Re: [PATCH v3 03/11] hw/acpi: Move AML building code for Generic Initiators to aml_build.c

[Igor Mammedov <imammedo@redhat.com>]

On Thu, 20 Jun 2024 17:03:11 +0100
Jonathan Cameron <Jonathan.Cameron@huawei.com> wrote:

> Rather than attempting to create a generic function with mess of the two
> different device handle types, use a PCI handle specific variant.  If the
> ACPI handle form is needed then that can be introduced alongside this
> with little duplicated code.
> 
> Drop the PCIDeviceHandle in favor of just passing the bus, devfn
> and segment directly.  devfn kept as a single byte because ARI means
> that in cases this is just an 8 bit function number.
> 
> Suggested-by: Igor Mammedov <imammedo@redhat.com>
> Link: https://lore.kernel.org/qemu-devel/20240618142333.102be976@imammedo.users.ipa.redhat.com/
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

with typo fixed

Reviewed-by: Igor Mammedov <imammedo@redhat.com>

> 
> ---
> v3: New patch based on Igor's comments on the endian fix.
> ---
>  include/hw/acpi/acpi_generic_initiator.h | 23 -------------
>  include/hw/acpi/aml-build.h              |  4 +++
>  hw/acpi/acpi_generic_initiator.c         | 39 ++-------------------
>  hw/acpi/aml-build.c                      | 44 ++++++++++++++++++++++++
>  4 files changed, 51 insertions(+), 59 deletions(-)
> 
> diff --git a/include/hw/acpi/acpi_generic_initiator.h b/include/hw/acpi/acpi_generic_initiator.h
> index a304bad73e..7b98676713 100644
> --- a/include/hw/acpi/acpi_generic_initiator.h
> +++ b/include/hw/acpi/acpi_generic_initiator.h
> @@ -19,29 +19,6 @@ typedef struct AcpiGenericInitiator {
>      uint16_t node;
>  } AcpiGenericInitiator;
>  
> -/*
> - * ACPI 6.3:
> - * Table 5-81 Flags – Generic Initiator Affinity Structure
> - */
> -typedef enum {
> -    /*
> -     * If clear, the OSPM ignores the contents of the Generic
> -     * Initiator/Port Affinity Structure. This allows system firmware
> -     * to populate the SRAT with a static number of structures, but only
> -     * enable them as necessary.
> -     */
> -    GEN_AFFINITY_ENABLED = (1 << 0),
> -} GenericAffinityFlags;
> -
> -/*
> - * ACPI 6.3:
> - * Table 5-80 Device Handle - PCI
> - */
> -typedef struct PCIDeviceHandle {
> -    uint16_t segment;
> -    uint16_t bdf;
> -} PCIDeviceHandle;
> -
>  void build_srat_generic_pci_initiator(GArray *table_data);
>  
>  #endif
> diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
> index a3784155cb..9ba3a21c13 100644
> --- a/include/hw/acpi/aml-build.h
> +++ b/include/hw/acpi/aml-build.h
> @@ -486,6 +486,10 @@ Aml *build_crs(PCIHostState *host, CrsRangeSet *range_set, uint32_t io_offset,
>  void build_srat_memory(GArray *table_data, uint64_t base,
>                         uint64_t len, int node, MemoryAffinityFlags flags);
>  
> +void build_srat_pci_generic_initiator(GArray * table_date, int node,

