[PATCH v3 10/19] drivers/hv: get and set vcpu registers ioctls

From: Nuno Das Neves
Date: Tue Sep 28 2021 - 14:33:34 EST

Add ioctls for getting and setting virtual processor registers.

Co-developed-by: Lillian Grassin-Drake <ligrassi@xxxxxxxxxxxxx>
Signed-off-by: Lillian Grassin-Drake <ligrassi@xxxxxxxxxxxxx>
Signed-off-by: Nuno Das Neves <nunodasneves@xxxxxxxxxxxxxxxxxxx>
---
Documentation/virt/mshv/api.rst | 11 +
arch/x86/include/uapi/asm/hyperv-tlfs.h | 602 ++++++++++++++++++++++++
drivers/hv/hv_call.c | 100 ++++
drivers/hv/mshv.h | 15 +
drivers/hv/mshv_main.c | 96 +++-
include/asm-generic/hyperv-tlfs.h | 47 +-
include/linux/mshv.h | 1 +
include/uapi/asm-generic/hyperv-tlfs.h | 7 +
include/uapi/linux/mshv.h | 11 +
9 files changed, 859 insertions(+), 31 deletions(-)

diff --git a/Documentation/virt/mshv/api.rst b/Documentation/virt/mshv/api.rst
index 2538756bc86b..f0631236c063 100644
--- a/Documentation/virt/mshv/api.rst
+++ b/Documentation/virt/mshv/api.rst
@@ -96,3 +96,14 @@ by real physical memory.
Create a virtual processor in a guest partition, returning a file descriptor to
represent the vp and perform ioctls on.

+3.5 MSHV_GET_VP_REGISTERS and MSHV_SET_VP_REGISTERS
+---------------------------------------------------
+:Type: vp ioctl
+:Parameters: struct mshv_vp_registers
+:Returns: 0 on success
+
+Get/set vp registers. See asm/hyperv-tlfs.h for the complete set of registers.
+Includes general purpose platform registers, MSRs, and virtual registers that
+are part of Microsoft Hypervisor platform and not directly exposed to the guest.
+
+
diff --git a/arch/x86/include/uapi/asm/hyperv-tlfs.h b/arch/x86/include/uapi/asm/hyperv-tlfs.h
index 8a5fc59bb33a..a42c63001055 100644
--- a/arch/x86/include/uapi/asm/hyperv-tlfs.h
+++ b/arch/x86/include/uapi/asm/hyperv-tlfs.h
@@ -121,4 +121,606 @@ struct hv_partition_creation_properties {
disabled_processor_xsave_features;
} __packed;

