From: Michael Kelley <mikelley@microsoft.com> To: will@kernel.org, catalin.marinas@arm.com, mark.rutland@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-efi@vger.kernel.org, wei.liu@kernel.org, kys@microsoft.com, sthemmin@microsoft.com, ardb@kernel.org Cc: mikelley@microsoft.com Subject: [PATCH v11 3/5] arm64: hyperv: Initialize hypervisor on boot Date: Tue, 20 Jul 2021 07:57:01 -0700 [thread overview] Message-ID: <1626793023-13830-4-git-send-email-mikelley@microsoft.com> (raw) In-Reply-To: <1626793023-13830-1-git-send-email-mikelley@microsoft.com> Add ARM64-specific code to initialize the Hyper-V hypervisor when booting as a guest VM. This code is built only when CONFIG_HYPERV is enabled. Signed-off-by: Michael Kelley <mikelley@microsoft.com> --- arch/arm64/hyperv/Makefile | 2 +- arch/arm64/hyperv/mshyperv.c | 83 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 84 insertions(+), 1 deletion(-) create mode 100644 arch/arm64/hyperv/mshyperv.c diff --git a/arch/arm64/hyperv/Makefile b/arch/arm64/hyperv/Makefile index 1697d30..87c31c0 100644 --- a/arch/arm64/hyperv/Makefile +++ b/arch/arm64/hyperv/Makefile @@ -1,2 +1,2 @@ # SPDX-License-Identifier: GPL-2.0 -obj-y := hv_core.o +obj-y := hv_core.o mshyperv.o diff --git a/arch/arm64/hyperv/mshyperv.c b/arch/arm64/hyperv/mshyperv.c new file mode 100644 index 0000000..2811fd0 --- /dev/null +++ b/arch/arm64/hyperv/mshyperv.c @@ -0,0 +1,83 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Core routines for interacting with Microsoft's Hyper-V hypervisor, + * including hypervisor initialization. + * + * Copyright (C) 2021, Microsoft, Inc. + * + * Author : Michael Kelley <mikelley@microsoft.com> + */ + +#include <linux/types.h> +#include <linux/acpi.h> +#include <linux/export.h> +#include <linux/errno.h> +#include <linux/version.h> +#include <linux/cpuhotplug.h> +#include <asm/mshyperv.h> + +static bool hyperv_initialized; + +static int __init hyperv_init(void) +{ + struct hv_get_vp_registers_output result; + u32 a, b, c, d; + u64 guest_id; + int ret; + + /* + * If we're in a VM on Hyper-V, the ACPI hypervisor_id field will + * have the string "MsHyperV". + */ + if (strncmp((char *)&acpi_gbl_FADT.hypervisor_id, "MsHyperV", 8)) + return -EINVAL; + + /* Setup the guest ID */ + guest_id = generate_guest_id(0, LINUX_VERSION_CODE, 0); + hv_set_vpreg(HV_REGISTER_GUEST_OSID, guest_id); + + /* Get the features and hints from Hyper-V */ + hv_get_vpreg_128(HV_REGISTER_FEATURES, &result); + ms_hyperv.features = result.as32.a; + ms_hyperv.priv_high = result.as32.b; + ms_hyperv.misc_features = result.as32.c; + + hv_get_vpreg_128(HV_REGISTER_ENLIGHTENMENTS, &result); + ms_hyperv.hints = result.as32.a; + + pr_info("Hyper-V: privilege flags low 0x%x, high 0x%x, hints 0x%x, misc 0x%x\n", + ms_hyperv.features, ms_hyperv.priv_high, ms_hyperv.hints, + ms_hyperv.misc_features); + + /* Get information about the Hyper-V host version */ + hv_get_vpreg_128(HV_REGISTER_HYPERVISOR_VERSION, &result); + a = result.as32.a; + b = result.as32.b; + c = result.as32.c; + d = result.as32.d; + pr_info("Hyper-V: Host Build %d.