From: Elliot Berman <quic_eberman@quicinc.com>
To: Alex Elder <elder@linaro.org>,
Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Elliot Berman <quic_eberman@quicinc.com>,
Prakruthi Deepak Heragu <quic_pheragu@quicinc.com>
Cc: Murali Nalajala <quic_mnalajal@quicinc.com>,
Trilok Soni <quic_tsoni@quicinc.com>,
Srivatsa Vaddagiri <quic_svaddagi@quicinc.com>,
Carl van Schaik <quic_cvanscha@quicinc.com>,
Dmitry Baryshkov <dmitry.baryshkov@linaro.org>,
Bjorn Andersson <andersson@kernel.org>,
"Konrad Dybcio" <konrad.dybcio@linaro.org>,
Arnd Bergmann <arnd@arndb.de>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
Rob Herring <robh+dt@kernel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Jonathan Corbet <corbet@lwn.net>,
Bagas Sanjaya <bagasdotme@gmail.com>,
Andy Gross <agross@kernel.org>,
Jassi Brar <jassisinghbrar@gmail.com>,
<linux-arm-msm@vger.kernel.org>, <devicetree@vger.kernel.org>,
<linux-kernel@vger.kernel.org>, <linux-doc@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>
Subject: [PATCH v13 03/24] virt: gunyah: Add hypercalls to identify Gunyah
Date: Tue, 9 May 2023 13:47:40 -0700 [thread overview]
Message-ID: <20230509204801.2824351-4-quic_eberman@quicinc.com> (raw)
In-Reply-To: <20230509204801.2824351-1-quic_eberman@quicinc.com>
Add hypercalls to identify when Linux is running a virtual machine under
Gunyah.
There are two calls to help identify Gunyah:
1. gh_hypercall_get_uid() returns a UID when running under a Gunyah
hypervisor.
2. gh_hypercall_hyp_identify() returns build information and a set of
feature flags that are supported by Gunyah.
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Elliot Berman <quic_eberman@quicinc.com>
---
arch/arm64/Kbuild | 1 +
arch/arm64/gunyah/Makefile | 3 ++
arch/arm64/gunyah/gunyah_hypercall.c | 56 ++++++++++++++++++++++++++++
drivers/virt/Kconfig | 2 +
drivers/virt/gunyah/Kconfig | 13 +++++++
include/linux/gunyah.h | 31 +++++++++++++++
6 files changed, 106 insertions(+)
create mode 100644 arch/arm64/gunyah/Makefile
create mode 100644 arch/arm64/gunyah/gunyah_hypercall.c
create mode 100644 drivers/virt/gunyah/Kconfig
diff --git a/arch/arm64/Kbuild b/arch/arm64/Kbuild
index 5bfbf7d79c99..e4847ba0e3c9 100644
--- a/arch/arm64/Kbuild
+++ b/arch/arm64/Kbuild
@@ -3,6 +3,7 @@ obj-y += kernel/ mm/ net/
obj-$(CONFIG_KVM) += kvm/
obj-$(CONFIG_XEN) += xen/
obj-$(subst m,y,$(CONFIG_HYPERV)) += hyperv/
+obj-$(CONFIG_GUNYAH) += gunyah/
obj-$(CONFIG_CRYPTO) += crypto/
# for cleaning
diff --git a/arch/arm64/gunyah/Makefile b/arch/arm64/gunyah/Makefile
new file mode 100644
index 000000000000..84f1e38cafb1
--- /dev/null
+++ b/arch/arm64/gunyah/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_GUNYAH) += gunyah_hypercall.o
diff --git a/arch/arm64/gunyah/gunyah_hypercall.c b/arch/arm64/gunyah/gunyah_hypercall.c
new file mode 100644
index 000000000000..2166d5dab869
--- /dev/null
+++ b/arch/arm64/gunyah/gunyah_hypercall.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved.
