On Fri, 20 Sep 2019 15:43:46 +0800
Tao Xu <tao3...@intel.com> wrote:
> From: Liu Jingqi <jingqi....@intel.com>
>
> HMAT is defined in ACPI 6.3: 5.2.27 Heterogeneous Memory Attribute Table
> (HMAT). The specification references below link:
> http://www.uefi.org/sites/default/files/resources/ACPI_6_3_final_Jan30.pdf
>
> It describes the memory attributes, such as memory side cache
> attributes and bandwidth and latency details, related to the
> Memory Proximity Domain. The software is
> expected to use this information as hint for optimization.
>
> This structure describes Memory Proximity Domain Attributes by memory
> subsystem and its associativity with processor proximity domain as well as
> hint for memory usage.
>
> In the linux kernel, the codes in drivers/acpi/hmat/hmat.c parse and report
> the platform's HMAT tables.
>
> Reviewed-by: Daniel Black <dan...@linux.ibm.com>
> Reviewed-by: Jonathan Cameron <jonathan.came...@huawei.com>
> Signed-off-by: Liu Jingqi <jingqi....@intel.com>
> Signed-off-by: Tao Xu <tao3...@intel.com>
> ---
>
> No changes in v12.
>
> Changes in v11:
> - Move numa option patches forward.
> ---
> hw/acpi/Kconfig | 5 +++
> hw/acpi/Makefile.objs | 1 +
> hw/acpi/hmat.c | 101 ++++++++++++++++++++++++++++++++++++++++++
> hw/acpi/hmat.h | 45 +++++++++++++++++++
> hw/i386/acpi-build.c | 5 +++
> 5 files changed, 157 insertions(+)
> create mode 100644 hw/acpi/hmat.c
> create mode 100644 hw/acpi/hmat.h
>
> diff --git a/hw/acpi/Kconfig b/hw/acpi/Kconfig
> index 7c59cf900b..039bb99efa 100644
> --- a/hw/acpi/Kconfig
> +++ b/hw/acpi/Kconfig
> @@ -7,6 +7,7 @@ config ACPI_X86
> select ACPI_NVDIMM
> select ACPI_CPU_HOTPLUG
> select ACPI_MEMORY_HOTPLUG
> + select ACPI_HMAT
>
> config ACPI_X86_ICH
> bool
> @@ -31,3 +32,7 @@ config ACPI_VMGENID
> bool
> default y
> depends on PC
> +
> +config ACPI_HMAT
> + bool
> + depends on ACPI
> diff --git a/hw/acpi/Makefile.objs b/hw/acpi/Makefile.objs
> index 9bb2101e3b..c05019b059 100644
> --- a/hw/acpi/Makefile.objs
> +++ b/hw/acpi/Makefile.objs
> @@ -6,6 +6,7 @@ common-obj-$(CONFIG_ACPI_MEMORY_HOTPLUG) += memory_hotplug.o
> common-obj-$(CONFIG_ACPI_CPU_HOTPLUG) += cpu.o
> common-obj-$(CONFIG_ACPI_NVDIMM) += nvdimm.o
> common-obj-$(CONFIG_ACPI_VMGENID) += vmgenid.o
> +common-obj-$(CONFIG_ACPI_HMAT) += hmat.o
> common-obj-$(call lnot,$(CONFIG_ACPI_X86)) += acpi-stub.o
>
> common-obj-y += acpi_interface.o
> diff --git a/hw/acpi/hmat.c b/hw/acpi/hmat.c
> new file mode 100644
> index 0000000000..1368fce7ee
> --- /dev/null
> +++ b/hw/acpi/hmat.c
> @@ -0,0 +1,101 @@
> +/*
> + * HMAT ACPI Implementation
> + *
> + * Copyright(C) 2019 Intel Corporation.
> + *
> + * Author:
> + * Liu jingqi <jingqi....@linux.intel.com>
> + * Tao Xu <tao3...@intel.com>
> + *
> + * HMAT is defined in ACPI 6.3: 5.2.27 Heterogeneous Memory Attribute Table
> + * (HMAT)
> + *
> + * This library is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation; either
> + * version 2 of the License, or (at your option) any later version.
> + *
> + * This library 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
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with this library; if not, see
> <http://www.gnu.org/licenses/>
> + */
> +
> +#include "qemu/osdep.h"
> +#include "sysemu/numa.h"
> +#include "hw/acpi/hmat.h"
> +
> +/*
> + * ACPI 6.3:
> + * 5.2.27.3 Memory Proximity Domain Attributes Structure: Table 5-145
> + */
> +static void build_hmat_mpda(GArray *table_data, uint16_t flags, int
> initiator,
> + int mem_node)
> +{
> +
> + /* Memory Proximity Domain Attributes Structure */
> + /* Type */
> + build_append_int_noprefix(table_data, 0, 2);
> + /* Reserved */
> + build_append_int_noprefix(table_data, 0, 2);
> + /* Length */
> + build_append_int_noprefix(table_data, 40, 4);
> + /* Flags */
> + build_append_int_noprefix(table_data, flags, 2);
> + /* Reserved */
> + build_append_int_noprefix(table_data, 0, 2);
> + /* Proximity Domain for the Attached Initiator */
> + build_append_int_noprefix(table_data, initiator, 4);
^^^ make this argument uint16_t
> + /* Proximity Domain for the Memory */
> + build_append_int_noprefix(table_data, mem_node, 4);
^^^ ditto
> + /* Reserved */
> + build_append_int_noprefix(table_data, 0, 4);
> + /*
> + * Reserved:
> + * Previously defined as the Start Address of the System Physical
> + * Address Range. Deprecated since ACPI Spec 6.3.
