From: Michael Kelley <mikelley@microsoft.com>
To: will@kernel.org, ardb@kernel.org, arnd@arndb.de,
catalin.marinas@arm.com, mark.rutland@arm.com, maz@kernel.org,
linux-arm-kernel@lists.infradead.org, gregkh@linuxfoundation.org,
linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org,
linux-efi@vger.kernel.org, linux-arch@vger.kernel.org,
wei.liu@kernel.org, vkuznets@redhat.com, kys@microsoft.com
Cc: mikelley@microsoft.com, sunilmut@microsoft.com, boqun.feng@gmail.com
Subject: [PATCH v7 02/10] arm64: hyperv: Add core Hyper-V include files
Date: Mon, 24 Aug 2020 09:46:15 -0700 [thread overview]
Message-ID: <1598287583-71762-3-git-send-email-mikelley@microsoft.com> (raw)
In-Reply-To: <1598287583-71762-1-git-send-email-mikelley@microsoft.com>
hyperv-tlfs.h defines Hyper-V interfaces from the Hyper-V Top Level
Functional Spec (TLFS), and #includes the architecture-independent
part of hyperv-tlfs.h in include/asm-generic. The published TLFS
is distinctly oriented to x86/x64, so the ARM64-specific
hyperv-tlfs.h includes information for ARM64 that is not yet formally
published. The TLFS is available here:
docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs
mshyperv.h defines Linux-specific structures and routines for
interacting with Hyper-V on ARM64, and #includes the architecture-
independent part of mshyperv.h in include/asm-generic.
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
---
MAINTAINERS | 2 +
arch/arm64/include/asm/hyperv-tlfs.h | 94 ++++++++++++++++++++++++++++++++++++
arch/arm64/include/asm/mshyperv.h | 76 +++++++++++++++++++++++++++++
3 files changed, 172 insertions(+)
create mode 100644 arch/arm64/include/asm/hyperv-tlfs.h
create mode 100644 arch/arm64/include/asm/mshyperv.h
diff --git a/MAINTAINERS b/MAINTAINERS
index 4179dfa..803bade 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8054,6 +8054,8 @@ T: git git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git
F: Documentation/ABI/stable/sysfs-bus-vmbus
F: Documentation/ABI/testing/debugfs-hyperv
F: Documentation/networking/device_drivers/ethernet/microsoft/netvsc.rst
+F: arch/arm64/include/asm/hyperv-tlfs.h
+F: arch/arm64/include/asm/mshyperv.h
F: arch/x86/hyperv
F: arch/x86/include/asm/hyperv-tlfs.h
F: arch/x86/include/asm/mshyperv.h
diff --git a/arch/arm64/include/asm/hyperv-tlfs.h b/arch/arm64/include/asm/hyperv-tlfs.h
new file mode 100644
index 0000000..09f5228
--- /dev/null
+++ b/arch/arm64/include/asm/hyperv-tlfs.h
@@ -0,0 +1,94 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/*
+ * This file contains definitions from the Hyper-V Hypervisor Top-Level
+ * Functional Specification (TLFS):
+ * https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs
+ *
+ * Copyright (C) 2019, Microsoft, Inc.
+ *
+ * Author : Michael Kelley <mikelley@microsoft.com>
+ */
+
+#ifndef _ASM_HYPERV_TLFS_H
+#define _ASM_HYPERV_TLFS_H
+
+#include <linux/types.h>
+
+/*
+ * All data structures defined in the TLFS that are shared between Hyper-V
+ * and a guest VM use Little Endian byte ordering. This matches the default
+ * byte ordering of Linux running on ARM64, so no special handling is required.
+ */
+
+/*
+ * These Hyper-V registers provide information equivalent to the CPUID
+ * instruction on x86/x64.
