From patchwork Mon Aug 1 21:12:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Elliot Berman X-Patchwork-Id: 594917 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 8D986C25B08 for ; Mon, 1 Aug 2022 21:14:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234487AbiHAVOC (ORCPT ); Mon, 1 Aug 2022 17:14:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41036 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231152AbiHAVOA (ORCPT ); Mon, 1 Aug 2022 17:14:00 -0400 Received: from alexa-out-sd-02.qualcomm.com (alexa-out-sd-02.qualcomm.com [199.106.114.39]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 11A0A39BA0; Mon, 1 Aug 2022 14:13:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; i=@quicinc.com; q=dns/txt; s=qcdkim; t=1659388439; x=1690924439; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=J9519SgLqABIUbX23vSTKPiAzykXv5PmWxk67sQPv0w=; b=y7Qm6VPecl0if6lnJhERAp5lmIpxHgdmJX7ZR7qf1ss8k3aTRbGPVoTK kYHuLUbgFl7x8FncFA8XfQloxpStMtqlLphqhOVh1e4CoCCI9NDH4zA7t iZrb+GUPNigJQdeUJK3LuIPBgvYTFlPgR9r0TgKAAgpqPbb8HRr1li4dE 0=; Received: from unknown (HELO ironmsg01-sd.qualcomm.com) ([10.53.140.141]) by alexa-out-sd-02.qualcomm.com with ESMTP; 01 Aug 2022 14:13:58 -0700 X-QCInternal: smtphost Received: from nasanex01b.na.qualcomm.com ([10.46.141.250]) by ironmsg01-sd.qualcomm.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Aug 2022 14:13:58 -0700 Received: from hu-eberman-lv.qualcomm.com (10.49.16.6) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.22; Mon, 1 Aug 2022 14:13:57 -0700 From: Elliot Berman To: Bjorn Andersson CC: Elliot Berman , Murali Nalajala , Trilok Soni , "Srivatsa Vaddagiri" , Carl van Schaik , Andy Gross , , Lorenzo Pieralisi , Sudeep Holla , "Marc Zyngier" , Rob Herring , "Krzysztof Kozlowski" , Jonathan Corbet , Will Deacon , Catalin Marinas , , , Subject: [PATCH v2 05/11] virt: gunyah: Add sysfs nodes Date: Mon, 1 Aug 2022 14:12:34 -0700 Message-ID: <20220801211240.597859-6-quic_eberman@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220801211240.597859-1-quic_eberman@quicinc.com> References: <20220801211240.597859-1-quic_eberman@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01c.na.qualcomm.com (10.47.97.35) To nasanex01b.na.qualcomm.com (10.46.141.250) Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add /sys/hypervisor support when detecting that Linux is running in a Gunyah environment. Export the version of Gunyah which is reported via the hyp_identify hypercall. Signed-off-by: Elliot Berman --- .../ABI/testing/sysfs-hypervisor-gunyah | 37 +++++ MAINTAINERS | 2 + arch/arm64/include/asm/gunyah.h | 4 + drivers/virt/Kconfig | 1 + drivers/virt/Makefile | 1 + drivers/virt/gunyah/Kconfig | 13 ++ drivers/virt/gunyah/Makefile | 4 + drivers/virt/gunyah/sysfs.c | 139 ++++++++++++++++++ 8 files changed, 201 insertions(+) create mode 100644 Documentation/ABI/testing/sysfs-hypervisor-gunyah create mode 100644 drivers/virt/gunyah/Kconfig create mode 100644 drivers/virt/gunyah/Makefile create mode 100644 drivers/virt/gunyah/sysfs.c diff --git a/Documentation/ABI/testing/sysfs-hypervisor-gunyah b/Documentation/ABI/testing/sysfs-hypervisor-gunyah new file mode 100644 index 000000000000..41bce1965c91 --- /dev/null +++ b/Documentation/ABI/testing/sysfs-hypervisor-gunyah @@ -0,0 +1,37 @@ +What: /sys/hypervisor/type +Date: August 2022 +KernelVersion: 5.20 +Contact: linux-arm-msm@vger.kernel.org +Description: If running under Gunyah: + Type of hypervisor: + "gunyah": Gunyah hypervisor + +What: /sys/hypervisor/features +Date: August 2022 +KernelVersion: 5.20 +Contact: linux-arm-msm@vger.kernel.org +Description: If running under Gunyah: + Space separated list of features supported by Linux and Gunyah: + "cspace": Gunyah devices + "doorbell": Sending/receiving virtual interrupts via Gunyah doorbells + "message-queue": Sending/receiving messages via Gunyah message queues + "vic": Interrupt lending + "vpm": Virtual platform management + "vcpu": Virtual CPU management + "memextent": Memory lending/management + "trace": Gunyah hypervisor tracing + + +What: /sys/hypervisor/version/api +Date: August 2022 +KernelVersion: 5.20 +Contact: linux-arm-msm@vger.kernel.org +Description: If running under Gunyah: + The Gunyah API version. + +What: /sys/hypervisor/version/variant +Date: August 2022 +KernelVersion: 5.20 +Contact: linux-arm-msm@vger.kernel.org +Description: If running under Gunyah: + The Gunyah variant (build) version. \ No newline at end of file diff --git a/MAINTAINERS b/MAINTAINERS index 2e4f1d9ed47b..e63c51ee1a2a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8741,9 +8741,11 @@ M: Elliot Berman M: Murali Nalajala L: linux-arm-msm@vger.kernel.org S: Maintained +F: Documentation/ABI/testing/sysfs-hypervisor-gunyah F: Documentation/devicetree/bindings/firmware/gunyah-hypervisor.yaml F: Documentation/virt/gunyah/ F: arch/arm64/include/asm/gunyah.h +F: drivers/virt/gunyah/ F: include/linux/gunyah.h HABANALABS PCI DRIVER diff --git a/arch/arm64/include/asm/gunyah.h b/arch/arm64/include/asm/gunyah.h index 4820e9389f40..3aee35009910 100644 --- a/arch/arm64/include/asm/gunyah.h +++ b/arch/arm64/include/asm/gunyah.h @@ -19,11 +19,15 @@ (GH_CALL_TYPE_SERVICE << GH_CALL_TYPE_SHIFT) \ | ((fn) & GH_CALL_FUNCTION_NUM_MASK)) +#define GH_HYPERCALL_CALL_UID GH_SERVICE(0x3f01) + #define GH_HYPERCALL(fn) ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_64, \ ARM_SMCCC_OWNER_VENDOR_HYP, \ (GH_CALL_TYPE_HYPERCALL << GH_CALL_TYPE_SHIFT) \ | ((fn) & GH_CALL_FUNCTION_NUM_MASK)) +#define GH_HYPERCALL_HYP_IDENTIFY GH_HYPERCALL(0x0000) + #define ___gh_count_args(_0, _1, _2, _3, _4, _5, _6, _7, _8, x, ...) x #define __gh_count_args(...) \ diff --git a/drivers/virt/Kconfig b/drivers/virt/Kconfig index 87ef258cec64..259dc2be6cad 100644 --- a/drivers/virt/Kconfig +++ b/drivers/virt/Kconfig @@ -52,4 +52,5 @@ source "drivers/virt/coco/efi_secret/Kconfig" source "drivers/virt/coco/sev-guest/Kconfig" +source "drivers/virt/gunyah/Kconfig" endif diff --git a/drivers/virt/Makefile b/drivers/virt/Makefile index 093674e05c40..ec4fdfa8eef1 100644 --- a/drivers/virt/Makefile +++ b/drivers/virt/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_FSL_HV_MANAGER) += fsl_hypervisor.o obj-$(CONFIG_VMGENID) += vmgenid.o obj-y += vboxguest/ +obj-$(CONFIG_GUNYAH) += gunyah/ obj-$(CONFIG_NITRO_ENCLAVES) += nitro_enclaves/ obj-$(CONFIG_ACRN_HSM) += acrn/ diff --git a/drivers/virt/gunyah/Kconfig b/drivers/virt/gunyah/Kconfig new file mode 100644 index 000000000000..1e493017885e --- /dev/null +++ b/drivers/virt/gunyah/Kconfig @@ -0,0 +1,13 @@ +# SPDX-License-Identifier: GPL-2.0-only + +config GUNYAH + tristate "Gunyah Virtualization drivers" + depends on ARM64 + select SYS_HYPERVISOR + help + The Gunyah drivers are the helper interfaces that runs in a guest VM + such as basic inter-VM IPC and signaling mechanisms and higher level + services such as memory/device sharing, IRQ sharing, and so on. + + Say Y here to enable the drivers needed to interact in a Gunyah + virtual environment. diff --git a/drivers/virt/gunyah/Makefile b/drivers/virt/gunyah/Makefile new file mode 100644 index 000000000000..0aa086f9149f --- /dev/null +++ b/drivers/virt/gunyah/Makefile @@ -0,0 +1,4 @@ +# SPDX-License-Identifier: GPL-2.0-only + +gunyah-y += sysfs.o +obj-$(CONFIG_GUNYAH) += gunyah.o \ No newline at end of file diff --git a/drivers/virt/gunyah/sysfs.c b/drivers/virt/gunyah/sysfs.c new file mode 100644 index 000000000000..253433a939cf --- /dev/null +++ b/drivers/virt/gunyah/sysfs.c @@ -0,0 +1,139 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#define pr_fmt(fmt) "gunyah: " fmt + +#include +#include +#include +#include +#include +#include + +#define QC_HYP_UID0 0x19bd54bd +#define QC_HYP_UID1 0x0b37571b +#define QC_HYP_UID2 0x946f609b +#define QC_HYP_UID3 0x54539de6 + +#define GUNYAH_UID0 0x673d5f14 +#define GUNYAH_UID1 0x9265ce36 +#define GUNYAH_UID2 0xa4535fdb +#define GUNYAH_UID3 0xc1d58fcd + +#define gh_uid_matches(prefix, uid) \ + ((uid)[0] == prefix ## _UID0 && (uid)[1] == prefix ## _UID1 && \ + (uid)[2] == prefix ## _UID2 && (uid)[3] == prefix ## _UID3) + +#define GH_API_INFO_API_VERSION(x) (((x) >> 0) & 0x3fff) +#define GH_API_INFO_BIG_ENDIAN(x) (((x) >> 14) & 1) +#define GH_API_INFO_IS_64BIT(x) (((x) >> 15) & 1) +#define GH_API_INFO_VARIANT(x) (((x) >> 56) & 0xff) + +#define GH_IDENTIFY_PARTITION_CSPACE(flags) (((flags)[0] >> 0) & 1) +#define GH_IDENTIFY_DOORBELL(flags) (((flags)[0] >> 1) & 1) +#define GH_IDENTIFY_MSGQUEUE(flags) (((flags)[0] >> 2) & 1) +#define GH_IDENTIFY_VIC(flags) (((flags)[0] >> 3) & 1) +#define GH_IDENTIFY_VPM(flags) (((flags)[0] >> 4) & 1) +#define GH_IDENTIFY_VCPU(flags) (((flags)[0] >> 5) & 1) +#define GH_IDENTIFY_MEMEXTENT(flags) (((flags)[0] >> 6) & 1) +#define GH_IDENTIFY_TRACE_CTRL(flags) (((flags)[0] >> 7) & 1) + +struct gh_hypercall_hyp_identify_resp { + u64 api_info; + u64 flags[3]; +}; + +static struct gh_hypercall_hyp_identify_resp gunyah_api; + +static ssize_t type_show(struct kobject *kobj, struct kobj_attribute *attr, char *buffer) +{ + return sysfs_emit(buffer, "gunyah\n"); +} +static struct kobj_attribute type_attr = __ATTR_RO(type); + +static ssize_t api_show(struct kobject *kobj, struct kobj_attribute *attr, char *buffer) +{ + return sysfs_emit(buffer, "%d\n", (int)GH_API_INFO_API_VERSION(gunyah_api.api_info)); +} +static struct kobj_attribute api_attr = __ATTR_RO(api); + +static ssize_t variant_show(struct kobject *kobj, struct kobj_attribute *attr, char *buffer) +{ + return sysfs_emit(buffer, "%d\n", (int)GH_API_INFO_VARIANT(gunyah_api.api_info)); +} +static struct kobj_attribute variant_attr = __ATTR_RO(variant); + +static ssize_t features_show(struct kobject *kobj, struct kobj_attribute *attr, char *buffer) +{ + return sysfs_emit(buffer, "\n"); +} +static struct kobj_attribute features_attr = __ATTR_RO(features); + +static struct attribute *version_attrs[] = { + &api_attr.attr, + &variant_attr.attr, + NULL +}; + +static const struct attribute_group version_group = { + .name = "version", + .attrs = version_attrs, +}; + +static int __init gh_sysfs_register(void) +{ + int ret; + + ret = sysfs_create_file(hypervisor_kobj, &type_attr.attr); + if (ret) + return ret; + + ret = sysfs_create_group(hypervisor_kobj, &version_group); + if (ret) + return ret; + + return sysfs_create_file(hypervisor_kobj, &features_attr.attr); +} + +static void gh_sysfs_unregister(void) +{ + sysfs_remove_file(hypervisor_kobj, &type_attr.attr); + sysfs_remove_group(hypervisor_kobj, &version_group); +} + +static int __init gunyah_init(void) +{ + unsigned long uid[4]; + + arch_gh_hypercall(GH_HYPERCALL_CALL_UID, 0, uid[0], uid[1], uid[2], uid[3]); + + if (!(gh_uid_matches(GUNYAH, uid) || gh_uid_matches(QC_HYP, uid))) + return 0; + + arch_gh_hypercall(GH_HYPERCALL_HYP_IDENTIFY, 0, gunyah_api.api_info, + gunyah_api.flags[0], gunyah_api.flags[1], gunyah_api.flags[2]); + + if (GH_API_INFO_API_VERSION(gunyah_api.api_info) != 1) { + pr_warn("Unrecognized gunyah version: %llu. Currently supported: 1\n", + GH_API_INFO_API_VERSION(gunyah_api.api_info)); + return 0; + } + + pr_notice("Running under Gunyah hypervisor v%lld/%llx\n", + GH_API_INFO_API_VERSION(gunyah_api.api_info), + GH_API_INFO_VARIANT(gunyah_api.api_info)); + + return gh_sysfs_register(); +} +module_init(gunyah_init); + +static void __exit gunyah_exit(void) +{ + gh_sysfs_unregister(); +} +module_exit(gunyah_exit); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("Gunyah Hypervisor Driver");