X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Fhw%2Fintc%2Fapic_common.c;fp=qemu%2Fhw%2Fintc%2Fapic_common.c;h=0032b97c5fe157cc2ffb6ec8c01442a4e01ae680;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git

diff --git a/qemu/hw/intc/apic_common.c b/qemu/hw/intc/apic_common.c
new file mode 100644
index 000000000..0032b97c5
--- /dev/null
+++ b/qemu/hw/intc/apic_common.c
@@ -0,0 +1,456 @@
+/*
+ *  APIC support - common bits of emulated and KVM kernel model
+ *
+ *  Copyright (c) 2004-2005 Fabrice Bellard
+ *  Copyright (c) 2011      Jan Kiszka, Siemens AG
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ */
+#include "hw/i386/apic.h"
+#include "hw/i386/apic_internal.h"
+#include "trace.h"
+#include "sysemu/kvm.h"
+#include "hw/qdev.h"
+#include "hw/sysbus.h"
+
+static int apic_irq_delivered;
+bool apic_report_tpr_access;
+
+void cpu_set_apic_base(DeviceState *dev, uint64_t val)
+{
+    trace_cpu_set_apic_base(val);
+
+    if (dev) {
+        APICCommonState *s = APIC_COMMON(dev);
+        APICCommonClass *info = APIC_COMMON_GET_CLASS(s);
+        info->set_base(s, val);
+    }
+}
+
+uint64_t cpu_get_apic_base(DeviceState *dev)
+{
+    if (dev) {
+        APICCommonState *s = APIC_COMMON(dev);
+        trace_cpu_get_apic_base((uint64_t)s->apicbase);
+        return s->apicbase;
+    } else {
+        trace_cpu_get_apic_base(MSR_IA32_APICBASE_BSP);
+        return MSR_IA32_APICBASE_BSP;
+    }
+}
+
+void cpu_set_apic_tpr(DeviceState *dev, uint8_t val)
+{
+    APICCommonState *s;
+    APICCommonClass *info;
+
+    if (!dev) {
+        return;
+    }
+
+    s = APIC_COMMON(dev);
+    info = APIC_COMMON_GET_CLASS(s);
+
+    info->set_tpr(s, val);
+}
+
+uint8_t cpu_get_apic_tpr(DeviceState *dev)
+{
+    APICCommonState *s;
+    APICCommonClass *info;
+
+    if (!dev) {
+        return 0;
+    }
+
+    s = APIC_COMMON(dev);
+    info = APIC_COMMON_GET_CLASS(s);
+
+    return info->get_tpr(s);
+}
+
+void apic_enable_tpr_access_reporting(DeviceState *dev, bool enable)
+{
+    APICCommonState *s = APIC_COMMON(dev);
+    APICCommonClass *info = APIC_COMMON_GET_CLASS(s);
+
+    apic_report_tpr_access = enable;
+    if (info->enable_tpr_reporting) {
+        info->enable_tpr_reporting(s, enable);
+    }
+}
+
+void apic_enable_vapic(DeviceState *dev, hwaddr paddr)
+{
+    APICCommonState *s = APIC_COMMON(dev);
+    APICCommonClass *info = APIC_COMMON_GET_CLASS(s);
+
+    s->vapic_paddr = paddr;
+    info->vapic_base_update(s);
+}
+
+void apic_handle_tpr_access_report(DeviceState *dev, target_ulong ip,
+                                   TPRAccess access)
+{
+    APICCommonState *s = APIC_COMMON(dev);
+
+    vapic_report_tpr_access(s->vapic, CPU(s->cpu), ip, access);
+}
+
+void apic_report_irq_delivered(int delivered)
+{
+    apic_irq_delivered += delivered;
+
+    trace_apic_report_irq_delivered(apic_irq_delivered);
+}
+
+void apic_reset_irq_delivered(void)
+{
+    /* Copy this into a local variable to encourage gcc to emit a plain
