Re: [PATCH v3 06/22] acpi: create acpi-common.c and move madt code

["Philippe Mathieu-Daudé" <philmd@redhat.com>]

On 5/20/20 3:19 PM, Gerd Hoffmann wrote:
> We'll need madt support for microvm.
> 
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
> Reviewed-by: Igor Mammedov <imammedo@redhat.com>
> ---
>   hw/i386/acpi-common.h |  14 ++++
>   hw/i386/acpi-build.c  | 126 +---------------------------------
>   hw/i386/acpi-common.c | 152 ++++++++++++++++++++++++++++++++++++++++++
>   hw/i386/Makefile.objs |   1 +
>   4 files changed, 170 insertions(+), 123 deletions(-)
>   create mode 100644 hw/i386/acpi-common.h
>   create mode 100644 hw/i386/acpi-common.c
> 
> diff --git a/hw/i386/acpi-common.h b/hw/i386/acpi-common.h
> new file mode 100644
> index 000000000000..c30e461f1854
> --- /dev/null
> +++ b/hw/i386/acpi-common.h
> @@ -0,0 +1,14 @@
> +#ifndef HW_I386_ACPI_COMMON_H
> +#define HW_I386_ACPI_COMMON_H
> +#include "include/hw/acpi/acpi_dev_interface.h"
> +
> +#include "include/hw/acpi/bios-linker-loader.h"
> +#include "include/hw/i386/x86.h"
> +
> +/* Default IOAPIC ID */
> +#define ACPI_BUILD_IOAPIC_ID 0x0
> +
> +void acpi_build_madt(GArray *table_data, BIOSLinker *linker,
> +                     X86MachineState *x86ms, AcpiDeviceIf *adev);
> +
> +#endif
> diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
> index 4f6418d60b05..c0fdd539a640 100644
> --- a/hw/i386/acpi-build.c
> +++ b/hw/i386/acpi-build.c
> @@ -24,6 +24,7 @@
>   #include "qapi/error.h"
>   #include "qapi/qmp/qnum.h"
>   #include "acpi-build.h"
> +#include "acpi-common.h"
>   #include "qemu/bitmap.h"
>   #include "qemu/error-report.h"
>   #include "hw/pci/pci.h"
> @@ -89,9 +90,6 @@
>   #define ACPI_BUILD_DPRINTF(fmt, ...)
>   #endif
>   
> -/* Default IOAPIC ID */
> -#define ACPI_BUILD_IOAPIC_ID 0x0
> -
>   typedef struct AcpiPmInfo {
>       bool s3_disabled;
>       bool s4_disabled;
> @@ -327,124 +325,6 @@ build_facs(GArray *table_data)
>       facs->length = cpu_to_le32(sizeof(*facs));
>   }
>   
> -void pc_madt_cpu_entry(AcpiDeviceIf *adev, int uid,
> -                       const CPUArchIdList *apic_ids, GArray *entry)
> -{
> -    uint32_t apic_id = apic_ids->cpus[uid].arch_id;
> -
> -    /* ACPI spec says that LAPIC entry for non present
> -     * CPU may be omitted from MADT or it must be marked
> -     * as disabled. However omitting non present CPU from
> -     * MADT breaks hotplug on linux. So possible CPUs
> -     * should be put in MADT but kept disabled.
