/vit machine with WDAT table tailored > > for it and necessary tweaks to GWDT to make usable > > with WDAT driver. > > > Also CCing SBSA folks to see if they are interested in adding it to their > > reference machine > > The sbsa-ref machine already implements an sbsa-gwdt watchdog... yep, but not exposed as WDAT one. Hence the question. It also would need clock-frequency tweak if we are expose it via ACPI. PS: I don't even see DT mapping for it, looks like sbsa-gwdt is just wired for the sake of compliance with the spec. Well sbsa-ref specific firmware could just opencode it's mapping instead of getting it from QEMU. > > -- PMM >
