Re: [PATCH v3 17/35] acpi: use build_append_int_noprefix() API to compose SRAT table

[Eric Auger <eauger@redhat.com>]

On 9/7/21 4:47 PM, Igor Mammedov wrote:
> Drop usage of packed structures and explicit endian conversions
> when building SRAT tables for arm/x86 and use endian agnostic
> build_append_int_noprefix() API to build it.
> 
> Signed-off-by: Igor Mammedov <imammedo@redhat.com>
> ---
> v3:
>  * rebase on top of (e77af21a7a2 hw/i386/acpi-build: Get NUMA information from struct NumaState)
> CC: xiaoguangrong.eric@gmail.com
> CC: shannon.zhaosl@gmail.com
> CC: peter.maydell@linaro.org
> CC: marcel.apfelbaum@gmail.com
> CC: qemu-arm@nongnu.org
> CC: drjones@redhat.com
> CC: eauger@redhat.com
> ---
>  include/hw/acpi/acpi-defs.h | 49 -----------------------
>  include/hw/acpi/aml-build.h |  2 +-
>  hw/acpi/aml-build.c         | 24 ++++++++----
>  hw/acpi/nvdimm.c            |  4 +-
>  hw/arm/virt-acpi-build.c    | 29 ++++++++------
>  hw/i386/acpi-build.c        | 78 +++++++++++++++++++++----------------
>  6 files changed, 80 insertions(+), 106 deletions(-)
> 
> diff --git a/include/hw/acpi/acpi-defs.h b/include/hw/acpi/acpi-defs.h
> index 5826ee04b6..d293304f9c 100644
> --- a/include/hw/acpi/acpi-defs.h
> +++ b/include/hw/acpi/acpi-defs.h
> @@ -358,55 +358,6 @@ struct AcpiGenericTimerTable {
>  } QEMU_PACKED;
>  typedef struct AcpiGenericTimerTable AcpiGenericTimerTable;
>  
> -#define ACPI_SRAT_PROCESSOR_APIC     0
> -#define ACPI_SRAT_MEMORY             1
> -#define ACPI_SRAT_PROCESSOR_x2APIC   2
> -#define ACPI_SRAT_PROCESSOR_GICC     3
> -
> -struct AcpiSratProcessorAffinity {
> -    ACPI_SUB_HEADER_DEF
> -    uint8_t     proximity_lo;
> -    uint8_t     local_apic_id;
> -    uint32_t    flags;
> -    uint8_t     local_sapic_eid;
> -    uint8_t     proximity_hi[3];
> -    uint32_t    reserved;
> -} QEMU_PACKED;
> -typedef struct AcpiSratProcessorAffinity AcpiSratProcessorAffinity;
> -
> -struct AcpiSratProcessorX2ApicAffinity {
> -    ACPI_SUB_HEADER_DEF
> -    uint16_t    reserved;
> -    uint32_t    proximity_domain;
> -    uint32_t    x2apic_id;
> -    uint32_t    flags;
> -    uint32_t    clk_domain;
> -    uint32_t    reserved2;
> -} QEMU_PACKED;
> -typedef struct AcpiSratProcessorX2ApicAffinity AcpiSratProcessorX2ApicAffinity;
> -
> -struct AcpiSratMemoryAffinity {
> -    ACPI_SUB_HEADER_DEF
> -    uint32_t    proximity;
> -    uint16_t    reserved1;
> -    uint64_t    base_addr;
> -    uint64_t    range_length;
> -    uint32_t    reserved2;
> -    uint32_t    flags;
> -    uint32_t    reserved3[2];
> -} QEMU_PACKED;
> -typedef struct AcpiSratMemoryAffinity AcpiSratMemoryAffinity;
> -
> -struct AcpiSratProcessorGiccAffinity {
> -    ACPI_SUB_HEADER_DEF
> -    uint32_t    proximity;
> -    uint32_t    acpi_processor_uid;
> -    uint32_t    flags;
> -    uint32_t    clock_domain;
> -} QEMU_PACKED;
> -
> -typedef struct AcpiSratProcessorGiccAffinity AcpiSratProcessorGiccAffinity;
> -
>  /* DMAR - DMA Remapping table r2.2 */
>  struct AcpiTableDmar {
>      ACPI_TABLE_HEADER_DEF
> diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
> index 4242382399..6e1f42e119 100644
> --- a/include/hw/acpi/aml-build.h
> +++ b/include/hw/acpi/aml-build.h
