Initial import of qemu-2.4.1HEADmaster

1 files changed, 293 insertions, 0 deletions

diff --git a/hw/intc/openpic_kvm.c b/hw/intc/openpic_kvm.c
new file mode 100644
index 00000000..f7cac585
--- /dev/null
+++ b/hw/intc/openpic_kvm.c
@@ -0,0 +1,293 @@
+/*
+ * KVM in-kernel OpenPIC
+ *
+ * Copyright 2013 Freescale Semiconductor, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <sys/ioctl.h>
+#include "exec/address-spaces.h"
+#include "hw/hw.h"
+#include "hw/ppc/openpic.h"
+#include "hw/pci/msi.h"
+#include "hw/sysbus.h"
+#include "sysemu/kvm.h"
+#include "qemu/log.h"
+
+#define GCR_RESET        0x80000000
+
+#define KVM_OPENPIC(obj) \
+    OBJECT_CHECK(KVMOpenPICState, (obj), TYPE_KVM_OPENPIC)
+
+typedef struct KVMOpenPICState {
+    /*< private >*/
+    SysBusDevice parent_obj;
+    /*< public >*/
+
+    MemoryRegion mem;
+    MemoryListener mem_listener;
+    uint32_t fd;
+    uint32_t model;
+    hwaddr mapped;
+} KVMOpenPICState;
+
+static void kvm_openpic_set_irq(void *opaque, int n_IRQ, int level)
+{
+    kvm_set_irq(kvm_state, n_IRQ, level);
+}
+
+static void kvm_openpic_write(void *opaque, hwaddr addr, uint64_t val,
+                              unsigned size)
+{
+    KVMOpenPICState *opp = opaque;
+    struct kvm_device_attr attr;
+    uint32_t val32 = val;
+    int ret;
+
+    attr.group = KVM_DEV_MPIC_GRP_REGISTER;
+    attr.attr = addr;
+    attr.addr = (uint64_t)(unsigned long)&val32;
+
+    ret = ioctl(opp->fd, KVM_SET_DEVICE_ATTR, &attr);
+    if (ret < 0) {
+        qemu_log_mask(LOG_UNIMP, "%s: %s %" PRIx64 "\n", __func__,
+                      strerror(errno), attr.attr);
+    }
+}
+
+static void kvm_openpic_reset(DeviceState *d)
+{
+    KVMOpenPICState *opp = KVM_OPENPIC(d);
+
+    /* Trigger the GCR.RESET bit to reset the PIC */
+    kvm_openpic_write(opp, 0x1020, GCR_RESET, sizeof(uint32_t));
+}
+
+static uint64_t kvm_openpic_read(void *opaque, hwaddr addr, unsigned size)
+{
+    KVMOpenPICState *opp = opaque;
+    struct kvm_device_attr attr;
+    uint32_t val = 0xdeadbeef;
+    int ret;
+
+    attr.group = KVM_DEV_MPIC_GRP_REGISTER;
+    attr.attr = addr;
+    attr.addr = (uint64_t)(unsigned long)&val;
+
+    ret = ioctl(opp->fd, KVM_GET_DEVICE_ATTR, &attr);
+    if (ret < 0) {
+        qemu_log_mask(LOG_UNIMP, "%s: %s %" PRIx64 "\n", __func__,
+                      strerror(errno), attr.attr);
+        return 0;
+    }
+
+    return val;
+}
+
+static const MemoryRegionOps kvm_openpic_mem_ops = {
+    .write = kvm_openpic_write,
+    .read  = kvm_openpic_read,
+    .endianness = DEVICE_BIG_ENDIAN,
+    .impl = {
+        .min_access_size = 4,
+        .max_access_size = 4,
+    },
+};
+
+static void kvm_openpic_region_add(MemoryListener *listener,
+                                   MemoryRegionSection *section)
+{
+    KVMOpenPICState *opp = container_of(listener, KVMOpenPICState,
+                                        mem_listener);
+    struct kvm_device_attr attr;
+    uint64_t reg_base;
+    int ret;
+
+    if (section->address_space != &address_space_memory) {
+        abort();
+    }
+
+    /* Ignore events on regions that are not us */
+    if (section->mr != &opp->mem) {
+        return;
+    }
+
+    if (opp->mapped) {
+        /*
+         * We can only map the MPIC once. Since we are already mapped,
+         * the best we can do is ignore new maps.
+         */
+        return;
+    }
+
+    reg_base = section->offset_within_address_space;
+    opp->mapped = reg_base;
+
+    attr.group = KVM_DEV_MPIC_GRP_MISC;
+    attr.attr = KVM_DEV_MPIC_BASE_ADDR;
+    attr.addr = (uint64_t)(unsigned long)&reg_base;
+
+    ret = ioctl(opp->fd, KVM_SET_DEVICE_ATTR, &attr);
+    if (ret < 0) {
+        fprintf(stderr, "%s: %s %" PRIx64 "\n", __func__,
+                strerror(errno), reg_base);
+    }
+}
+
+static void kvm_openpic_region_del(MemoryListener *listener,
+                                   MemoryRegionSection *section)
+{
+    KVMOpenPICState *opp = container_of(listener, KVMOpenPICState,
+                                        mem_listener);
+    struct kvm_device_attr attr;
+    uint64_t reg_base = 0;
+    int ret;
+
+    /* Ignore events on regions that are not us */
+    if (section->mr != &opp->mem) {
+        return;
+    }
+
+    if (section->offset_within_address_space != opp->mapped) {
+        /*
+         * We can only map the MPIC once. This mapping was a secondary
+         * one that we couldn't fulfill. Ignore it.
