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[Qemu-devel] [PATCH 1/12] kvm/x86: move Hyper-V MSR's/hypercall code int


From: Denis V. Lunev
Subject: [Qemu-devel] [PATCH 1/12] kvm/x86: move Hyper-V MSR's/hypercall code into hyperv.c file
Date: Fri, 3 Jul 2015 15:01:34 +0300

From: Andrey Smetanin <address@hidden>

This patch introduce Hyper-V related source code file - hyperv.c and
per vm and per vcpu hyperv context structures.
All Hyper-V MSR's and hypercall code moved into hyperv.c.
All Hyper-V kvm/vcpu fields moved into appropriate hyperv context
structures. Copyrights and authors information copied from x86.c
to hyperv.c.

Signed-off-by: Andrey Smetanin <address@hidden>
Signed-off-by: Denis V. Lunev <address@hidden>
Reviewed-by: Peter Hornyack <address@hidden>
CC: Paolo Bonzini <address@hidden>
CC: Gleb Natapov <address@hidden>
---
 arch/x86/include/asm/kvm_host.h |  20 ++-
 arch/x86/kvm/Makefile           |   4 +-
 arch/x86/kvm/hyperv.c           | 307 ++++++++++++++++++++++++++++++++++++++++
 arch/x86/kvm/hyperv.h           |  32 +++++
 arch/x86/kvm/lapic.h            |   2 +-
 arch/x86/kvm/x86.c              | 265 +---------------------------------
 arch/x86/kvm/x86.h              |   5 +
 7 files changed, 366 insertions(+), 269 deletions(-)
 create mode 100644 arch/x86/kvm/hyperv.c
 create mode 100644 arch/x86/kvm/hyperv.h

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index c7fa57b..78616aa 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -358,6 +358,11 @@ struct kvm_mtrr {
        struct list_head head;
 };
 
+/* Hyper-V per vcpu emulation context */
+struct kvm_vcpu_hv {
+       u64 hv_vapic;
+};
+
 struct kvm_vcpu_arch {
        /*
         * rip and regs accesses must go through
@@ -514,8 +519,7 @@ struct kvm_vcpu_arch {
        /* used for guest single stepping over the given code position */
        unsigned long singlestep_rip;
 
-       /* fields used by HYPER-V emulation */
-       u64 hv_vapic;
+       struct kvm_vcpu_hv hyperv;
 
        cpumask_var_t wbinvd_dirty_mask;
 
@@ -586,6 +590,13 @@ struct kvm_apic_map {
        struct kvm_lapic *logical_map[16][16];
 };
 
+/* Hyper-V emulation context */
+struct kvm_hv {
+       u64 hv_guest_os_id;
+       u64 hv_hypercall;
+       u64 hv_tsc_page;
+};
+
 struct kvm_arch {
        unsigned int n_used_mmu_pages;
        unsigned int n_requested_mmu_pages;
@@ -643,10 +654,7 @@ struct kvm_arch {
        /* reads protected by irq_srcu, writes by irq_lock */
        struct hlist_head mask_notifier_list;
 
-       /* fields used by HYPER-V emulation */
-       u64 hv_guest_os_id;
-       u64 hv_hypercall;
-       u64 hv_tsc_page;
+       struct kvm_hv hyperv;
 
        #ifdef CONFIG_KVM_MMU_AUDIT
        int audit_point;
diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile
index 67d215c..a1ff508 100644
--- a/arch/x86/kvm/Makefile
+++ b/arch/x86/kvm/Makefile
@@ -12,7 +12,9 @@ kvm-y                 += $(KVM)/kvm_main.o 
$(KVM)/coalesced_mmio.o \
 kvm-$(CONFIG_KVM_ASYNC_PF)     += $(KVM)/async_pf.o
 