+enum hv_register_name {
+ /* Suspend Registers */
+ HV_REGISTER_EXPLICIT_SUSPEND = 0x00000000,
+ HV_REGISTER_INTERCEPT_SUSPEND = 0x00000001,
+ HV_REGISTER_INSTRUCTION_EMULATION_HINTS = 0x00000002,
+ HV_REGISTER_DISPATCH_SUSPEND = 0x00000003,
+ HV_REGISTER_INTERNAL_ACTIVITY_STATE = 0x00000004,
+
+ /* Version */
+ HV_REGISTER_HYPERVISOR_VERSION = 0x00000100, /* 128-bit result same as CPUID 0x40000002 */
+
+ /* Feature Access (registers are 128 bits) - same as CPUID 0x40000003 - 0x4000000B */
+ HV_REGISTER_PRIVILEGES_AND_FEATURES_INFO = 0x00000200,
+ HV_REGISTER_FEATURES_INFO = 0x00000201,
+ HV_REGISTER_IMPLEMENTATION_LIMITS_INFO = 0x00000202,
+ HV_REGISTER_HARDWARE_FEATURES_INFO = 0x00000203,
+ HV_REGISTER_CPU_MANAGEMENT_FEATURES_INFO = 0x00000204,
+ HV_REGISTER_SVM_FEATURES_INFO = 0x00000205,
+ HV_REGISTER_SKIP_LEVEL_FEATURES_INFO = 0x00000206,
+ HV_REGISTER_NESTED_VIRT_FEATURES_INFO = 0x00000207,
+ HV_REGISTER_IPT_FEATURES_INFO = 0x00000208,
+
+ /* Guest Crash Registers */
+ HV_REGISTER_GUEST_CRASH_P0 = 0x00000210,
+ HV_REGISTER_GUEST_CRASH_P1 = 0x00000211,
+ HV_REGISTER_GUEST_CRASH_P2 = 0x00000212,
+ HV_REGISTER_GUEST_CRASH_P3 = 0x00000213,
+ HV_REGISTER_GUEST_CRASH_P4 = 0x00000214,
+ HV_REGISTER_GUEST_CRASH_CTL = 0x00000215,
+
+ /* Power State Configuration */
+ HV_REGISTER_POWER_STATE_CONFIG_C1 = 0x00000220,
+ HV_REGISTER_POWER_STATE_TRIGGER_C1 = 0x00000221,
+ HV_REGISTER_POWER_STATE_CONFIG_C2 = 0x00000222,
+ HV_REGISTER_POWER_STATE_TRIGGER_C2 = 0x00000223,
+ HV_REGISTER_POWER_STATE_CONFIG_C3 = 0x00000224,
+ HV_REGISTER_POWER_STATE_TRIGGER_C3 = 0x00000225,
+
+ /* Frequency Registers */
+ HV_REGISTER_PROCESSOR_CLOCK_FREQUENCY = 0x00000240,
+ HV_REGISTER_INTERRUPT_CLOCK_FREQUENCY = 0x00000241,
+
+ /* Idle Register */
+ HV_REGISTER_GUEST_IDLE = 0x00000250,
+
+ /* Guest Debug */
+ HV_REGISTER_DEBUG_DEVICE_OPTIONS = 0x00000260,
+
+ /* Memory Zeroing Conrol Register */
+ HV_REGISTER_MEMORY_ZEROING_CONTROL = 0x00000270,
+
+ /* Pending Event Register */
+ HV_REGISTER_PENDING_EVENT0 = 0x00010004,
+ HV_REGISTER_PENDING_EVENT1 = 0x00010005,
+
+ /* Misc */
+ HV_REGISTER_VP_RUNTIME = 0x00090000,
+ HV_REGISTER_GUEST_OS_ID = 0x00090002,
+ HV_REGISTER_VP_INDEX = 0x00090003,
+ HV_REGISTER_TIME_REF_COUNT = 0x00090004,
+ HV_REGISTER_CPU_MANAGEMENT_VERSION = 0x00090007,
+ HV_REGISTER_VP_ASSIST_PAGE = 0x00090013,
+ HV_REGISTER_VP_ROOT_SIGNAL_COUNT = 0x00090014,
+ HV_REGISTER_REFERENCE_TSC = 0x00090017,
+
+ /* Performance statistics Registers */
+ HV_REGISTER_STATS_PARTITION_RETAIL = 0x00090020,
+ HV_REGISTER_STATS_PARTITION_INTERNAL = 0x00090021,
+ HV_REGISTER_STATS_VP_RETAIL = 0x00090022,
+ HV_REGISTER_STATS_VP_INTERNAL = 0x00090023,
+
+ HV_REGISTER_NESTED_VP_INDEX = 0x00091003,
+
+ /* Hypervisor-defined Registers (Synic) */
+ HV_REGISTER_SINT0 = 0x000A0000,
+ HV_REGISTER_SINT1 = 0x000A0001,
+ HV_REGISTER_SINT2 = 0x000A0002,
+ HV_REGISTER_SINT3 = 0x000A0003,
+ HV_REGISTER_SINT4 = 0x000A0004,
+ HV_REGISTER_SINT5 = 0x000A0005,
+ HV_REGISTER_SINT6 = 0x000A0006,
+ HV_REGISTER_SINT7 = 0x000A0007,
+ HV_REGISTER_SINT8 = 0x000A0008,
+ HV_REGISTER_SINT9 = 0x000A0009,
+ HV_REGISTER_SINT10 = 0x000A000A,
+ HV_REGISTER_SINT11 = 0x000A000B,
+ HV_REGISTER_SINT12 = 0x000A000C,
+ HV_REGISTER_SINT13 = 0x000A000D,
+ HV_REGISTER_SINT14 = 0x000A000E,
+ HV_REGISTER_SINT15 = 0x000A000F,
+ HV_REGISTER_SCONTROL = 0x000A0010,
+ HV_REGISTER_SVERSION = 0x000A0011,
+ HV_REGISTER_SIFP = 0x000A0012,
+ HV_REGISTER_SIPP = 0x000A0013,
+ HV_REGISTER_EOM = 0x000A0014,
+ HV_REGISTER_SIRBP = 0x000A0015,
+
+ HV_REGISTER_NESTED_SINT0 = 0x000A1000,
+ HV_REGISTER_NESTED_SINT1 = 0x000A1001,
+ HV_REGISTER_NESTED_SINT2 = 0x000A1002,
+ HV_REGISTER_NESTED_SINT3 = 0x000A1003,
+ HV_REGISTER_NESTED_SINT4 = 0x000A1004,
+ HV_REGISTER_NESTED_SINT5 = 0x000A1005,
+ HV_REGISTER_NESTED_SINT6 = 0x000A1006,
+ HV_REGISTER_NESTED_SINT7 = 0x000A1007,
+ HV_REGISTER_NESTED_SINT8 = 0x000A1008,
+ HV_REGISTER_NESTED_SINT9 = 0x000A1009,
+ HV_REGISTER_NESTED_SINT10 = 0x000A100A,
+ HV_REGISTER_NESTED_SINT11 = 0x000A100B,
+ HV_REGISTER_NESTED_SINT12 = 0x000A100C,
+ HV_REGISTER_NESTED_SINT13 = 0x000A100D,
+ HV_REGISTER_NESTED_SINT14 = 0x000A100E,
+ HV_REGISTER_NESTED_SINT15 = 0x000A100F,
+ HV_REGISTER_NESTED_SCONTROL = 0x000A1010,
+ HV_REGISTER_NESTED_SVERSION = 0x000A1011,
+ HV_REGISTER_NESTED_SIFP = 0x000A1012,
+ HV_REGISTER_NESTED_SIPP = 0x000A1013,
+ HV_REGISTER_NESTED_EOM = 0x000A1014,
+ HV_REGISTER_NESTED_SIRBP = 0x000a1015,
+
+
+ /* Hypervisor-defined Registers (Synthetic Timers) */
+ HV_REGISTER_STIMER0_CONFIG = 0x000B0000,
+ HV_REGISTER_STIMER0_COUNT = 0x000B0001,
+ HV_REGISTER_STIMER1_CONFIG = 0x000B0002,
+ HV_REGISTER_STIMER1_COUNT = 0x000B0003,
+ HV_REGISTER_STIMER2_CONFIG = 0x000B0004,
+ HV_REGISTER_STIMER2_COUNT = 0x000B0005,
+ HV_REGISTER_STIMER3_CONFIG = 0x000B0006,
+ HV_REGISTER_STIMER3_COUNT = 0x000B0007,
+ HV_REGISTER_STIME_UNHALTED_TIMER_CONFIG = 0x000B0100,
+ HV_REGISTER_STIME_UNHALTED_TIMER_COUNT = 0x000b0101,
+
+ /* Synthetic VSM registers */
+
+ /* 0x000D0000-1 are available for future use. */
+ HV_REGISTER_VSM_CODE_PAGE_OFFSETS = 0x000D0002,
+ HV_REGISTER_VSM_VP_STATUS = 0x000D0003,
+ HV_REGISTER_VSM_PARTITION_STATUS = 0x000D0004,
+ HV_REGISTER_VSM_VINA = 0x000D0005,
+ HV_REGISTER_VSM_CAPABILITIES = 0x000D0006,
