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 5541E28F2; Fri, 27 Jan 2023 11:29:56 +0000 (UTC) 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 DDEF815BF; Fri, 27 Jan 2023 03:30:37 -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 D62683F64C; Fri, 27 Jan 2023 03:29:53 -0800 (PST) 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 Subject: [RFC PATCH 05/28] arm64: RME: Define the user ABI Date: Fri, 27 Jan 2023 11:29:09 +0000 Message-Id: <20230127112932.38045-6-steven.price@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230127112932.38045-1-steven.price@arm.com> References: <20230127112248.136810-1-suzuki.poulose@arm.com> <20230127112932.38045-1-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 There is one (multiplexed) CAP which can be used to create, populate and then activate the realm. Signed-off-by: Steven Price --- Documentation/virt/kvm/api.rst | 1 + arch/arm64/include/uapi/asm/kvm.h | 63 +++++++++++++++++++++++++++++++ include/uapi/linux/kvm.h | 2 + 3 files changed, 66 insertions(+) diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst index 0dd5d8733dd5..f1a59d6fb7fc 100644 --- a/Documentation/virt/kvm/api.rst +++ b/Documentation/virt/kvm/api.rst @@ -4965,6 +4965,7 @@ Recognised values for feature: ===== =========================================== arm64 KVM_ARM_VCPU_SVE (requires KVM_CAP_ARM_SVE) + arm64 KVM_ARM_VCPU_REC (requires KVM_CAP_ARM_RME) ===== =========================================== Finalizes the configuration of the specified vcpu feature. diff --git a/arch/arm64/include/uapi/asm/kvm.h b/arch/arm64/include/uapi/asm/kvm.h index a7a857f1784d..fcc0b8dce29b 100644 --- a/arch/arm64/include/uapi/asm/kvm.h +++ b/arch/arm64/include/uapi/asm/kvm.h @@ -109,6 +109,7 @@ struct kvm_regs { #define KVM_ARM_VCPU_SVE 4 /* enable SVE for this CPU */ #define KVM_ARM_VCPU_PTRAUTH_ADDRESS 5 /* VCPU uses address authentication */ #define KVM_ARM_VCPU_PTRAUTH_GENERIC 6 /* VCPU uses generic authentication */ +#define KVM_ARM_VCPU_REC 7 /* VCPU REC state as part of Realm */ struct kvm_vcpu_init { __u32 target; @@ -401,6 +402,68 @@ enum { #define KVM_DEV_ARM_VGIC_SAVE_PENDING_TABLES 3 #define KVM_DEV_ARM_ITS_CTRL_RESET 4 +/* KVM_CAP_ARM_RME on VM fd */ +#define KVM_CAP_ARM_RME_CONFIG_REALM 0 +#define KVM_CAP_ARM_RME_CREATE_RD 1 +#define KVM_CAP_ARM_RME_INIT_IPA_REALM 2 +#define KVM_CAP_ARM_RME_POPULATE_REALM 3 +#define KVM_CAP_ARM_RME_ACTIVATE_REALM 4 + +#define KVM_CAP_ARM_RME_MEASUREMENT_ALGO_SHA256 0 +#define KVM_CAP_ARM_RME_MEASUREMENT_ALGO_SHA512 1 + +#define KVM_CAP_ARM_RME_RPV_SIZE 64 + +/* List of configuration items accepted for KVM_CAP_ARM_RME_CONFIG_REALM */ +#define KVM_CAP_ARM_RME_CFG_RPV 0 +#define KVM_CAP_ARM_RME_CFG_HASH_ALGO 1 +#define KVM_CAP_ARM_RME_CFG_SVE 2 +#define KVM_CAP_ARM_RME_CFG_DBG 3 +#define KVM_CAP_ARM_RME_CFG_PMU 4 + +struct kvm_cap_arm_rme_config_item { + __u32 cfg; + union { + /* cfg == KVM_CAP_ARM_RME_CFG_RPV */ + struct { + __u8 rpv[KVM_CAP_ARM_RME_RPV_SIZE]; + }; + + /* cfg == KVM_CAP_ARM_RME_CFG_HASH_ALGO */ + struct { + __u32 hash_algo; + }; + + /* cfg == KVM_CAP_ARM_RME_CFG_SVE */ + struct { + __u32 sve_vq; + }; + + /* cfg == KVM_CAP_ARM_RME_CFG_DBG */ + struct { + __u32 num_brps; + __u32 num_wrps; + }; + + /* cfg == KVM_CAP_ARM_RME_CFG_PMU */ + struct { + __u32 num_pmu_cntrs; + }; + /* Fix the size of the union */ + __u8 reserved[256]; + }; +}; + +struct kvm_cap_arm_rme_populate_realm_args { + __u64 populate_ipa_base; + __u64 populate_ipa_size; +}; + +struct kvm_cap_arm_rme_init_ipa_args { + __u64 init_ipa_base; + __u64 init_ipa_size; +}; + /* Device Control API on vcpu fd */ #define KVM_ARM_VCPU_PMU_V3_CTRL 0 #define KVM_ARM_VCPU_PMU_V3_IRQ 0 diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 20522d4ba1e0..fec1909e8b73 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1176,6 +1176,8 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_S390_PROTECTED_ASYNC_DISABLE 224 #define KVM_CAP_DIRTY_LOG_RING_WITH_BITMAP 225 +#define KVM_CAP_ARM_RME 300 // FIXME: Large number to prevent conflicts + #ifdef KVM_CAP_IRQ_ROUTING struct kvm_irq_routing_irqchip { -- 2.34.1