linux/drivers/acpi/numa/srat.c
Linus Torvalds cf1d2b44f6 ACPI updates for 5.10-rc1
- Add support for generic initiator-only proximity domains to
    the ACPI NUMA code and the architectures using it (Jonathan
    Cameron).
 
  - Clean up some non-ACPICA code referring to debug facilities from
    ACPICA that are not actually used in there (Hanjun Guo).
 
  - Add new DPTF driver for the PCH FIVR participant (Srinivas
    Pandruvada).
 
  - Reduce overhead related to accessing GPE registers in ACPICA and
    the OS interface layer and make it possible to access GPE registers
    using logical addresses if they are memory-mapped (Rafael Wysocki).
 
  - Update the ACPICA code in the kernel to upstream revision 20200925
    including changes as follows:
    * Add predefined names from the SMBus sepcification (Bob Moore).
    * Update acpi_help UUID list (Bob Moore).
    * Return exceptions for string-to-integer conversions in iASL (Bob
      Moore).
    * Add a new "ALL <NameSeg>" debugger command (Bob Moore).
    * Add support for 64 bit risc-v compilation (Colin Ian King).
    * Do assorted cleanups (Bob Moore, Colin Ian King, Randy Dunlap).
 
  - Add new ACPI backlight whitelist entry for HP 635 Notebook (Alex
    Hung).
 
  - Move TPS68470 OpRegion driver to drivers/acpi/pmic/ and split out
    Kconfig and Makefile specific for ACPI PMIC (Andy Shevchenko).
 
  - Clean up the ACPI SoC driver for AMD SoCs (Hanjun Guo).
 
  - Add missing config_item_put() to fix refcount leak (Hanjun Guo).
 
  - Drop lefrover field from struct acpi_memory_device (Hanjun Guo).
 
  - Make the ACPI extlog driver check for RDMSR failures (Ben
    Hutchings).
 
  - Fix handling of lid state changes in the ACPI button driver when
    input device is closed (Dmitry Torokhov).
 
  - Fix several assorted build issues (Barnabás Pőcze, John Garry,
    Nathan Chancellor, Tian Tao).
 
  - Drop unused inline functions and reduce code duplication by using
    kobj_to_dev() in the NFIT parsing code (YueHaibing, Wang Qing).
 
  - Serialize tools/power/acpi Makefile (Thomas Renninger).
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Merge tag 'acpi-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI updates from Rafael Wysocki:
 "These add support for generic initiator-only proximity domains to the
  ACPI NUMA code and the architectures using it, clean up some
  non-ACPICA code referring to debug facilities from ACPICA, reduce the
  overhead related to accessing GPE registers, add a new DPTF (Dynamic
  Power and Thermal Framework) participant driver, update the ACPICA
  code in the kernel to upstream revision 20200925, add a new ACPI
  backlight whitelist entry, fix a few assorted issues and clean up some
  code.

  Specifics:

   - Add support for generic initiator-only proximity domains to the
     ACPI NUMA code and the architectures using it (Jonathan Cameron)

   - Clean up some non-ACPICA code referring to debug facilities from
     ACPICA that are not actually used in there (Hanjun Guo)

   - Add new DPTF driver for the PCH FIVR participant (Srinivas
     Pandruvada)

   - Reduce overhead related to accessing GPE registers in ACPICA and
     the OS interface layer and make it possible to access GPE registers
     using logical addresses if they are memory-mapped (Rafael Wysocki)

   - Update the ACPICA code in the kernel to upstream revision 20200925
     including changes as follows:
      + Add predefined names from the SMBus sepcification (Bob Moore)
      + Update acpi_help UUID list (Bob Moore)
      + Return exceptions for string-to-integer conversions in iASL (Bob
        Moore)
      + Add a new "ALL <NameSeg>" debugger command (Bob Moore)
      + Add support for 64 bit risc-v compilation (Colin Ian King)
      + Do assorted cleanups (Bob Moore, Colin Ian King, Randy Dunlap)

   - Add new ACPI backlight whitelist entry for HP 635 Notebook (Alex
     Hung)

   - Move TPS68470 OpRegion driver to drivers/acpi/pmic/ and split out
     Kconfig and Makefile specific for ACPI PMIC (Andy Shevchenko)

   - Clean up the ACPI SoC driver for AMD SoCs (Hanjun Guo)

   - Add missing config_item_put() to fix refcount leak (Hanjun Guo)