> -     */
> -    if (apic_id < 255) {
> -        AcpiMadtProcessorApic *apic = acpi_data_push(entry, sizeof *apic);
> -
> -        apic->type = ACPI_APIC_PROCESSOR;
> -        apic->length = sizeof(*apic);
> -        apic->processor_id = uid;
> -        apic->local_apic_id = apic_id;
> -        if (apic_ids->cpus[uid].cpu != NULL) {
> -            apic->flags = cpu_to_le32(1);
> -        } else {
> -            apic->flags = cpu_to_le32(0);
> -        }
> -    } else {
> -        AcpiMadtProcessorX2Apic *apic = acpi_data_push(entry, sizeof *apic);
> -
> -        apic->type = ACPI_APIC_LOCAL_X2APIC;
> -        apic->length = sizeof(*apic);
> -        apic->uid = cpu_to_le32(uid);
> -        apic->x2apic_id = cpu_to_le32(apic_id);
> -        if (apic_ids->cpus[uid].cpu != NULL) {
> -            apic->flags = cpu_to_le32(1);
> -        } else {
> -            apic->flags = cpu_to_le32(0);
> -        }
> -    }
> -}
> -
> -static void
> -build_madt(GArray *table_data, BIOSLinker *linker,
> -           X86MachineState *x86ms, AcpiDeviceIf *adev)
> -{
> -    MachineClass *mc = MACHINE_GET_CLASS(x86ms);
> -    const CPUArchIdList *apic_ids = mc->possible_cpu_arch_ids(MACHINE(x86ms));
> -    int madt_start = table_data->len;
> -    AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(adev);
> -    bool x2apic_mode = false;
> -
> -    AcpiMultipleApicTable *madt;
> -    AcpiMadtIoApic *io_apic;
> -    AcpiMadtIntsrcovr *intsrcovr;
> -    int i;
> -
> -    madt = acpi_data_push(table_data, sizeof *madt);
> -    madt->local_apic_address = cpu_to_le32(APIC_DEFAULT_ADDRESS);
> -    madt->flags = cpu_to_le32(1);
> -
> -    for (i = 0; i < apic_ids->len; i++) {
> -        adevc->madt_cpu(adev, i, apic_ids, table_data);
> -        if (apic_ids->cpus[i].arch_id > 254) {
> -            x2apic_mode = true;
> -        }
> -    }
> -
> -    io_apic = acpi_data_push(table_data, sizeof *io_apic);
> -    io_apic->type = ACPI_APIC_IO;
> -    io_apic->length = sizeof(*io_apic);
> -    io_apic->io_apic_id = ACPI_BUILD_IOAPIC_ID;
> -    io_apic->address = cpu_to_le32(IO_APIC_DEFAULT_ADDRESS);
> -    io_apic->interrupt = cpu_to_le32(0);
> -
> -    if (x86ms->apic_xrupt_override) {
> -        intsrcovr = acpi_data_push(table_data, sizeof *intsrcovr);
> -        intsrcovr->type   = ACPI_APIC_XRUPT_OVERRIDE;
> -        intsrcovr->length = sizeof(*intsrcovr);
> -        intsrcovr->source = 0;
> -        intsrcovr->gsi    = cpu_to_le32(2);
> -        intsrcovr->flags  = cpu_to_le16(0); /* conforms to bus specifications */
> -    }
> -    for (i = 1; i < 16; i++) {
> -#define ACPI_BUILD_PCI_IRQS ((1<<5) | (1<<9) | (1<<10) | (1<<11))
> -        if (!(ACPI_BUILD_PCI_IRQS & (1 << i))) {
> -            /* No need for a INT source override structure. */
> -            continue;
> -        }
> -        intsrcovr = acpi_data_push(table_data, sizeof *intsrcovr);
> -        intsrcovr->type   = ACPI_APIC_XRUPT_OVERRIDE;
> -        intsrcovr->length = sizeof(*intsrcovr);
> -        intsrcovr->source = i;
> -        intsrcovr->gsi    = cpu_to_le32(i);
> -        intsrcovr->flags  = cpu_to_le16(0xd); /* active high, level triggered */
> -    }
> -
> -    if (x2apic_mode) {
> -        AcpiMadtLocalX2ApicNmi *local_nmi;
> -
> -        local_nmi = acpi_data_push(table_data, sizeof *local_nmi);
> -        local_nmi->type   = ACPI_APIC_LOCAL_X2APIC_NMI;
> -        local_nmi->length = sizeof(*local_nmi);
> -        local_nmi->uid    = 0xFFFFFFFF; /* all processors */
> -        local_nmi->flags  = cpu_to_le16(0);
> -        local_nmi->lint   = 1; /* ACPI_LINT1 */
> -    } else {
> -        AcpiMadtLocalNmi *local_nmi;
> -