+ */
+
+#include <linux/arm-smccc.h>
+#include <linux/module.h>
+#include <linux/gunyah.h>
+#include <linux/uuid.h>
+
+/* {c1d58fcd-a453-5fdb-9265-ce36673d5f14} */
+static const uuid_t GUNYAH_UUID =
+ UUID_INIT(0xc1d58fcd, 0xa453, 0x5fdb, 0x92, 0x65, 0xce, 0x36, 0x67, 0x3d, 0x5f, 0x14);
+
+bool arch_is_gh_guest(void)
+{
+ struct arm_smccc_res res;
+ uuid_t uuid;
+
+ arm_smccc_1_1_hvc(ARM_SMCCC_VENDOR_HYP_CALL_UID_FUNC_ID, &res);
+
+ ((u32 *)&uuid.b[0])[0] = lower_32_bits(res.a0);
+ ((u32 *)&uuid.b[0])[1] = lower_32_bits(res.a1);
+ ((u32 *)&uuid.b[0])[2] = lower_32_bits(res.a2);
+ ((u32 *)&uuid.b[0])[3] = lower_32_bits(res.a3);
+
+ return uuid_equal(&uuid, &GUNYAH_UUID);
+}
+EXPORT_SYMBOL_GPL(arch_is_gh_guest);
+
+#define GH_HYPERCALL(fn) ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_64, \
+ ARM_SMCCC_OWNER_VENDOR_HYP, \
+ fn)
+
+#define GH_HYPERCALL_HYP_IDENTIFY GH_HYPERCALL(0x8000)
+
+/**
+ * gh_hypercall_hyp_identify() - Returns build information and feature flags
+ * supported by Gunyah.
+ * @hyp_identity: filled by the hypercall with the API info and feature flags.
+ */
+void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identity)
+{
+ struct arm_smccc_res res;
+
+ arm_smccc_1_1_hvc(GH_HYPERCALL_HYP_IDENTIFY, &res);
+
+ hyp_identity->api_info = res.a0;
+ hyp_identity->flags[0] = res.a1;
+ hyp_identity->flags[1] = res.a2;
+ hyp_identity->flags[2] = res.a3;
+}
+EXPORT_SYMBOL_GPL(gh_hypercall_hyp_identify);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Gunyah Hypervisor Hypercalls");
diff --git a/drivers/virt/Kconfig b/drivers/virt/Kconfig
index f79ab13a5c28..85bd6626ffc9 100644
--- a/drivers/virt/Kconfig
+++ b/drivers/virt/Kconfig
@@ -54,4 +54,6 @@ source "drivers/virt/coco/sev-guest/Kconfig"
source "drivers/virt/coco/tdx-guest/Kconfig"
+source "drivers/virt/gunyah/Kconfig"
+
endif
diff --git a/drivers/virt/gunyah/Kconfig b/drivers/virt/gunyah/Kconfig
new file mode 100644
index 000000000000..1a737694c333
--- /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
+ depends on MAILBOX
+ help
+ The Gunyah drivers are the helper interfaces that run 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/M here to enable the drivers needed to interact in a Gunyah
+ virtual environment.