%d.%d.%d-%d-%d\n", + b >> 16, b & 0xFFFF, a, d & 0xFFFFFF, c, d >> 24); + + ret = hv_common_init(); + if (ret) + return ret; + + ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "arm64/hyperv_init:online", + hv_common_cpu_init, hv_common_cpu_die); + if (ret < 0) { + hv_common_free(); + return ret; + } + + hyperv_initialized = true; + return 0; +} + +early_initcall(hyperv_init); + +bool hv_is_hyperv_initialized(void) +{ + return hyperv_initialized; +} +EXPORT_SYMBOL_GPL(hv_is_hyperv_initialized); -- 1.8.3.1
WARNING: multiple messages have this Message-ID (diff)
From: Michael Kelley <mikelley@microsoft.com> To: will@kernel.org, catalin.marinas@arm.com, mark.rutland@arm.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-efi@vger.kernel.org, wei.liu@kernel.org, kys@microsoft.com, sthemmin@microsoft.com, ardb@kernel.org Cc: mikelley@microsoft.com Subject: [PATCH v11 3/5] arm64: hyperv: Initialize hypervisor on boot Date: Tue, 20 Jul 2021 07:57:01 -0700 [thread overview] Message-ID: <1626793023-13830-4-git-send-email-mikelley@microsoft.com> (raw) In-Reply-To: <1626793023-13830-1-git-send-email-mikelley@microsoft.com> Add ARM64-specific code to initialize the Hyper-V hypervisor when booting as a guest VM. This code is built only when CONFIG_HYPERV is enabled. Signed-off-by: Michael Kelley <mikelley@microsoft.com> --- arch/arm64/hyperv/Makefile | 2 +- arch/arm64/hyperv/mshyperv.c | 83 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 84 insertions(+), 1 deletion(-) create mode 100644 arch/arm64/hyperv/mshyperv.c diff --git a/arch/arm64/hyperv/Makefile b/arch/arm64/hyperv/Makefile index 1697d30..87c31c0 100644 --- a/arch/arm64/hyperv/Makefile +++ b/arch/arm64/hyperv/Makefile @@ -1,2 +1,2 @@ # SPDX-License-Identifier: GPL-2.0 -obj-y := hv_core.o +obj-y := hv_core.o mshyperv.o diff --git a/arch/arm64/hyperv/mshyperv.c b/arch/arm64/hyperv/mshyperv.c new file mode 100644 index 0000000..2811fd0 --- /dev/null +++ b/arch/arm64/hyperv/mshyperv.c @@ -0,0 +1,83 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Core routines for interacting with Microsoft's Hyper-V hypervisor, + * including hypervisor initialization. + * + * Copyright (C) 2021, Microsoft, Inc. + * + * Author : Michael Kelley <mikelley@microsoft.com> + */ + +#include <linux/types.h> +#include <linux/acpi.h> +#include <linux/export.h> +#include <linux/errno.h> +#include <linux/version.h> +#include <linux/cpuhotplug.h> +#include <asm/mshyperv.h> + +static bool hyperv_initialized; + +static int __init hyperv_init(void) +{ + struct hv_get_vp_registers_output result; + u32 a, b, c, d; + u64 guest_id; + int ret; + + /* + * If we're in a VM on Hyper-V, the ACPI hypervisor_id field will + * have the string "MsHyperV". + */ + if (strncmp((char *)&acpi_gbl_FADT.hypervisor_id, "MsHyperV", 8)) + return -EINVAL; + + /* Setup the guest ID */ + guest_id = generate_guest_id(0, LINUX_VERSION_CODE, 