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-rw-r--r--arch/x86/kvm/hyperv.c708
1 files changed, 704 insertions, 4 deletions
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 62cf8c915e95..c58ba67175ac 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -23,13 +23,665 @@
#include "x86.h"
#include "lapic.h"
+#include "ioapic.h"
#include "hyperv.h"
#include <linux/kvm_host.h>
+#include <linux/highmem.h>
+#include <asm/apicdef.h>
#include <trace/events/kvm.h>
#include "trace.h"
+static inline u64 synic_read_sint(struct kvm_vcpu_hv_synic *synic, int sint)
+{
+ return atomic64_read(&synic->sint[sint]);
+}
+
+static inline int synic_get_sint_vector(u64 sint_value)
+{
+ if (sint_value & HV_SYNIC_SINT_MASKED)
+ return -1;
+ return sint_value & HV_SYNIC_SINT_VECTOR_MASK;
+}
+
+static bool synic_has_vector_connected(struct kvm_vcpu_hv_synic *synic,
+ int vector)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(synic->sint); i++) {
+ if (synic_get_sint_vector(synic_read_sint(synic, i)) == vector)
+ return true;
+ }
+ return false;
+}
+
+static bool synic_has_vector_auto_eoi(struct kvm_vcpu_hv_synic *synic,
+ int vector)
+{
+ int i;
+ u64 sint_value;
+
+ for (i = 0; i < ARRAY_SIZE(synic->sint); i++) {
+ sint_value = synic_read_sint(synic, i);
+ if (synic_get_sint_vector(sint_value) == vector &&
+ sint_value & HV_SYNIC_SINT_AUTO_EOI)
+ return true;
+ }
+ return false;
+}
+
+static int synic_set_sint(struct kvm_vcpu_hv_synic *synic, int sint,
+ u64 data, bool host)
+{
+ int vector;
+
+ vector = data & HV_SYNIC_SINT_VECTOR_MASK;
+ if (vector < 16 && !host)
+ return 1;
+ /*
+ * Guest may configure multiple SINTs to use the same vector, so
+ * we maintain a bitmap of vectors handled by synic, and a
+ * bitmap of vectors with auto-eoi behavior. The bitmaps are
+ * updated here, and atomically queried on fast paths.
+ */
+
+ atomic64_set(&synic->sint[sint], data);
+
+ if (synic_has_vector_connected(synic, vector))
+ __set_bit(vector, synic->vec_bitmap);
+ else
+ __clear_bit(vector, synic->vec_bitmap);
+
+ if (synic_has_vector_auto_eoi(synic, vector))
+ __set_bit(vector, synic->auto_eoi_bitmap);
+ else
+ __clear_bit(vector, synic->auto_eoi_bitmap);
+
+ /* Load SynIC vectors into EOI exit bitmap */
+ kvm_make_request(KVM_REQ_SCAN_IOAPIC, synic_to_vcpu(synic));
+ return 0;
+}
+
+static struct kvm_vcpu_hv_synic *synic_get(struct kvm *kvm, u32 vcpu_id)
+{
+ struct kvm_vcpu *vcpu;
+ struct kvm_vcpu_hv_synic *synic;
+
+ if (vcpu_id >= atomic_read(&kvm->online_vcpus))
+ return NULL;
+ vcpu = kvm_get_vcpu(kvm, vcpu_id);
+ if (!vcpu)
+ return NULL;
+ synic = vcpu_to_synic(vcpu);
+ return (synic->active) ? synic : NULL;
+}
+
+static void synic_clear_sint_msg_pending(struct kvm_vcpu_hv_synic *synic,
+ u32 sint)
+{
+ struct kvm_vcpu *vcpu = synic_to_vcpu(synic);
+ struct page *page;
+ gpa_t gpa;
+ struct hv_message *msg;