> @@ -487,7 +487,7 @@ Aml *build_crs(PCIHostState *host, CrsRangeSet *range_set, uint32_t io_offset,
>                 uint32_t mmio32_offset, uint64_t mmio64_offset,
>                 uint16_t bus_nr_offset);
>  
> -void build_srat_memory(AcpiSratMemoryAffinity *numamem, uint64_t base,
> +void build_srat_memory(GArray *table_data, uint64_t base,
>                         uint64_t len, int node, MemoryAffinityFlags flags);
>  
>  void build_slit(GArray *table_data, BIOSLinker *linker, MachineState *ms,
> diff --git a/hw/acpi/aml-build.c b/hw/acpi/aml-build.c
> index 5e8bfb631c..050fdb3f37 100644
> --- a/hw/acpi/aml-build.c
> +++ b/hw/acpi/aml-build.c
> @@ -1936,15 +1936,25 @@ build_xsdt(GArray *table_data, BIOSLinker *linker, GArray *table_offsets,
>      acpi_table_end(linker, &table);
>  }
>  
> -void build_srat_memory(AcpiSratMemoryAffinity *numamem, uint64_t base,
> +/*
> + * ACPI spec, Revision 4.0
> + * 5.2.16.2 Memory Affinity Structure
> + */
> +void build_srat_memory(GArray *table_data, uint64_t base,
>                         uint64_t len, int node, MemoryAffinityFlags flags)
>  {
> -    numamem->type = ACPI_SRAT_MEMORY;
> -    numamem->length = sizeof(*numamem);
> -    numamem->proximity = cpu_to_le32(node);
> -    numamem->flags = cpu_to_le32(flags);
> -    numamem->base_addr = cpu_to_le64(base);
> -    numamem->range_length = cpu_to_le64(len);
> +    build_append_int_noprefix(table_data, 1, 1); /* Type */
> +    build_append_int_noprefix(table_data, 40, 1); /* Length */
> +    build_append_int_noprefix(table_data, node, 4); /* Proximity Domain */
> +    build_append_int_noprefix(table_data, 0, 2); /* Reserved */
> +    build_append_int_noprefix(table_data, base, 4); /* Base Address Low */
> +    /* Base Address High */
> +    build_append_int_noprefix(table_data, base >> 32, 4);
> +    build_append_int_noprefix(table_data, len, 4); /* Length Low */
> +    build_append_int_noprefix(table_data, len >> 32, 4); /* Length High */
> +    build_append_int_noprefix(table_data, 0, 4); /* Reserved */
> +    build_append_int_noprefix(table_data, flags, 4); /* Flags */
> +    build_append_int_noprefix(table_data, 0, 8); /* Reserved */
>  }
>  
>  /*
> diff --git a/hw/acpi/nvdimm.c b/hw/acpi/nvdimm.c
> index e050b47c2b..baab81f7a6 100644
> --- a/hw/acpi/nvdimm.c
> +++ b/hw/acpi/nvdimm.c
> @@ -1336,7 +1336,6 @@ void nvdimm_build_srat(GArray *table_data)
>      GSList *device_list = nvdimm_get_device_list();
>  
>      for (; device_list; device_list = device_list->next) {
> -        AcpiSratMemoryAffinity *numamem = NULL;
>          DeviceState *dev = device_list->data;
>          Object *obj = OBJECT(dev);
>          uint64_t addr, size;
> @@ -1346,8 +1345,7 @@ void nvdimm_build_srat(GArray *table_data)
>          addr = object_property_get_uint(obj, PC_DIMM_ADDR_PROP, &error_abort);
>          size = object_property_get_uint(obj, PC_DIMM_SIZE_PROP, &error_abort);
>  
> -        numamem = acpi_data_push(table_data, sizeof *numamem);
> -        build_srat_memory(numamem, addr, size, node,
> +        build_srat_memory(table_data, addr, size, node,
>                            MEM_AFFINITY_ENABLED | MEM_AFFINITY_NON_VOLATILE);
>      }
>      g_slist_free(device_list);
> diff --git a/hw/arm/virt-acpi-build.c b/hw/arm/virt-acpi-build.c
