コード例 #1
0
static int vioapic_range(struct vcpu *v, unsigned long addr)
{
    struct hvm_hw_vioapic *vioapic = domain_vioapic(v->domain);

    return ((addr >= vioapic->base_address &&
             (addr < vioapic->base_address + VIOAPIC_MEM_LENGTH)));
}
コード例 #2
0
static unsigned long vioapic_read(struct vcpu *v,
                                  unsigned long addr,
                                  unsigned long length)
{
    struct hvm_hw_vioapic *vioapic = domain_vioapic(v->domain);
    uint32_t result;

    HVM_DBG_LOG(DBG_LEVEL_IOAPIC, "addr %lx", addr);

    addr &= 0xff;

    switch ( addr )
    {
    case VIOAPIC_REG_SELECT:
        result = vioapic->ioregsel;
        break;

    case VIOAPIC_REG_WINDOW:
        result = vioapic_read_indirect(vioapic, addr, length);
        break;

    default:
        result = 0;
        break;
    }

    return result;
}
コード例 #3
0
static void vioapic_write(struct vcpu *v,
                          unsigned long addr,
                          unsigned long length,
                          unsigned long val)
{
    struct hvm_hw_vioapic *vioapic = domain_vioapic(v->domain);

    addr &= 0xff;

    switch ( addr )
    {
    case VIOAPIC_REG_SELECT:
        vioapic->ioregsel = val;
        break;

    case VIOAPIC_REG_WINDOW:
        vioapic_write_indirect(vioapic, addr, length, val);
        break;

#if VIOAPIC_IS_IOSAPIC
    case VIOAPIC_REG_EOI:
        vioapic_update_EOI(v->domain, val);
        break;
#endif

    default:
        break;
    }
}
コード例 #4
0
ファイル: dom0_build.c プロジェクト: mirage/xen
static int __init pvh_setup_acpi_madt(struct domain *d, paddr_t *addr)
{
    struct acpi_table_madt *madt;
    struct acpi_table_header *table;
    struct acpi_madt_io_apic *io_apic;
    struct acpi_madt_local_x2apic *x2apic;
    acpi_status status;
    unsigned long size;
    unsigned int i, max_vcpus;
    int rc;

    /* Count number of interrupt overrides in the MADT. */
    acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE,
                          acpi_count_intr_ovr, UINT_MAX);

    /* Count number of NMI sources in the MADT. */
    acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_count_nmi_src,
                          UINT_MAX);

    max_vcpus = dom0_max_vcpus();
    /* Calculate the size of the crafted MADT. */
    size = sizeof(*madt);
    size += sizeof(*io_apic) * nr_ioapics;
    size += sizeof(*intsrcovr) * acpi_intr_overrides;
    size += sizeof(*nmisrc) * acpi_nmi_sources;
    size += sizeof(*x2apic) * max_vcpus;

    madt = xzalloc_bytes(size);
    if ( !madt )
    {
        printk("Unable to allocate memory for MADT table\n");
        rc = -ENOMEM;
        goto out;
    }

    /* Copy the native MADT table header. */
    status = acpi_get_table(ACPI_SIG_MADT, 0, &table);
    if ( !ACPI_SUCCESS(status) )
    {
        printk("Failed to get MADT ACPI table, aborting.\n");
        rc = -EINVAL;
        goto out;
    }
    madt->header = *table;
    madt->address = APIC_DEFAULT_PHYS_BASE;
    /*
     * NB: this is currently set to 4, which is the revision in the ACPI
     * spec 6.1. Sadly ACPICA doesn't provide revision numbers for the
     * tables described in the headers.
     */
    madt->header.revision = min_t(unsigned char, table->revision, 4);

    /* Setup the IO APIC entries. */
    io_apic = (void *)(madt + 1);
    for ( i = 0; i < nr_ioapics; i++ )
    {
        io_apic->header.type = ACPI_MADT_TYPE_IO_APIC;
        io_apic->header.length = sizeof(*io_apic);
        io_apic->id = domain_vioapic(d, i)->id;
        io_apic->address = domain_vioapic(d, i)->base_address;
        io_apic->global_irq_base = domain_vioapic(d, i)->base_gsi;
        io_apic++;
    }

    x2apic = (void *)io_apic;
    for ( i = 0; i < max_vcpus; i++ )
    {
        x2apic->header.type = ACPI_MADT_TYPE_LOCAL_X2APIC;
        x2apic->header.length = sizeof(*x2apic);
        x2apic->uid = i;
        x2apic->local_apic_id = i * 2;
        x2apic->lapic_flags = ACPI_MADT_ENABLED;
        x2apic++;
    }

    /* Setup interrupt overrides. */
    intsrcovr = (void *)x2apic;
    acpi_table_parse_madt(ACPI_MADT_TYPE_INTERRUPT_OVERRIDE, acpi_set_intr_ovr,
                          acpi_intr_overrides);

    /* Setup NMI sources. */
    nmisrc = (void *)intsrcovr;
    acpi_table_parse_madt(ACPI_MADT_TYPE_NMI_SOURCE, acpi_set_nmi_src,
                          acpi_nmi_sources);

    ASSERT(((void *)nmisrc - (void *)madt) == size);
    madt->header.length = size;
    /*
     * Calling acpi_tb_checksum here is a layering violation, but
     * introducing a wrapper for such simple usage seems overkill.
     */
    madt->header.checksum -= acpi_tb_checksum(ACPI_CAST_PTR(u8, madt), size);

    /* Place the new MADT in guest memory space. */
    if ( pvh_steal_ram(d, size, 0, GB(4), addr) )
    {
        printk("Unable to find allocate guest RAM for MADT\n");
        rc = -ENOMEM;
        goto out;
    }

    /* Mark this region as E820_ACPI. */
    if ( pvh_add_mem_range(d, *addr, *addr + size, E820_ACPI) )
        printk("Unable to add MADT region to memory map\n");

    rc = hvm_copy_to_guest_phys(*addr, madt, size, d->vcpu[0]);
    if ( rc )
    {
        printk("Unable to copy MADT into guest memory\n");
        goto out;
    }

    rc = 0;

 out:
    xfree(madt);

    return rc;
}