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Mon, 17 Nov 2025 21:11:12 -0800 (PST) X-Google-Smtp-Source: AGHT+IGeGaIgIJ+eHw7T5M4BNa235/PtBEceB/aKYl4gUPq87dOaaJOulivh2MenzAAvJySYtSZDbQ== X-Received: by 2002:a17:903:1b10:b0:296:3f23:b93b with SMTP id d9443c01a7336-2986a6b7b8emr169834145ad.2.1763442671676; Mon, 17 Nov 2025 21:11:11 -0800 (PST) Received: from [10.219.57.23] ([202.46.23.19]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2985c249806sm157642235ad.44.2025.11.17.21.11.07 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 17 Nov 2025 21:11:11 -0800 (PST) Message-ID: <8f806e27-6a4e-40f3-ef4e-caec3eac4165@oss.qualcomm.com> Date: Tue, 18 Nov 2025 10:41:06 +0530 Precedence: bulk X-Mailing-List: linux-watchdog@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.5.1 Subject: Re: [PATCH v7 0/2] Add support for Gunyah Watchdog Content-Language: en-US To: hrishabh.rajput@oss.qualcomm.com, Bjorn Andersson , Konrad Dybcio , Wim Van Sebroeck , Guenter Roeck , Rob Herring , Krzysztof Kozlowski , Conor Dooley Cc: linux-arm-msm@vger.kernel.org, linux-watchdog@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Pavan Kondeti , Neil Armstrong , Dmitry Baryshkov References: <20251114-gunyah_watchdog-v7-0-f5c155b941d5@oss.qualcomm.com> From: Shivendra Pratap In-Reply-To: <20251114-gunyah_watchdog-v7-0-f5c155b941d5@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-ORIG-GUID: ButYc7oanNGqo4k-YJ0kN5oFlUtJM9WQ X-Proofpoint-GUID: ButYc7oanNGqo4k-YJ0kN5oFlUtJM9WQ X-Authority-Analysis: v=2.4 cv=acVsXBot c=1 sm=1 tr=0 ts=691bfff1 cx=c_pps a=JL+w9abYAAE89/QcEU+0QA==:117 a=j4ogTh8yFefVWWEFDRgCtg==:17 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=EUspDBNiAAAA:8 a=Jcbj2T6pCAO5tNNiLYMA:9 a=QEXdDO2ut3YA:10 a=zZCYzV9kfG8A:10 a=324X-CrmTo6CU4MGRt3R:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTE4MDAzOCBTYWx0ZWRfX5BvUsiZ/KyJ1 RSdoGYgRWqB8gT6gftyNOckVjZZyoXFZ6rVyzyoSKXaVUt+aJYIEXvQlVVoQd7dqoXnZl/RRC/z 41kYI0FvYHOKsYrUqbTtx0n3m4pWUeEbORc3Iz/wUaba5Fp11DOQTlBjpP6Z0LAx1/lQiGim6Mf 6gI0BF4eDAfAf7xHZrZzqdZ1WMPz6YCvt8jP5qAIuJMJgmUG9d71eXfiujXPpebnul9jCiCTHpW Af12rxe4GZIUVJ+Els2j7FSfy+hNUVAxJHiOAFNV91ke1uT1pZkFPjfNO+sF1EEohGLBsA2hIfK iUUu8LdRFh0MgGMHcZQviFecg4yiHJxtHr3adnZkPo1TmyS9OqxEjXavFeM2NgJ8FlU6Hd45mQI iXmNOTL8iw6RTMuiY4eX2e+FbYst9Q== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-17_04,2025-11-13_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 suspectscore=0 clxscore=1011 priorityscore=1501 malwarescore=0 spamscore=0 bulkscore=0 impostorscore=0 phishscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2511180038 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 # on qcs6490-rb3gen2 thanks, Shivendra