+ struct hv_message_page *msg_page;
+
+ gpa = synic->msg_page & PAGE_MASK;
+ page = kvm_vcpu_gfn_to_page(vcpu, gpa >> PAGE_SHIFT);
+ if (is_error_page(page)) {
+ vcpu_err(vcpu, "Hyper-V SynIC can't get msg page, gpa 0x%llx\n",
+ gpa);
+ return;
+ }
+ msg_page = kmap_atomic(page);
+
+ msg = &msg_page->sint_message[sint];
+ msg->header.message_flags.msg_pending = 0;
+
+ kunmap_atomic(msg_page);
+ kvm_release_page_dirty(page);
+ kvm_vcpu_mark_page_dirty(vcpu, gpa >> PAGE_SHIFT);
+}
+
+static void kvm_hv_notify_acked_sint(struct kvm_vcpu *vcpu, u32 sint)
+{
+ struct kvm *kvm = vcpu->kvm;
+ struct kvm_vcpu_hv_synic *synic = vcpu_to_synic(vcpu);
+ struct kvm_vcpu_hv *hv_vcpu = vcpu_to_hv_vcpu(vcpu);
+ struct kvm_vcpu_hv_stimer *stimer;
+ int gsi, idx, stimers_pending;
+
+ trace_kvm_hv_notify_acked_sint(vcpu->vcpu_id, sint);
+
+ if (synic->msg_page & HV_SYNIC_SIMP_ENABLE)
+ synic_clear_sint_msg_pending(synic, sint);
+
+ /* Try to deliver pending Hyper-V SynIC timers messages */
+ stimers_pending = 0;
+ for (idx = 0; idx < ARRAY_SIZE(hv_vcpu->stimer); idx++) {
+ stimer = &hv_vcpu->stimer[idx];
+ if (stimer->msg_pending &&
+ (stimer->config & HV_STIMER_ENABLE) &&
+ HV_STIMER_SINT(stimer->config) == sint) {
+ set_bit(stimer->index,
+ hv_vcpu->stimer_pending_bitmap);
+ stimers_pending++;
+ }
+ }
+ if (stimers_pending)
+ kvm_make_request(KVM_REQ_HV_STIMER, vcpu);
+
+ idx = srcu_read_lock(&kvm->irq_srcu);
+ gsi = atomic_read(&synic->sint_to_gsi[sint]);
+ if (gsi != -1)
+ kvm_notify_acked_gsi(kvm, gsi);
+ srcu_read_unlock(&kvm->irq_srcu, idx);
+}
+
+static void synic_exit(struct kvm_vcpu_hv_synic *synic, u32 msr)
+{
+ struct kvm_vcpu *vcpu = synic_to_vcpu(synic);
+ struct kvm_vcpu_hv *hv_vcpu = &vcpu->arch.hyperv;
+
+ hv_vcpu->exit.type = KVM_EXIT_HYPERV_SYNIC;
+ hv_vcpu->exit.u.synic.msr = msr;
+ hv_vcpu->exit.u.synic.control = synic->control;
+ hv_vcpu->exit.u.synic.evt_page = synic->evt_page;
+ hv_vcpu->exit.u.synic.msg_page = synic->msg_page;
+
+ kvm_make_request(KVM_REQ_HV_EXIT, vcpu);
+}
+
+static int synic_set_msr(struct kvm_vcpu_hv_synic *synic,
+ u32 msr, u64 data, bool host)
+{
+ struct kvm_vcpu *vcpu = synic_to_vcpu(synic);
+ int ret;
+
+ if (!synic->active)
+ return 1;
+
+ trace_kvm_hv_synic_set_msr(vcpu->vcpu_id, msr, data, host);
+
+ ret = 0;
+ switch (msr) {
+ case HV_X64_MSR_SCONTROL:
+ synic->control = data;
+ if (!host)
+ synic_exit(synic, msr);
+ break;
+ case HV_X64_MSR_SVERSION:
+ if (!host) {
+ ret = 1;
+ break;
+ }
+ synic->version = data;
+ break;
+ case HV_X64_MSR_SIEFP:
+ if (data & HV_SYNIC_SIEFP_ENABLE)
+ if (kvm_clear_guest(vcpu->kvm,
+ data & PAGE_MASK, PAGE_SIZE)) {
+ ret = 1;
+ break;
+ }
+ synic->evt_page = data;
+ if (!host)
+ synic_exit(synic, msr);
+ break;
+ case HV_X64_MSR_SIMP:
+ if (data & HV_SYNIC_SIMP_ENABLE)
+ if (kvm_clear_guest(vcpu->kvm,
+ data & PAGE_MASK, PAGE_SIZE)) {
+ ret = 1;
