linux-kernel - Re: [PATCH v7 0/2] Add support for Gunyah Watchdog

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Message-ID: <8f806e27-6a4e-40f3-ef4e-caec3eac4165@oss.qualcomm.com>
Date: Tue, 18 Nov 2025 10:41:06 +0530
From: Shivendra Pratap <shivendra.pratap@....qualcomm.com>
To: hrishabh.rajput@....qualcomm.com, Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck
 <linux@...ck-us.net>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-watchdog@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Pavan Kondeti <pavan.kondeti@....qualcomm.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Subject: Re: [PATCH v7 0/2] Add support for Gunyah Watchdog



On 11/14/2025 1:27 PM, Hrishabh Rajput via B4 Relay wrote:
> Gunyah is a Type-I hypervisor which was introduced in the patch series
> [1]. It is an open source hypervisor. The source repo is available at
> [2].
> 
> The Gunyah Hypervisor doesn't allow its Virtual Machines to directly
> access the MMIO watchdog. It either provides the fully emulated MMIO
> based watchdog interface or the SMC-based watchdog interface depending
> on the hypervisor configuration.
> The SMC-based watchdog follows ARM's SMC Calling Convention (SMCCC)
> version 1.1 and uses Vendor Specific Hypervisor Service Calls space.
> 
> This patch series adds support for the SMC-based watchdog interface
> provided by the Gunyah Hypervisor.
> 
> This series is tested on SM8750 platform.

Tested-by: Shivendra Pratap <shivendra.pratap@....qualcomm.com> # on qcs6490-rb3gen2

thanks,
Shivendra