 kvm-y                  += x86.o mmu.o emulate.o i8259.o irq.o lapic.o \
-                          i8254.o ioapic.o irq_comm.o cpuid.o pmu.o mtrr.o
+                          i8254.o ioapic.o irq_comm.o cpuid.o pmu.o mtrr.o \
+                          hyperv.o
+
 kvm-$(CONFIG_KVM_DEVICE_ASSIGNMENT)    += assigned-dev.o iommu.o
 kvm-intel-y            += vmx.o pmu_intel.o
 kvm-amd-y              += svm.o pmu_amd.o
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
new file mode 100644
index 0000000..2b49f10
--- /dev/null
+++ b/arch/x86/kvm/hyperv.c
@@ -0,0 +1,307 @@
+/*
+ * KVM Microsoft Hyper-V emulation
+ *
+ * derived from arch/x86/kvm/x86.c
+ *
+ * Copyright (C) 2006 Qumranet, Inc.
+ * Copyright (C) 2008 Qumranet, Inc.
+ * Copyright IBM Corporation, 2008
+ * Copyright 2010 Red Hat, Inc. and/or its affiliates.
+ * Copyright (C) 2015 Andrey Smetanin <address@hidden>
+ *
+ * Authors:
+ *   Avi Kivity   <address@hidden>
+ *   Yaniv Kamay  <address@hidden>
+ *   Amit Shah    <address@hidden>
+ *   Ben-Ami Yassour <address@hidden>
+ *   Andrey Smetanin <address@hidden>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include "x86.h"
+#include "lapic.h"
+#include "hyperv.h"
+
+#include <linux/kvm_host.h>
+#include <trace/events/kvm.h>
+
+#include "trace.h"
+
+static bool kvm_hv_msr_partition_wide(u32 msr)
+{
+       bool r = false;
+
+       switch (msr) {
+       case HV_X64_MSR_GUEST_OS_ID:
+       case HV_X64_MSR_HYPERCALL:
+       case HV_X64_MSR_REFERENCE_TSC:
+       case HV_X64_MSR_TIME_REF_COUNT:
+               r = true;
+               break;
+       }
+
+       return r;
+}
+
+static int kvm_hv_set_msr_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data)
+{
+       struct kvm *kvm = vcpu->kvm;
+       struct kvm_hv *hv = &kvm->arch.hyperv;
+
+       switch (msr) {
+       case HV_X64_MSR_GUEST_OS_ID:
+               hv->hv_guest_os_id = data;
+               /* setting guest os id to zero disables hypercall page */
+               if (!hv->hv_guest_os_id)
+                       hv->hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE;
+               break;
+       case HV_X64_MSR_HYPERCALL: {
+               u64 gfn;
+               unsigned long addr;
+               u8 instructions[4];
+
+               /* if guest os id is not set hypercall should remain disabled */
+               if (!hv->hv_guest_os_id)
+                       break;
+               if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) {
+                       hv->hv_hypercall = data;
+                       break;
+               }
+               gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT;
+               addr = gfn_to_hva(kvm, gfn);
+               if (kvm_is_error_hva(addr))
+                       return 1;
+               kvm_x86_ops->patch_hypercall(vcpu, instructions);
+               ((unsigned char *)instructions)[3] = 0xc3; /* ret */
+               if (__copy_to_user((void __user *)addr, instructions, 4))
+                       return 1;
+               hv->hv_hypercall = data;
+               mark_page_dirty(kvm, gfn);
+               break;
+       }
+       case HV_X64_MSR_REFERENCE_TSC: {
+               u64 gfn;
+               HV_REFERENCE_TSC_PAGE tsc_ref;
+
+               memset(&tsc_ref, 0, sizeof(tsc_ref));
+               hv->hv_tsc_page = data;
+               if (!(data & HV_X64_MSR_TSC_REFERENCE_ENABLE))
+                       break;
+               gfn = data >> HV_X64_MSR_TSC_REFERENCE_ADDRESS_SHIFT;
+               if (kvm_write_guest(
+                               kvm,
+                               gfn << HV_X64_MSR_TSC_REFERENCE_ADDRESS_SHIFT,
+                               &tsc_ref, sizeof(tsc_ref)))
+                       return 1;
+               mark_page_dirty(kvm, gfn);
+               break;
+       }
+       default:
+               vcpu_unimpl(vcpu, "Hyper-V uhandled wrmsr: 0x%x data 0x%llx\n",
+                           msr, data);
+               return 1;
+       }