+     * register for a sys/sdt.h marker.  For details on this workaround, see:
+     * https://sourceware.org/bugzilla/show_bug.cgi?id=13296
+     */
+    volatile int a_i_d = apic_irq_delivered;
+    trace_apic_reset_irq_delivered(a_i_d);
+
+    apic_irq_delivered = 0;
+}
+
+int apic_get_irq_delivered(void)
+{
+    trace_apic_get_irq_delivered(apic_irq_delivered);
+
+    return apic_irq_delivered;
+}
+
+void apic_deliver_nmi(DeviceState *dev)
+{
+    APICCommonState *s = APIC_COMMON(dev);
+    APICCommonClass *info = APIC_COMMON_GET_CLASS(s);
+
+    info->external_nmi(s);
+}
+
+bool apic_next_timer(APICCommonState *s, int64_t current_time)
+{
+    int64_t d;
+
+    /* We need to store the timer state separately to support APIC
+     * implementations that maintain a non-QEMU timer, e.g. inside the
+     * host kernel. This open-coded state allows us to migrate between
+     * both models. */
+    s->timer_expiry = -1;
+
+    if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_MASKED) {
+        return false;
+    }
+
+    d = (current_time - s->initial_count_load_time) >> s->count_shift;
+
+    if (s->lvt[APIC_LVT_TIMER] & APIC_LVT_TIMER_PERIODIC) {
+        if (!s->initial_count) {
+            return false;
+        }
+        d = ((d / ((uint64_t)s->initial_count + 1)) + 1) *
+            ((uint64_t)s->initial_count + 1);
+    } else {
+        if (d >= s->initial_count) {
+            return false;
+        }
+        d = (uint64_t)s->initial_count + 1;
+    }
+    s->next_time = s->initial_count_load_time + (d << s->count_shift);
+    s->timer_expiry = s->next_time;
+    return true;
+}
+
+void apic_init_reset(DeviceState *dev)
+{
+    APICCommonState *s;
+    APICCommonClass *info;
+    int i;
+
+    if (!dev) {
+        return;
+    }
+    s = APIC_COMMON(dev);
+    s->tpr = 0;
+    s->spurious_vec = 0xff;
+    s->log_dest = 0;
+    s->dest_mode = 0xf;
+    memset(s->isr, 0, sizeof(s->isr));
+    memset(s->tmr, 0, sizeof(s->tmr));
+    memset(s->irr, 0, sizeof(s->irr));
+    for (i = 0; i < APIC_LVT_NB; i++) {
+        s->lvt[i] = APIC_LVT_MASKED;
+    }
+    s->esr = 0;
+    memset(s->icr, 0, sizeof(s->icr));
+    s->divide_conf = 0;
+    s->count_shift = 0;
+    s->initial_count = 0;
+    s->initial_count_load_time = 0;
+    s->next_time = 0;
+    s->wait_for_sipi = !cpu_is_bsp(s->cpu);
+
+    if (s->timer) {
+        timer_del(s->timer);
+    }
+    s->timer_expiry = -1;
+
+    info = APIC_COMMON_GET_CLASS(s);
+    if (info->reset) {
+        info->reset(s);
+    }
+}
+
+void apic_designate_bsp(DeviceState *dev, bool bsp)
+{
+    if (dev == NULL) {
+        return;
+    }
+
+    APICCommonState *s = APIC_COMMON(dev);
+    if (bsp) {
+        s->apicbase |= MSR_IA32_APICBASE_BSP;
+    } else {
+        s->apicbase &= ~MSR_IA32_APICBASE_BSP;
+    }
+}
+
+static void apic_reset_common(DeviceState *dev)
+{
+    APICCommonState *s = APIC_COMMON(dev);
+    APICCommonClass *info = APIC_COMMON_GET_CLASS(s);