   - Drop lefrover field from struct acpi_memory_device (Hanjun Guo)

   - Make the ACPI extlog driver check for RDMSR failures (Ben
     Hutchings)

   - Fix handling of lid state changes in the ACPI button driver when
     input device is closed (Dmitry Torokhov)

   - Fix several assorted build issues (Barnabás Pőcze, John Garry,
     Nathan Chancellor, Tian Tao)

   - Drop unused inline functions and reduce code duplication by using
     kobj_to_dev() in the NFIT parsing code (YueHaibing, Wang Qing)

   - Serialize tools/power/acpi Makefile (Thomas Renninger)"

* tag 'acpi-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (64 commits)
  ACPICA: Update version to 20200925 Version 20200925
  ACPICA: Remove unnecessary semicolon
  ACPICA: Debugger: Add a new command: "ALL <NameSeg>"
  ACPICA: iASL: Return exceptions for string-to-integer conversions
  ACPICA: acpi_help: Update UUID list
  ACPICA: Add predefined names found in the SMBus sepcification
  ACPICA: Tree-wide: fix various typos and spelling mistakes
  ACPICA: Drop the repeated word "an" in a comment
  ACPICA: Add support for 64 bit risc-v compilation
  ACPI: button: fix handling lid state changes when input device closed
  tools/power/acpi: Serialize Makefile
  ACPI: scan: Replace ACPI_DEBUG_PRINT() with pr_debug()
  ACPI: memhotplug: Remove 'state' from struct acpi_memory_device
  ACPI / extlog: Check for RDMSR failure
  ACPI: Make acpi_evaluate_dsm() prototype consistent
  docs: mm: numaperf.rst Add brief description for access class 1.
  node: Add access1 class to represent CPU to memory characteristics
  ACPI: HMAT: Fix handling of changes from ACPI 6.2 to ACPI 6.3
  ACPI: Let ACPI know we support Generic Initiator Affinity Structures
  x86: Support Generic Initiator only proximity domains
  ...
2020-10-14 11:42:04 -07:00