+ HV_REGISTER_VSM_PARTITION_CONFIG = 0x000D0007,
+
+ HV_REGISTER_VSM_VP_SECURE_CONFIG_VTL0 = 0x000D0010,
+ HV_REGISTER_VSM_VP_SECURE_CONFIG_VTL1 = 0x000D0011,
+ HV_REGISTER_VSM_VP_SECURE_CONFIG_VTL2 = 0x000D0012,
+ HV_REGISTER_VSM_VP_SECURE_CONFIG_VTL3 = 0x000D0013,
+ HV_REGISTER_VSM_VP_SECURE_CONFIG_VTL4 = 0x000D0014,
+ HV_REGISTER_VSM_VP_SECURE_CONFIG_VTL5 = 0x000D0015,
+ HV_REGISTER_VSM_VP_SECURE_CONFIG_VTL6 = 0x000D0016,
+ HV_REGISTER_VSM_VP_SECURE_CONFIG_VTL7 = 0x000D0017,
+ HV_REGISTER_VSM_VP_SECURE_CONFIG_VTL8 = 0x000D0018,
+ HV_REGISTER_VSM_VP_SECURE_CONFIG_VTL9 = 0x000D0019,
+ HV_REGISTER_VSM_VP_SECURE_CONFIG_VTL10 = 0x000D001A,
+ HV_REGISTER_VSM_VP_SECURE_CONFIG_VTL11 = 0x000D001B,
+ HV_REGISTER_VSM_VP_SECURE_CONFIG_VTL12 = 0x000D001C,
+ HV_REGISTER_VSM_VP_SECURE_CONFIG_VTL13 = 0x000D001D,
+ HV_REGISTER_VSM_VP_SECURE_CONFIG_VTL14 = 0x000D001E,
+
+ HV_REGISTER_VSM_VP_WAIT_FOR_TLB_LOCK = 0x000D0020,
+
+ HV_REGISTER_ISOLATION_CAPABILITIES = 0x000D0100,
+
+ /* Pending Interruption Register */
+ HV_REGISTER_PENDING_INTERRUPTION = 0x00010002,
+
+ /* Interrupt State register */
+ HV_REGISTER_INTERRUPT_STATE = 0x00010003,
+
+ /* Interruptible notification register */
+ HV_X64_REGISTER_DELIVERABILITY_NOTIFICATIONS = 0x00010006,
+
+ /* X64 User-Mode Registers */
+ HV_X64_REGISTER_RAX = 0x00020000,
+ HV_X64_REGISTER_RCX = 0x00020001,
+ HV_X64_REGISTER_RDX = 0x00020002,
+ HV_X64_REGISTER_RBX = 0x00020003,
+ HV_X64_REGISTER_RSP = 0x00020004,
+ HV_X64_REGISTER_RBP = 0x00020005,
+ HV_X64_REGISTER_RSI = 0x00020006,
+ HV_X64_REGISTER_RDI = 0x00020007,
+ HV_X64_REGISTER_R8 = 0x00020008,
+ HV_X64_REGISTER_R9 = 0x00020009,
+ HV_X64_REGISTER_R10 = 0x0002000A,
+ HV_X64_REGISTER_R11 = 0x0002000B,
+ HV_X64_REGISTER_R12 = 0x0002000C,
+ HV_X64_REGISTER_R13 = 0x0002000D,
+ HV_X64_REGISTER_R14 = 0x0002000E,
+ HV_X64_REGISTER_R15 = 0x0002000F,
+ HV_X64_REGISTER_RIP = 0x00020010,
+ HV_X64_REGISTER_RFLAGS = 0x00020011,
+
+ /* X64 Floating Point and Vector Registers */
+ HV_X64_REGISTER_XMM0 = 0x00030000,
+ HV_X64_REGISTER_XMM1 = 0x00030001,
+ HV_X64_REGISTER_XMM2 = 0x00030002,
+ HV_X64_REGISTER_XMM3 = 0x00030003,
+ HV_X64_REGISTER_XMM4 = 0x00030004,
+ HV_X64_REGISTER_XMM5 = 0x00030005,
+ HV_X64_REGISTER_XMM6 = 0x00030006,
+ HV_X64_REGISTER_XMM7 = 0x00030007,
+ HV_X64_REGISTER_XMM8 = 0x00030008,
+ HV_X64_REGISTER_XMM9 = 0x00030009,
+ HV_X64_REGISTER_XMM10 = 0x0003000A,
+ HV_X64_REGISTER_XMM11 = 0x0003000B,
+ HV_X64_REGISTER_XMM12 = 0x0003000C,
+ HV_X64_REGISTER_XMM13 = 0x0003000D,
+ HV_X64_REGISTER_XMM14 = 0x0003000E,
+ HV_X64_REGISTER_XMM15 = 0x0003000F,
+ HV_X64_REGISTER_FP_MMX0 = 0x00030010,
+ HV_X64_REGISTER_FP_MMX1 = 0x00030011,
+ HV_X64_REGISTER_FP_MMX2 = 0x00030012,
+ HV_X64_REGISTER_FP_MMX3 = 0x00030013,
+ HV_X64_REGISTER_FP_MMX4 = 0x00030014,
+ HV_X64_REGISTER_FP_MMX5 = 0x00030015,
+ HV_X64_REGISTER_FP_MMX6 = 0x00030016,
+ HV_X64_REGISTER_FP_MMX7 = 0x00030017,
+ HV_X64_REGISTER_FP_CONTROL_STATUS = 0x00030018,
+ HV_X64_REGISTER_XMM_CONTROL_STATUS = 0x00030019,
+
+ /* X64 Control Registers */
+ HV_X64_REGISTER_CR0 = 0x00040000,
+ HV_X64_REGISTER_CR2 = 0x00040001,
+ HV_X64_REGISTER_CR3 = 0x00040002,
+ HV_X64_REGISTER_CR4 = 0x00040003,
+ HV_X64_REGISTER_CR8 = 0x00040004,
+ HV_X64_REGISTER_XFEM = 0x00040005,
+
+ /* X64 Intermediate Control Registers */
+ HV_X64_REGISTER_INTERMEDIATE_CR0 = 0x00041000,
+ HV_X64_REGISTER_INTERMEDIATE_CR4 = 0x00041003,
+ HV_X64_REGISTER_INTERMEDIATE_CR8 = 0x00041004,
+
+ /* X64 Debug Registers */
+ HV_X64_REGISTER_DR0 = 0x00050000,
+ HV_X64_REGISTER_DR1 = 0x00050001,
+ HV_X64_REGISTER_DR2 = 0x00050002,
+ HV_X64_REGISTER_DR3 = 0x00050003,
+ HV_X64_REGISTER_DR6 = 0x00050004,
+ HV_X64_REGISTER_DR7 = 0x00050005,
+
+ /* X64 Segment Registers */
+ HV_X64_REGISTER_ES = 0x00060000,
+ HV_X64_REGISTER_CS = 0x00060001,
+ HV_X64_REGISTER_SS = 0x00060002,
+ HV_X64_REGISTER_DS = 0x00060003,
+ HV_X64_REGISTER_FS = 0x00060004,
+ HV_X64_REGISTER_GS = 0x00060005,
+ HV_X64_REGISTER_LDTR = 0x00060006,
+ HV_X64_REGISTER_TR = 0x00060007,
+
+ /* X64 Table Registers */
+ HV_X64_REGISTER_IDTR = 0x00070000,
+ HV_X64_REGISTER_GDTR = 0x00070001,
+
+ /* X64 Virtualized MSRs */
+ HV_X64_REGISTER_TSC = 0x00080000,
+ HV_X64_REGISTER_EFER = 0x00080001,
+ HV_X64_REGISTER_KERNEL_GS_BASE = 0x00080002,
+ HV_X64_REGISTER_APIC_BASE = 0x00080003,
+ HV_X64_REGISTER_PAT = 0x00080004,
+ HV_X64_REGISTER_SYSENTER_CS = 0x00080005,
+ HV_X64_REGISTER_SYSENTER_EIP = 0x00080006,
+ HV_X64_REGISTER_SYSENTER_ESP = 0x00080007,
+ HV_X64_REGISTER_STAR = 0x00080008,
+ HV_X64_REGISTER_LSTAR = 0x00080009,
+ HV_X64_REGISTER_CSTAR = 0x0008000A,
+ HV_X64_REGISTER_SFMASK = 0x0008000B,
+ HV_X64_REGISTER_INITIAL_APIC_ID = 0x0008000C,
+
+ /* X64 Cache control MSRs */
+ HV_X64_REGISTER_MSR_MTRR_CAP = 0x0008000D,