> + */
> + build_append_int_noprefix(table_data, 0, 8);
> + /*
> + * Reserved:
> + * Previously defined as the Range Length of the region in bytes.
> + * Deprecated since ACPI Spec 6.3.
> + */
> + build_append_int_noprefix(table_data, 0, 8);
> +}
> +
> +/* Build HMAT sub table structures */
> +static void hmat_build_table_structs(GArray *table_data, NumaState *nstat)
'nstat' is rather obscure, suggest replace it with numa_state in this
patch/series
> +{
> + uint16_t flags;
> + int i;
> +
> + for (i = 0; i < nstat->num_nodes; i++) {
> + flags = 0;
> +
> + if (nstat->nodes[i].initiator_valid) {
> + flags |= HMAT_PROX_INIT_VALID;
> + }
> +
> + build_hmat_mpda(table_data, flags, nstat->nodes[i].initiator, i);
> + }
> +}
> +
> +void build_hmat(GArray *table_data, BIOSLinker *linker, NumaState *nstat)
> +{
> + uint64_t hmat_start;
s/uint64_t/int/ and initialize it at the declaration site
> +
> + hmat_start = table_data->len;
> +
> + /* reserve space for HMAT header */
> + acpi_data_push(table_data, 40);
> +
> + hmat_build_table_structs(table_data, nstat);
> +
> + build_header(linker, table_data,
> + (void *)(table_data->data + hmat_start),
> + "HMAT", table_data->len - hmat_start, 2, NULL, NULL);
> +}
> diff --git a/hw/acpi/hmat.h b/hw/acpi/hmat.h
> new file mode 100644
> index 0000000000..0c1839cf6f
> --- /dev/null
> +++ b/hw/acpi/hmat.h
> @@ -0,0 +1,45 @@
> +/*
> + * HMAT ACPI Implementation Header
> + *
> + * Copyright(C) 2019 Intel Corporation.
> + *
> + * Author:
> + * Liu jingqi <jingqi....@linux.intel.com>
> + * Tao Xu <tao3...@intel.com>
> + *
> + * HMAT is defined in ACPI 6.3: 5.2.27 Heterogeneous Memory Attribute Table
> + * (HMAT)
> + *
> + * This library is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU Lesser General Public
> + * License as published by the Free Software Foundation; either
> + * version 2 of the License, or (at your option) any later version.
> + *
> + * This library 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
> + * Lesser General Public License for more details.
> + *
> + * You should have received a copy of the GNU Lesser General Public
> + * License along with this library; if not, see
> <http://www.gnu.org/licenses/>
> + */
> +
> +#ifndef HMAT_H
> +#define HMAT_H
> +
> +#include "hw/acpi/acpi-defs.h"
> +#include "hw/acpi/acpi.h"
> +#include "hw/acpi/bios-linker-loader.h"
> +#include "hw/acpi/aml-build.h"
Do you really need all of these headers for declaring build_hmat()?
> +
> +/*
> + * ACPI 6.3: 5.2.27.3 Memory Proximity Domain Attributes Structure,
> + * Table 5-145, Field "flag", Bit [0]: set to 1 to indicate that data in
> + * the Proximity Domain for the Attached Initiator field is valid.
> + * Other bits reserved.
> + */
> +#define HMAT_PROX_INIT_VALID 0x1
shortening INITIATOR to INIT makes it too vague, just use INITIATOR
same for PROX.
(applies to other places in this series with similar names)
> +void build_hmat(GArray *table_data, BIOSLinker *linker, NumaState *nstat);
> +
> +#endif
> diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
> index e54e571a75..7f2e05f1a9 100644
> --- a/hw/i386/acpi-build.c
> +++ b/hw/i386/acpi-build.c
> @@ -68,6 +68,7 @@
> #include "hw/i386/intel_iommu.h"
>
> #include "hw/acpi/ipmi.h"
> +#include "hw/acpi/hmat.h"
>
> /* These are used to size the ACPI tables for -M pc-i440fx-1.7 and
> * -M pc-i440fx-2.0. Even if the actual amount of AML generated grows
> @@ -2698,6 +2699,10 @@ void acpi_build(AcpiBuildTables *tables, MachineState
> *machine)
> acpi_add_table(table_offsets, tables_blob);
> build_slit(tables_blob, tables->linker, machine);
> }
> + if (machine->numa_state->hmat_enabled) {
> + acpi_add_table(table_offsets, tables_blob);
> + build_hmat(tables_blob, tables->linker, machine->numa_state);
> + }
> }
> if (acpi_get_mcfg(&mcfg)) {
> acpi_add_table(table_offsets, tables_blob);