diff --git a/include/linux/gunyah.h b/include/linux/gunyah.h
index a4e8ec91961d..6b36cf4787ef 100644
--- a/include/linux/gunyah.h
+++ b/include/linux/gunyah.h
@@ -6,8 +6,10 @@
#ifndef _LINUX_GUNYAH_H
#define _LINUX_GUNYAH_H
+#include <linux/bitfield.h>
#include <linux/errno.h>
#include <linux/limits.h>
+#include <linux/types.h>
/******************************************************************************/
/* Common arch-independent definitions for Gunyah hypercalls */
@@ -80,4 +82,33 @@ static inline int gh_error_remap(enum gh_error gh_error)
}
}
+enum gh_api_feature {
+ GH_FEATURE_DOORBELL = 1,
+ GH_FEATURE_MSGQUEUE = 2,
+ GH_FEATURE_VCPU = 5,
+ GH_FEATURE_MEMEXTENT = 6,
+};
+
+bool arch_is_gh_guest(void);
+
+#define GH_API_V1 1
+
+/* Other bits reserved for future use and will be zero */
+#define GH_API_INFO_API_VERSION_MASK GENMASK_ULL(13, 0)
+#define GH_API_INFO_BIG_ENDIAN BIT_ULL(14)
+#define GH_API_INFO_IS_64BIT BIT_ULL(15)
+#define GH_API_INFO_VARIANT_MASK GENMASK_ULL(63, 56)
+
+struct gh_hypercall_hyp_identify_resp {
+ u64 api_info;
+ u64 flags[3];
+};
+
+static inline u16 gh_api_version(const struct gh_hypercall_hyp_identify_resp *gh_api)
+{
+ return FIELD_GET(GH_API_INFO_API_VERSION_MASK, gh_api->api_info);
+}
+
+void gh_hypercall_hyp_identify(struct gh_hypercall_hyp_identify_resp *hyp_identity);
+
#endif
--
2.40.0
next prev parent reply other threads:[~2023-05-09 20:49 UTC|newest]
Thread overview: 80+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-09 20:47 [PATCH v13 00/24] Drivers for Gunyah hypervisor Elliot Berman
2023-05-09 20:47 ` [PATCH v13 01/24] dt-bindings: Add binding for gunyah hypervisor Elliot Berman
2023-06-05 19:47 ` Alex Elder
2023-05-09 20:47 ` [PATCH v13 02/24] gunyah: Common types and error codes for Gunyah hypercalls Elliot Berman
2023-06-05 19:47 ` Alex Elder
2023-06-05 21:31 ` Srinivas Kandagatla
2023-05-09 20:47 ` Elliot Berman [this message]
2023-06-05 19:47 ` [PATCH v13 03/24] virt: gunyah: Add hypercalls to identify Gunyah Alex Elder
2023-05-09 20:47 ` [PATCH v13 04/24] virt: gunyah: msgq: Add hypercalls to send and receive messages Elliot Berman
2023-06-05 19:47 ` Alex Elder
2023-06-05 21:31 ` Srinivas Kandagatla
2023-05-09 20:47 ` [PATCH v13 05/24] mailbox: Add Gunyah message queue mailbox Elliot Berman
2023-05-24 6:29 ` Dmitry Baryshkov
2023-06-05 19:47 ` Alex Elder
2023-06-05 21:32 ` Srinivas Kandagatla
2023-05-09 20:47 ` [PATCH v13 06/24] gunyah: rsc_mgr: Add resource manager RPC core Elliot Berman
2023-06-05 19:47 ` Alex Elder
2023-06-06 12:45 ` Srinivas Kandagatla
2023-05-09 20:47 ` [PATCH v13 07/24] gunyah: rsc_mgr: Add VM lifecycle RPC Elliot Berman
2023-06-05 19:47 ` Alex Elder
2023-06-06 12:49 ` Srinivas Kandagatla
2023-05-09 20:47 ` [PATCH v13 08/24] gunyah: vm_mgr: Introduce basic VM Manager Elliot Berman
2023-06-05 19:47 ` Alex Elder
2023-06-06 12:51 ` Srinivas Kandagatla
