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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: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=YfoodARf c=1 sm=1 tr=0 ts=6ab556cc cx=c_pps a=UNFcQwm+pnOIJct1K4W+Mw==:117 a=JYp8KDb2vCoCEuGobkYCKw==:17 a=kj9zAlcOel0A:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=gowsoOTTUOVcmtlkKump:22 a=7CQSdrXTAAAA:8 a=EUspDBNiAAAA:8 a=iEv2s1z673h7nQAfKJgA:9 a=CjuIK1q_8ugA:10 a=uKXjsCUrEbL0IQVhDsJ9:22 a=a-qgeE7W1pNrGK8U0ZQC:22 X-Proofpoint-ORIG-GUID: bVuArRbERuOip6a2v9f9u_1e42BokzpB X-Proofpoint-GUID: bVuArRbERuOip6a2v9f9u_1e42BokzpB X-Proofpoint-Spam-Info: AW1haW4tMjYwOTI0MDA2OSBTYWx0ZWRfXz0sKt/gkSVrv guuIE3GLB81GB+lu3HldB8P2rbosJedtIN8HBb78XcwWvdxd6XpnML8jdCMzwoQCaf+X2v7rSzs TJJ/frN/msPemR5jbbanUpXPpy2nxEs= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTI0MDA2OSBTYWx0ZWRfX7gr44KE2yKCe UUce0M+mJhGaVU4cttvH3uah+uWtgueUCqXtb+MDG+5wFOas6YmlaYRP3LHwCDeUZi3o3oTOG+K bU+xElL5vviyP+eWEi9311NmtAOHa2v0QUNGL1xtav2kISm23L7eEId0gk5RiFyxwasRhINY9ny AAg03SCpwMr+XAW7/qeOzvjGLWnk3tV0HcgtgcT/tgwA7wFUqgCHNT8XMCW/n9BrZ4UZ+/37IMy eJ10qCogLbcZNnYjoNHqvlku1A9HF2n2cLIoxg6Ws7aCQFFZvNwKuK8S2+Aa3JBuIFUWfEgiAa9 pvs5UPqglMXXwuAPuoXPjFzsFYofqPmxiZFlDJRfQPF1jNfX6E4YRGGDgPK+AEgQXExKnjT65Qk Cre6EsJBkbwV/u9t6wuCbCnbM9+I1sr/gDhzu9fDJ1bAcFdx061V2s7PlDO5mea4SLarvfuKpz5 mUCBzWzJ81gfosGQrUg== 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 suspectscore=0 clxscore=1015 lowpriorityscore=0 spamscore=0 priorityscore=1501 phishscore=0 adultscore=0 malwarescore=0 bulkscore=0 impostorscore=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