0); + hv_set_vpreg(HV_REGISTER_GUEST_OSID, guest_id); + + /* Get the features and hints from Hyper-V */ + hv_get_vpreg_128(HV_REGISTER_FEATURES, &result); + ms_hyperv.features = result.as32.a; + ms_hyperv.priv_high = result.as32.b; + ms_hyperv.misc_features = result.as32.c; + + hv_get_vpreg_128(HV_REGISTER_ENLIGHTENMENTS, &result); + ms_hyperv.hints = result.as32.a; + + pr_info("Hyper-V: privilege flags low 0x%x, high 0x%x, hints 0x%x, misc 0x%x\n", + ms_hyperv.features, ms_hyperv.priv_high, ms_hyperv.hints, + ms_hyperv.misc_features); + + /* Get information about the Hyper-V host version */ + hv_get_vpreg_128(HV_REGISTER_HYPERVISOR_VERSION, &result); + a = result.as32.a; + b = result.as32.b; + c = result.as32.c; + d = result.as32.d; + pr_info("Hyper-V: Host Build %d.%d.%d.%d-%d-%d\n", + b >> 16, b & 0xFFFF, a, d & 0xFFFFFF, c, d >> 24); + + ret = hv_common_init(); + if (ret) + return ret; + + ret = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "arm64/hyperv_init:online", + hv_common_cpu_init, hv_common_cpu_die); + if (ret < 0) { + hv_common_free(); + return ret; + } + + hyperv_initialized = true; + return 0; +} + +early_initcall(hyperv_init); + +bool hv_is_hyperv_initialized(void) +{ + return hyperv_initialized; +} +EXPORT_SYMBOL_GPL(hv_is_hyperv_initialized); -- 1.8.3.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-07-20 15:08 UTC|newest] Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-07-20 14:56 [PATCH v11 0/5] Enable Linux guests on Hyper-V on ARM64 Michael Kelley 2021-07-20 14:56 ` Michael Kelley 2021-07-20 14:56 ` [PATCH v11 1/5] arm64: hyperv: Add Hyper-V hypercall and register access utilities Michael Kelley 2021-07-20 14:56 ` Michael Kelley 2021-07-20 14:57 ` [PATCH v11 2/5] arm64: hyperv: Add panic handler Michael Kelley 2021-07-20 14:57 ` Michael Kelley 2021-07-21 14:54 ` Boqun Feng 2021-07-21 14:54 ` Boqun Feng 2021-07-27 17:08 ` Sunil Muthuswamy 2021-07-27 17:08 ` Sunil Muthuswamy 2021-07-20 14:57 ` Michael Kelley [this message] 2021-07-20 14:57 ` [PATCH v11 3/5] arm64: hyperv: Initialize hypervisor on boot Michael Kelley 2021-07-21 14:55 ` Boqun Feng 2021-07-21 14:55 ` Boqun Feng 2021-07-27 17:05 ` Sunil Muthuswamy 2021-07-27 17:05 ` Sunil Muthuswamy 2021-08-02 15:55 ` Marc Zyngier 2021-08-02 15:55 ` Marc Zyngier 2021-08-02 16:26 ` Mark Rutland 2021-08-02 16:26 ` Mark Rutland 2021-08-02 17:13 ` Michael Kelley 2021-08-02 17:13 ` Michael Kelley 2021-07-20 14:57 ` [PATCH v11 4/5] arm64: efi: Export screen_info Michael Kelley 2021-07-20 14:57 ` Michael Kelley 2021-07-20 14:57 ` [PATCH v11 5/5] Drivers: hv: Enable Hyper-V code to be built on ARM64 Michael Kelley 2021-07-20 14:57 ` Michael Kelley 2021-07-21 14:52 ` Boqun Feng 2021-07-21 14:52 ` Boqun Feng 2021-08-02 15:15 ` [PATCH v11 0/5] Enable Linux guests on Hyper-V " Michael Kelley 2021-08-02 15:15 ` Michael Kelley 2021-08-02 16:01 ` Marc Zyngier 2021-08-02 16:01 ` Marc Zyngier 2021-08-02 16:28 ` Mark Rutland 2021-08-02 16:28 ` Mark Rutland
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