+ HV_X64_REGISTER_MSR_MTRR_DEF_TYPE = 0x0008000E,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_BASE0 = 0x00080010,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_BASE1 = 0x00080011,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_BASE2 = 0x00080012,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_BASE3 = 0x00080013,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_BASE4 = 0x00080014,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_BASE5 = 0x00080015,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_BASE6 = 0x00080016,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_BASE7 = 0x00080017,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_BASE8 = 0x00080018,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_BASE9 = 0x00080019,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_BASEA = 0x0008001A,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_BASEB = 0x0008001B,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_BASEC = 0x0008001C,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_BASED = 0x0008001D,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_BASEE = 0x0008001E,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_BASEF = 0x0008001F,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_MASK0 = 0x00080040,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_MASK1 = 0x00080041,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_MASK2 = 0x00080042,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_MASK3 = 0x00080043,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_MASK4 = 0x00080044,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_MASK5 = 0x00080045,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_MASK6 = 0x00080046,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_MASK7 = 0x00080047,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_MASK8 = 0x00080048,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_MASK9 = 0x00080049,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_MASKA = 0x0008004A,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_MASKB = 0x0008004B,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_MASKC = 0x0008004C,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_MASKD = 0x0008004D,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_MASKE = 0x0008004E,
+ HV_X64_REGISTER_MSR_MTRR_PHYS_MASKF = 0x0008004F,
+ HV_X64_REGISTER_MSR_MTRR_FIX64K00000 = 0x00080070,
+ HV_X64_REGISTER_MSR_MTRR_FIX16K80000 = 0x00080071,
+ HV_X64_REGISTER_MSR_MTRR_FIX16KA0000 = 0x00080072,
+ HV_X64_REGISTER_MSR_MTRR_FIX4KC0000 = 0x00080073,
+ HV_X64_REGISTER_MSR_MTRR_FIX4KC8000 = 0x00080074,
+ HV_X64_REGISTER_MSR_MTRR_FIX4KD0000 = 0x00080075,
+ HV_X64_REGISTER_MSR_MTRR_FIX4KD8000 = 0x00080076,
+ HV_X64_REGISTER_MSR_MTRR_FIX4KE0000 = 0x00080077,
+ HV_X64_REGISTER_MSR_MTRR_FIX4KE8000 = 0x00080078,
+ HV_X64_REGISTER_MSR_MTRR_FIX4KF0000 = 0x00080079,
+ HV_X64_REGISTER_MSR_MTRR_FIX4KF8000 = 0x0008007A,
+
+ HV_X64_REGISTER_TSC_AUX = 0x0008007B,
+ HV_X64_REGISTER_BNDCFGS = 0x0008007C,
+ HV_X64_REGISTER_DEBUG_CTL = 0x0008007D,
+
+ /* Available */
+ HV_X64_REGISTER_AVAILABLE0008007E = 0x0008007E,
+ HV_X64_REGISTER_AVAILABLE0008007F = 0x0008007F,
+
+ HV_X64_REGISTER_SGX_LAUNCH_CONTROL0 = 0x00080080,
+ HV_X64_REGISTER_SGX_LAUNCH_CONTROL1 = 0x00080081,
+ HV_X64_REGISTER_SGX_LAUNCH_CONTROL2 = 0x00080082,
+ HV_X64_REGISTER_SGX_LAUNCH_CONTROL3 = 0x00080083,
+ HV_X64_REGISTER_SPEC_CTRL = 0x00080084,
+ HV_X64_REGISTER_PRED_CMD = 0x00080085,
+ HV_X64_REGISTER_VIRT_SPEC_CTRL = 0x00080086,
+
+ /* Other MSRs */
+ HV_X64_REGISTER_MSR_IA32_MISC_ENABLE = 0x000800A0,
+ HV_X64_REGISTER_IA32_FEATURE_CONTROL = 0x000800A1,
+ HV_X64_REGISTER_IA32_VMX_BASIC = 0x000800A2,
+ HV_X64_REGISTER_IA32_VMX_PINBASED_CTLS = 0x000800A3,
+ HV_X64_REGISTER_IA32_VMX_PROCBASED_CTLS = 0x000800A4,
+ HV_X64_REGISTER_IA32_VMX_EXIT_CTLS = 0x000800A5,
+ HV_X64_REGISTER_IA32_VMX_ENTRY_CTLS = 0x000800A6,
+ HV_X64_REGISTER_IA32_VMX_MISC = 0x000800A7,
+ HV_X64_REGISTER_IA32_VMX_CR0_FIXED0 = 0x000800A8,
+ HV_X64_REGISTER_IA32_VMX_CR0_FIXED1 = 0x000800A9,
+ HV_X64_REGISTER_IA32_VMX_CR4_FIXED0 = 0x000800AA,
+ HV_X64_REGISTER_IA32_VMX_CR4_FIXED1 = 0x000800AB,
+ HV_X64_REGISTER_IA32_VMX_VMCS_ENUM = 0x000800AC,
+ HV_X64_REGISTER_IA32_VMX_PROCBASED_CTLS2 = 0x000800AD,
+ HV_X64_REGISTER_IA32_VMX_EPT_VPID_CAP = 0x000800AE,
+ HV_X64_REGISTER_IA32_VMX_TRUE_PINBASED_CTLS = 0x000800AF,
+ HV_X64_REGISTER_IA32_VMX_TRUE_PROCBASED_CTLS = 0x000800B0,
+ HV_X64_REGISTER_IA32_VMX_TRUE_EXIT_CTLS = 0x000800B1,
+ HV_X64_REGISTER_IA32_VMX_TRUE_ENTRY_CTLS = 0x000800B2,
+
+ /* Performance monitoring MSRs */
+ HV_X64_REGISTER_PERF_GLOBAL_CTRL = 0x00081000,
+ HV_X64_REGISTER_PERF_GLOBAL_STATUS = 0x00081001,
+ HV_X64_REGISTER_PERF_GLOBAL_IN_USE = 0x00081002,
+ HV_X64_REGISTER_FIXED_CTR_CTRL = 0x00081003,
+ HV_X64_REGISTER_DS_AREA = 0x00081004,
+ HV_X64_REGISTER_PEBS_ENABLE = 0x00081005,
+ HV_X64_REGISTER_PEBS_LD_LAT = 0x00081006,
+ HV_X64_REGISTER_PEBS_FRONTEND = 0x00081007,
+ HV_X64_REGISTER_PERF_EVT_SEL0 = 0x00081100,
+ HV_X64_REGISTER_PMC0 = 0x00081200,
+ HV_X64_REGISTER_FIXED_CTR0 = 0x00081300,
+
+ HV_X64_REGISTER_LBR_TOS = 0x00082000,
+ HV_X64_REGISTER_LBR_SELECT = 0x00082001,
+ HV_X64_REGISTER_LER_FROM_LIP = 0x00082002,
+ HV_X64_REGISTER_LER_TO_LIP = 0x00082003,
+ HV_X64_REGISTER_LBR_FROM0 = 0x00082100,
+ HV_X64_REGISTER_LBR_TO0 = 0x00082200,
+ HV_X64_REGISTER_LBR_INFO0 = 0x00083300,
+
+ /* Intel processor trace MSRs */
+ HV_X64_REGISTER_RTIT_CTL = 0x00081008,
+ HV_X64_REGISTER_RTIT_STATUS = 0x00081009,
+ HV_X64_REGISTER_RTIT_OUTPUT_BASE = 0x0008100A,
+ HV_X64_REGISTER_RTIT_OUTPUT_MASK_PTRS = 0x0008100B,
+ HV_X64_REGISTER_RTIT_CR3_MATCH = 0x0008100C,
+ HV_X64_REGISTER_RTIT_ADDR0A = 0x00081400,
+
+ /* RtitAddr0A/B - RtitAddr3A/B occupy 0x00081400-0x00081407. */