s/table_date/table_data/

> +                                      uint16_t segment, uint8_t bus,
> +                                      uint8_t devfn);
> +
>  void build_slit(GArray *table_data, BIOSLinker *linker, MachineState *ms,
>                  const char *oem_id, const char *oem_table_id);
>  
> diff --git a/hw/acpi/acpi_generic_initiator.c b/hw/acpi/acpi_generic_initiator.c
> index 4a02c19468..7665b16107 100644
> --- a/hw/acpi/acpi_generic_initiator.c
> +++ b/hw/acpi/acpi_generic_initiator.c
> @@ -74,40 +74,11 @@ static void acpi_generic_initiator_class_init(ObjectClass *oc, void *data)
>          acpi_generic_initiator_set_node, NULL, NULL);
>  }
>  
> -/*
> - * ACPI 6.3:
> - * Table 5-78 Generic Initiator Affinity Structure
> - */
> -static void
> -build_srat_generic_pci_initiator_affinity(GArray *table_data, int node,
> -                                          PCIDeviceHandle *handle)
> -{
> -    uint8_t index;
> -
> -    build_append_int_noprefix(table_data, 5, 1);  /* Type */
> -    build_append_int_noprefix(table_data, 32, 1); /* Length */
> -    build_append_int_noprefix(table_data, 0, 1);  /* Reserved */
> -    build_append_int_noprefix(table_data, 1, 1);  /* Device Handle Type: PCI */
> -    build_append_int_noprefix(table_data, node, 4);  /* Proximity Domain */
> -
> -    /* Device Handle - PCI */
> -    build_append_int_noprefix(table_data, handle->segment, 2);
> -    build_append_int_noprefix(table_data, PCI_BUS_NUM(handle->bdf), 1);
> -    build_append_int_noprefix(table_data, PCI_BDF_TO_DEVFN(handle->bdf), 1);
> -    for (index = 0; index < 12; index++) {
> -        build_append_int_noprefix(table_data, 0, 1);
> -    }
> -
> -    build_append_int_noprefix(table_data, GEN_AFFINITY_ENABLED, 4); /* Flags */
> -    build_append_int_noprefix(table_data, 0, 4);     /* Reserved */
> -}
> -
>  static int build_all_acpi_generic_initiators(Object *obj, void *opaque)
>  {
>      MachineState *ms = MACHINE(qdev_get_machine());
>      AcpiGenericInitiator *gi;
>      GArray *table_data = opaque;
> -    PCIDeviceHandle dev_handle;
>      PCIDevice *pci_dev;
>      Object *o;
>  
> @@ -130,13 +101,9 @@ static int build_all_acpi_generic_initiators(Object *obj, void *opaque)
>      }
>  
>      pci_dev = PCI_DEVICE(o);
> -
> -    dev_handle.segment = 0;
> -    dev_handle.bdf = PCI_BUILD_BDF(pci_bus_num(pci_get_bus(pci_dev)),
> -                                   pci_dev->devfn);
> -
> -    build_srat_generic_pci_initiator_affinity(table_data,
> -                                              gi->node, &dev_handle);
> +    build_srat_pci_generic_initiator(table_data, gi->node, 0,
> +                                     pci_bus_num(pci_get_bus(pci_dev)),
> +                                     pci_dev->devfn);
>  
>      return 0;
>  }
> diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
> index 6d4517cfbe..968b654e58 100644
> --- a/hw/acpi/aml-build.c
> +++ b/hw/acpi/aml-build.c
> @@ -1938,6 +1938,50 @@ void build_srat_memory(GArray *table_data, uint64_t base,
>      build_append_int_noprefix(table_data, 0, 8); /* Reserved */
>  }
>  
> +/*
> + * ACPI Spec Revision 6.3
> + * Table 5-80 Device Handle - PCI
> + */
> +static void build_append_srat_pci_device_handle(GArray *table_data,
> +                                                uint16_t segment,
> +                                                uint8_t bus, uint8_t devfn)
> +{
> +    /* PCI segment number */
> +    build_append_int_noprefix(table_data, segment, 2);
> +    /* PCI Bus Device Function */
> +    build_append_int_noprefix(table_data, bus, 1);
> +    build_append_int_noprefix(table_data, devfn, 1);
> +    /* Reserved */
> +    build_append_int_noprefix(table_data, 0, 12);
> +}
> +
> +/*
> + * ACPI spec, Revision 6.3
> + * 5.2.16.6 Generic Initiator Affinity Structure
> + *    With PCI Device Handle.
> + */
> +void build_srat_pci_generic_initiator(GArray *table_data, int node,
> +                                      uint16_t segment, uint8_t bus,
> +                                      uint8_t devfn)
> +{
> +    /* Type */
> +    build_append_int_noprefix(table_data, 5, 1);
> +    /* Length */
> +    build_append_int_noprefix(table_data, 32, 1);
> +    /* Reserved */
> +    build_append_int_noprefix(table_data, 0, 1);
> +    /* Device Handle Type: PCI */
> +    build_append_int_noprefix(table_data, 1, 1);
> +    /* Proximity Domain */
> +    build_append_int_noprefix(table_data, node, 4);
> +    /* Device Handle */
> +    build_append_srat_pci_device_handle(table_data, segment, bus, devfn);
> +    /* Flags - GI Enabled */
> +    build_append_int_noprefix(table_data, 1, 4);
> +    /* Reserved */
> +    build_append_int_noprefix(table_data, 0, 4);
> +}
> +
>  /*
>   * ACPI spec 5.2.17 System Locality Distance Information Table
>   * (Revision 2.0 or later)