+ break;
+ }
+ synic->msg_page = data;
+ if (!host)
+ synic_exit(synic, msr);
+ break;
+ case HV_X64_MSR_EOM: {
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(synic->sint); i++)
+ kvm_hv_notify_acked_sint(vcpu, i);
+ break;
+ }
+ case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15:
+ ret = synic_set_sint(synic, msr - HV_X64_MSR_SINT0, data, host);
+ break;
+ default:
+ ret = 1;
+ break;
+ }
+ return ret;
+}
+
+static int synic_get_msr(struct kvm_vcpu_hv_synic *synic, u32 msr, u64 *pdata)
+{
+ int ret;
+
+ if (!synic->active)
+ return 1;
+
+ ret = 0;
+ switch (msr) {
+ case HV_X64_MSR_SCONTROL:
+ *pdata = synic->control;
+ break;
+ case HV_X64_MSR_SVERSION:
+ *pdata = synic->version;
+ break;
+ case HV_X64_MSR_SIEFP:
+ *pdata = synic->evt_page;
+ break;
+ case HV_X64_MSR_SIMP:
+ *pdata = synic->msg_page;
+ break;
+ case HV_X64_MSR_EOM:
+ *pdata = 0;
+ break;
+ case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15:
+ *pdata = atomic64_read(&synic->sint[msr - HV_X64_MSR_SINT0]);
+ break;
+ default:
+ ret = 1;
+ break;
+ }
+ return ret;
+}
+
+int synic_set_irq(struct kvm_vcpu_hv_synic *synic, u32 sint)
+{
+ struct kvm_vcpu *vcpu = synic_to_vcpu(synic);
+ struct kvm_lapic_irq irq;
+ int ret, vector;
+
+ if (sint >= ARRAY_SIZE(synic->sint))
+ return -EINVAL;
+
+ vector = synic_get_sint_vector(synic_read_sint(synic, sint));
+ if (vector < 0)
+ return -ENOENT;
+
+ memset(&irq, 0, sizeof(irq));
+ irq.dest_id = kvm_apic_id(vcpu->arch.apic);
+ irq.dest_mode = APIC_DEST_PHYSICAL;
+ irq.delivery_mode = APIC_DM_FIXED;
+ irq.vector = vector;
+ irq.level = 1;
+
+ ret = kvm_irq_delivery_to_apic(vcpu->kvm, NULL, &irq, NULL);
+ trace_kvm_hv_synic_set_irq(vcpu->vcpu_id, sint, irq.vector, ret);
+ return ret;
+}
+
+int kvm_hv_synic_set_irq(struct kvm *kvm, u32 vcpu_id, u32 sint)
+{
+ struct kvm_vcpu_hv_synic *synic;
+
+ synic = synic_get(kvm, vcpu_id);
+ if (!synic)
+ return -EINVAL;
+
+ return synic_set_irq(synic, sint);
+}
+
+void kvm_hv_synic_send_eoi(struct kvm_vcpu *vcpu, int vector)
+{
+ struct kvm_vcpu_hv_synic *synic = vcpu_to_synic(vcpu);
+ int i;
+
+ trace_kvm_hv_synic_send_eoi(vcpu->vcpu_id, vector);
+
+ for (i = 0; i < ARRAY_SIZE(synic->sint); i++)
+ if (synic_get_sint_vector(synic_read_sint(synic, i)) == vector)
+ kvm_hv_notify_acked_sint(vcpu, i);
+}
+
+static int kvm_hv_set_sint_gsi(struct kvm *kvm, u32 vcpu_id, u32 sint, int gsi)
+{
+ struct kvm_vcpu_hv_synic *synic;
+
+ synic = synic_get(kvm, vcpu_id);
+ if (!synic)
+ return -EINVAL;
+
+ if (sint >= ARRAY_SIZE(synic->sint_to_gsi))
+ return -EINVAL;
+
+ atomic_set(&synic->sint_to_gsi[sint], gsi);
+ return 0;
+}
+
+void kvm_hv_irq_routing_update(struct kvm *kvm)
+{
+ struct kvm_irq_routing_table *irq_rt;
+ struct kvm_kernel_irq_routing_entry *e;
+ u32 gsi;
+
+ irq_rt = srcu_dereference_check(kvm->irq_routing, &kvm->irq_srcu,
+ lockdep_is_held(&kvm->irq_lock));
