From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 8E21140F75E; Mon, 3 Aug 2026 13:44:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785764670; cv=none; b=Ss6FC9HH39WBFUyWwTyiCkdNiveT2SiVVOKzHhakoQfypfaFIg3aqq99A2pKTk89BweZ2+yLbfCMG7iMMd4GoGBhv1STQjMj2D6mHD+bPgErx/cgEDQfXSJzUGfusr3kx/PwbRfSpeQ/FBX1/vjjRJBohaCxtA5EbLtaFrGbJAQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785764670; c=relaxed/simple; bh=tlsaj4m26Ey7o2A3mqrYe7pOBLDgXjDPJ5uCPqwZu6o=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=AeIfV8WV+Jr0pN85rGiYUOny2C4w8XEX1sHfAabOFOienUWv7gf6xe5J926xzPmYPrQRuS10tuYFhY/t6ytuIC5r5m9dxS8RwXPM4Spbb0umh61Qb1xIWpIUQeVd/WWnTxuBWjYd1fCJnQmS7DZdp0E7ZDMVnqnP3nf+Tkcy7v4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=bfwe9ljp; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="bfwe9ljp" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id DF7BA1595; Mon, 3 Aug 2026 06:44:23 -0700 (PDT) Received: from e122027.cambridge.arm.com (e122027.cambridge.arm.com [10.1.25.28]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 1D43D3F66F; Mon, 3 Aug 2026 06:44:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1785764667; bh=tlsaj4m26Ey7o2A3mqrYe7pOBLDgXjDPJ5uCPqwZu6o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bfwe9ljphKHnk02i2bUdQNUSpa2cKpcBdHPsSm41T1SgYcGZl5gWJDf56A4T70vTx EjzpIsRCe1Yh4BZ6usPyGGOjKvwuzw4aVTweIk5KwWN4O6U5Fw5PD9h8JCYHvra8Be jy8oHnoSsJ+WNNB9DnDJoo9uZ3Qd1Z9c1vYM5DT4= From: Steven Price To: kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: Steven Price , Catalin Marinas , Marc Zyngier , Will Deacon , James Morse , Oliver Upton , Suzuki K Poulose , Zenghui Yu , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Joey Gouly , Alexandru Elisei , Christoffer Dall , Fuad Tabba , linux-coco@lists.linux.dev, Ganapatrao Kulkarni , Gavin Shan , Shanker Donthineni , Alper Gun , "Aneesh Kumar K . V" , Emi Kisanuki , Vishal Annapurve , WeiLin.Chang@arm.com, Lorenzo Pieralisi Subject: [PATCH v16 02/45] firmware: arm_rmm: Add wrappers for direct RMI calls Date: Mon, 3 Aug 2026 14:43:18 +0100 Message-ID: <20260803134403.80630-3-steven.price@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260803134403.80630-1-steven.price@arm.com> References: <20260803134403.80630-1-steven.price@arm.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The wrappers make the call sites easier to read and deal with the boilerplate of handling the error codes from the RMM. Signed-off-by: Steven Price --- Changes from v15: * Split out wrappers for realms to a separate commit. * Wrappers that have output arguments now only write the output when the command completes successfully. Changes from v14: * Update to RMM v2.0-bet2 spec. * Move SRO related wrappers to a later patch due to dependencies. * Common wrappers are split into include/linux/arm-rmi-cmds.h. Changes from v13: * Update to RMM v2.0-bet1 spec including some SRO support (there still some FIXMEs where SRO support is incomplete). Changes from v12: * Update to RMM v2.0 specification Changes from v8: * Switch from arm_smccc_1_2_smc() to arm_smccc_1_2_invoke() in rmi_rtt_read_entry() for consistency. Changes from v7: * Minor renaming of parameters and updated comments Changes from v5: * Further improve comments Changes from v4: * Improve comments Changes from v2: * Make output arguments optional. * Mask RIPAS value rmi_rtt_read_entry() * Drop unused rmi_rtt_get_phys() --- include/linux/arm-rmi-cmds.h | 83 ++++++++++++++++++++++++++++++++++++ 1 file changed, 83 insertions(+) create mode 100644 include/linux/arm-rmi-cmds.h diff --git a/include/linux/arm-rmi-cmds.h b/include/linux/arm-rmi-cmds.h new file mode 100644 index 000000000000..5ee94da96e4a --- /dev/null +++ b/include/linux/arm-rmi-cmds.h @@ -0,0 +1,83 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2026 ARM Ltd. + */ + +#ifndef __LINUX_ARM_RMI_CMDS_H_ +#define __LINUX_ARM_RMI_CMDS_H_ + +#include +#include +#include + +#include + +/** + * rmi_rmm_config_set() - Configure the RMM + * @cfg_ptr: PA of a struct rmm_config + * + * Sets configuration options on the RMM. + * + * Return: RMI return code + */ +static inline int rmi_rmm_config_set(unsigned long cfg_ptr) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_invoke(SMC_RMI_RMM_CONFIG_SET, cfg_ptr, &res); + + return res.a0; +} + +/** + * rmi_granule_tracking_get() - Get configuration of a Granule tracking region + * @start: Base PA of the tracking region + * @end: End of the PA region + * @out_category: Memory category + * @out_state: Tracking region state + * @out_top: Top of the memory region + * + * Return: RMI return code + */ +static inline int rmi_granule_tracking_get(unsigned long start, + unsigned long end, + unsigned long *out_category, + unsigned long *out_state, + unsigned long *out_top) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_invoke(SMC_RMI_GRANULE_TRACKING_GET, start, end, &res); + + if (res.a0 == RMI_SUCCESS) { + if (out_category) + *out_category = res.a1; + if (out_state) + *out_state = res.a2; + if (out_top) + *out_top = res.a3; + } + + return res.a0; +} + +/** + * rmi_features() - Read feature register + * @index: Feature register index + * @out: Feature register value is written to this pointer + * + * Return: RMI return code + */ +static inline int rmi_features(unsigned long index, unsigned long *out) +{ + struct arm_smccc_res res; + + arm_smccc_1_1_invoke(SMC_RMI_FEATURES, index, &res); + + if (res.a0 == RMI_SUCCESS && out) + *out = res.a1; + + return res.a0; +} + +#endif -- 2.43.0