From nobody Sun Sep 14 03:51:54 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AF7D6C54EAA for ; Fri, 27 Jan 2023 11:29:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233398AbjA0L3p (ORCPT ); Fri, 27 Jan 2023 06:29:45 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41948 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233169AbjA0L3X (ORCPT ); Fri, 27 Jan 2023 06:29:23 -0500 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 84D4772640 for ; Fri, 27 Jan 2023 03:28:31 -0800 (PST) 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 DF7481595; Fri, 27 Jan 2023 03:28:58 -0800 (PST) Received: from e122027.cambridge.arm.com (e122027.cambridge.arm.com [10.1.35.16]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4DEBC3F64C; Fri, 27 Jan 2023 03:28:14 -0800 (PST) From: Steven Price To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: Steven Price , Catalin Marinas , Ard Biesheuvel , Marc Zyngier , Will Deacon , Suzuki K Poulose , James Morse , Oliver Upton , Zenghui Yu , linux-kernel@vger.kernel.org, Joey Gouly , Alexandru Elisei , Christoffer Dall , Fuad Tabba , linux-coco@lists.linux.dev Subject: [RFC PATCH 02/14] arm64: rsi: Add RSI definitions Date: Fri, 27 Jan 2023 11:27:46 +0000 Message-Id: <20230127112758.37891-3-steven.price@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230127112758.37891-1-steven.price@arm.com> References: <20230127112248.136810-1-suzuki.poulose@arm.com> <20230127112758.37891-1-steven.price@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Suzuki K Poulose The RMM (Realm Management Monitor) provides functionality that can be accessed by a realm guest through SMC (Realm Services Interface) calls. The SMC definitions are based on DEN0137[1] version A-bet0. [1] https://developer.arm.com/documentation/den0137/latest Signed-off-by: Suzuki K Poulose Signed-off-by: Steven Price --- arch/arm64/include/asm/rsi_cmds.h | 57 +++++++++++++ arch/arm64/include/asm/rsi_smc.h | 130 ++++++++++++++++++++++++++++++ 2 files changed, 187 insertions(+) create mode 100644 arch/arm64/include/asm/rsi_cmds.h create mode 100644 arch/arm64/include/asm/rsi_smc.h diff --git a/arch/arm64/include/asm/rsi_cmds.h b/arch/arm64/include/asm/rsi= _cmds.h new file mode 100644 index 000000000000..a0b3c1bd786a --- /dev/null +++ b/arch/arm64/include/asm/rsi_cmds.h @@ -0,0 +1,57 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2023 ARM Ltd. + */ + +#ifndef __ASM_RSI_CMDS_H +#define __ASM_RSI_CMDS_H + +#include + +#include + +enum ripas { + RSI_RIPAS_EMPTY, + RSI_RIPAS_RAM, +}; + +static inline unsigned long rsi_get_version(void) +{ + struct arm_smccc_res res; + + arm_smccc_smc(SMC_RSI_ABI_VERSION, 0, 0, 0, 0, 0, 0, 0, &res); + + return res.a0; +} + +static inline unsigned long invoke_rsi_fn_smc(unsigned long function_id, + unsigned long arg0, + unsigned long arg1, + unsigned long arg2, + unsigned long arg3) +{ + struct arm_smccc_res res; + + arm_smccc_smc(function_id, arg0, arg1, arg2, arg3, 0, 0, 0, &res); + return res.a0; +} + +static inline void invoke_rsi_fn_smc_with_res(unsigned long function_id, + unsigned long arg0, + unsigned long arg1, + unsigned long arg2, + unsigned long arg3, + struct arm_smccc_res *res) +{ + arm_smccc_smc(function_id, arg0, arg1, arg2, arg3, 0, 0, 0, res); +} + +static inline unsigned long rsi_set_addr_range_state(phys_addr_t start, + phys_addr_t end, + enum ripas state) +{ + return invoke_rsi_fn_smc(SMC_RSI_IPA_STATE_SET, + start, (end - start), state, 0); +} + +#endif diff --git a/arch/arm64/include/asm/rsi_smc.h b/arch/arm64/include/asm/rsi_= smc.h new file mode 100644 index 000000000000..bc0cdd83f164 --- /dev/null +++ b/arch/arm64/include/asm/rsi_smc.h @@ -0,0 +1,130 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2023 ARM Ltd. + */ + +#ifndef __SMC_RSI_H_ +#define __SMC_RSI_H_ + +/* + * This file describes the Realm Services Interface (RSI) Application Bina= ry + * Interface (ABI) for SMC calls made from within the Realm to the RMM and + * serviced by the RMM. + */ + +#define SMC_RSI_CALL_BASE 0xC4000000 + +/* + * The major version number of the RSI implementation. Increase this when= ever + * the binary format or semantics of the SMC calls change. + */ +#define RSI_ABI_VERSION_MAJOR 1 + +/* + * The minor version number of the RSI implementation. Increase this when + * a bug is fixed, or a feature is added without breaking binary compatibi= lity. + */ +#define RSI_ABI_VERSION_MINOR 0 + +#define RSI_ABI_VERSION ((RSI_ABI_VERSION_MAJOR << 16) | \ + RSI_ABI_VERSION_MINOR) + +#define RSI_ABI_VERSION_GET_MAJOR(_version) ((_version) >> 16) +#define RSI_ABI_VERSION_GET_MINOR(_version) ((_version) & 0xFFFF) + +#define RSI_SUCCESS 0 +#define RSI_ERROR_INPUT 1 +#define RSI_ERROR_STATE 2 +#define RSI_INCOMPLETE 3 + +#define SMC_RSI_FID(_x) (SMC_RSI_CALL_BASE + (_x)) + +#define SMC_RSI_ABI_VERSION SMC_RSI_FID(0x190) + +/* + * arg1 =3D=3D The IPA of token buffer + * arg2 =3D=3D Challenge value, bytes: 0 - 7 + * arg3 =3D=3D Challenge value, bytes: 7 - 15 + * arg4 =3D=3D Challenge value, bytes: 16 - 23 + * arg5 =3D=3D Challenge value, bytes: 24 - 31 + * arg6 =3D=3D Challenge value, bytes: 32 - 39 + * arg7 =3D=3D Challenge value, bytes: 40 - 47 + * arg8 =3D=3D Challenge value, bytes: 48 - 55 + * arg9 =3D=3D Challenge value, bytes: 56 - 63 + * ret0 =3D=3D Status / error + */ +#define SMC_RSI_ATTESTATION_TOKEN_INIT SMC_RSI_FID(0x194) + +/* + * arg1 =3D=3D The IPA of token buffer + * ret0 =3D=3D Status / error + * ret1 =3D=3D Size of completed token in bytes + */ +#define SMC_RSI_ATTESTATION_TOKEN_CONTINUE SMC_RSI_FID(0x195) + +/* + * arg1 =3D=3D Index, which measurements slot to extend + * arg2 =3D=3D Size of realm measurement in bytes, max 64 bytes + * arg3 =3D=3D Measurement value, bytes: 0 - 7 + * arg4 =3D=3D Measurement value, bytes: 7 - 15 + * arg5 =3D=3D Measurement value, bytes: 16 - 23 + * arg6 =3D=3D Measurement value, bytes: 24 - 31 + * arg7 =3D=3D Measurement value, bytes: 32 - 39 + * arg8 =3D=3D Measurement value, bytes: 40 - 47 + * arg9 =3D=3D Measurement value, bytes: 48 - 55 + * arg10 =3D=3D Measurement value, bytes: 56 - 63 + * ret0 =3D=3D Status / error + */ +#define SMC_RSI_MEASUREMENT_EXTEND SMC_RSI_FID(0x193) + +/* + * arg1 =3D=3D Index, which measurements slot to read + * ret0 =3D=3D Status / error + * ret1 =3D=3D Measurement value, bytes: 0 - 7 + * ret2 =3D=3D Measurement value, bytes: 7 - 15 + * ret3 =3D=3D Measurement value, bytes: 16 - 23 + * ret4 =3D=3D Measurement value, bytes: 24 - 31 + * ret5 =3D=3D Measurement value, bytes: 32 - 39 + * ret6 =3D=3D Measurement value, bytes: 40 - 47 + * ret7 =3D=3D Measurement value, bytes: 48 - 55 + * ret8 =3D=3D Measurement value, bytes: 56 - 63 + */ +#define SMC_RSI_MEASUREMENT_READ SMC_RSI_FID(0x192) + +#ifndef __ASSEMBLY__ + +struct realm_config { + unsigned long ipa_bits; /* Width of IPA in bits */ +}; + +#endif /* __ASSEMBLY__ */ + +/* + * arg1 =3D=3D struct realm_config addr + * ret0 =3D=3D Status / error + */ +#define SMC_RSI_REALM_CONFIG SMC_RSI_FID(0x196) + +/* + * arg1 =3D=3D IPA address of target region + * arg2 =3D=3D size of target region in bytes + * arg3 =3D=3D RIPAS value + * ret0 =3D=3D Status / error + * ret1 =3D=3D Top of modified IPA range + */ +#define SMC_RSI_IPA_STATE_SET SMC_RSI_FID(0x197) + +/* + * arg1 =3D=3D IPA of target page + * ret0 =3D=3D Status / error + * ret1 =3D=3D RIPAS value + */ +#define SMC_RSI_IPA_STATE_GET SMC_RSI_FID(0x198) + +/* + * arg1 =3D=3D IPA of host call structure + * ret0 =3D=3D Status / error + */ +#define SMC_RSI_HOST_CALL SMC_RSI_FID(0x199) + +#endif /* __SMC_RSI_H_ */ --=20 2.34.1