> -        local_nmi = acpi_data_push(table_data, sizeof *local_nmi);
> -        local_nmi->type         = ACPI_APIC_LOCAL_NMI;
> -        local_nmi->length       = sizeof(*local_nmi);
> -        local_nmi->processor_id = 0xff; /* all processors */
> -        local_nmi->flags        = cpu_to_le16(0);
> -        local_nmi->lint         = 1; /* ACPI_LINT1 */
> -    }
> -
> -    build_header(linker, table_data,
> -                 (void *)(table_data->data + madt_start), "APIC",
> -                 table_data->len - madt_start, 1, NULL, NULL);
> -}
> -
>   static void build_append_pcihp_notify_entry(Aml *method, int slot)
>   {
>       Aml *if_ctx;
> @@ -2533,8 +2413,8 @@ void acpi_build(AcpiBuildTables *tables, MachineState *machine)
>       aml_len += tables_blob->len - fadt;
>   
>       acpi_add_table(table_offsets, tables_blob);
> -    build_madt(tables_blob, tables->linker, x86ms,
> -               ACPI_DEVICE_IF(pcms->acpi_dev));
> +    acpi_build_madt(tables_blob, tables->linker, x86ms,
> +                    ACPI_DEVICE_IF(pcms->acpi_dev));
>   
>       vmgenid_dev = find_vmgenid_dev();
>       if (vmgenid_dev) {
> diff --git a/hw/i386/acpi-common.c b/hw/i386/acpi-common.c
> new file mode 100644
> index 000000000000..5caca16a0b59
> --- /dev/null
> +++ b/hw/i386/acpi-common.c
> @@ -0,0 +1,152 @@
> +/* Support for generating ACPI tables and passing them to Guests
> + *
> + * Copyright (C) 2008-2010  Kevin O'Connor <kevin@koconnor.net>
> + * Copyright (C) 2006 Fabrice Bellard
> + * Copyright (C) 2013 Red Hat Inc
> + *
> + * Author: Michael S. Tsirkin <mst@redhat.com>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> +
> + * This program 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 General Public License for more details.
> +
> + * You should have received a copy of the GNU General Public License along
> + * with this program; if not, see <http://www.gnu.org/licenses/>.
> + */
> +
> +#include "qemu/osdep.h"
> +#include "qapi/error.h"
> +
> +#include "exec/memory.h"
> +#include "hw/acpi/acpi.h"
> +#include "hw/acpi/aml-build.h"
> +#include "hw/acpi/utils.h"
> +#include "hw/i386/pc.h"
> +#include "target/i386/cpu.h"
> +
> +#include "acpi-build.h"
> +#include "acpi-common.h"
> +
> +void pc_madt_cpu_entry(AcpiDeviceIf *adev, int uid,
> +                       const CPUArchIdList *apic_ids, GArray *entry)
> +{
> +    uint32_t apic_id = apic_ids->cpus[uid].arch_id;
> +
> +    /* ACPI spec says that LAPIC entry for non present
> +     * CPU may be omitted from MADT or it must be marked
> +     * as disabled. However omitting non present CPU from
> +     * MADT breaks hotplug on linux. So possible CPUs
> +     * should be put in MADT but kept disabled.
> +     */
> +    if (apic_id < 255) {
> +        AcpiMadtProcessorApic *apic = acpi_data_push(entry, sizeof *apic);
> +
> +        apic->type = ACPI_APIC_PROCESSOR;
> +        apic->length = sizeof(*apic);
> +        apic->processor_id = uid;
> +        apic->local_apic_id = apic_id;
> +        if (apic_ids->cpus[uid].cpu != NULL) {
> +            apic->flags = cpu_to_le32(1);
> +        } else {
> +            apic->flags = cpu_to_le32(0);
> +        }
> +    } else {
> +        AcpiMadtProcessorX2Apic *apic = acpi_data_push(entry, sizeof *apic);
> +
> +        apic->type = ACPI_APIC_LOCAL_X2APIC;
> +        apic->length = sizeof(*apic);
> +        apic->uid = cpu_to_le32(uid);
> +        apic->x2apic_id = cpu_to_le32(apic_id);
> +        if (apic_ids->cpus[uid].cpu != NULL) {
> +            apic->flags = cpu_to_le32(1);
> +        } else {
> +            apic->flags = cpu_to_le32(0);
> +        }
> +    }
> +}
> +