+
+ /* X64 Apic registers. These match the equivalent x2APIC MSR offsets. */
+ HV_X64_REGISTER_APIC_ID = 0x00084802,
+ HV_X64_REGISTER_APIC_VERSION = 0x00084803,
+
+ /* Hypervisor-defined registers (Misc) */
+ HV_X64_REGISTER_HYPERCALL = 0x00090001,
+
+ /* X64 Virtual APIC registers synthetic MSRs */
+ HV_X64_REGISTER_SYNTHETIC_EOI = 0x00090010,
+ HV_X64_REGISTER_SYNTHETIC_ICR = 0x00090011,
+ HV_X64_REGISTER_SYNTHETIC_TPR = 0x00090012,
+
+ /* Partition Timer Assist Registers */
+ HV_X64_REGISTER_EMULATED_TIMER_PERIOD = 0x00090030,
+ HV_X64_REGISTER_EMULATED_TIMER_CONTROL = 0x00090031,
+ HV_X64_REGISTER_PM_TIMER_ASSIST = 0x00090032,
+
+ /* Intercept Control Registers */
+ HV_X64_REGISTER_CR_INTERCEPT_CONTROL = 0x000E0000,
+ HV_X64_REGISTER_CR_INTERCEPT_CR0_MASK = 0x000E0001,
+ HV_X64_REGISTER_CR_INTERCEPT_CR4_MASK = 0x000E0002,
+ HV_X64_REGISTER_CR_INTERCEPT_IA32_MISC_ENABLE_MASK = 0x000E0003,
+};
+
+struct hv_u128 {
+ __u64 high_part;
+ __u64 low_part;
+} __packed;
+
+union hv_x64_fp_register {
+ struct hv_u128 as_uint128;
+ struct {
+ __u64 mantissa;
+ __u64 biased_exponent : 15;
+ __u64 sign : 1;
+ __u64 reserved : 48;
+ } __packed;
+} __packed;
+
+union hv_x64_fp_control_status_register {
+ struct hv_u128 as_uint128;
+ struct {
+ __u16 fp_control;
+ __u16 fp_status;
+ __u8 fp_tag;
+ __u8 reserved;
+ __u16 last_fp_op;
+ union {
+ /* long mode */
+ __u64 last_fp_rip;
+ /* 32 bit mode */
+ struct {
+ __u32 last_fp_eip;
+ __u16 last_fp_cs;
+ __u16 padding;
+ } __packed;
+ };
+ } __packed;
+} __packed;
+
+union hv_x64_xmm_control_status_register {
+ struct hv_u128 as_uint128;
+ struct {
+ union {
+ /* long mode */
+ __u64 last_fp_rdp;
+ /* 32 bit mode */
+ struct {
+ __u32 last_fp_dp;
+ __u16 last_fp_ds;
+ __u16 padding;
+ } __packed;
+ };
+ __u32 xmm_status_control;
+ __u32 xmm_status_control_mask;
+ } __packed;
+} __packed;
+
+struct hv_x64_segment_register {
+ __u64 base;
+ __u32 limit;
+ __u16 selector;
+ union {
+ struct {
+ __u16 segment_type : 4;
+ __u16 non_system_segment : 1;
+ __u16 descriptor_privilege_level : 2;
+ __u16 present : 1;
+ __u16 reserved : 4;
+ __u16 available : 1;
+ __u16 _long : 1;
+ __u16 _default : 1;
+ __u16 granularity : 1;
+ } __packed;
+ __u16 attributes;
+ };
+} __packed;
+
+struct hv_x64_table_register {
+ __u16 pad[3];
+ __u16 limit;
+ __u64 base;
+} __packed;
+
+union hv_explicit_suspend_register {
+ __u64 as_uint64;
+ struct {
+ __u64 suspended : 1;
+ __u64 reserved : 63;
+ } __packed;
+};
+
+union hv_intercept_suspend_register {
+ __u64 as_uint64;
+ struct {
+ __u64 suspended : 1;
+ __u64 reserved : 63;
+ } __packed;
+};
+
+union hv_dispatch_suspend_register {
+ __u64 as_uint64;
+ struct {
+ __u64 suspended : 1;
+ __u64 reserved : 63;
+ } __packed;
+};
+
+union hv_x64_interrupt_state_register {
+ __u64 as_uint64;
+ struct {
+ __u64 interrupt_shadow : 1;
+ __u64 nmi_masked : 1;
+ __u64 reserved : 62;
+ } __packed;
+};
+
+union hv_x64_pending_interruption_register {
+ __u64 as_uint64;
+ struct {
+ __u32 interruption_pending : 1;
+ __u32 interruption_type : 3;
+ __u32 deliver_error_code : 1;
+ __u32 instruction_length : 4;
+ __u32 nested_event : 1;
+ __u32 reserved : 6;
+ __u32 interruption_vector : 16;
+ __u32 error_code;
+ } __packed;
+};
+
+union hv_x64_msr_npiep_config_contents {
+ __u64 as_uint64;
+ struct {
+ /*
+ * These bits enable instruction execution prevention for
+ * specific instructions.
+ */
+ __u64 prevents_gdt : 1;
+ __u64 prevents_idt : 1;
+ __u64 prevents_ldt : 1;
+ __u64 prevents_tr : 1;
+
+ /* The reserved bits must always be 0. */
+ __u64 reserved : 60;
+ } __packed;
+};
+
+union hv_x64_pending_exception_event {
+ __u64 as_uint64[2];
+ struct {
+ __u32 event_pending : 1;
+ __u32 event_type : 3;
+ __u32 reserved0 : 4;
+ __u32 deliver_error_code : 1;
+ __u32 reserved1 : 7;
+ __u32 vector : 16;
+ __u32 error_code;
+ __u64 exception_parameter;
+ } __packed;
+};
+
+union hv_x64_pending_virtualization_fault_event {
+ __u64 as_uint64[2];
+ struct {
+ __u32 event_pending : 1;
+ __u32 event_type : 3;
+ __u32 reserved0 : 4;
+ __u32 reserved1 : 8;
+ __u32 parameter0 : 16;
+ __u32 code;
+ __u64 parameter1;
+ } __packed;
+};
+
+union hv_register_value {
+ struct hv_u128 reg128;
+ __u64 reg64;
+ __u32 reg32;
+ __u16 reg16;
+ __u8 reg8;
+ union hv_x64_fp_register fp;
+ union hv_x64_fp_control_status_register fp_control_status;
+ union hv_x64_xmm_control_status_register xmm_control_status;
+ struct hv_x64_segment_register segment;
+ struct hv_x64_table_register table;
+ union hv_explicit_suspend_register explicit_suspend;
+ union hv_intercept_suspend_register intercept_suspend;
+ union hv_dispatch_suspend_register dispatch_suspend;
+ union hv_x64_interrupt_state_register interrupt_state;
+ union hv_x64_pending_interruption_register pending_interruption;
+ union hv_x64_msr_npiep_config_contents npiep_config;
+ union hv_x64_pending_exception_event pending_exception_event;
+ union hv_x64_pending_virtualization_fault_event
+ pending_virtualization_fault_event;
+};
+
#endif
diff --git a/drivers/hv/hv_call.c b/drivers/hv/hv_call.c
index 31d59de4a7f7..37dcd6c636a7 100644
--- a/drivers/hv/hv_call.c
+++ b/drivers/hv/hv_call.c
@@ -294,3 +294,103 @@ int hv_call_unmap_gpa_pages(
return ret;
}