+       return 0;
+}
+
+static int kvm_hv_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data)
+{
+       struct kvm_vcpu_hv *hv = &vcpu->arch.hyperv;
+
+       switch (msr) {
+       case HV_X64_MSR_APIC_ASSIST_PAGE: {
+               u64 gfn;
+               unsigned long addr;
+
+               if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) {
+                       hv->hv_vapic = data;
+                       if (kvm_lapic_enable_pv_eoi(vcpu, 0))
+                               return 1;
+                       break;
+               }
+               gfn = data >> HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT;
+               addr = kvm_vcpu_gfn_to_hva(vcpu, gfn);
+               if (kvm_is_error_hva(addr))
+                       return 1;
+               if (__clear_user((void __user *)addr, PAGE_SIZE))
+                       return 1;
+               hv->hv_vapic = data;
+               kvm_vcpu_mark_page_dirty(vcpu, gfn);
+               if (kvm_lapic_enable_pv_eoi(vcpu,
+                                           gfn_to_gpa(gfn) | KVM_MSR_ENABLED))
+                       return 1;
+               break;
+       }
+       case HV_X64_MSR_EOI:
+               return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data);
+       case HV_X64_MSR_ICR:
+               return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data);
+       case HV_X64_MSR_TPR:
+               return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data);
+       default:
+               vcpu_unimpl(vcpu, "Hyper-V uhandled wrmsr: 0x%x data 0x%llx\n",
+                           msr, data);
+               return 1;
+       }
+
+       return 0;
+}
+
+static int kvm_hv_get_msr_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
+{
+       u64 data = 0;
+       struct kvm *kvm = vcpu->kvm;
+       struct kvm_hv *hv = &kvm->arch.hyperv;
+
+       switch (msr) {
+       case HV_X64_MSR_GUEST_OS_ID:
+               data = hv->hv_guest_os_id;
+               break;
+       case HV_X64_MSR_HYPERCALL:
+               data = hv->hv_hypercall;
+               break;
+       case HV_X64_MSR_TIME_REF_COUNT: {
+               data =
+                    div_u64(get_kernel_ns() + kvm->arch.kvmclock_offset, 100);
+               break;
+       }
+       case HV_X64_MSR_REFERENCE_TSC:
+               data = hv->hv_tsc_page;
+               break;
+       default:
+               vcpu_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
+               return 1;
+       }
+
+       *pdata = data;
+       return 0;
+}
+
+static int kvm_hv_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
+{
+       u64 data = 0;
+       struct kvm_vcpu_hv *hv = &vcpu->arch.hyperv;
+
+       switch (msr) {
+       case HV_X64_MSR_VP_INDEX: {
+               int r;
+               struct kvm_vcpu *v;
+
+               kvm_for_each_vcpu(r, v, vcpu->kvm) {
+                       if (v == vcpu) {
+                               data = r;
+                               break;
+                       }
+               }
+               break;
+       }
+       case HV_X64_MSR_EOI:
+               return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata);
+       case HV_X64_MSR_ICR:
+               return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata);
+       case HV_X64_MSR_TPR:
+               return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata);
+       case HV_X64_MSR_APIC_ASSIST_PAGE:
+               data = hv->hv_vapic;
+               break;
+       default:
+               vcpu_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
+               return 1;
+       }
+       *pdata = data;
+       return 0;
+}
+
+int kvm_hv_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
+{
+       if (kvm_hv_msr_partition_wide(msr)) {
+               int r;
+
+               mutex_lock(&vcpu->kvm->lock);
+               r = kvm_hv_set_msr_pw(vcpu, msr, data);
+               mutex_unlock(&vcpu->kvm->lock);
