From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 336954E3788; Thu, 9 Jul 2026 18:40:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783622412; cv=none; b=XHUZswwtG3qGExM9Dx+YwK9VFrhmiQSS3uHet+flUFOVTW/tuFyQpBUES0e42sg7jtqCcuLDvStLRL7swoLeTv81DAdEgSGYsG3rkgrDjOx9kFsyIpPOwOE8lD6cFTDA91JWyYlYaqM7n29SomeCmvlpF53bEI3KOMaZslDQAQU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1783622412; c=relaxed/simple; bh=gzzsP4OMBAKH5syutaWFaVFk6QC8CDQSj953+mInO7w=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=OaBAR5XCP8cEa8Xh605RdW2y6PLNWM1ROK3RVPxOV6WOM8Bb3TCWuYbG/5Wc6Bk3wtrJoYs5S9Zv9DIsNekmoCRp57rbUWNEJQfKRVKHeFreCQlCWozK2bB1FhC9FfGO57u0G6Fk5oVL1LDlYOmc3zZayTP8uEM1BbtmdTLaZj8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZbchbECU; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ZbchbECU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9B45A1F00A3A; Thu, 9 Jul 2026 18:40:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1783622410; bh=/QjA1AblP9L+Kt9SpYOOkyJVVOOzYmepn7GTlwZFelA=; h=From:Date:Subject:References:In-Reply-To:To:Cc; b=ZbchbECU3TgvDU9TfKk07SWKmdAeq0RpQ4u52YETSBtL4NVKmeqgzzVYiwlmp3gkR w7CWPmLyF1YuVVzrKg94orJD1cwQGwg0KaICevffgR2WZL8oCDUrE4zOLwq5hJKZfQ I3Swon6TGYL9TZVro/L/hbj5iDh/Mg/FFczzqtcg2c2EGYNe56HAPd1nedf8lEZX5g d9aNNf4mPQY5NSin65kAMqPBBY4cZER/WqgoCb2Jr7be67l1XjkMzZQ/ssZDMq4Rd+ CBZ0PbHkI2yy5xbaAIpJ39qc1MwO/TdWLMm+xsvjVlRc+q/uQNwV8xNT/YlNbZo2yv ruT96phC1mcvA== From: Mark Brown Date: Thu, 09 Jul 2026 19:27:22 +0100 Subject: [PATCH v12 01/29] arm64/sysreg: Define full value read/modify/write helpers Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260709-kvm-arm64-sme-v12-1-d0301d79ef58@kernel.org> References: <20260709-kvm-arm64-sme-v12-0-d0301d79ef58@kernel.org> In-Reply-To: <20260709-kvm-arm64-sme-v12-0-d0301d79ef58@kernel.org> To: Marc Zyngier , Joey Gouly , Catalin Marinas , Suzuki K Poulose , Will Deacon , Paolo Bonzini , Jonathan Corbet , Shuah Khan , Oliver Upton Cc: Dave Martin , Fuad Tabba , Mark Rutland , Ben Horgan , Jean-Philippe Brucker , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, Peter Maydell , Eric Auger , Mark Brown X-Mailer: b4 0.16-dev X-Developer-Signature: v=1; a=openpgp-sha256; l=951; i=broonie@kernel.org; h=from:subject:message-id; bh=gzzsP4OMBAKH5syutaWFaVFk6QC8CDQSj953+mInO7w=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBqT+rq2VgOet80BJWD6Xh/o3WcW28LRlhze8qrE b4cZrVNCe6JATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCak/q6gAKCRAk1otyXVSH 0F+yB/4mbTCi3gD2Q4fl6xZyQFLCtztRwO4QXcc69jR3p5oUmCZtxnfmfIMo48auy7toplQM1C2 nrebDOyEN4RGz+nbVuXPUjCTH7uPFygS7UJg8sEYC8+X/UtmvrwIrrMQE+8NUkrxSWXY+4qEeqo qDobBHmgPLc0AAz97bCvy5oDrv3tvHiJCRbFHShnb37WwZT5azCcL9hJFFWf/JYzQ13EW2OnWT0 kHqh2ke8cZvmG/BTRgwa//QcL508JNaftLrCNfhaTRCLQUdOGkZYfSRiYjj27SnR0Frh5VJeNAF 32iiyGcb6r+YYrtS2qrEKLEscDXE7FlEPTJNTWZJVGXgs7Dp X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB We have read/modify write helpers for updating bitfields in sysregs if they have changed but we do not have them for updating the whole register. Define sysreg_cond_update() for that. Signed-off-by: Mark Brown --- arch/arm64/include/asm/sysreg.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h index 7aa08d59d494..4b96449e0ffa 100644 --- a/arch/arm64/include/asm/sysreg.h +++ b/arch/arm64/include/asm/sysreg.h @@ -1235,6 +1235,12 @@ write_sysreg_s(__scs_new, sysreg); \ } while (0) +#define sysreg_cond_update(sysreg, val) \ + sysreg_clear_set(sysreg, ~0UL, val) + +#define sysreg_cond_update_s(sysreg, val) \ + sysreg_clear_set_s(sysreg, ~0UL, val) + #define write_sysreg_hcr(__val) do { \ if (IS_ENABLED(CONFIG_AMPERE_ERRATUM_AC04_CPU_23) && \ (!system_capabilities_finalized() || \ -- 2.47.3