+int hv_call_get_vp_registers(
+ u32 vp_index,
+ u64 partition_id,
+ u16 count,
+ struct hv_register_assoc *registers)
+{
+ struct hv_get_vp_registers *input_page;
+ union hv_register_value *output_page;
+ u16 completed = 0;
+ unsigned long remaining = count;
+ int rep_count, i;
+ u64 status;
+ unsigned long flags;
+
+ local_irq_save(flags);
+
+ input_page = (struct hv_get_vp_registers *)(*this_cpu_ptr(
+ hyperv_pcpu_input_arg));
+ output_page = (union hv_register_value *)(*this_cpu_ptr(
+ hyperv_pcpu_output_arg));
+
+ input_page->partition_id = partition_id;
+ input_page->vp_index = vp_index;
+ input_page->input_vtl = 0;
+ input_page->rsvd_z8 = 0;
+ input_page->rsvd_z16 = 0;
+
+ while (remaining) {
+ rep_count = min(remaining, HV_GET_REGISTER_BATCH_SIZE);
+ for (i = 0; i < rep_count; ++i)
+ input_page->names[i] = registers[i].name;
+
+ status = hv_do_rep_hypercall(HVCALL_GET_VP_REGISTERS, rep_count,
+ 0, input_page, output_page);
+ if (!hv_result_success(status)) {
+ pr_err("%s: completed %li out of %u, %s\n",
+ __func__,
+ count - remaining, count,
+ hv_status_to_string(status));
+ break;
+ }
+ completed = hv_repcomp(status);
+ for (i = 0; i < completed; ++i)
+ registers[i].value = output_page[i];
+
+ registers += completed;
+ remaining -= completed;
+ }
+ local_irq_restore(flags);
+
+ return hv_status_to_errno(status);
+}
+
+int hv_call_set_vp_registers(
+ u32 vp_index,
+ u64 partition_id,
+ u16 count,
+ struct hv_register_assoc *registers)
+{
+ struct hv_set_vp_registers *input_page;
+ u16 completed = 0;
+ unsigned long remaining = count;
+ int rep_count;
+ u64 status;
+ unsigned long flags;
+
+ local_irq_save(flags);
+ input_page = (struct hv_set_vp_registers *)(*this_cpu_ptr(
+ hyperv_pcpu_input_arg));
+
+ input_page->partition_id = partition_id;
+ input_page->vp_index = vp_index;
+ input_page->input_vtl = 0;
+ input_page->rsvd_z8 = 0;
+ input_page->rsvd_z16 = 0;
+
+ while (remaining) {
+ rep_count = min(remaining, HV_SET_REGISTER_BATCH_SIZE);
+ memcpy(input_page->elements, registers,
+ sizeof(struct hv_register_assoc) * rep_count);
+
+ status = hv_do_rep_hypercall(HVCALL_SET_VP_REGISTERS, rep_count,
+ 0, input_page, NULL);
+ if (!hv_result_success(status)) {
+ pr_err("%s: completed %li out of %u, %s\n",
+ __func__,
+ count - remaining, count,
+ hv_status_to_string(status));
+ break;
+ }
+ completed = hv_repcomp(status);
+ registers += completed;
+ remaining -= completed;
+ }
+
+ local_irq_restore(flags);
+
+ return hv_status_to_errno(status);
+}
+
diff --git a/drivers/hv/mshv.h b/drivers/hv/mshv.h
index 13d9df7c3e0d..9e63d2fabc74 100644
--- a/drivers/hv/mshv.h
+++ b/drivers/hv/mshv.h
@@ -21,6 +21,11 @@
#define HV_MAP_GPA_BATCH_SIZE \
((HV_HYP_PAGE_SIZE - sizeof(struct hv_map_gpa_pages)) / sizeof(u64))
#define PIN_PAGES_BATCH_SIZE (0x10000000 / HV_HYP_PAGE_SIZE)
+#define HV_GET_REGISTER_BATCH_SIZE \
+ (HV_HYP_PAGE_SIZE / sizeof(union hv_register_value))
+#define HV_SET_REGISTER_BATCH_SIZE \
+ ((HV_HYP_PAGE_SIZE - sizeof(struct hv_set_vp_registers)) \
+ / sizeof(struct hv_register_assoc))