514 lines
13 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* acpi_numa.c - ACPI NUMA support
*
* Copyright (C) 2002 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
*/
#define pr_fmt(fmt) "ACPI: " fmt
#include <linux/module.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/acpi.h>
#include <linux/memblock.h>
#include <linux/numa.h>
#include <linux/nodemask.h>
#include <linux/topology.h>
static nodemask_t nodes_found_map = NODE_MASK_NONE;
/* maps to convert between proximity domain and logical node ID */
static int pxm_to_node_map[MAX_PXM_DOMAINS]
= { [0 ... MAX_PXM_DOMAINS - 1] = NUMA_NO_NODE };
static int node_to_pxm_map[MAX_NUMNODES]
= { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
unsigned char acpi_srat_revision __initdata;
static int acpi_numa __initdata;
void __init disable_srat(void)
{
acpi_numa = -1;
}
int pxm_to_node(int pxm)
{
if (pxm < 0 || pxm >= MAX_PXM_DOMAINS || numa_off)
return NUMA_NO_NODE;
return pxm_to_node_map[pxm];
}
EXPORT_SYMBOL(pxm_to_node);
int node_to_pxm(int node)
{
if (node < 0)
return PXM_INVAL;
return node_to_pxm_map[node];
}
static void __acpi_map_pxm_to_node(int pxm, int node)
{
if (pxm_to_node_map[pxm] == NUMA_NO_NODE || node < pxm_to_node_map[pxm])
pxm_to_node_map[pxm] = node;
if (node_to_pxm_map[node] == PXM_INVAL || pxm < node_to_pxm_map[node])
node_to_pxm_map[node] = pxm;
}
int acpi_map_pxm_to_node(int pxm)
{
int node;
if (pxm < 0 || pxm >= MAX_PXM_DOMAINS || numa_off)
return NUMA_NO_NODE;
node = pxm_to_node_map[pxm];
if (node == NUMA_NO_NODE) {
if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
return NUMA_NO_NODE;
node = first_unset_node(nodes_found_map);
__acpi_map_pxm_to_node(pxm, node);
node_set(node, nodes_found_map);
}
return node;
}
EXPORT_SYMBOL(acpi_map_pxm_to_node);
static void __init
acpi_table_print_srat_entry(struct acpi_subtable_header *header)
{
switch (header->type) {
case ACPI_SRAT_TYPE_CPU_AFFINITY:
{
struct acpi_srat_cpu_affinity *p =
(struct acpi_srat_cpu_affinity *)header;
pr_debug("SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
p->apic_id, p->local_sapic_eid,
p->proximity_domain_lo,
(p->flags & ACPI_SRAT_CPU_ENABLED) ?
"enabled" : "disabled");
}
break;
case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
{
struct acpi_srat_mem_affinity *p =
(struct acpi_srat_mem_affinity *)header;
pr_debug("SRAT Memory (0x%llx length 0x%llx) in proximity domain %d %s%s%s\n",
(unsigned long long)p->base_address,
(unsigned long long)p->length,
p->proximity_domain,
(p->flags & ACPI_SRAT_MEM_ENABLED) ?
"enabled" : "disabled",
(p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE) ?
" hot-pluggable" : "",
(p->flags & ACPI_SRAT_MEM_NON_VOLATILE) ?
" non-volatile" : "");
}
break;
case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
{
struct acpi_srat_x2apic_cpu_affinity *p =
(struct acpi_srat_x2apic_cpu_affinity *)header;
pr_debug("SRAT Processor (x2apicid[0x%08x]) in proximity domain %d %s\n",
p->apic_id,
p->proximity_domain,
(p->flags & ACPI_SRAT_CPU_ENABLED) ?
"enabled" : "disabled");
}
break;
case ACPI_SRAT_TYPE_GICC_AFFINITY:
{
struct acpi_srat_gicc_affinity *p =
(struct acpi_srat_gicc_affinity *)header;
pr_debug("SRAT Processor (acpi id[0x%04x]) in proximity domain %d %s\n",
p->acpi_processor_uid,
p->proximity_domain,
(p->flags & ACPI_SRAT_GICC_ENABLED) ?
"enabled" : "disabled");
}
break;
case ACPI_SRAT_TYPE_GENERIC_AFFINITY:
{
struct acpi_srat_generic_affinity *p =
(struct acpi_srat_generic_affinity *)header;
if (p->device_handle_type == 0) {
/*
* For pci devices this may be the only place they
* are assigned a proximity domain
*/
pr_debug("SRAT Generic Initiator(Seg:%u BDF:%u) in proximity domain %d %s\n",
*(u16 *)(&p->device_handle[0]),
*(u16 *)(&p->device_handle[2]),
p->proximity_domain,
(p->flags & ACPI_SRAT_GENERIC_AFFINITY_ENABLED) ?
"enabled" : "disabled");
} else {
/*
* In this case we can rely on the device having a
* proximity domain reference
*/
pr_debug("SRAT Generic Initiator(HID=%.8s UID=%.4s) in proximity domain %d %s\n",
(char *)(&p->device_handle[0]),
(char *)(&p->device_handle[8]),
p->proximity_domain,
(p->flags & ACPI_SRAT_GENERIC_AFFINITY_ENABLED) ?