+ */
+#define HV_REGISTER_HYPERVISOR_VERSION 0x00000100 /*CPUID 0x40000002 */
+#define HV_REGISTER_FEATURES 0x00000200 /*CPUID 0x40000003 */
+#define HV_REGISTER_ENLIGHTENMENTS 0x00000201 /*CPUID 0x40000004 */
+
+/*
+ * Group C Features. See the asm-generic version of hyperv-tlfs.h
+ * for a description of Feature Groups.
+ */
+
+/* Crash MSRs available */
+#define HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE BIT(8)
+
+/* STIMER direct mode is available */
+#define HV_STIMER_DIRECT_MODE_AVAILABLE BIT(13)
+
+/*
+ * Synthetic register definitions equivalent to MSRs on x86/x64
+ */
+#define HV_REGISTER_CRASH_P0 0x00000210
+#define HV_REGISTER_CRASH_P1 0x00000211
+#define HV_REGISTER_CRASH_P2 0x00000212
+#define HV_REGISTER_CRASH_P3 0x00000213
+#define HV_REGISTER_CRASH_P4 0x00000214
+#define HV_REGISTER_CRASH_CTL 0x00000215
+
+#define HV_REGISTER_GUEST_OSID 0x00090002
+#define HV_REGISTER_VPINDEX 0x00090003
+#define HV_REGISTER_TIME_REFCOUNT 0x00090004
+#define HV_REGISTER_REFERENCE_TSC 0x00090017
+
+#define HV_REGISTER_SINT0 0x000A0000
+#define HV_REGISTER_SCONTROL 0x000A0010
+#define HV_REGISTER_SIFP 0x000A0012
+#define HV_REGISTER_SIPP 0x000A0013
+#define HV_REGISTER_EOM 0x000A0014
+
+#define HV_REGISTER_STIMER0_CONFIG 0x000B0000
+#define HV_REGISTER_STIMER0_COUNT 0x000B0001
+
+/*
+ * Define hypervisor message types. These must be
+ * included in the architecture specific hyperv-tlfs.h
+ * because there are processor specific values on the
+ * x86 side.
+ */
+enum hv_message_type {
+ HVMSG_NONE = 0x00000000,
+
+ /* Memory access messages. */
+ HVMSG_UNMAPPED_GPA = 0x80000000,
+ HVMSG_GPA_INTERCEPT = 0x80000001,
+
+ /* Timer notification messages. */
+ HVMSG_TIMER_EXPIRED = 0x80000010,
+
+ /* Error messages. */
+ HVMSG_INVALID_VP_REGISTER_VALUE = 0x80000020,
+ HVMSG_UNRECOVERABLE_EXCEPTION = 0x80000021,
+ HVMSG_UNSUPPORTED_FEATURE = 0x80000022,
+
+ /* Trace buffer complete messages. */
+ HVMSG_EVENTLOG_BUFFERCOMPLETE = 0x80000040,
+};
+
+#include <asm-generic/hyperv-tlfs.h>
+
+#endif
diff --git a/arch/arm64/include/asm/mshyperv.h b/arch/arm64/include/asm/mshyperv.h
new file mode 100644
index 0000000..6b1f26c
--- /dev/null
+++ b/arch/arm64/include/asm/mshyperv.h
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+
+/*
+ * Linux-specific definitions for managing interactions with Microsoft's
+ * Hyper-V hypervisor. The definitions in this file are specific to
+ * the ARM64 architecture. See include/asm-generic/mshyperv.h for
+ * definitions are that architecture independent.
+ *
+ * Definitions that are specified in the Hyper-V Top Level Functional
+ * Spec (TLFS) should not go in this file, but should instead go in
+ * hyperv-tlfs.h.
+ *
+ * Copyright (C) 2019, Microsoft, Inc.
