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[86.49.245.11]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4a1f99ffbabsm4757595e9.1.2026.10.20.03.00.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Oct 2026 03:00:20 -0700 (PDT) X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Tue, 20 Oct 2026 12:00:18 +0200 Message-Id: From: =?utf-8?q?Radim_Kr=C4=8Dm=C3=A1=C5=99?= Subject: Re: riscv: hwprobe: Report Supm only when available Cc: , , "Paul Walmsley" , "Palmer Dabbelt" , "Alexandre Ghiti" , "Samuel Holland" , "Andy Chiu" , "Guodong Xu" , "Zong Li" , "Charlie Jenkins" To: "Andy Chiu" References: <20261006075303.205216-1-radim.krcmar@oss.qualcomm.com> <20261006075303.205216-5-radim.krcmar@oss.qualcomm.com> In-Reply-To: X-Proofpoint-ORIG-GUID: jh1Aux1YV3_0A9QoJY2ZdxijVBHP0x3i X-Proofpoint-Spam-Info: AW1haW4tMjYxMDIwMDA0MCBTYWx0ZWRfX6re+h+DKfKug 6PlQBGVMC7cMrgO6xYv+23QgCHljX25JmYG8lsiUkVkcD5EqjcdpX029GnTgOYxekEOzk5cBFV2 qEkmAwGxwp7mMRROQRJnJBSjhzpAsLU= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDIwMDA0MCBTYWx0ZWRfX50mLe0SPRmb2 JuW5/7+uGxKYkUX0iAhEY4evxQFrT01IXk0a+8zebPStWiC4juMnV2v3Cv+7AyhYHQdfzF0Vu+n rRqJ52LbpU8niniG+ZbILpMk/AfT8W8fWJ83aCBTOfz21vpjZkOE6uqg+v7nV7LKyLR2e8uHYAR NXSoRHX/hYb1TRLltHZ0Y7D94wcbSnALZW2MHyrw/wSfmYliP4/esM1GUw2PgMr36bWELZMxBF9 rhjrAFikzHhXv4pd2XzdfOLyEK8tScKrer15qijwMqI2CacDLJToHThEU/MXvUFlc7Fwsds8RUo kbphVwgOdXZ42dsybGtNlCLzw1h0v4akTNMCim5HAriwrGxJoW451T0togFtanu8J+m7S8df1/V 2KHJ/dVG1EjNIapf0SlLLd7KdgE7+PwJmWSha+0KAc9ZhxDt+hNzJnMrF/yfo5eAfKw0ktx6Obg hsFN9res5UG/mTSwf5w== X-Proofpoint-GUID: jh1Aux1YV3_0A9QoJY2ZdxijVBHP0x3i X-Authority-Analysis: v=2.4 cv=crUOAF4i c=1 sm=1 tr=0 ts=6ad73d9c cx=c_pps a=mPf7EqFMSY9/WdsSgAYMbA==:117 a=4CXLxsOAgPM/krjtHEZQyA==:17 a=IkcTkHD0fZMA:10 a=660iZSQnnn4A:10 a=M51BFTxLslgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=t9496tuAAAAA:8 a=1rQCNxc8bWSMfTx6MfgA:9 a=QEXdDO2ut3YA:10 a=dawVfQjAaf238kedN5IG:22 a=4wQ91nGE5lQcD7eh5OX0:22 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=2026-10-20_01,2026-10-19_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 suspectscore=0 malwarescore=0 bulkscore=0 adultscore=0 impostorscore=0 priorityscore=1501 phishscore=0 spamscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610190000 definitions=main-2610200040 2026-10-16T16:45:00-05:00, Andy Chiu : > On Tue, Oct 06, 2026 at 09:53:01AM +0200, Radim Krcm=C3=A1r wrote: > > --- > > The compat hiding and global sysctl toggle better fit in Andy's series= . > > That series was dropped because the > mechanism was not in flavor of reviewers and we are going to deprecate > the prctl[1]. But I can see there is still a need for understanding if an > extension exists at runtime. We will take time to revisit that Thanks for the review and clarification. We could make the design cleaner without losing practical flexibility by abandoning the sysctl knobs in favor of kernel command line parameters. Boot time configuration would stabilize user-mode execution environment and we wouldn't need to expand hwprobe now. It's still breaking UABI, through... I'll send a proposal for discussion after the merge window.