+               return r;
+       } else
+               return kvm_hv_set_msr(vcpu, msr, data);
+}
+
+int kvm_hv_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
+{
+       if (kvm_hv_msr_partition_wide(msr)) {
+               int r;
+
+               mutex_lock(&vcpu->kvm->lock);
+               r = kvm_hv_get_msr_pw(vcpu, msr, pdata);
+               mutex_unlock(&vcpu->kvm->lock);
+               return r;
+       } else
+               return kvm_hv_get_msr(vcpu, msr, pdata);
+}
+
+bool kvm_hv_hypercall_enabled(struct kvm *kvm)
+{
+       return kvm->arch.hyperv.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE;
+}
+
+int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
+{
+       u64 param, ingpa, outgpa, ret;
+       uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0;
+       bool fast, longmode;
+
+       /*
+        * hypercall generates UD from non zero cpl and real mode
+        * per HYPER-V spec
+        */
+       if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) {
+               kvm_queue_exception(vcpu, UD_VECTOR);
+               return 0;
+       }
+
+       longmode = is_64_bit_mode(vcpu);
+
+       if (!longmode) {
+               param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) |
+                       (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff);
+               ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) |
+                       (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff);
+               outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) |
+                       (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff);
+       }
+#ifdef CONFIG_X86_64
+       else {
+               param = kvm_register_read(vcpu, VCPU_REGS_RCX);
+               ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX);
+               outgpa = kvm_register_read(vcpu, VCPU_REGS_R8);
+       }
+#endif
+
+       code = param & 0xffff;
+       fast = (param >> 16) & 0x1;
+       rep_cnt = (param >> 32) & 0xfff;
+       rep_idx = (param >> 48) & 0xfff;
+
+       trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa);
+
+       switch (code) {
+       case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT:
+               kvm_vcpu_on_spin(vcpu);
+               break;
+       default:
+               res = HV_STATUS_INVALID_HYPERCALL_CODE;
+               break;
+       }
+
+       ret = res | (((u64)rep_done & 0xfff) << 32);
+       if (longmode) {
+               kvm_register_write(vcpu, VCPU_REGS_RAX, ret);
+       } else {
+               kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32);
+               kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff);
+       }
+
+       return 1;
+}
diff --git a/arch/x86/kvm/hyperv.h b/arch/x86/kvm/hyperv.h
new file mode 100644
index 0000000..115c738
--- /dev/null
+++ b/arch/x86/kvm/hyperv.h
@@ -0,0 +1,32 @@
+/*
+ * KVM Microsoft Hyper-V emulation
+ *
+ * derived from arch/x86/kvm/x86.c
+ *
+ * Copyright (C) 2006 Qumranet, Inc.
+ * Copyright (C) 2008 Qumranet, Inc.
+ * Copyright IBM Corporation, 2008
+ * Copyright 2010 Red Hat, Inc. and/or its affiliates.
+ * Copyright (C) 2015 Andrey Smetanin <address@hidden>
+ *
+ * Authors:
+ *   Avi Kivity   <address@hidden>
+ *   Yaniv Kamay  <address@hidden>
+ *   Amit Shah    <address@hidden>
+ *   Ben-Ami Yassour <address@hidden>
+ *   Andrey Smetanin <address@hidden>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef __ARCH_X86_KVM_HYPERV_H__
+#define __ARCH_X86_KVM_HYPERV_H__
+
+int kvm_hv_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
+int kvm_hv_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata);
+bool kvm_hv_hypercall_enabled(struct kvm *kvm);
+int kvm_hv_hypercall(struct kvm_vcpu *vcpu);
+
+#endif
diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h
index f2f4e10..26f7817 100644
--- a/arch/x86/kvm/lapic.h
+++ b/arch/x86/kvm/lapic.h
@@ -90,7 +90,7 @@ int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 
*data);
 
