From patchwork Fri Apr 12 10:33:44 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Suzuki K Poulose X-Patchwork-Id: 13627536 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id C61C926AF9 for ; Fri, 12 Apr 2024 10:34:37 +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=1712918079; cv=none; b=gpITWvm5a5HIUSG09AgNKLhVssLQPSW8qx+HofOZteq1m21RlEFffWQGUQ/xHACQmvMOkkw0Y3ZG/j1f7OvGhwy8aOTwYv/OAci+OHQvf72Dqwl8VtTgo46pU/+wkPudn6HSPDy/huOmJF7MVpRPWU22acqYyJgnWiucoqAdvW8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712918079; c=relaxed/simple; bh=EQh050uJpwE670ii9aFFIzRCiywTZNR9LXFPG5YZIks=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=mKDZ18Xd4Zjyq4kjuW4h3LCMr8qE7p3/p/Y1P7tiSmaTAjTTpxVkRoDWFU98Y0GVY1Mvtx34dA1S8pfbs2g9dBvGtRucMiEv4dV9BzLisHk38pMSEkVGmuioDiqTK6EtS67dAZ+AzE0kVNE4GfG14dymeN9/A7SvZEY5WDG2w08= 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; 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 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 9AFB6113E; Fri, 12 Apr 2024 03:35:06 -0700 (PDT) Received: from ewhatever.cambridge.arm.com (ewhatever.cambridge.arm.com [10.1.197.1]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 7CC7E3F64C; Fri, 12 Apr 2024 03:34:35 -0700 (PDT) From: Suzuki K Poulose To: kvmarm@lists.linux.dev Cc: kvm@vger.kernel.org, linux-coco@lists.linux.dev, linux-arm-kernel@lists.infradead.org, maz@kernel.org, alexandru.elisei@arm.com, joey.gouly@arm.com, steven.price@arm.com, james.morse@arm.com, oliver.upton@linux.dev, yuzenghui@huawei.com, andrew.jones@linux.dev, eric.auger@redhat.com, Suzuki K Poulose Subject: [kvm-unit-tests PATCH 09/33] arm: realm: Realm initialisation Date: Fri, 12 Apr 2024 11:33:44 +0100 Message-Id: <20240412103408.2706058-10-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240412103408.2706058-1-suzuki.poulose@arm.com> References: <20240412103408.2706058-1-suzuki.poulose@arm.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 During the boot, run a check for the presence of RMM. If we are Realm, detect the Realm configuration using RSI and initialise the key parameters. Also expose a helper to indicate if this is running inside a Realm Co-developed-by: Joey Gouly Signed-off-by: Joey Gouly Signed-off-by: Suzuki K Poulose --- arm/Makefile.arm64 | 1 + lib/arm/asm/rsi.h | 18 ++++++++++ lib/arm/setup.c | 3 ++ lib/arm64/asm/processor.h | 8 +++++ lib/arm64/asm/rsi.h | 37 ++++++++++++++++++++ lib/arm64/rsi.c | 73 +++++++++++++++++++++++++++++++++++++++ 6 files changed, 140 insertions(+) create mode 100644 lib/arm/asm/rsi.h create mode 100644 lib/arm64/asm/rsi.h create mode 100644 lib/arm64/rsi.c diff --git a/arm/Makefile.arm64 b/arm/Makefile.arm64 index 960880f1..bd167db1 100644 --- a/arm/Makefile.arm64 +++ b/arm/Makefile.arm64 @@ -26,6 +26,7 @@ cflatobjs += lib/arm64/stack.o cflatobjs += lib/arm64/processor.o cflatobjs += lib/arm64/spinlock.o cflatobjs += lib/arm64/gic-v3-its.o lib/arm64/gic-v3-its-cmd.o +cflatobjs += lib/arm64/rsi.o ifeq ($(CONFIG_EFI),y) cflatobjs += lib/acpi.o diff --git a/lib/arm/asm/rsi.h b/lib/arm/asm/rsi.h new file mode 100644 index 00000000..5ff8d011 --- /dev/null +++ b/lib/arm/asm/rsi.h @@ -0,0 +1,18 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2022 Arm Limited. + * All rights reserved. + */ +#ifndef __ASMARM_RSI_H_ +#define __ASMARM_RSI_H_ + +#include + +static inline bool is_realm(void) +{ + return false; +} + +static inline void arm_rsi_init(void) {} + +#endif /* __ASMARM_RSI_H_ */ diff --git a/lib/arm/setup.c b/lib/arm/setup.c index fbb8f523..ebd6d058 100644 --- a/lib/arm/setup.c +++ b/lib/arm/setup.c @@ -25,6 +25,7 @@ #include #include #include +#include #include #include #include @@ -248,6 +249,8 @@ void setup(const void *fdt, phys_addr_t freemem_start) assert(sizeof(long) == 8 || freemem_start < (3ul << 30)); freemem = (void *)(unsigned long)freemem_start; + arm_rsi_init(); + freemem_push_fdt(&freemem, fdt); freemem_push_dt_initrd(&freemem); diff --git a/lib/arm64/asm/processor.h b/lib/arm64/asm/processor.h index 1c73ba32..320ebaef 100644 --- a/lib/arm64/asm/processor.h +++ b/lib/arm64/asm/processor.h @@ -114,6 +114,14 @@ static inline unsigned long get_id_aa64mmfr0_el1(void) #define ID_AA64MMFR0_TGRAN64_SUPPORTED 0x0 #define ID_AA64MMFR0_TGRAN16_SUPPORTED 0x1 +static inline unsigned long get_id_aa64pfr0_el1(void) +{ + return read_sysreg(id_aa64pfr0_el1); +} + +#define ID_AA64PFR0_EL1_EL3 (0xf << 12) +#define ID_AA64PFR0_EL1_EL3_NI (0x0 << 12) + static inline bool system_supports_granule(size_t granule) { u32 shift; diff --git a/lib/arm64/asm/rsi.h b/lib/arm64/asm/rsi.h new file mode 100644 index 00000000..37103210 --- /dev/null +++ b/lib/arm64/asm/rsi.h @@ -0,0 +1,37 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2022 Arm Limited. + * All rights reserved. + */ +#ifndef __ASMARM64_RSI_H_ +#define __ASMARM64_RSI_H_ + +#include + +#include +#include +#include + +#define RSI_GRANULE_SIZE SZ_4K + +extern bool rsi_present; + +void arm_rsi_init(void); + +int rsi_invoke(unsigned int function_id, unsigned long arg0, + unsigned long arg1, unsigned long arg2, + unsigned long arg3, unsigned long arg4, + unsigned long arg5, unsigned long arg6, + unsigned long arg7, unsigned long arg8, + unsigned long arg9, unsigned long arg10, + struct smccc_result *result); + +int __rsi_get_version(unsigned long ver, struct smccc_result *res); +int rsi_get_version(unsigned long ver); + +static inline bool is_realm(void) +{ + return rsi_present; +} + +#endif /* __ASMARM64_RSI_H_ */ diff --git a/lib/arm64/rsi.c b/lib/arm64/rsi.c new file mode 100644 index 00000000..c4560866 --- /dev/null +++ b/lib/arm64/rsi.c @@ -0,0 +1,73 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2022 Arm Limited. + * All rights reserved. + */ +#include + +#include +#include +#include + +bool rsi_present; + +int rsi_invoke(unsigned int function_id, unsigned long arg0, + unsigned long arg1, unsigned long arg2, + unsigned long arg3, unsigned long arg4, + unsigned long arg5, unsigned long arg6, + unsigned long arg7, unsigned long arg8, + unsigned long arg9, unsigned long arg10, + struct smccc_result *result) +{ + return arm_smccc_smc(function_id, arg0, arg1, arg2, arg3, arg4, arg5, + arg6, arg7, arg8, arg9, arg10, result); +} + +struct rsi_realm_config __attribute__((aligned(RSI_GRANULE_SIZE))) config; + +static unsigned long rsi_get_realm_config(struct rsi_realm_config *cfg) +{ + struct smccc_result res; + + rsi_invoke(SMC_RSI_REALM_CONFIG, __virt_to_phys((unsigned long)cfg), + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, &res); + + return res.r0; +} + +int __rsi_get_version(unsigned long ver, struct smccc_result *res) +{ + if ((get_id_aa64pfr0_el1() & ID_AA64PFR0_EL1_EL3) == ID_AA64PFR0_EL1_EL3_NI) + return -1; + + return rsi_invoke(SMC_RSI_ABI_VERSION, ver, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, res); +} + +int rsi_get_version(unsigned long ver) +{ + struct smccc_result res = {}; + int ret; + + + ret = __rsi_get_version(ver, &res); + if (ret == -1) + return ret; + + return res.r0; +} + +void arm_rsi_init(void) +{ + if (rsi_get_version(RSI_ABI_VERSION) != RSI_SUCCESS) + return; + + if (rsi_get_realm_config(&config)) + return; + + rsi_present = true; + + phys_mask_shift = (config.ipa_width - 1); + /* Set the upper bit of the IPA as the NS_SHARED pte attribute */ + prot_ns_shared = (1UL << phys_mask_shift); +}