/*
* Hyper-V hypercalls
@@ -43,5 +48,15 @@ int hv_call_unmap_gpa_pages(
u64 partition_id,
u64 gpa_target,
u64 page_count, u32 flags);
+int hv_call_get_vp_registers(
+ u32 vp_index,
+ u64 partition_id,
+ u16 count,
+ struct hv_register_assoc *registers);
+int hv_call_set_vp_registers(
+ u32 vp_index,
+ u64 partition_id,
+ u16 count,
+ struct hv_register_assoc *registers);

#endif /* _MSHV_H */
diff --git a/drivers/hv/mshv_main.c b/drivers/hv/mshv_main.c
index c3ac8c371d0f..f66644d0dca5 100644
--- a/drivers/hv/mshv_main.c
+++ b/drivers/hv/mshv_main.c
@@ -62,10 +62,102 @@ static struct miscdevice mshv_dev = {
.mode = 0600,
};

+static long
+mshv_vp_ioctl_get_regs(struct mshv_vp *vp, void __user *user_args)
+{
+ struct mshv_vp_registers args;
+ struct hv_register_assoc *registers;
+ long ret;
+
+ if (copy_from_user(&args, user_args, sizeof(args)))
+ return -EFAULT;
+
+ if (args.count > MSHV_VP_MAX_REGISTERS)
+ return -EINVAL;
+
+ registers = kmalloc_array(args.count,
+ sizeof(*registers),
+ GFP_KERNEL);
+ if (!registers)
+ return -ENOMEM;
+
+ if (copy_from_user(registers, args.regs,
+ sizeof(*registers) * args.count)) {
+ ret = -EFAULT;
+ goto free_return;
+ }
+
+ ret = hv_call_get_vp_registers(vp->index, vp->partition->id,
+ args.count, registers);
+ if (ret)
+ goto free_return;
+
+ if (copy_to_user(args.regs, registers,
+ sizeof(*registers) * args.count)) {
+ ret = -EFAULT;
+ }
+
+free_return:
+ kfree(registers);
+ return ret;
+}
+
+static long
+mshv_vp_ioctl_set_regs(struct mshv_vp *vp, void __user *user_args)
+{
+ struct mshv_vp_registers args;
+ struct hv_register_assoc *registers;
+ long ret;
+
+ if (copy_from_user(&args, user_args, sizeof(args)))
+ return -EFAULT;
+
+ if (args.count > MSHV_VP_MAX_REGISTERS)
+ return -EINVAL;
+
+ registers = kmalloc_array(args.count,
+ sizeof(*registers),
+ GFP_KERNEL);
+ if (!registers)
+ return -ENOMEM;
+
+ if (copy_from_user(registers, args.regs,
+ sizeof(*registers) * args.count)) {
+ ret = -EFAULT;
+ goto free_return;
+ }
+
+ ret = hv_call_set_vp_registers(vp->index, vp->partition->id,
+ args.count, registers);
+
+free_return:
+ kfree(registers);
+ return ret;
+}
+
static long
mshv_vp_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
{
- return -ENOTTY;
+ struct mshv_vp *vp = filp->private_data;
+ long r = 0;
+
+ if (mutex_lock_killable(&vp->mutex))
+ return -EINTR;
+
+ switch (ioctl) {
+ case MSHV_GET_VP_REGISTERS:
+ r = mshv_vp_ioctl_get_regs(vp, (void __user *)arg);
+ break;
+ case MSHV_SET_VP_REGISTERS:
+ r = mshv_vp_ioctl_set_regs(vp, (void __user *)arg);
+ break;
+ default:
+ r = -ENOTTY;
+ break;
+ }
+ mutex_unlock(&vp->mutex);
+
+ return r;
}