> index 21efe7fe34..6ba02cf281 100644
> --- a/hw/arm/virt-acpi-build.c
> +++ b/hw/arm/virt-acpi-build.c
> @@ -474,11 +474,13 @@ build_spcr(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
>                   vms->oem_table_id);
>  }
>  
> +/*
> + * ACPI spec, Revision 5.1
> + * 5.2.16 System Resource Affinity Table (SRAT)
> + */
>  static void
>  build_srat(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
>  {
> -    AcpiSratProcessorGiccAffinity *core;
> -    AcpiSratMemoryAffinity *numamem;
>      int i;
>      uint64_t mem_base;
>      MachineClass *mc = MACHINE_GET_CLASS(vms);
> @@ -492,19 +494,23 @@ build_srat(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
>      build_append_int_noprefix(table_data, 0, 8); /* Reserved */
>  
>      for (i = 0; i < cpu_list->len; ++i) {
> -        core = acpi_data_push(table_data, sizeof(*core));
> -        core->type = ACPI_SRAT_PROCESSOR_GICC;
> -        core->length = sizeof(*core);
> -        core->proximity = cpu_to_le32(cpu_list->cpus[i].props.node_id);
> -        core->acpi_processor_uid = cpu_to_le32(i);
> -        core->flags = cpu_to_le32(1);
> +        uint32_t nodeid = cpu_list->cpus[i].props.node_id;
> +        /*
> +         * 5.2.16.4 GICC Affinity Structure
> +         */
> +        build_append_int_noprefix(table_data, 3, 1);      /* Type */
> +        build_append_int_noprefix(table_data, 18, 1);     /* Length */
> +        build_append_int_noprefix(table_data, nodeid, 4); /* Proximity Domain */
> +        build_append_int_noprefix(table_data, i, 4); /* ACPI Processor UID */
> +        /* Flags, Table 5-76 */
> +        build_append_int_noprefix(table_data, 1 /* Enabled */, 4);
> +        build_append_int_noprefix(table_data, 0, 4); /* Clock Domain */
>      }
>  
>      mem_base = vms->memmap[VIRT_MEM].base;
>      for (i = 0; i < ms->numa_state->num_nodes; ++i) {
>          if (ms->numa_state->nodes[i].node_mem > 0) {
> -            numamem = acpi_data_push(table_data, sizeof(*numamem));
> -            build_srat_memory(numamem, mem_base,
> +            build_srat_memory(table_data, mem_base,
>                                ms->numa_state->nodes[i].node_mem, i,
>                                MEM_AFFINITY_ENABLED);
>              mem_base += ms->numa_state->nodes[i].node_mem;
> @@ -516,8 +522,7 @@ build_srat(GArray *table_data, BIOSLinker *linker, VirtMachineState *vms)
>      }
>  
>      if (ms->device_memory) {
> -        numamem = acpi_data_push(table_data, sizeof *numamem);
> -        build_srat_memory(numamem, ms->device_memory->base,
> +        build_srat_memory(table_data, ms->device_memory->base,
>                            memory_region_size(&ms->device_memory->mr),
>                            ms->numa_state->num_nodes - 1,
>                            MEM_AFFINITY_HOTPLUGGABLE | MEM_AFFINITY_ENABLED);
> diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
> index 41c0a63b30..51e0ba07b6 100644
> --- a/hw/i386/acpi-build.c
> +++ b/hw/i386/acpi-build.c
> @@ -1917,13 +1917,15 @@ build_tpm_tcpa(GArray *table_data, BIOSLinker *linker, GArray *tcpalog,
>  #define HOLE_640K_START  (640 * KiB)
>  #define HOLE_640K_END   (1 * MiB)
>  
> +/*
> + * ACPI spec, Revision 3.0