 static inline bool kvm_hv_vapic_assist_page_enabled(struct kvm_vcpu *vcpu)
 {
-       return vcpu->arch.hv_vapic & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE;
+       return vcpu->arch.hyperv.hv_vapic & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE;
 }
 
 int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data);
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index ac165c2..301ee01 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -29,6 +29,7 @@
 #include "cpuid.h"
 #include "assigned-dev.h"
 #include "pmu.h"
+#include "hyperv.h"
 
 #include <linux/clocksource.h>
 #include <linux/interrupt.h>
@@ -1217,11 +1218,6 @@ static void kvm_get_time_scale(uint32_t scaled_khz, 
uint32_t base_khz,
                 __func__, base_khz, scaled_khz, shift, *pmultiplier);
 }
 
-static inline u64 get_kernel_ns(void)
-{
-       return ktime_get_boot_ns();
-}
-
 #ifdef CONFIG_X86_64
 static atomic_t kvm_guest_has_master_clock = ATOMIC_INIT(0);
 #endif
@@ -1869,123 +1865,6 @@ out:
        return r;
 }
 
-static bool kvm_hv_hypercall_enabled(struct kvm *kvm)
-{
-       return kvm->arch.hv_hypercall & HV_X64_MSR_HYPERCALL_ENABLE;
-}
-
-static bool kvm_hv_msr_partition_wide(u32 msr)
-{
-       bool r = false;
-       switch (msr) {
-       case HV_X64_MSR_GUEST_OS_ID:
-       case HV_X64_MSR_HYPERCALL:
-       case HV_X64_MSR_REFERENCE_TSC:
-       case HV_X64_MSR_TIME_REF_COUNT:
-               r = true;
-               break;
-       }
-
-       return r;
-}
-
-static int set_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 data)
-{
-       struct kvm *kvm = vcpu->kvm;
-
-       switch (msr) {
-       case HV_X64_MSR_GUEST_OS_ID:
-               kvm->arch.hv_guest_os_id = data;
-               /* setting guest os id to zero disables hypercall page */
-               if (!kvm->arch.hv_guest_os_id)
-                       kvm->arch.hv_hypercall &= ~HV_X64_MSR_HYPERCALL_ENABLE;
-               break;
-       case HV_X64_MSR_HYPERCALL: {
-               u64 gfn;
-               unsigned long addr;
-               u8 instructions[4];
-
-               /* if guest os id is not set hypercall should remain disabled */
-               if (!kvm->arch.hv_guest_os_id)
-                       break;
-               if (!(data & HV_X64_MSR_HYPERCALL_ENABLE)) {
-                       kvm->arch.hv_hypercall = data;
-                       break;
-               }
-               gfn = data >> HV_X64_MSR_HYPERCALL_PAGE_ADDRESS_SHIFT;
-               addr = gfn_to_hva(kvm, gfn);
-               if (kvm_is_error_hva(addr))
-                       return 1;
-               kvm_x86_ops->patch_hypercall(vcpu, instructions);
-               ((unsigned char *)instructions)[3] = 0xc3; /* ret */
-               if (__copy_to_user((void __user *)addr, instructions, 4))
-                       return 1;
-               kvm->arch.hv_hypercall = data;
-               mark_page_dirty(kvm, gfn);
-               break;
-       }
-       case HV_X64_MSR_REFERENCE_TSC: {
-               u64 gfn;
-               HV_REFERENCE_TSC_PAGE tsc_ref;
-               memset(&tsc_ref, 0, sizeof(tsc_ref));
-               kvm->arch.hv_tsc_page = data;
-               if (!(data & HV_X64_MSR_TSC_REFERENCE_ENABLE))
-                       break;
-               gfn = data >> HV_X64_MSR_TSC_REFERENCE_ADDRESS_SHIFT;
-               if (kvm_write_guest(kvm, gfn << 
HV_X64_MSR_TSC_REFERENCE_ADDRESS_SHIFT,
-                       &tsc_ref, sizeof(tsc_ref)))
-                       return 1;
-               mark_page_dirty(kvm, gfn);
-               break;
-       }
-       default:
-               vcpu_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x "
-                           "data 0x%llx\n", msr, data);
-               return 1;
-       }
-       return 0;
-}
-
-static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data)
-{
-       switch (msr) {
-       case HV_X64_MSR_APIC_ASSIST_PAGE: {
-               u64 gfn;
-               unsigned long addr;
-
-               if (!(data & HV_X64_MSR_APIC_ASSIST_PAGE_ENABLE)) {
-                       vcpu->arch.hv_vapic = data;
-                       if (kvm_lapic_enable_pv_eoi(vcpu, 0))
-                               return 1;
-                       break;
-               }
-               gfn = data >> HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT;
-               addr = kvm_vcpu_gfn_to_hva(vcpu, gfn);
-               if (kvm_is_error_hva(addr))
-                       return 1;
-               if (__clear_user((void __user *)addr, PAGE_SIZE))
-                       return 1;
-               vcpu->arch.hv_vapic = data;
-               kvm_vcpu_mark_page_dirty(vcpu, gfn);
-               if (kvm_lapic_enable_pv_eoi(vcpu, gfn_to_gpa(gfn) | 
KVM_MSR_ENABLED))
-                       return 1;
-               break;
-       }
-       case HV_X64_MSR_EOI:
-               return kvm_hv_vapic_msr_write(vcpu, APIC_EOI, data);
-       case HV_X64_MSR_ICR:
-               return kvm_hv_vapic_msr_write(vcpu, APIC_ICR, data);
-       case HV_X64_MSR_TPR:
-               return kvm_hv_vapic_msr_write(vcpu, APIC_TASKPRI, data);
-       default:
-               vcpu_unimpl(vcpu, "HYPER-V unimplemented wrmsr: 0x%x "
-                           "data 0x%llx\n", msr, data);
-               return 1;
-       }
-
-       return 0;
-}
-
 static int kvm_pv_enable_async_pf(struct kvm_vcpu *vcpu, u64 data)
 {
        gpa_t gpa = data & ~0x3f;
@@ -2224,15 +2103,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct 
msr_data *msr_info)
                 */
                break;
        case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
-               if (kvm_hv_msr_partition_wide(msr)) {
-                       int r;
-                       mutex_lock(&vcpu->kvm->lock);
-                       r = set_msr_hyperv_pw(vcpu, msr, data);
-                       mutex_unlock(&vcpu->kvm->lock);
-                       return r;
-               } else
-                       return set_msr_hyperv(vcpu, msr, data);
-               break;
+               return kvm_hv_set_msr_common(vcpu, msr, data);
        case MSR_IA32_BBL_CR_CTL3:
                /* Drop writes to this legacy MSR -- see rdmsr
                 * counterpart for further detail.
@@ -2315,68 +2186,6 @@ static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, 
u64 *pdata)
        return 0;
 }
 