2023-05-09 20:47 ` [PATCH v13 09/24] gunyah: rsc_mgr: Add RPC for sharing memory Elliot Berman
2023-06-05 19:48 ` Alex Elder
2023-06-09 22:35 ` Elliot Berman
2023-06-06 13:35 ` Srinivas Kandagatla
2023-05-09 20:47 ` [PATCH v13 10/24] gunyah: vm_mgr: Add/remove user memory regions Elliot Berman
2023-05-19 11:59 ` Will Deacon
2023-05-19 17:02 ` Elliot Berman
2023-06-05 14:18 ` Will Deacon
2023-06-07 15:54 ` Elliot Berman
2023-06-22 23:56 ` Elliot Berman
2023-07-13 20:28 ` Elliot Berman
2023-07-14 12:13 ` Will Deacon
2023-07-19 2:28 ` Elliot Berman
2023-07-20 10:39 ` Will Deacon
2023-06-13 17:54 ` Elliot Berman
2023-06-05 19:48 ` Alex Elder
2023-05-09 20:47 ` [PATCH v13 11/24] gunyah: vm_mgr: Add ioctls to support basic non-proxy VM boot Elliot Berman
2023-06-05 19:48 ` Alex Elder
2023-05-09 20:47 ` [PATCH v13 12/24] samples: Add sample userspace Gunyah VM Manager Elliot Berman
2023-06-05 19:48 ` Alex Elder
2023-05-09 20:47 ` [PATCH v13 13/24] gunyah: rsc_mgr: Add platform ops on mem_lend/mem_reclaim Elliot Berman
2023-06-05 19:48 ` Alex Elder
2023-05-09 20:47 ` [PATCH v13 14/24] virt: gunyah: Add Qualcomm Gunyah platform ops Elliot Berman
2023-06-05 19:48 ` Alex Elder
2023-06-07 15:55 ` Elliot Berman
2023-05-09 20:47 ` [PATCH v13 15/24] docs: gunyah: Document Gunyah VM Manager Elliot Berman
2023-06-05 19:49 ` Alex Elder
2023-05-09 20:47 ` [PATCH v13 16/24] virt: gunyah: Translate gh_rm_hyp_resource into gunyah_resource Elliot Berman
2023-06-05 19:49 ` Alex Elder
2023-06-09 20:00 ` Elliot Berman
2023-05-09 20:47 ` [PATCH v13 17/24] gunyah: vm_mgr: Add framework for VM Functions Elliot Berman
2023-06-05 19:49 ` Alex Elder
2023-06-09 19:49 ` Elliot Berman
2023-06-12 12:57 ` Alex Elder
2023-05-09 20:47 ` [PATCH v13 18/24] virt: gunyah: Add resource tickets Elliot Berman
2023-06-05 19:49 ` Alex Elder
2023-05-09 20:47 ` [PATCH v13 19/24] virt: gunyah: Add IO handlers Elliot Berman
2023-06-05 19:50 ` Alex Elder
2023-05-09 20:47 ` [PATCH v13 20/24] virt: gunyah: Add proxy-scheduled vCPUs Elliot Berman
2023-06-05 19:50 ` Alex Elder
2023-05-09 20:47 ` [PATCH v13 21/24] virt: gunyah: Add hypercalls for sending doorbell Elliot Berman
2023-06-05 19:50 ` Alex Elder
2023-05-09 20:47 ` [PATCH v13 22/24] virt: gunyah: Add irqfd interface Elliot Berman
2023-06-05 19:50 ` Alex Elder
2023-06-09 18:22 ` Elliot Berman
2023-06-09 18:28 ` Alex Elder
2023-05-09 20:48 ` [PATCH v13 23/24] virt: gunyah: Add ioeventfd Elliot Berman
2023-06-05 19:50 ` Alex Elder
2023-06-09 17:33 ` Elliot Berman
2023-06-09 17:46 ` Alex Elder
2023-05-09 20:48 ` [PATCH v13 24/24] MAINTAINERS: Add Gunyah hypervisor drivers section Elliot Berman
2023-06-05 19:50 ` Alex Elder
2023-05-24 6:47 ` [PATCH v13 00/24] Drivers for Gunyah hypervisor Dmitry Baryshkov
2023-05-24 17:13 ` Alex Bennée
2023-06-13 23:02 ` Elliot Berman
2023-06-05 19:47 ` Alex Elder
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