> + * 5.2.15 System Resource Affinity Table (SRAT)
> + */
>  static void
>  build_srat(GArray *table_data, BIOSLinker *linker, MachineState *machine)
>  {
> -    AcpiSratMemoryAffinity *numamem;
> -
>      int i;
> -    int numa_start, slots;
> +    int numa_mem_start, slots;
>      uint64_t mem_len, mem_base, next_base;
>      MachineClass *mc = MACHINE_GET_CLASS(machine);
>      X86MachineState *x86ms = X86_MACHINE(machine);
> @@ -1946,34 +1948,41 @@ build_srat(GArray *table_data, BIOSLinker *linker, MachineState *machine)
>          uint32_t apic_id = apic_ids->cpus[i].arch_id;
>  
>          if (apic_id < 255) {
> -            AcpiSratProcessorAffinity *core;
> -
> -            core = acpi_data_push(table_data, sizeof *core);
> -            core->type = ACPI_SRAT_PROCESSOR_APIC;
> -            core->length = sizeof(*core);
> -            core->local_apic_id = apic_id;
> -            core->proximity_lo = node_id;
> -            memset(core->proximity_hi, 0, 3);
> -            core->local_sapic_eid = 0;
> -            core->flags = cpu_to_le32(1);
> +            /* 5.2.15.1 Processor Local APIC/SAPIC Affinity Structure */
> +            build_append_int_noprefix(table_data, 0, 1);  /* Type  */
> +            build_append_int_noprefix(table_data, 16, 1); /* Length */
> +            /* Proximity Domain [7:0] */
> +            build_append_int_noprefix(table_data, node_id, 1);
> +            build_append_int_noprefix(table_data, apic_id, 1); /* APIC ID */
> +            /* Flags, Table 5-36 */
> +            build_append_int_noprefix(table_data, 1, 4);
> +            build_append_int_noprefix(table_data, 0, 1); /* Local SAPIC EID */
> +            /* Proximity Domain [31:8] */
> +            build_append_int_noprefix(table_data, 0, 3);
> +            build_append_int_noprefix(table_data, 0, 4); /* Reserved */
clock domain?
>          } else {
> -            AcpiSratProcessorX2ApicAffinity *core;
> -
> -            core = acpi_data_push(table_data, sizeof *core);
> -            core->type = ACPI_SRAT_PROCESSOR_x2APIC;
> -            core->length = sizeof(*core);
> -            core->x2apic_id = cpu_to_le32(apic_id);
> -            core->proximity_domain = cpu_to_le32(node_id);
> -            core->flags = cpu_to_le32(1);
> +            /*
> +             * ACPI spec, Revision 4.0
> +             * 5.2.16.3 Processor Local x2APIC Affinity Structure
> +             */
> +            build_append_int_noprefix(table_data, 2, 1);  /* Type  */
> +            build_append_int_noprefix(table_data, 24, 1); /* Length */
> +            build_append_int_noprefix(table_data, 0, 2); /* Reserved */
> +            /* Proximity Domain */
> +            build_append_int_noprefix(table_data, node_id, 4);
> +            build_append_int_noprefix(table_data, apic_id, 4); /* X2APIC ID */
> +            /* Flags, Table 5-39 */
> +            build_append_int_noprefix(table_data, 1 /* Enabled */, 4);
> +            build_append_int_noprefix(table_data, 0, 4); /* Clock Domain */
> +            build_append_int_noprefix(table_data, 0, 4); /* Reserved */
>          }
>      }
>  
> -
>      /* the memory map is a bit tricky, it contains at least one hole
>       * from 640k-1M and possibly another one from 3.5G-4G.
