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Mon, 02 Mar 2026 21:23:43 -0800 (PST) Received: from hu-pkondeti-hyd.qualcomm.com ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c70fa8302absm14767994a12.29.2026.03.02.21.23.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 02 Mar 2026 21:23:43 -0800 (PST) Date: Tue, 3 Mar 2026 10:53:36 +0530 From: Pavan Kondeti To: Pavan Kondeti , Bjorn Andersson , Wim Van Sebroeck Cc: Bjorn Andersson , Wim Van Sebroeck , Konrad Dybcio , Guenter Roeck , Rob Herring , Krzysztof Kozlowski , Conor Dooley , linux-arm-msm@vger.kernel.org, linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Neil Armstrong , Dmitry Baryshkov , Shivendra Pratap Subject: Re: [PATCH v8 0/2] Add support for Gunyah Watchdog Message-ID: <4427f335-bb50-44af-94a5-142d8355a705@quicinc.com> References: <20251118-gunyah_watchdog-v8-0-e5de12e2eef5@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Authority-Analysis: v=2.4 cv=GMMF0+NK c=1 sm=1 tr=0 ts=69a67061 cx=c_pps a=MTSHoo12Qbhz2p7MsH1ifg==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=kj9zAlcOel0A:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=VwQbUJbxAAAA:8 a=COk6AnOGAAAA:8 a=NEAV23lmAAAA:8 a=EUspDBNiAAAA:8 a=spW7CxkbatQ-H6tlaUEA:9 a=CjuIK1q_8ugA:10 a=GvdueXVYPmCkWapjIL-Q:22 a=TjNXssC_j7lpFel5tvFf:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzAzMDAzMyBTYWx0ZWRfX4XMdVif38yy7 wvodTPvz1p2gRZ3lIXiEaPMKldYumAwOxfDinarIfG2B6LHPt56NEb2kllDjO4KiCL74Y0iO6vp 9VbBAKy0VPh6Hn6r9dUCtpRf7iluiAzra4GCj2kiiwMKbRPSEfVKdTVjzxbTI7X5THahjwyYx2n qHeJr5UK0Dem2dDZgEa4eIJKIA/oDQSEgf4S/ZtYTxSY8D3uEFh5URR3hy1xQt1IqHrCPwpq7Dy DZSwSu4VyB+2KOB2GN3C/Y7mdautCFJQ2ha8QXn/DIlWkBOPrq0h1KG8/Oe4i/P4IxlPqVfR/Y1 dfDWeMRSu6cprKOoKOEpceaHaKhfAtCbQYUMqpSOZNKhdmNlgg0LWMPTO1zM/8E27dwwaqn7eCB 8odjm0bcH1dagu+pNw3WvzwvCC6LxLHkfm9txM8bPalVTlfRdFwMgnRgiqfB9j6TVZD+uXnMJwC bhCublIFJWc/oyE0LjQ== X-Proofpoint-GUID: iN4IjHOHQ4xN8QpOwN74DaYL6PCd1KkB X-Proofpoint-ORIG-GUID: iN4IjHOHQ4xN8QpOwN74DaYL6PCd1KkB X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-02_05,2026-03-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 clxscore=1015 lowpriorityscore=0 spamscore=0 adultscore=0 priorityscore=1501 impostorscore=0 phishscore=0 malwarescore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603030033 Hi Bjorn / Wim, On Tue, Feb 24, 2026 at 02:58:05PM +0530, Pavan Kondeti wrote: > Hi Bjorn / Wim, > > On Tue, Nov 18, 2025 at 10:40:55AM +0000, 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. > > > > [1] > > https://lore.kernel.org/all/20240222-gunyah-v17-0-1e9da6763d38@quicinc.com/ > > > > [2] > > https://github.com/quic/gunyah-hypervisor > > > > Signed-off-by: Hrishabh Rajput > > --- > > Changes in v8: > > - Fix error handling in gunyah_wdt_probe() to fail silently with -ENODEV > > if WDT_STATUS call returns -EOPNOTSUPP, indicating support for Gunyah > > watchdog is not present. Fail with logs for other errors. > > - Link to v7: https://lore.kernel.org/r/20251114-gunyah_watchdog-v7-0-f5c155b941d5@oss.qualcomm.com > > > > The series applies cleanly on v7.0-rc1. I have tested the watchdog > driver functionality and ramdumps collection on Kodiak RB3 Gen2 > platform. Can you please pick this series for v7.1? > > As Hrishabh mentioned earlier, both patches don't have any compile time > dependencies. > Since Hrishabh has left Qualcomm, I am taking over the series. Hence sending request emails to include this series for v7.0 . I did verify this on v7.0-rc1 as mentioned above. Since the series applies cleanly, I have not re-sent the series. However, if you prefer to resend it since a new person taking over, I can re-send the series with my Signed-off-by. Please let me know your preference. Thanks, Pavan