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-rw-r--r--target/i386/hyperv.c140
1 files changed, 140 insertions, 0 deletions
diff --git a/target/i386/hyperv.c b/target/i386/hyperv.c
new file mode 100644
index 0000000000..39a230f119
--- /dev/null
+++ b/target/i386/hyperv.c
@@ -0,0 +1,140 @@
+/*
+ * QEMU KVM Hyper-V support
+ *
+ * Copyright (C) 2015 Andrey Smetanin <asmetanin@virtuozzo.com>
+ *
+ * Authors:
+ * Andrey Smetanin <asmetanin@virtuozzo.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ *
+ */
+
+#include "qemu/osdep.h"
+#include "hyperv.h"
+#include "standard-headers/asm-x86/hyperv.h"
+
+int kvm_hv_handle_exit(X86CPU *cpu, struct kvm_hyperv_exit *exit)
+{
+ CPUX86State *env = &cpu->env;
+
+ switch (exit->type) {
+ case KVM_EXIT_HYPERV_SYNIC:
+ if (!cpu->hyperv_synic) {
+ return -1;
+ }
+
+ /*
+ * For now just track changes in SynIC control and msg/evt pages msr's.
+ * When SynIC messaging/events processing will be added in future
+ * here we will do messages queues flushing and pages remapping.
+ */
+ switch (exit->u.synic.msr) {
+ case HV_X64_MSR_SCONTROL:
+ env->msr_hv_synic_control = exit->u.synic.control;
+ break;
+ case HV_X64_MSR_SIMP:
+ env->msr_hv_synic_msg_page = exit->u.synic.msg_page;
+ break;
+ case HV_X64_MSR_SIEFP:
+ env->msr_hv_synic_evt_page = exit->u.synic.evt_page;
+ break;
+ default:
+ return -1;
+ }
+ return 0;
+ case KVM_EXIT_HYPERV_HCALL: {
+ uint16_t code;
+
+ code = exit->u.hcall.input & 0xffff;
+ switch (code) {
+ case HVCALL_POST_MESSAGE:
+ case HVCALL_SIGNAL_EVENT:
+ default:
+ exit->u.hcall.result = HV_STATUS_INVALID_HYPERCALL_CODE;
+ return 0;
+ }
+ }
+ default:
+ return -1;
+ }
+}
+
+static void kvm_hv_sint_ack_handler(EventNotifier *notifier)
+{
+ HvSintRoute *sint_route = container_of(notifier, HvSintRoute,
+ sint_ack_notifier);
+ event_notifier_test_and_clear(notifier);
+ if (sint_route->sint_ack_clb) {
+ sint_route->sint_ack_clb(sint_route);
+ }
+}
+
+HvSintRoute *kvm_hv_sint_route_create(uint32_t vcpu_id, uint32_t sint,
+ HvSintAckClb sint_ack_clb)
+{
+ HvSintRoute *sint_route;
+ int r, gsi;
+
+ sint_route = g_malloc0(sizeof(*sint_route));
+ r = event_notifier_init(&sint_route->sint_set_notifier, false);
+ if (r) {
+ goto err;
+ }
+
+ r = event_notifier_init(&sint_route->sint_ack_notifier, false);
+ if (r) {
+ goto err_sint_set_notifier;
+ }
+
+ event_notifier_set_handler(&sint_route->sint_ack_notifier, false,
+ kvm_hv_sint_ack_handler);
+
+ gsi = kvm_irqchip_add_hv_sint_route(kvm_state, vcpu_id, sint);
+ if (gsi < 0) {
+ goto err_gsi;
+ }
+
+ r = kvm_irqchip_add_irqfd_notifier_gsi(kvm_state,
+ &sint_route->sint_set_notifier,
+ &sint_route->sint_ack_notifier, gsi);
+ if (r) {
+ goto err_irqfd;
+ }
+ sint_route->gsi = gsi;
+ sint_route->sint_ack_clb = sint_ack_clb;
+ sint_route->vcpu_id = vcpu_id;
+ sint_route->sint = sint;
+
+ return sint_route;
+
+err_irqfd:
+ kvm_irqchip_release_virq(kvm_state, gsi);
+err_gsi:
+ event_notifier_set_handler(&sint_route->sint_ack_notifier, false, NULL);
+ event_notifier_cleanup(&sint_route->sint_ack_notifier);
+err_sint_set_notifier:
+ event_notifier_cleanup(&sint_route->sint_set_notifier);
+err:
+ g_free(sint_route);
+
+ return NULL;
+}
+
+void kvm_hv_sint_route_destroy(HvSintRoute *sint_route)
+{
+ kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state,
+ &sint_route->sint_set_notifier,
+ sint_route->gsi);
+ kvm_irqchip_release_virq(kvm_state, sint_route->gsi);
+ event_notifier_set_handler(&sint_route->sint_ack_notifier, false, NULL);
+ event_notifier_cleanup(&sint_route->sint_ack_notifier);
+ event_notifier_cleanup(&sint_route->sint_set_notifier);
+ g_free(sint_route);
+}
+
+int kvm_hv_sint_route_set_sint(HvSintRoute *sint_route)
+{
+ return event_notifier_set(&sint_route->sint_set_notifier);
+}