>       */
>      next_base = 0;
> -    numa_start = table_data->len;
> +    numa_mem_start = table_data->len;
>  
>      for (i = 1; i < nb_numa_nodes + 1; ++i) {
>          mem_base = next_base;
> @@ -1985,8 +1994,7 @@ build_srat(GArray *table_data, BIOSLinker *linker, MachineState *machine)
>              next_base > HOLE_640K_START) {
>              mem_len -= next_base - HOLE_640K_START;
>              if (mem_len > 0) {
> -                numamem = acpi_data_push(table_data, sizeof *numamem);
> -                build_srat_memory(numamem, mem_base, mem_len, i - 1,
> +                build_srat_memory(table_data, mem_base, mem_len, i - 1,
>                                    MEM_AFFINITY_ENABLED);
>              }
>  
> @@ -2004,8 +2012,7 @@ build_srat(GArray *table_data, BIOSLinker *linker, MachineState *machine)
>              next_base > x86ms->below_4g_mem_size) {
>              mem_len -= next_base - x86ms->below_4g_mem_size;
>              if (mem_len > 0) {
> -                numamem = acpi_data_push(table_data, sizeof *numamem);
> -                build_srat_memory(numamem, mem_base, mem_len, i - 1,
> +                build_srat_memory(table_data, mem_base, mem_len, i - 1,
>                                    MEM_AFFINITY_ENABLED);
>              }
>              mem_base = 1ULL << 32;
> @@ -2014,8 +2021,7 @@ build_srat(GArray *table_data, BIOSLinker *linker, MachineState *machine)
>          }
>  
>          if (mem_len > 0) {
> -            numamem = acpi_data_push(table_data, sizeof *numamem);
> -            build_srat_memory(numamem, mem_base, mem_len, i - 1,
> +            build_srat_memory(table_data, mem_base, mem_len, i - 1,
>                                MEM_AFFINITY_ENABLED);
>          }
>      }
> @@ -2024,10 +2030,15 @@ build_srat(GArray *table_data, BIOSLinker *linker, MachineState *machine)
>          nvdimm_build_srat(table_data);
>      }
>  
> -    slots = (table_data->len - numa_start) / sizeof *numamem;
> +    /*
> +     * TODO: this part is not in ACPI spec and current linux kernel boots fine
> +     * without these entries. But I recall there were issues the last time I
> +     * tried to remove it with some ancient guest OS, however I can't remember
> +     * what that was so keep this around for now
> +     */
> +    slots = (table_data->len - numa_mem_start) / 40 /* mem affinity len */;
>      for (; slots < nb_numa_nodes + 2; slots++) {
> -        numamem = acpi_data_push(table_data, sizeof *numamem);
> -        build_srat_memory(numamem, 0, 0, 0, MEM_AFFINITY_NOFLAGS);
> +        build_srat_memory(table_data, 0, 0, 0, MEM_AFFINITY_NOFLAGS);
>      }
>  
>      /*
> @@ -2039,8 +2050,7 @@ build_srat(GArray *table_data, BIOSLinker *linker, MachineState *machine)
>       * providing _PXM method if necessary.
>       */
>      if (hotplugabble_address_space_size) {
> -        numamem = acpi_data_push(table_data, sizeof *numamem);
> -        build_srat_memory(numamem, machine->device_memory->base,
> +        build_srat_memory(table_data, machine->device_memory->base,
>                            hotplugabble_address_space_size, nb_numa_nodes - 1,
>                            MEM_AFFINITY_HOTPLUGGABLE | MEM_AFFINITY_ENABLED);
>      }
> 
Besides
Reviewed-by: Eric Auger <eric.auger@redhat.com>

Eric