+
+ for (gsi = 0; gsi < irq_rt->nr_rt_entries; gsi++) {
+ hlist_for_each_entry(e, &irq_rt->map[gsi], link) {
+ if (e->type == KVM_IRQ_ROUTING_HV_SINT)
+ kvm_hv_set_sint_gsi(kvm, e->hv_sint.vcpu,
+ e->hv_sint.sint, gsi);
+ }
+ }
+}
+
+static void synic_init(struct kvm_vcpu_hv_synic *synic)
+{
+ int i;
+
+ memset(synic, 0, sizeof(*synic));
+ synic->version = HV_SYNIC_VERSION_1;
+ for (i = 0; i < ARRAY_SIZE(synic->sint); i++) {
+ atomic64_set(&synic->sint[i], HV_SYNIC_SINT_MASKED);
+ atomic_set(&synic->sint_to_gsi[i], -1);
+ }
+}
+
+static u64 get_time_ref_counter(struct kvm *kvm)
+{
+ return div_u64(get_kernel_ns() + kvm->arch.kvmclock_offset, 100);
+}
+
+static void stimer_mark_pending(struct kvm_vcpu_hv_stimer *stimer,
+ bool vcpu_kick)
+{
+ struct kvm_vcpu *vcpu = stimer_to_vcpu(stimer);
+
+ set_bit(stimer->index,
+ vcpu_to_hv_vcpu(vcpu)->stimer_pending_bitmap);
+ kvm_make_request(KVM_REQ_HV_STIMER, vcpu);
+ if (vcpu_kick)
+ kvm_vcpu_kick(vcpu);
+}
+
+static void stimer_cleanup(struct kvm_vcpu_hv_stimer *stimer)
+{
+ struct kvm_vcpu *vcpu = stimer_to_vcpu(stimer);
+
+ trace_kvm_hv_stimer_cleanup(stimer_to_vcpu(stimer)->vcpu_id,
+ stimer->index);
+
+ hrtimer_cancel(&stimer->timer);
+ clear_bit(stimer->index,
+ vcpu_to_hv_vcpu(vcpu)->stimer_pending_bitmap);
+ stimer->msg_pending = false;
+ stimer->exp_time = 0;
+}
+
+static enum hrtimer_restart stimer_timer_callback(struct hrtimer *timer)
+{
+ struct kvm_vcpu_hv_stimer *stimer;
+
+ stimer = container_of(timer, struct kvm_vcpu_hv_stimer, timer);
+ trace_kvm_hv_stimer_callback(stimer_to_vcpu(stimer)->vcpu_id,
+ stimer->index);
+ stimer_mark_pending(stimer, true);
+
+ return HRTIMER_NORESTART;
+}
+
+/*
+ * stimer_start() assumptions:
+ * a) stimer->count is not equal to 0
+ * b) stimer->config has HV_STIMER_ENABLE flag
+ */
+static int stimer_start(struct kvm_vcpu_hv_stimer *stimer)
+{
+ u64 time_now;
+ ktime_t ktime_now;
+
+ time_now = get_time_ref_counter(stimer_to_vcpu(stimer)->kvm);
+ ktime_now = ktime_get();
+
+ if (stimer->config & HV_STIMER_PERIODIC) {
+ if (stimer->exp_time) {
+ if (time_now >= stimer->exp_time) {
+ u64 remainder;
+
+ div64_u64_rem(time_now - stimer->exp_time,
+ stimer->count, &remainder);
+ stimer->exp_time =
+ time_now + (stimer->count - remainder);
+ }
+ } else
+ stimer->exp_time = time_now + stimer->count;
+
+ trace_kvm_hv_stimer_start_periodic(
+ stimer_to_vcpu(stimer)->vcpu_id,
+ stimer->index,
+ time_now, stimer->exp_time);
+
+ hrtimer_start(&stimer->timer,
+ ktime_add_ns(ktime_now,
+ 100 * (stimer->exp_time - time_now)),
+ HRTIMER_MODE_ABS);
+ return 0;
+ }
+ stimer->exp_time = stimer->count;
+ if (time_now >= stimer->count) {
+ /*
+ * Expire timer according to Hypervisor Top-Level Functional
+ * specification v4(15.3.1):
+ * "If a one shot is enabled and the specified count is in
+ * the past, it will expire immediately."