-static int get_msr_hyperv_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
-{
-       u64 data = 0;
-       struct kvm *kvm = vcpu->kvm;
-
-       switch (msr) {
-       case HV_X64_MSR_GUEST_OS_ID:
-               data = kvm->arch.hv_guest_os_id;
-               break;
-       case HV_X64_MSR_HYPERCALL:
-               data = kvm->arch.hv_hypercall;
-               break;
-       case HV_X64_MSR_TIME_REF_COUNT: {
-               data =
-                    div_u64(get_kernel_ns() + kvm->arch.kvmclock_offset, 100);
-               break;
-       }
-       case HV_X64_MSR_REFERENCE_TSC:
-               data = kvm->arch.hv_tsc_page;
-               break;
-       default:
-               vcpu_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
-               return 1;
-       }
-
-       *pdata = data;
-       return 0;
-}
-
-static int get_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
-{
-       u64 data = 0;
-
-       switch (msr) {
-       case HV_X64_MSR_VP_INDEX: {
-               int r;
-               struct kvm_vcpu *v;
-               kvm_for_each_vcpu(r, v, vcpu->kvm) {
-                       if (v == vcpu) {
-                               data = r;
-                               break;
-                       }
-               }
-               break;
-       }
-       case HV_X64_MSR_EOI:
-               return kvm_hv_vapic_msr_read(vcpu, APIC_EOI, pdata);
-       case HV_X64_MSR_ICR:
-               return kvm_hv_vapic_msr_read(vcpu, APIC_ICR, pdata);
-       case HV_X64_MSR_TPR:
-               return kvm_hv_vapic_msr_read(vcpu, APIC_TASKPRI, pdata);
-       case HV_X64_MSR_APIC_ASSIST_PAGE:
-               data = vcpu->arch.hv_vapic;
-               break;
-       default:
-               vcpu_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
-               return 1;
-       }
-       *pdata = data;
-       return 0;
-}
-
 int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
 {
        u64 data;
@@ -2495,14 +2304,8 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, struct 
msr_data *msr_info)
                msr_info->data = 0x20000000;
                break;
        case HV_X64_MSR_GUEST_OS_ID ... HV_X64_MSR_SINT15:
-               if (kvm_hv_msr_partition_wide(msr_info->index)) {
-                       int r;
-                       mutex_lock(&vcpu->kvm->lock);
-                       r = get_msr_hyperv_pw(vcpu, msr_info->index, 
&msr_info->data);
-                       mutex_unlock(&vcpu->kvm->lock);
-                       return r;
-               } else
-                       return get_msr_hyperv(vcpu, msr_info->index, 
&msr_info->data);
+               return kvm_hv_get_msr_common(vcpu,
+                                            msr_info->index, &msr_info->data);
                break;
        case MSR_IA32_BBL_CR_CTL3:
                /* This legacy MSR exists but isn't fully documented in current
@@ -5885,66 +5688,6 @@ int kvm_emulate_halt(struct kvm_vcpu *vcpu)
 }
 EXPORT_SYMBOL_GPL(kvm_emulate_halt);
 