static int
@@ -102,6 +194,8 @@ mshv_partition_ioctl_create_vp(struct mshv_partition *partition,
if (!vp)
return -ENOMEM;

+ mutex_init(&vp->mutex);
+
vp->index = args.vp_index;
vp->partition = mshv_partition_get(partition);
if (!vp->partition) {
diff --git a/include/asm-generic/hyperv-tlfs.h b/include/asm-generic/hyperv-tlfs.h
index 8684e7f9ec5b..8679c39181a2 100644
--- a/include/asm-generic/hyperv-tlfs.h
+++ b/include/asm-generic/hyperv-tlfs.h
@@ -665,23 +665,17 @@ struct hv_retarget_device_interrupt {
struct hv_device_interrupt_target int_target;
} __packed __aligned(8);

-
-/* HvGetVpRegisters hypercall input with variable size reg name list*/
-struct hv_get_vp_registers_input {
- struct {
- u64 partitionid;
- u32 vpindex;
- u8 inputvtl;
- u8 padding[3];
- } header;
- struct input {
- u32 name0;
- u32 name1;
- } element[];
+/* HvGetVpRegisters hypercall with variable size reg name list*/
+struct hv_get_vp_registers {
+ u64 partition_id;
+ u32 vp_index;
+ u8 input_vtl;
+ u8 rsvd_z8;
+ u16 rsvd_z16;
+ u32 names[];
} __packed;

-
-/* HvGetVpRegisters returns an array of these output elements */
+/* HvGetVpRegisters returns an array of register values */
struct hv_get_vp_registers_output {
union {
struct {
@@ -695,23 +689,16 @@ struct hv_get_vp_registers_output {
u64 high;
} as64 __packed;
};
-};
+} __packed;

/* HvSetVpRegisters hypercall with variable size reg name/value list*/
-struct hv_set_vp_registers_input {
- struct {
- u64 partitionid;
- u32 vpindex;
- u8 inputvtl;
- u8 padding[3];
- } header;
- struct {
- u32 name;
- u32 padding1;
- u64 padding2;
- u64 valuelow;
- u64 valuehigh;
- } element[];
+struct hv_set_vp_registers {
+ u64 partition_id;
+ u32 vp_index;
+ u8 input_vtl;
+ u8 rsvd_z8;
+ u16 rsvd_z16;
+ struct hv_register_assoc elements[];
} __packed;

enum hv_device_type {
diff --git a/include/linux/mshv.h b/include/linux/mshv.h
index 50521c5f7948..dfe469f573f9 100644
--- a/include/linux/mshv.h
+++ b/include/linux/mshv.h
@@ -17,6 +17,7 @@
struct mshv_vp {
u32 index;
struct mshv_partition *partition;
+ struct mutex mutex;
};

struct mshv_mem_region {
diff --git a/include/uapi/asm-generic/hyperv-tlfs.h b/include/uapi/asm-generic/hyperv-tlfs.h
index e7b09b9f00de..f49099d1f894 100644
--- a/include/uapi/asm-generic/hyperv-tlfs.h
+++ b/include/uapi/asm-generic/hyperv-tlfs.h
@@ -21,4 +21,11 @@
#define HV_MAP_GPA_EXECUTABLE 0xC
#define HV_MAP_GPA_PERMISSIONS_MASK 0xF

+struct hv_register_assoc {
+ __u32 name; /* enum hv_register_name */
+ __u32 reserved1;
+ __u64 reserved2;
+ union hv_register_value value;
+} __packed;
+
#endif
diff --git a/include/uapi/linux/mshv.h b/include/uapi/linux/mshv.h
index 251976348441..7a4e0c340dd4 100644
--- a/include/uapi/linux/mshv.h
+++ b/include/uapi/linux/mshv.h
@@ -34,6 +34,13 @@ struct mshv_create_vp {
__u32 vp_index;
};

+#define MSHV_VP_MAX_REGISTERS 128
+
+struct mshv_vp_registers {
+ int count; /* at most MSHV_VP_MAX_REGISTERS */
+ struct hv_register_assoc *regs;
+};
+
#define MSHV_IOCTL 0xB8

/* mshv device */
@@ -45,4 +52,8 @@ struct mshv_create_vp {
#define MSHV_UNMAP_GUEST_MEMORY _IOW(MSHV_IOCTL, 0x03, struct mshv_user_mem_region)
#define MSHV_CREATE_VP _IOW(MSHV_IOCTL, 0x04, struct mshv_create_vp)

+/* vp device */
+#define MSHV_GET_VP_REGISTERS _IOWR(MSHV_IOCTL, 0x05, struct mshv_vp_registers)
+#define MSHV_SET_VP_REGISTERS _IOW(MSHV_IOCTL, 0x06, struct mshv_vp_registers)
+
#endif
--
2.23.4