+         */
+        return;
+    }
+    opp->mapped = 0;
+
+    attr.group = KVM_DEV_MPIC_GRP_MISC;
+    attr.attr = KVM_DEV_MPIC_BASE_ADDR;
+    attr.addr = (uint64_t)(unsigned long)&reg_base;
+
+    ret = ioctl(opp->fd, KVM_SET_DEVICE_ATTR, &attr);
+    if (ret < 0) {
+        fprintf(stderr, "%s: %s %" PRIx64 "\n", __func__,
+                strerror(errno), reg_base);
+    }
+}
+
+static void kvm_openpic_init(Object *obj)
+{
+    KVMOpenPICState *opp = KVM_OPENPIC(obj);
+
+    memory_region_init_io(&opp->mem, OBJECT(opp), &kvm_openpic_mem_ops, opp,
+                          "kvm-openpic", 0x40000);
+}
+
+static void kvm_openpic_realize(DeviceState *dev, Error **errp)
+{
+    SysBusDevice *d = SYS_BUS_DEVICE(dev);
+    KVMOpenPICState *opp = KVM_OPENPIC(dev);
+    KVMState *s = kvm_state;
+    int kvm_openpic_model;
+    struct kvm_create_device cd = {0};
+    int ret, i;
+
+    if (!kvm_check_extension(s, KVM_CAP_DEVICE_CTRL)) {
+        error_setg(errp, "Kernel is lacking Device Control API");
+        return;
+    }
+
+    switch (opp->model) {
+    case OPENPIC_MODEL_FSL_MPIC_20:
+        kvm_openpic_model = KVM_DEV_TYPE_FSL_MPIC_20;
+        break;
+
+    case OPENPIC_MODEL_FSL_MPIC_42:
+        kvm_openpic_model = KVM_DEV_TYPE_FSL_MPIC_42;
+        break;
+
+    default:
+        error_setg(errp, "Unsupported OpenPIC model %" PRIu32, opp->model);
+        return;
+    }
+
+    cd.type = kvm_openpic_model;
+    ret = kvm_vm_ioctl(s, KVM_CREATE_DEVICE, &cd);
+    if (ret < 0) {
+        error_setg(errp, "Can't create device %d: %s",
+                   cd.type, strerror(errno));
+        return;
+    }
+    opp->fd = cd.fd;
+
+    sysbus_init_mmio(d, &opp->mem);
+    qdev_init_gpio_in(dev, kvm_openpic_set_irq, OPENPIC_MAX_IRQ);
+
+    opp->mem_listener.region_add = kvm_openpic_region_add;
+    opp->mem_listener.region_del = kvm_openpic_region_del;
+    memory_listener_register(&opp->mem_listener, &address_space_memory);
+
+    /* indicate pic capabilities */
+    msi_supported = true;
+    kvm_kernel_irqchip = true;
+    kvm_async_interrupts_allowed = true;
+
+    /* set up irq routing */
+    kvm_init_irq_routing(kvm_state);
+    for (i = 0; i < 256; ++i) {
+        kvm_irqchip_add_irq_route(kvm_state, i, 0, i);
+    }
+
+    kvm_msi_via_irqfd_allowed = true;
+    kvm_gsi_routing_allowed = true;
+
+    kvm_irqchip_commit_routes(s);
+}
+
+int kvm_openpic_connect_vcpu(DeviceState *d, CPUState *cs)
+{
+    KVMOpenPICState *opp = KVM_OPENPIC(d);
+
+    return kvm_vcpu_enable_cap(cs, KVM_CAP_IRQ_MPIC, 0, opp->fd,
+                               kvm_arch_vcpu_id(cs));
+}
+
+static Property kvm_openpic_properties[] = {
+    DEFINE_PROP_UINT32("model", KVMOpenPICState, model,
+                       OPENPIC_MODEL_FSL_MPIC_20),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void kvm_openpic_class_init(ObjectClass *oc, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(oc);
+
+    dc->realize = kvm_openpic_realize;
+    dc->props = kvm_openpic_properties;
+    dc->reset = kvm_openpic_reset;
+}
+
+static const TypeInfo kvm_openpic_info = {
+    .name          = TYPE_KVM_OPENPIC,
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(KVMOpenPICState),
+    .instance_init = kvm_openpic_init,
+    .class_init    = kvm_openpic_class_init,
+};
+
+static void kvm_openpic_register_types(void)
+{
+    type_register_static(&kvm_openpic_info);
+}
+
+type_init(kvm_openpic_register_types)