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[199.106.103.254]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3a0a8d290d0sm2047321a91.13.2026.09.24.09.58.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Sep 2026 09:58:50 -0700 (PDT) Date: Thu, 24 Sep 2026 09:58:46 -0700 From: Jonathan Cameron To: Suzuki K Poulose Cc: kvm@vger.kernel.org, kvmarm@lists.linux.dev, maz@kernel.org, will@kernel.org, catalin.marinas@arm.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, steven.price@arm.com, aneesh.kumar@kernel.org, oupton@kernel.org, gshan@redhat.com, joey.gouly@arm.com, tabba@google.com, yuzenghui@huawei.com, linux-coco@lists.linux.dev, gankulkarni@os.amperecomputing.com, sdonthineni@nvidia.com, alpergun@google.com, fj0570is@fujitsu.com, WeiLin.Chang@arm.com, lpieralisi@kernel.org, enju.kohei@fujitsu.com, sudeep.holla@arm.com Subject: Re: [PATCH v19 2/7] firmware: arm_rmm: Check for RMI support at init Message-ID: <20260924095846.000051f3@oss.qualcomm.com> In-Reply-To: <20260924135201.850038-3-suzuki.poulose@arm.com> References: <20260924135201.850038-1-suzuki.poulose@arm.com> <20260924135201.850038-3-suzuki.poulose@arm.com> Organization: Qualcomm X-Mailer: Claws Mail 4.4.0 (GTK 3.24.51; x86_64-w64-mingw32) Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: ja_h1Xk6hO381IzGcbvakACULByqLGRZ X-Authority-Analysis: v=2.4 cv=U/MHnuru c=1 sm=1 tr=0 ts=6ab556cc cx=c_pps a=vVfyC5vLCtgYJKYeQD43oA==:117 a=JYp8KDb2vCoCEuGobkYCKw==:17 a=kj9zAlcOel0A:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=7CQSdrXTAAAA:8 a=EUspDBNiAAAA:8 a=iEv2s1z673h7nQAfKJgA:9 a=CjuIK1q_8ugA:10 a=rl5im9kqc5Lf4LNbBjHf:22 a=a-qgeE7W1pNrGK8U0ZQC:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTI0MDA2OSBTYWx0ZWRfX/1KTYXd0I+NX Itb6BLzuKcEFaJZaZI77l9KKXheqEKpMMewOWXrhD8o5cVeCJgu0Bvt5LbBIjaUgbuw+4X/NrXt 8SVfP+/WOou+kE1nBYWFYHWRILhcORZekGJJQWqsfl6S9ryQCI4moAnx1WzoJl4L+DnF//k3qYT nEu5h3ipC7lIWGkH/yRHwYDgfLGIAxyE/CIlSnZ6AEnbnTAfmg2kNex2r7OYKIQiTPz4V+PbC4C HAku6IyxVO0evaKnhAIAGgoj7/6zoSUPqOPvSwQea8f+xte2QJei9wjuBZ+slVVEeAPP81Qc0+l uj64nkHU0C4hz6F2EIS+ha3SJ6U0XQpXFEv+iLp+HsX0TDKFbubgg1uBAftc51E2SI6BkwGzrME wtM/HaMEJSiwTh5kHTsodNfgJdrmYuoeKhxEvna2Q/CyEFl6WxPrGfArtVerYMHpz3jLD5ywCD2 I1dLn0UREYRiVj/B1nA== X-Proofpoint-Spam-Info: AW1haW4tMjYwOTI0MDA2OSBTYWx0ZWRfX54M83ARyhNGc CYWitqJPFkxqxB6fm8sSDwrYUkSArQCTOyxM4uh1mtQjDFOiu1PgXeXf9ckimHmwIByZQsTlpgf xsPdFfN0MXTO+qTYZNSqGJAw7zEixuk= X-Proofpoint-ORIG-GUID: ja_h1Xk6hO381IzGcbvakACULByqLGRZ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-24_04,2026-09-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 spamscore=0 lowpriorityscore=0 suspectscore=0 adultscore=0 priorityscore=1501 bulkscore=0 clxscore=1015 impostorscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609240069 On Thu, 24 Sep 2026 14:51:56 +0100 Suzuki K Poulose wrote: > From: Steven Price > > Query the RMI version number and check if it is a compatible version. > The first two feature registers are read and exposed for future code to > use. > > We only support this for Little Endian kernels, the Big Endian kernel > support is anyway marked BROKEN and is being removed. > > Signed-off-by: Steven Price > Co-developed-by: Suzuki K Poulose > Signed-off-by: Suzuki K Poulose Reviewed-by: Jonathan Cameron