Commit 50efe82c authored by Andrey Smetanin's avatar Andrey Smetanin Committed by Paolo Bonzini
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target-i386/hyperv: Hyper-V SynIC SINT routing and vcpu exit 



Hyper-V SynIC(synthetic interrupt controller) helpers for
Hyper-V SynIC irq routing setup, irq injection, irq ack
notifications event/message pages changes tracking for future use.

Signed-off-by: default avatarAndrey Smetanin <asmetanin@virtuozzo.com>
Reviewed-by: default avatarRoman Kagan <rkagan@virtuozzo.com>
Signed-off-by: default avatarDenis V. Lunev <den@openvz.org>
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: Richard Henderson <rth@twiddle.net>
CC: Eduardo Habkost <ehabkost@redhat.com>
CC: "Andreas Färber" <afaerber@suse.de>
CC: Marcelo Tosatti <mtosatti@redhat.com>
CC: Roman Kagan <rkagan@virtuozzo.com>
CC: Denis V. Lunev <den@openvz.org>
CC: kvm@vger.kernel.org
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent 977a8d9c

target-i386/Makefile.objs

+1 −1
Original line number Diff line number Diff line
@@ -3,5 +3,5 @@ obj-y += excp_helper.o fpu_helper.o cc_helper.o int_helper.o svm_helper.o 
obj-y += smm_helper.o misc_helper.o mem_helper.o seg_helper.o

obj-y += gdbstub.o

obj-$(CONFIG_SOFTMMU) += machine.o arch_memory_mapping.o arch_dump.o monitor.o

obj-$(CONFIG_KVM) += kvm.o

obj-$(CONFIG_KVM) += kvm.o hyperv.o

obj-$(call lnot,$(CONFIG_KVM)) += kvm-stub.o

target-i386/hyperv.c

0 → 100644
+127 −0
Original line number Diff line number Diff line 
/*

 * 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 "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;

    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,

                               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, 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, 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);

}

target-i386/hyperv.h

0 → 100644
+42 −0
Original line number Diff line number Diff line 
/*

 * 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.

 *

 */



#ifndef HYPERV_I386_H

#define HYPERV_I386_H



#include "cpu.h"

#include "sysemu/kvm.h"

#include "qemu/event_notifier.h"



typedef struct HvSintRoute HvSintRoute;

typedef void (*HvSintAckClb)(HvSintRoute *sint_route);



struct HvSintRoute {

    uint32_t sint;

    uint32_t vcpu_id;

    int gsi;

    EventNotifier sint_set_notifier;

    EventNotifier sint_ack_notifier;

    HvSintAckClb sint_ack_clb;

};



int kvm_hv_handle_exit(X86CPU *cpu, struct kvm_hyperv_exit *exit);



HvSintRoute *kvm_hv_sint_route_create(uint32_t vcpu_id, uint32_t sint,

                                      HvSintAckClb sint_ack_clb);



void kvm_hv_sint_route_destroy(HvSintRoute *sint_route);



int kvm_hv_sint_route_set_sint(HvSintRoute *sint_route);



#endif

target-i386/kvm.c

+6 −0
Original line number Diff line number Diff line
@@ -25,6 +25,8 @@ 
#include "sysemu/kvm_int.h"

#include "kvm_i386.h"

#include "cpu.h"

#include "hyperv.h"



#include "exec/gdbstub.h"

#include "qemu/host-utils.h"

#include "qemu/config-file.h"
@@ -33,6 +35,7 @@ 
#include "hw/i386/apic.h"

#include "hw/i386/apic_internal.h"

#include "hw/i386/apic-msidef.h"



#include "exec/ioport.h"

#include "standard-headers/asm-x86/hyperv.h"

#include "hw/pci/pci.h"
@@ -2963,6 +2966,9 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run) 
        ret = kvm_handle_debug(cpu, &run->debug.arch);

        qemu_mutex_unlock_iothread();

        break;

    case KVM_EXIT_HYPERV:

        ret = kvm_hv_handle_exit(cpu, &run->hyperv);

        break;

    default:

        fprintf(stderr, "KVM: unknown exit reason %d\n", run->exit_reason);

        ret = -1;