+    uint32_t bsp;
+
+    bsp = s->apicbase & MSR_IA32_APICBASE_BSP;
+    s->apicbase = APIC_DEFAULT_ADDRESS | bsp | MSR_IA32_APICBASE_ENABLE;
+
+    s->vapic_paddr = 0;
+    info->vapic_base_update(s);
+
+    apic_init_reset(dev);
+}
+
+/* This function is only used for old state version 1 and 2 */
+static int apic_load_old(QEMUFile *f, void *opaque, int version_id)
+{
+    APICCommonState *s = opaque;
+    APICCommonClass *info = APIC_COMMON_GET_CLASS(s);
+    int i;
+
+    if (version_id > 2) {
+        return -EINVAL;
+    }
+
+    /* XXX: what if the base changes? (registered memory regions) */
+    qemu_get_be32s(f, &s->apicbase);
+    qemu_get_8s(f, &s->id);
+    qemu_get_8s(f, &s->arb_id);
+    qemu_get_8s(f, &s->tpr);
+    qemu_get_be32s(f, &s->spurious_vec);
+    qemu_get_8s(f, &s->log_dest);
+    qemu_get_8s(f, &s->dest_mode);
+    for (i = 0; i < 8; i++) {
+        qemu_get_be32s(f, &s->isr[i]);
+        qemu_get_be32s(f, &s->tmr[i]);
+        qemu_get_be32s(f, &s->irr[i]);
+    }
+    for (i = 0; i < APIC_LVT_NB; i++) {
+        qemu_get_be32s(f, &s->lvt[i]);
+    }
+    qemu_get_be32s(f, &s->esr);
+    qemu_get_be32s(f, &s->icr[0]);
+    qemu_get_be32s(f, &s->icr[1]);
+    qemu_get_be32s(f, &s->divide_conf);
+    s->count_shift = qemu_get_be32(f);
+    qemu_get_be32s(f, &s->initial_count);
+    s->initial_count_load_time = qemu_get_be64(f);
+    s->next_time = qemu_get_be64(f);
+
+    if (version_id >= 2) {
+        s->timer_expiry = qemu_get_be64(f);
+    }
+
+    if (info->post_load) {
+        info->post_load(s);
+    }
+    return 0;
+}
+
+static void apic_common_realize(DeviceState *dev, Error **errp)
+{
+    APICCommonState *s = APIC_COMMON(dev);
+    APICCommonClass *info;
+    static DeviceState *vapic;
+    static int apic_no;
+    static bool mmio_registered;
+
+    if (apic_no >= MAX_APICS) {
+        error_setg(errp, "%s initialization failed.",
+                   object_get_typename(OBJECT(dev)));
+        return;
+    }
+    s->idx = apic_no++;
+
+    info = APIC_COMMON_GET_CLASS(s);
+    info->realize(dev, errp);
+    if (!mmio_registered) {
+        ICCBus *b = ICC_BUS(qdev_get_parent_bus(dev));
+        memory_region_add_subregion(b->apic_address_space, 0, &s->io_memory);
+        mmio_registered = true;
+    }
+
+    /* Note: We need at least 1M to map the VAPIC option ROM */
+    if (!vapic && s->vapic_control & VAPIC_ENABLE_MASK &&
+        ram_size >= 1024 * 1024) {
+        vapic = sysbus_create_simple("kvmvapic", -1, NULL);
+    }
+    s->vapic = vapic;
+    if (apic_report_tpr_access && info->enable_tpr_reporting) {
+        info->enable_tpr_reporting(s, true);
+    }
+
+}
+
+static int apic_pre_load(void *opaque)
+{
+    APICCommonState *s = APIC_COMMON(opaque);
+
+    /* The default is !cpu_is_bsp(s->cpu), but the common value is 0
+     * so that's what apic_common_sipi_needed checks for.  Reset to
+     * the value that is assumed when the apic_sipi subsection is
+     * absent.