> +void acpi_build_madt(GArray *table_data, BIOSLinker *linker,
> +                     X86MachineState *x86ms, AcpiDeviceIf *adev)
> +{
> +    MachineClass *mc = MACHINE_GET_CLASS(x86ms);
> +    const CPUArchIdList *apic_ids = mc->possible_cpu_arch_ids(MACHINE(x86ms));
> +    int madt_start = table_data->len;
> +    AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(adev);
> +    bool x2apic_mode = false;
> +
> +    AcpiMultipleApicTable *madt;
> +    AcpiMadtIoApic *io_apic;
> +    AcpiMadtIntsrcovr *intsrcovr;
> +    int i;
> +
> +    madt = acpi_data_push(table_data, sizeof *madt);
> +    madt->local_apic_address = cpu_to_le32(APIC_DEFAULT_ADDRESS);
> +    madt->flags = cpu_to_le32(1);
> +
> +    for (i = 0; i < apic_ids->len; i++) {
> +        adevc->madt_cpu(adev, i, apic_ids, table_data);
> +        if (apic_ids->cpus[i].arch_id > 254) {
> +            x2apic_mode = true;
> +        }
> +    }
> +
> +    io_apic = acpi_data_push(table_data, sizeof *io_apic);
> +    io_apic->type = ACPI_APIC_IO;
> +    io_apic->length = sizeof(*io_apic);
> +    io_apic->io_apic_id = ACPI_BUILD_IOAPIC_ID;
> +    io_apic->address = cpu_to_le32(IO_APIC_DEFAULT_ADDRESS);
> +    io_apic->interrupt = cpu_to_le32(0);
> +
> +    if (x86ms->apic_xrupt_override) {
> +        intsrcovr = acpi_data_push(table_data, sizeof *intsrcovr);
> +        intsrcovr->type   = ACPI_APIC_XRUPT_OVERRIDE;
> +        intsrcovr->length = sizeof(*intsrcovr);
> +        intsrcovr->source = 0;
> +        intsrcovr->gsi    = cpu_to_le32(2);
> +        intsrcovr->flags  = cpu_to_le16(0); /* conforms to bus specifications */
> +    }
> +    for (i = 1; i < 16; i++) {
> +#define ACPI_BUILD_PCI_IRQS ((1<<5) | (1<<9) | (1<<10) | (1<<11))
> +        if (!(ACPI_BUILD_PCI_IRQS & (1 << i))) {
> +            /* No need for a INT source override structure. */
> +            continue;
> +        }
> +        intsrcovr = acpi_data_push(table_data, sizeof *intsrcovr);
> +        intsrcovr->type   = ACPI_APIC_XRUPT_OVERRIDE;
> +        intsrcovr->length = sizeof(*intsrcovr);
> +        intsrcovr->source = i;
> +        intsrcovr->gsi    = cpu_to_le32(i);
> +        intsrcovr->flags  = cpu_to_le16(0xd); /* active high, level triggered */
> +    }
> +
> +    if (x2apic_mode) {
> +        AcpiMadtLocalX2ApicNmi *local_nmi;
> +
> +        local_nmi = acpi_data_push(table_data, sizeof *local_nmi);
> +        local_nmi->type   = ACPI_APIC_LOCAL_X2APIC_NMI;
> +        local_nmi->length = sizeof(*local_nmi);
> +        local_nmi->uid    = 0xFFFFFFFF; /* all processors */
> +        local_nmi->flags  = cpu_to_le16(0);
> +        local_nmi->lint   = 1; /* ACPI_LINT1 */
> +    } else {
> +        AcpiMadtLocalNmi *local_nmi;
> +
> +        local_nmi = acpi_data_push(table_data, sizeof *local_nmi);
> +        local_nmi->type         = ACPI_APIC_LOCAL_NMI;
> +        local_nmi->length       = sizeof(*local_nmi);
> +        local_nmi->processor_id = 0xff; /* all processors */
> +        local_nmi->flags        = cpu_to_le16(0);
> +        local_nmi->lint         = 1; /* ACPI_LINT1 */
> +    }
> +
> +    build_header(linker, table_data,
> +                 (void *)(table_data->data + madt_start), "APIC",
> +                 table_data->len - madt_start, 1, NULL, NULL);
> +}
> +
> diff --git a/hw/i386/Makefile.objs b/hw/i386/Makefile.objs
> index 8ce1b265335b..6abc74551a72 100644
> --- a/hw/i386/Makefile.objs
> +++ b/hw/i386/Makefile.objs
> @@ -16,4 +16,5 @@ obj-$(CONFIG_VMMOUSE) += vmmouse.o
>   obj-$(CONFIG_PC) += port92.o
>   
>   obj-y += kvmvapic.o
> +obj-$(CONFIG_ACPI) += acpi-common.o
>   obj-$(CONFIG_PC) += acpi-build.o
> 

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>