+ *
+ * Author : Michael Kelley <mikelley@microsoft.com>
+ */
+
+#ifndef _ASM_MSHYPERV_H
+#define _ASM_MSHYPERV_H
+
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/clocksource.h>
+#include <linux/irq.h>
+#include <linux/irqdesc.h>
+#include <linux/arm-smccc.h>
+#include <asm/hyperv-tlfs.h>
+
+/* Access various Hyper-V synthetic registers */
+static inline void hv_set_simp(u64 val)
+{
+ hv_set_vpreg(HV_REGISTER_SIPP, val);
+}
+
+#define hv_get_simp(val) (val = hv_get_vpreg(HV_REGISTER_SIPP))
+
+static inline void hv_set_siefp(u64 val)
+{
+ hv_set_vpreg(HV_REGISTER_SIFP, val);
+}
+
+#define hv_get_siefp(val) (val = hv_get_vpreg(HV_REGISTER_SIFP))
+
+static inline void hv_set_synic_state(u64 val)
+{
+ hv_set_vpreg(HV_REGISTER_SCONTROL, val);
+}
+
+#define hv_get_synic_state(val) (val = hv_get_vpreg(HV_REGISTER_SCONTROL))
+
+static inline bool hv_recommend_using_aeoi(void)
+{
+ return false;
+}
+
+static inline void hv_signal_eom(void)
+{
+ hv_set_vpreg(HV_REGISTER_EOM, 0);
+}
+
+/*
+ * Hyper-V SINT registers are numbered sequentially, so we can just
+ * add the SINT number to the register number of SINT0
+ */
+
+static inline void hv_set_synint_state(u32 sint_num, u64 val)
+{
+ hv_set_vpreg(HV_REGISTER_SINT0 + sint_num, val);
+}
+
+#define hv_get_synint_state(sint_num, val) \
+ (val = hv_get_vpreg(HV_REGISTER_SINT0 + sint_num))
+
+#include <asm-generic/mshyperv.h>
+
+#endif
--
1.8.3.1
next prev parent reply other threads:[~2020-08-24 16:54 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-24 16:46 [PATCH v7 00/10] Enable Linux guests on Hyper-V on ARM64 Michael Kelley
2020-08-24 16:46 ` [PATCH v7 01/10] arm/arm64: smccc-1.1: Add vendor specific owner definition Michael Kelley
2020-08-24 16:46 ` Michael Kelley [this message]
2020-08-24 18:38 ` [PATCH v7 02/10] arm64: hyperv: Add core Hyper-V include files Arnd Bergmann
2020-08-24 16:46 ` [PATCH v7 03/10] arm64: hyperv: Add hypercall and register access functions Michael Kelley
2020-08-24 16:46 ` [PATCH v7 04/10] arm64: hyperv: Add memory alloc/free functions for Hyper-V size pages Michael Kelley
2020-08-24 16:46 ` [PATCH v7 05/10] arm64: hyperv: Add interrupt handlers for VMbus and stimer Michael Kelley
2020-08-24 18:54 ` Arnd Bergmann
2020-08-25 22:04 ` Michael Kelley
2020-08-26 7:14 ` Arnd Bergmann
2020-08-24 16:46 ` [PATCH v7 06/10] arm64: hyperv: Add kexec and panic handlers Michael Kelley
2020-08-24 16:46 ` [PATCH v7 07/10] arm64: hyperv: Initialize hypervisor on boot Michael Kelley
2020-08-24 18:33 ` Arnd Bergmann
2020-08-25 21:20 ` Michael Kelley
2020-08-26 7:18 ` Arnd Bergmann
2020-08-24 16:46 ` [PATCH v7 08/10] Drivers: hv: vmbus: Add hooks for per-CPU IRQ Michael Kelley
2020-08-24 16:46 ` [PATCH v7 09/10] arm64: efi: Export screen_info Michael Kelley
2020-08-24 17:21 ` Ard Biesheuvel
2020-08-24 17:35 ` Greg KH
2020-08-24 17:40 ` Michael Kelley
2020-08-24 17:52 ` Greg KH
2020-08-24 16:46 ` [PATCH v7 10/10] Drivers: hv: Enable Hyper-V code to be built on ARM64 Michael Kelley
2020-08-24 17:24 ` Ard Biesheuvel
2020-08-24 17:28 ` Michael Kelley
2020-08-25 8:47 ` Ben Dooks
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