+     */
+    s->wait_for_sipi = 0;
+    return 0;
+}
+
+static void apic_dispatch_pre_save(void *opaque)
+{
+    APICCommonState *s = APIC_COMMON(opaque);
+    APICCommonClass *info = APIC_COMMON_GET_CLASS(s);
+
+    if (info->pre_save) {
+        info->pre_save(s);
+    }
+}
+
+static int apic_dispatch_post_load(void *opaque, int version_id)
+{
+    APICCommonState *s = APIC_COMMON(opaque);
+    APICCommonClass *info = APIC_COMMON_GET_CLASS(s);
+
+    if (info->post_load) {
+        info->post_load(s);
+    }
+    return 0;
+}
+
+static bool apic_common_sipi_needed(void *opaque)
+{
+    APICCommonState *s = APIC_COMMON(opaque);
+    return s->wait_for_sipi != 0;
+}
+
+static const VMStateDescription vmstate_apic_common_sipi = {
+    .name = "apic_sipi",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = apic_common_sipi_needed,
+    .fields = (VMStateField[]) {
+        VMSTATE_INT32(sipi_vector, APICCommonState),
+        VMSTATE_INT32(wait_for_sipi, APICCommonState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static const VMStateDescription vmstate_apic_common = {
+    .name = "apic",
+    .version_id = 3,
+    .minimum_version_id = 3,
+    .minimum_version_id_old = 1,
+    .load_state_old = apic_load_old,
+    .pre_load = apic_pre_load,
+    .pre_save = apic_dispatch_pre_save,
+    .post_load = apic_dispatch_post_load,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT32(apicbase, APICCommonState),
+        VMSTATE_UINT8(id, APICCommonState),
+        VMSTATE_UINT8(arb_id, APICCommonState),
+        VMSTATE_UINT8(tpr, APICCommonState),
+        VMSTATE_UINT32(spurious_vec, APICCommonState),
+        VMSTATE_UINT8(log_dest, APICCommonState),
+        VMSTATE_UINT8(dest_mode, APICCommonState),
+        VMSTATE_UINT32_ARRAY(isr, APICCommonState, 8),
+        VMSTATE_UINT32_ARRAY(tmr, APICCommonState, 8),
+        VMSTATE_UINT32_ARRAY(irr, APICCommonState, 8),
+        VMSTATE_UINT32_ARRAY(lvt, APICCommonState, APIC_LVT_NB),
+        VMSTATE_UINT32(esr, APICCommonState),
+        VMSTATE_UINT32_ARRAY(icr, APICCommonState, 2),
+        VMSTATE_UINT32(divide_conf, APICCommonState),
+        VMSTATE_INT32(count_shift, APICCommonState),
+        VMSTATE_UINT32(initial_count, APICCommonState),
+        VMSTATE_INT64(initial_count_load_time, APICCommonState),
+        VMSTATE_INT64(next_time, APICCommonState),
+        VMSTATE_INT64(timer_expiry,
+                      APICCommonState), /* open-coded timer state */
+        VMSTATE_END_OF_LIST()
+    },
+    .subsections = (const VMStateDescription*[]) {
+        &vmstate_apic_common_sipi,
+        NULL
+    }
+};
+
+static Property apic_properties_common[] = {
+    DEFINE_PROP_UINT8("id", APICCommonState, id, -1),
+    DEFINE_PROP_UINT8("version", APICCommonState, version, 0x14),
+    DEFINE_PROP_BIT("vapic", APICCommonState, vapic_control, VAPIC_ENABLE_BIT,
+                    true),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void apic_common_class_init(ObjectClass *klass, void *data)
+{
+    ICCDeviceClass *idc = ICC_DEVICE_CLASS(klass);
+    DeviceClass *dc = DEVICE_CLASS(klass);
+
+    dc->vmsd = &vmstate_apic_common;
+    dc->reset = apic_reset_common;
+    dc->props = apic_properties_common;
+    idc->realize = apic_common_realize;
+    /*
+     * Reason: APIC and CPU need to be wired up by
+     * x86_cpu_apic_create()
+     */
+    dc->cannot_instantiate_with_device_add_yet = true;
+}
+
+static const TypeInfo apic_common_type = {
+    .name = TYPE_APIC_COMMON,
+    .parent = TYPE_ICC_DEVICE,
+    .instance_size = sizeof(APICCommonState),
+    .class_size = sizeof(APICCommonClass),
+    .class_init = apic_common_class_init,
+    .abstract = true,
+};
+
+static void apic_common_register_types(void)
+{
+    type_register_static(&apic_common_type);
+}
+
+type_init(apic_common_register_types)