"enabled" : "disabled");
}
}
break;
default:
pr_warn("Found unsupported SRAT entry (type = 0x%x)\n",
header->type);
break;
}
}
/*
* A lot of BIOS fill in 10 (= no distance) everywhere. This messes
* up the NUMA heuristics which wants the local node to have a smaller
* distance than the others.
* Do some quick checks here and only use the SLIT if it passes.
*/
static int __init slit_valid(struct acpi_table_slit *slit)
{
int i, j;
int d = slit->locality_count;
for (i = 0; i < d; i++) {
for (j = 0; j < d; j++) {
u8 val = slit->entry[d*i + j];
if (i == j) {
if (val != LOCAL_DISTANCE)
return 0;
} else if (val <= LOCAL_DISTANCE)
return 0;
}
}
return 1;
}
void __init bad_srat(void)
{
pr_err("SRAT: SRAT not used.\n");
disable_srat();
}
int __init srat_disabled(void)
{
return acpi_numa < 0;
}
#if defined(CONFIG_X86) || defined(CONFIG_ARM64)
/*
* Callback for SLIT parsing. pxm_to_node() returns NUMA_NO_NODE for
* I/O localities since SRAT does not list them. I/O localities are
* not supported at this point.
*/
void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
{
int i, j;
for (i = 0; i < slit->locality_count; i++) {
const int from_node = pxm_to_node(i);
if (from_node == NUMA_NO_NODE)
continue;
for (j = 0; j < slit->locality_count; j++) {
const int to_node = pxm_to_node(j);
if (to_node == NUMA_NO_NODE)
continue;
numa_set_distance(from_node, to_node,
slit->entry[slit->locality_count * i + j]);
}
}
}
/*
* Default callback for parsing of the Proximity Domain <-> Memory
* Area mappings
*/
int __init
acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
{
u64 start, end;
u32 hotpluggable;
int node, pxm;
if (srat_disabled())
goto out_err;
if (ma->header.length < sizeof(struct acpi_srat_mem_affinity)) {
pr_err("SRAT: Unexpected header length: %d\n",
ma->header.length);
goto out_err_bad_srat;
}
if ((ma->flags & ACPI_SRAT_MEM_ENABLED) == 0)
goto out_err;
hotpluggable = ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE;
if (hotpluggable && !IS_ENABLED(CONFIG_MEMORY_HOTPLUG))
goto out_err;
start = ma->base_address;
end = start + ma->length;
pxm = ma->proximity_domain;
if (acpi_srat_revision <= 1)
pxm &= 0xff;
node = acpi_map_pxm_to_node(pxm);
if (node == NUMA_NO_NODE) {
pr_err("SRAT: Too many proximity domains.\n");
goto out_err_bad_srat;
}
if (numa_add_memblk(node, start, end) < 0) {
pr_err("SRAT: Failed to add memblk to node %u [mem %#010Lx-%#010Lx]\n",
node, (unsigned long long) start,
(unsigned long long) end - 1);
goto out_err_bad_srat;
}
node_set(node, numa_nodes_parsed);
pr_info("SRAT: Node %u PXM %u [mem %#010Lx-%#010Lx]%s%s\n",
node, pxm,
(unsigned long long) start, (unsigned long long) end - 1,
hotpluggable ? " hotplug" : "",
ma->flags & ACPI_SRAT_MEM_NON_VOLATILE ? " non-volatile" : "");
/* Mark hotplug range in memblock. */
if (hotpluggable && memblock_mark_hotplug(start, ma->length))
pr_warn("SRAT: Failed to mark hotplug range [mem %#010Lx-%#010Lx] in memblock\n",
(unsigned long long)start, (unsigned long long)end - 1);
max_possible_pfn = max(max_possible_pfn, PFN_UP(end - 1));
return 0;
out_err_bad_srat:
bad_srat();
out_err:
return -EINVAL;
}
#endif /* defined(CONFIG_X86) || defined (CONFIG_ARM64) */
static int __init acpi_parse_slit(struct acpi_table_header *table)
{
struct acpi_table_slit *slit = (struct acpi_table_slit *)table;
if (!slit_valid(slit)) {
pr_info("SLIT table looks invalid. Not used.\n");
return -EINVAL;
}
acpi_numa_slit_init(slit);
return 0;
}
void __init __weak
acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
{
pr_warn("Found unsupported x2apic [0x%08x] SRAT entry\n", pa->apic_id);
}
static int __init
acpi_parse_x2apic_affinity(union acpi_subtable_headers *header,
const unsigned long end)
{
struct acpi_srat_x2apic_cpu_affinity *processor_affinity;
processor_affinity = (struct acpi_srat_x2apic_cpu_affinity *)header;
acpi_table_print_srat_entry(&header->common);
/* let architecture-dependent part to do it */
acpi_numa_x2apic_affinity_init(processor_affinity);
return 0;
}
static int __init
acpi_parse_processor_affinity(union acpi_subtable_headers *header,
const unsigned long end)
{
struct acpi_srat_cpu_affinity *processor_affinity;