-int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
-{
-       u64 param, ingpa, outgpa, ret;
-       uint16_t code, rep_idx, rep_cnt, res = HV_STATUS_SUCCESS, rep_done = 0;
-       bool fast, longmode;
-
-       /*
-        * hypercall generates UD from non zero cpl and real mode
-        * per HYPER-V spec
-        */
-       if (kvm_x86_ops->get_cpl(vcpu) != 0 || !is_protmode(vcpu)) {
-               kvm_queue_exception(vcpu, UD_VECTOR);
-               return 0;
-       }
-
-       longmode = is_64_bit_mode(vcpu);
-
-       if (!longmode) {
-               param = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDX) << 32) |
-                       (kvm_register_read(vcpu, VCPU_REGS_RAX) & 0xffffffff);
-               ingpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RBX) << 32) |
-                       (kvm_register_read(vcpu, VCPU_REGS_RCX) & 0xffffffff);
-               outgpa = ((u64)kvm_register_read(vcpu, VCPU_REGS_RDI) << 32) |
-                       (kvm_register_read(vcpu, VCPU_REGS_RSI) & 0xffffffff);
-       }
-#ifdef CONFIG_X86_64
-       else {
-               param = kvm_register_read(vcpu, VCPU_REGS_RCX);
-               ingpa = kvm_register_read(vcpu, VCPU_REGS_RDX);
-               outgpa = kvm_register_read(vcpu, VCPU_REGS_R8);
-       }
-#endif
-
-       code = param & 0xffff;
-       fast = (param >> 16) & 0x1;
-       rep_cnt = (param >> 32) & 0xfff;
-       rep_idx = (param >> 48) & 0xfff;
-
-       trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa);
-
-       switch (code) {
-       case HV_X64_HV_NOTIFY_LONG_SPIN_WAIT:
-               kvm_vcpu_on_spin(vcpu);
-               break;
-       default:
-               res = HV_STATUS_INVALID_HYPERCALL_CODE;
-               break;
-       }
-
-       ret = res | (((u64)rep_done & 0xfff) << 32);
-       if (longmode) {
-               kvm_register_write(vcpu, VCPU_REGS_RAX, ret);
-       } else {
-               kvm_register_write(vcpu, VCPU_REGS_RDX, ret >> 32);
-               kvm_register_write(vcpu, VCPU_REGS_RAX, ret & 0xffffffff);
-       }
-
-       return 1;
-}
-
 /*
  * kvm_pv_kick_cpu_op:  Kick a vcpu.
  *
diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h
index edc8cdc..c04b56b 100644
--- a/arch/x86/kvm/x86.h
+++ b/arch/x86/kvm/x86.h
@@ -147,6 +147,11 @@ static inline void kvm_register_writel(struct kvm_vcpu 
*vcpu,
        return kvm_register_write(vcpu, reg, val);
 }
 
+static inline u64 get_kernel_ns(void)
+{
+       return ktime_get_boot_ns();
+}
+
 void kvm_before_handle_nmi(struct kvm_vcpu *vcpu);
 void kvm_after_handle_nmi(struct kvm_vcpu *vcpu);
 void kvm_set_pending_timer(struct kvm_vcpu *vcpu);
-- 
2.1.4




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