+ */
+ stimer_mark_pending(stimer, false);
+ return 0;
+ }
+
+ trace_kvm_hv_stimer_start_one_shot(stimer_to_vcpu(stimer)->vcpu_id,
+ stimer->index,
+ time_now, stimer->count);
+
+ hrtimer_start(&stimer->timer,
+ ktime_add_ns(ktime_now, 100 * (stimer->count - time_now)),
+ HRTIMER_MODE_ABS);
+ return 0;
+}
+
+static int stimer_set_config(struct kvm_vcpu_hv_stimer *stimer, u64 config,
+ bool host)
+{
+ trace_kvm_hv_stimer_set_config(stimer_to_vcpu(stimer)->vcpu_id,
+ stimer->index, config, host);
+
+ stimer_cleanup(stimer);
+ if ((stimer->config & HV_STIMER_ENABLE) && HV_STIMER_SINT(config) == 0)
+ config &= ~HV_STIMER_ENABLE;
+ stimer->config = config;
+ stimer_mark_pending(stimer, false);
+ return 0;
+}
+
+static int stimer_set_count(struct kvm_vcpu_hv_stimer *stimer, u64 count,
+ bool host)
+{
+ trace_kvm_hv_stimer_set_count(stimer_to_vcpu(stimer)->vcpu_id,
+ stimer->index, count, host);
+
+ stimer_cleanup(stimer);
+ stimer->count = count;
+ if (stimer->count == 0)
+ stimer->config &= ~HV_STIMER_ENABLE;
+ else if (stimer->config & HV_STIMER_AUTOENABLE)
+ stimer->config |= HV_STIMER_ENABLE;
+ stimer_mark_pending(stimer, false);
+ return 0;
+}
+
+static int stimer_get_config(struct kvm_vcpu_hv_stimer *stimer, u64 *pconfig)
+{
+ *pconfig = stimer->config;
+ return 0;
+}
+
+static int stimer_get_count(struct kvm_vcpu_hv_stimer *stimer, u64 *pcount)
+{
+ *pcount = stimer->count;
+ return 0;
+}
+
+static int synic_deliver_msg(struct kvm_vcpu_hv_synic *synic, u32 sint,
+ struct hv_message *src_msg)
+{
+ struct kvm_vcpu *vcpu = synic_to_vcpu(synic);
+ struct page *page;
+ gpa_t gpa;
+ struct hv_message *dst_msg;
+ int r;
+ struct hv_message_page *msg_page;
+
+ if (!(synic->msg_page & HV_SYNIC_SIMP_ENABLE))
+ return -ENOENT;
+
+ gpa = synic->msg_page & PAGE_MASK;
+ page = kvm_vcpu_gfn_to_page(vcpu, gpa >> PAGE_SHIFT);
+ if (is_error_page(page))
+ return -EFAULT;
+
+ msg_page = kmap_atomic(page);
+ dst_msg = &msg_page->sint_message[sint];
+ if (sync_cmpxchg(&dst_msg->header.message_type, HVMSG_NONE,
+ src_msg->header.message_type) != HVMSG_NONE) {
+ dst_msg->header.message_flags.msg_pending = 1;
+ r = -EAGAIN;
+ } else {
+ memcpy(&dst_msg->u.payload, &src_msg->u.payload,
+ src_msg->header.payload_size);
+ dst_msg->header.message_type = src_msg->header.message_type;
+ dst_msg->header.payload_size = src_msg->header.payload_size;
+ r = synic_set_irq(synic, sint);
+ if (r >= 1)
+ r = 0;
+ else if (r == 0)
+ r = -EFAULT;
+ }
+ kunmap_atomic(msg_page);
+ kvm_release_page_dirty(page);
+ kvm_vcpu_mark_page_dirty(vcpu, gpa >> PAGE_SHIFT);
+ return r;
+}
+
+static int stimer_send_msg(struct kvm_vcpu_hv_stimer *stimer)
+{
+ struct kvm_vcpu *vcpu = stimer_to_vcpu(stimer);
