5e95381260
The definitions for Hyper-V emulation are currently taken from a header imported from the Linux kernel. However, as these describe a third-party protocol rather than a kernel API, it probably wasn't a good idea to publish it in the kernel uapi. This patch introduces a header that provides all the necessary definitions, superseding the one coming from the kernel. The new header supports (temporary) coexistence with the kernel one. The constants explicitly named in the Hyper-V specification (e.g. msr numbers) are defined in a non-conflicting way. Other constants and types have got new names. While at this, the protocol data structures are defined in a more conventional way, without bitfields, enums, and excessive unions. The code using this stuff is adjusted, too; it can now be built both with and without the kernel header in the tree. Signed-off-by: Roman Kagan <rkagan@virtuozzo.com> Message-Id: <20170713201522.13765-2-rkagan@virtuozzo.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
142 lines
4.0 KiB
C
142 lines
4.0 KiB
C
/*
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* QEMU KVM Hyper-V support
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*
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* Copyright (C) 2015 Andrey Smetanin <asmetanin@virtuozzo.com>
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*
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* Authors:
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* Andrey Smetanin <asmetanin@virtuozzo.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include "qemu/osdep.h"
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#include "qemu/main-loop.h"
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#include "hyperv.h"
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#include "hyperv-proto.h"
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int kvm_hv_handle_exit(X86CPU *cpu, struct kvm_hyperv_exit *exit)
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{
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CPUX86State *env = &cpu->env;
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switch (exit->type) {
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case KVM_EXIT_HYPERV_SYNIC:
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if (!cpu->hyperv_synic) {
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return -1;
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}
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/*
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* For now just track changes in SynIC control and msg/evt pages msr's.
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* When SynIC messaging/events processing will be added in future
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* here we will do messages queues flushing and pages remapping.
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*/
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switch (exit->u.synic.msr) {
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case HV_X64_MSR_SCONTROL:
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env->msr_hv_synic_control = exit->u.synic.control;
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break;
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case HV_X64_MSR_SIMP:
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env->msr_hv_synic_msg_page = exit->u.synic.msg_page;
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break;
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case HV_X64_MSR_SIEFP:
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env->msr_hv_synic_evt_page = exit->u.synic.evt_page;
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break;
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default:
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return -1;
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}
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return 0;
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case KVM_EXIT_HYPERV_HCALL: {
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uint16_t code;
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code = exit->u.hcall.input & 0xffff;
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switch (code) {
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case HV_POST_MESSAGE:
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case HV_SIGNAL_EVENT:
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default:
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exit->u.hcall.result = HV_STATUS_INVALID_HYPERCALL_CODE;
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return 0;
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}
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}
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default:
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return -1;
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}
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}
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static void kvm_hv_sint_ack_handler(EventNotifier *notifier)
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{
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HvSintRoute *sint_route = container_of(notifier, HvSintRoute,
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sint_ack_notifier);
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event_notifier_test_and_clear(notifier);
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if (sint_route->sint_ack_clb) {
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sint_route->sint_ack_clb(sint_route);
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}
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}
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HvSintRoute *kvm_hv_sint_route_create(uint32_t vcpu_id, uint32_t sint,
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HvSintAckClb sint_ack_clb)
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{
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HvSintRoute *sint_route;
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int r, gsi;
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sint_route = g_malloc0(sizeof(*sint_route));
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r = event_notifier_init(&sint_route->sint_set_notifier, false);
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if (r) {
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goto err;
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}
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r = event_notifier_init(&sint_route->sint_ack_notifier, false);
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if (r) {
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goto err_sint_set_notifier;
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}
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event_notifier_set_handler(&sint_route->sint_ack_notifier,
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kvm_hv_sint_ack_handler);
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gsi = kvm_irqchip_add_hv_sint_route(kvm_state, vcpu_id, sint);
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if (gsi < 0) {
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goto err_gsi;
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}
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r = kvm_irqchip_add_irqfd_notifier_gsi(kvm_state,
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&sint_route->sint_set_notifier,
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&sint_route->sint_ack_notifier, gsi);
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if (r) {
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goto err_irqfd;
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}
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sint_route->gsi = gsi;
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sint_route->sint_ack_clb = sint_ack_clb;
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sint_route->vcpu_id = vcpu_id;
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sint_route->sint = sint;
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return sint_route;
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err_irqfd:
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kvm_irqchip_release_virq(kvm_state, gsi);
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err_gsi:
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event_notifier_set_handler(&sint_route->sint_ack_notifier, NULL);
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event_notifier_cleanup(&sint_route->sint_ack_notifier);
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err_sint_set_notifier:
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event_notifier_cleanup(&sint_route->sint_set_notifier);
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err:
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g_free(sint_route);
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return NULL;
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}
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void kvm_hv_sint_route_destroy(HvSintRoute *sint_route)
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{
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kvm_irqchip_remove_irqfd_notifier_gsi(kvm_state,
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&sint_route->sint_set_notifier,
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sint_route->gsi);
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kvm_irqchip_release_virq(kvm_state, sint_route->gsi);
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event_notifier_set_handler(&sint_route->sint_ack_notifier, NULL);
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event_notifier_cleanup(&sint_route->sint_ack_notifier);
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event_notifier_cleanup(&sint_route->sint_set_notifier);
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g_free(sint_route);
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}
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int kvm_hv_sint_route_set_sint(HvSintRoute *sint_route)
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{
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return event_notifier_set(&sint_route->sint_set_notifier);
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}
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