processor_affinity = (struct acpi_srat_cpu_affinity *)header;
acpi_table_print_srat_entry(&header->common);
/* let architecture-dependent part to do it */
acpi_numa_processor_affinity_init(processor_affinity);
return 0;
}
static int __init
acpi_parse_gicc_affinity(union acpi_subtable_headers *header,
const unsigned long end)
{
struct acpi_srat_gicc_affinity *processor_affinity;
processor_affinity = (struct acpi_srat_gicc_affinity *)header;
acpi_table_print_srat_entry(&header->common);
/* let architecture-dependent part to do it */
acpi_numa_gicc_affinity_init(processor_affinity);
return 0;
}
#if defined(CONFIG_X86) || defined(CONFIG_ARM64)
static int __init
acpi_parse_gi_affinity(union acpi_subtable_headers *header,
const unsigned long end)
{
struct acpi_srat_generic_affinity *gi_affinity;
int node;
gi_affinity = (struct acpi_srat_generic_affinity *)header;
if (!gi_affinity)
return -EINVAL;
acpi_table_print_srat_entry(&header->common);
if (!(gi_affinity->flags & ACPI_SRAT_GENERIC_AFFINITY_ENABLED))
return -EINVAL;
node = acpi_map_pxm_to_node(gi_affinity->proximity_domain);
if (node == NUMA_NO_NODE || node >= MAX_NUMNODES) {
pr_err("SRAT: Too many proximity domains.\n");
return -EINVAL;
}
node_set(node, numa_nodes_parsed);
node_set_state(node, N_GENERIC_INITIATOR);
return 0;
}
#else
static int __init
acpi_parse_gi_affinity(union acpi_subtable_headers *header,
const unsigned long end)
{
return 0;
}
#endif /* defined(CONFIG_X86) || defined (CONFIG_ARM64) */
static int __initdata parsed_numa_memblks;
static int __init
acpi_parse_memory_affinity(union acpi_subtable_headers * header,
const unsigned long end)
{
struct acpi_srat_mem_affinity *memory_affinity;
memory_affinity = (struct acpi_srat_mem_affinity *)header;
acpi_table_print_srat_entry(&header->common);
/* let architecture-dependent part to do it */
if (!acpi_numa_memory_affinity_init(memory_affinity))
parsed_numa_memblks++;
return 0;
}
static int __init acpi_parse_srat(struct acpi_table_header *table)
{
struct acpi_table_srat *srat = (struct acpi_table_srat *)table;
acpi_srat_revision = srat->header.revision;
/* Real work done in acpi_table_parse_srat below. */
return 0;
}
static int __init
acpi_table_parse_srat(enum acpi_srat_type id,
acpi_tbl_entry_handler handler, unsigned int max_entries)
{
return acpi_table_parse_entries(ACPI_SIG_SRAT,
sizeof(struct acpi_table_srat), id,
handler, max_entries);
}
int __init acpi_numa_init(void)
{
int cnt = 0;
if (acpi_disabled)
return -EINVAL;
/*
* Should not limit number with cpu num that is from NR_CPUS or nr_cpus=
* SRAT cpu entries could have different order with that in MADT.
* So go over all cpu entries in SRAT to get apicid to node mapping.
*/
/* SRAT: System Resource Affinity Table */
if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
struct acpi_subtable_proc srat_proc[4];
memset(srat_proc, 0, sizeof(srat_proc));
srat_proc[0].id = ACPI_SRAT_TYPE_CPU_AFFINITY;
srat_proc[0].handler = acpi_parse_processor_affinity;
srat_proc[1].id = ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY;
srat_proc[1].handler = acpi_parse_x2apic_affinity;
srat_proc[2].id = ACPI_SRAT_TYPE_GICC_AFFINITY;
srat_proc[2].handler = acpi_parse_gicc_affinity;
srat_proc[3].id = ACPI_SRAT_TYPE_GENERIC_AFFINITY;
srat_proc[3].handler = acpi_parse_gi_affinity;
acpi_table_parse_entries_array(ACPI_SIG_SRAT,
sizeof(struct acpi_table_srat),
srat_proc, ARRAY_SIZE(srat_proc), 0);
cnt = acpi_table_parse_srat(ACPI_SRAT_TYPE_MEMORY_AFFINITY,
acpi_parse_memory_affinity, 0);
}
/* SLIT: System Locality Information Table */
acpi_table_parse(ACPI_SIG_SLIT, acpi_parse_slit);
if (cnt < 0)
return cnt;
else if (!parsed_numa_memblks)
return -ENOENT;
return 0;
}
static int acpi_get_pxm(acpi_handle h)
{
unsigned long long pxm;
acpi_status status;
acpi_handle handle;
acpi_handle phandle = h;
do {
handle = phandle;
status = acpi_evaluate_integer(handle, "_PXM", NULL, &pxm);
if (ACPI_SUCCESS(status))
return pxm;
status = acpi_get_parent(handle, &phandle);
} while (ACPI_SUCCESS(status));
return -1;
}
int acpi_get_node(acpi_handle handle)
{
int pxm;
pxm = acpi_get_pxm(handle);
return pxm_to_node(pxm);
}
EXPORT_SYMBOL(acpi_get_node);