+ struct hv_message *msg = &stimer->msg;
+ struct hv_timer_message_payload *payload =
+ (struct hv_timer_message_payload *)&msg->u.payload;
+
+ payload->expiration_time = stimer->exp_time;
+ payload->delivery_time = get_time_ref_counter(vcpu->kvm);
+ return synic_deliver_msg(vcpu_to_synic(vcpu),
+ HV_STIMER_SINT(stimer->config), msg);
+}
+
+static void stimer_expiration(struct kvm_vcpu_hv_stimer *stimer)
+{
+ int r;
+
+ stimer->msg_pending = true;
+ r = stimer_send_msg(stimer);
+ trace_kvm_hv_stimer_expiration(stimer_to_vcpu(stimer)->vcpu_id,
+ stimer->index, r);
+ if (!r) {
+ stimer->msg_pending = false;
+ if (!(stimer->config & HV_STIMER_PERIODIC))
+ stimer->config &= ~HV_STIMER_ENABLE;
+ }
+}
+
+void kvm_hv_process_stimers(struct kvm_vcpu *vcpu)
+{
+ struct kvm_vcpu_hv *hv_vcpu = vcpu_to_hv_vcpu(vcpu);
+ struct kvm_vcpu_hv_stimer *stimer;
+ u64 time_now, exp_time;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(hv_vcpu->stimer); i++)
+ if (test_and_clear_bit(i, hv_vcpu->stimer_pending_bitmap)) {
+ stimer = &hv_vcpu->stimer[i];
+ if (stimer->config & HV_STIMER_ENABLE) {
+ exp_time = stimer->exp_time;
+
+ if (exp_time) {
+ time_now =
+ get_time_ref_counter(vcpu->kvm);
+ if (time_now >= exp_time)
+ stimer_expiration(stimer);
+ }
+
+ if ((stimer->config & HV_STIMER_ENABLE) &&
+ stimer->count)
+ stimer_start(stimer);
+ else
+ stimer_cleanup(stimer);
+ }
+ }
+}
+
+void kvm_hv_vcpu_uninit(struct kvm_vcpu *vcpu)
+{
+ struct kvm_vcpu_hv *hv_vcpu = vcpu_to_hv_vcpu(vcpu);
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(hv_vcpu->stimer); i++)
+ stimer_cleanup(&hv_vcpu->stimer[i]);
+}
+
+static void stimer_prepare_msg(struct kvm_vcpu_hv_stimer *stimer)
+{
+ struct hv_message *msg = &stimer->msg;
+ struct hv_timer_message_payload *payload =
+ (struct hv_timer_message_payload *)&msg->u.payload;
+
+ memset(&msg->header, 0, sizeof(msg->header));
+ msg->header.message_type = HVMSG_TIMER_EXPIRED;
+ msg->header.payload_size = sizeof(*payload);
+
+ payload->timer_index = stimer->index;
+ payload->expiration_time = 0;
+ payload->delivery_time = 0;
+}
+
+static void stimer_init(struct kvm_vcpu_hv_stimer *stimer, int timer_index)
+{
+ memset(stimer, 0, sizeof(*stimer));
+ stimer->index = timer_index;
+ hrtimer_init(&stimer->timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+ stimer->timer.function = stimer_timer_callback;
+ stimer_prepare_msg(stimer);
+}
+
+void kvm_hv_vcpu_init(struct kvm_vcpu *vcpu)
+{
+ struct kvm_vcpu_hv *hv_vcpu = vcpu_to_hv_vcpu(vcpu);
+ int i;
+
+ synic_init(&hv_vcpu->synic);
+
+ bitmap_zero(hv_vcpu->stimer_pending_bitmap, HV_SYNIC_STIMER_COUNT);
+ for (i = 0; i < ARRAY_SIZE(hv_vcpu->stimer); i++)
+ stimer_init(&hv_vcpu->stimer[i], i);
+}
+
