From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 134D8E9B36E for ; Mon, 2 Mar 2026 11:57:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=/QhwCTwy4AMVoDMPIZfUoIHetvpm2/Ja5aNkOS8lcHc=; b=H6aB5do9pwyRldF4xMugd84k2y SYYgxOTfO/h0fAdhMeVG5ELAeiH5BedGXaouxva4ua69OyQSUOpQrm1m4Xdd0zk9kO3JENzG/Ot0f J1cb/Rqk4NTPJIRuiY4f6nIVRdjTXcaa0YwpIv0BdqYXSD/Z50P33uypj/VbkqZzc5/fKMBad89YR 3fP5n3i0jV7HZ+HdM7eNQk0nO4TRCDyyUh9jsdgo+y3r5DNRgWYmsF3PRMHVV+O8w1bjMuM57i9kg vYvuiJ2PoPdEPWWcNspRwf2rKDQNh1sIrI1nkdevpZmBNDjARiB5mZL7fqlvf0UYGHoKPXGZgJEZn n90tebVQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vx1tm-0000000CsLH-0Win; Mon, 02 Mar 2026 11:57:18 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vx1tj-0000000CsIC-3LlH for linux-arm-kernel@lists.infradead.org; Mon, 02 Mar 2026 11:57:17 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 16EC74180E; Mon, 2 Mar 2026 11:57:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E7764C19423; Mon, 2 Mar 2026 11:57:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772452634; bh=c49Vj6dYxBjCUX5m63Z1mVVfVLMWdQ22PCQzSa8wfQ8=; h=From:To:Cc:Subject:Date:From; b=UVmCX3IoDgCmqpqpmjBui/OrryISQMxnOSAkik4i17ixpSSw2tiNjZ1t/gsIRzcCb 84gB8YdIaCncB9PIEo23HzIKTvZiPKuSqGlZRpjvSmWVrQC6edK6rNp1mUknBpcf2o 8kcovZ+SSoYDGq6EksYR4DOc22uQMWubcoKpFTOAqcHpOkQyDp0hBSGtr8bNbDApKM Aqjn6BtI7I9NFiTAniRhnaaYqBVKYZ0NktGpjF5Oj7sQ+/K+rPauDr9PDFEaR4Nrpu 3URiicXMHyeWxv9rR6XQuq8PFOnsNlvpsms8DOzfNH/MordQ5MxNduJ3qpwfT3bowo Bp6hVzQUfoa1Q== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1vx1tg-0000000FDFJ-3ap5; Mon, 02 Mar 2026 11:57:12 +0000 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev Cc: Fuad Tabba , Will Deacon , Catalin Marinas , Mark Rutland , Joey Gouly , Suzuki K Poulose , Oliver Upton , Zenghui Yu Subject: [PATCH v2 00/11] arm64: Fully disable configured-out features Date: Mon, 2 Mar 2026 11:56:41 +0000 Message-ID: <20260302115653.1517326-1-maz@kernel.org> X-Mailer: git-send-email 2.47.3 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, tabba@google.com, will@kernel.org, catalin.marinas@arm.com, mark.rutland@arm.com, joey.gouly@arm.com, suzuki.poulose@arm.com, oupton@kernel.org, yuzenghui@huawei.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260302_035715_859331_73A41FA9 X-CRM114-Status: GOOD ( 11.42 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This is v2 of this series attempting at making the handling of features that are disabled at compile time a bit less awkward for non-userspace consumers of the sanitised feature bits. A few things have changed, thanks to Fuad and Suzuki spending time on reviewing this, but the overall behaviour is the same. * From v1 [1]: - Mark ALL_HIDDEN and HIGHER_SAFE as incompatible - Don't update a feature that is ALL_HIDDEN (or overridden) on the secondary boot path - Reduce the size of struct arm64_ftr_bits - Add a helper for setting a field to its safe value [1] https://lore.kernel.org/r/20260219195533.2455736-1-maz@kernel.org Marc Zyngier (11): arm64: Skip update of an idreg field affected by an override arm64: Add a helper setting a feature field to its safe value arm64: Add logic to fully remove features from sanitised id registers arm64: Convert CONFIG_ARM64_PTR_AUTH to FTR_CONFIG() arm64: Convert CONFIG_ARM64_SVE to FTR_CONFIG() arm64: Convert CONFIG_ARM64_SME to FTR_CONFIG() arm64: Convert CONFIG_ARM64_GCS to FTR_CONFIG() arm64: Convert CONFIG_ARM64_MTE to FTR_CONFIG() arm64: Convert CONFIG_ARM64_POE to FTR_CONFIG() arm64: Convert CONFIG_ARM64_BTI to FTR_CONFIG() arm64: Remove FTR_VISIBLE_IF_IS_ENABLED() arch/arm64/include/asm/cpufeature.h | 15 +-- arch/arm64/kernel/cpufeature.c | 141 +++++++++++++++++----------- 2 files changed, 94 insertions(+), 62 deletions(-) -- 2.47.3