+int kvm_hv_activate_synic(struct kvm_vcpu *vcpu)
+{
+ /*
+ * Hyper-V SynIC auto EOI SINT's are
+ * not compatible with APICV, so deactivate APICV
+ */
+ kvm_vcpu_deactivate_apicv(vcpu);
+ vcpu_to_synic(vcpu)->active = true;
+ return 0;
+}
+
static bool kvm_hv_msr_partition_wide(u32 msr)
{
bool r = false;
@@ -226,6 +878,31 @@ static int kvm_hv_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data, bool host)
return 1;
hv->runtime_offset = data - current_task_runtime_100ns();
break;
+ case HV_X64_MSR_SCONTROL:
+ case HV_X64_MSR_SVERSION:
+ case HV_X64_MSR_SIEFP:
+ case HV_X64_MSR_SIMP:
+ case HV_X64_MSR_EOM:
+ case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15:
+ return synic_set_msr(vcpu_to_synic(vcpu), msr, data, host);
+ case HV_X64_MSR_STIMER0_CONFIG:
+ case HV_X64_MSR_STIMER1_CONFIG:
+ case HV_X64_MSR_STIMER2_CONFIG:
+ case HV_X64_MSR_STIMER3_CONFIG: {
+ int timer_index = (msr - HV_X64_MSR_STIMER0_CONFIG)/2;
+
+ return stimer_set_config(vcpu_to_stimer(vcpu, timer_index),
+ data, host);
+ }
+ case HV_X64_MSR_STIMER0_COUNT:
+ case HV_X64_MSR_STIMER1_COUNT:
+ case HV_X64_MSR_STIMER2_COUNT:
+ case HV_X64_MSR_STIMER3_COUNT: {
+ int timer_index = (msr - HV_X64_MSR_STIMER0_COUNT)/2;
+
+ return stimer_set_count(vcpu_to_stimer(vcpu, timer_index),
+ data, host);
+ }
default:
vcpu_unimpl(vcpu, "Hyper-V uhandled wrmsr: 0x%x data 0x%llx\n",
msr, data);
@@ -248,11 +925,9 @@ static int kvm_hv_get_msr_pw(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
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);
+ case HV_X64_MSR_TIME_REF_COUNT:
+ data = get_time_ref_counter(kvm);
break;
- }
case HV_X64_MSR_REFERENCE_TSC:
data = hv->hv_tsc_page;
break;
@@ -304,6 +979,31 @@ static int kvm_hv_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
case HV_X64_MSR_VP_RUNTIME:
data = current_task_runtime_100ns() + hv->runtime_offset;
break;
+ case HV_X64_MSR_SCONTROL:
+ case HV_X64_MSR_SVERSION:
+ case HV_X64_MSR_SIEFP:
+ case HV_X64_MSR_SIMP:
+ case HV_X64_MSR_EOM:
+ case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15:
+ return synic_get_msr(vcpu_to_synic(vcpu), msr, pdata);
+ case HV_X64_MSR_STIMER0_CONFIG:
+ case HV_X64_MSR_STIMER1_CONFIG:
+ case HV_X64_MSR_STIMER2_CONFIG:
+ case HV_X64_MSR_STIMER3_CONFIG: {
+ int timer_index = (msr - HV_X64_MSR_STIMER0_CONFIG)/2;
+
+ return stimer_get_config(vcpu_to_stimer(vcpu, timer_index),
+ pdata);
+ }
+ case HV_X64_MSR_STIMER0_COUNT:
+ case HV_X64_MSR_STIMER1_COUNT:
+ case HV_X64_MSR_STIMER2_COUNT:
+ case HV_X64_MSR_STIMER3_COUNT: {
+ int timer_index = (msr - HV_X64_MSR_STIMER0_COUNT)/2;
+
+ return stimer_get_count(vcpu_to_stimer(vcpu, timer_index),
+ pdata);
+ }
default:
vcpu_unimpl(vcpu, "Hyper-V unhandled rdmsr: 0x%x\n", msr);
return 1;