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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![Linus Torvalds](/assets/img/avatar_default.png)
- 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). -----BEGIN PGP SIGNATURE----- iQJGBAABCAAwFiEE4fcc61cGeeHD/fCwgsRv/nhiVHEFAl+F4IkSHHJqd0Byand5 c29ja2kubmV0AAoJEILEb/54YlRx1gIQAIZrt09fquEIZhYulGZAkuYhSX2U/DZt poow5+TiGk36JNHlbZS19kZ3F0tJ1wA6CKSfF/bYyULxL+gYaUjdLXzv2kArTSAj nzDXQ2CystpySZI/sEkl4QjsMg0xuZlBhlnCfNHzJw049TgdsJHnxMkJXb8T90A+ l2JKm2OpBkNvQGNpwd3djLg8xSDnHUmuevsWZPHDp92/fLMF9DUBk8dVuEwa0ndF hAUpWm+EL1tJQnhNwtfV/Akd9Ypqgk/7ROFWFHGDtHMZGnBjpyXZw68vHMX7SL6N Ej90GWGPHSJs/7Fsg4Hiaxxcph9WFNLPcpck5lVAMIrNHMKANjqQzCsmHavV/WTG STC9/qwJauA1EOjovlmlCFHctjKE/ya6Hm299WTlfBqB+Lu1L3oMR2CC+Uj0YfyG sv3264rJCsaSw610iwQOG807qHENopASO2q5DuKG0E9JpcaBUwn1N4qP5svvQciq 4aA8Ma6xM/QHCO4CS0Se9C0+WSVtxWwOUichRqQmU4E6u1sXvKJxTeWo79rV7PAh L6BwoOxBLabEiyzpi6HPGs6DoKj/N6tOQenBh4ibdwpAwMtq7hIlBFa0bp19c2wT vx8F2Raa8vbQ2zZ1QEiPZnPLJUoy2DgaCtKJ6E0FTDXNs3VFlWgyhIUlIRqk5BS9 OnAwVAUrTMkJ =feLU -----END PGP SIGNATURE----- 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 ...
513 lines
13 KiB
C
513 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* acpi_numa.c - ACPI NUMA support
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*
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* Copyright (C) 2002 Takayoshi Kochi <t-kochi@bq.jp.nec.com>
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*/
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#define pr_fmt(fmt) "ACPI: " fmt
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/acpi.h>
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#include <linux/memblock.h>
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#include <linux/numa.h>
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#include <linux/nodemask.h>
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#include <linux/topology.h>
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static nodemask_t nodes_found_map = NODE_MASK_NONE;
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/* maps to convert between proximity domain and logical node ID */
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static int pxm_to_node_map[MAX_PXM_DOMAINS]
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= { [0 ... MAX_PXM_DOMAINS - 1] = NUMA_NO_NODE };
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static int node_to_pxm_map[MAX_NUMNODES]
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= { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
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unsigned char acpi_srat_revision __initdata;
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static int acpi_numa __initdata;
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void __init disable_srat(void)
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{
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acpi_numa = -1;
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}
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int pxm_to_node(int pxm)
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{
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if (pxm < 0 || pxm >= MAX_PXM_DOMAINS || numa_off)
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return NUMA_NO_NODE;
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return pxm_to_node_map[pxm];
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}
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EXPORT_SYMBOL(pxm_to_node);
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int node_to_pxm(int node)
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{
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if (node < 0)
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return PXM_INVAL;
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return node_to_pxm_map[node];
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}
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static void __acpi_map_pxm_to_node(int pxm, int node)
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{
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if (pxm_to_node_map[pxm] == NUMA_NO_NODE || node < pxm_to_node_map[pxm])
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pxm_to_node_map[pxm] = node;
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if (node_to_pxm_map[node] == PXM_INVAL || pxm < node_to_pxm_map[node])
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node_to_pxm_map[node] = pxm;
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}
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int acpi_map_pxm_to_node(int pxm)
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{
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int node;
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if (pxm < 0 || pxm >= MAX_PXM_DOMAINS || numa_off)
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return NUMA_NO_NODE;
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node = pxm_to_node_map[pxm];
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if (node == NUMA_NO_NODE) {
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if (nodes_weight(nodes_found_map) >= MAX_NUMNODES)
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return NUMA_NO_NODE;
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node = first_unset_node(nodes_found_map);
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__acpi_map_pxm_to_node(pxm, node);
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node_set(node, nodes_found_map);
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}
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return node;
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}
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EXPORT_SYMBOL(acpi_map_pxm_to_node);
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static void __init
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acpi_table_print_srat_entry(struct acpi_subtable_header *header)
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{
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switch (header->type) {
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case ACPI_SRAT_TYPE_CPU_AFFINITY:
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{
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struct acpi_srat_cpu_affinity *p =
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(struct acpi_srat_cpu_affinity *)header;
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pr_debug("SRAT Processor (id[0x%02x] eid[0x%02x]) in proximity domain %d %s\n",
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p->apic_id, p->local_sapic_eid,
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p->proximity_domain_lo,
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(p->flags & ACPI_SRAT_CPU_ENABLED) ?
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"enabled" : "disabled");
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}
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break;
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case ACPI_SRAT_TYPE_MEMORY_AFFINITY:
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{
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struct acpi_srat_mem_affinity *p =
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(struct acpi_srat_mem_affinity *)header;
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pr_debug("SRAT Memory (0x%llx length 0x%llx) in proximity domain %d %s%s%s\n",
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(unsigned long long)p->base_address,
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(unsigned long long)p->length,
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p->proximity_domain,
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(p->flags & ACPI_SRAT_MEM_ENABLED) ?
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"enabled" : "disabled",
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(p->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE) ?
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" hot-pluggable" : "",
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(p->flags & ACPI_SRAT_MEM_NON_VOLATILE) ?
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" non-volatile" : "");
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}
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break;
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case ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY:
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{
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struct acpi_srat_x2apic_cpu_affinity *p =
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(struct acpi_srat_x2apic_cpu_affinity *)header;
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pr_debug("SRAT Processor (x2apicid[0x%08x]) in proximity domain %d %s\n",
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p->apic_id,
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p->proximity_domain,
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(p->flags & ACPI_SRAT_CPU_ENABLED) ?
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"enabled" : "disabled");
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}
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break;
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case ACPI_SRAT_TYPE_GICC_AFFINITY:
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{
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struct acpi_srat_gicc_affinity *p =
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(struct acpi_srat_gicc_affinity *)header;
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pr_debug("SRAT Processor (acpi id[0x%04x]) in proximity domain %d %s\n",
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p->acpi_processor_uid,
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p->proximity_domain,
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(p->flags & ACPI_SRAT_GICC_ENABLED) ?
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"enabled" : "disabled");
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}
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break;
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case ACPI_SRAT_TYPE_GENERIC_AFFINITY:
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{
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struct acpi_srat_generic_affinity *p =
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(struct acpi_srat_generic_affinity *)header;
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if (p->device_handle_type == 0) {
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/*
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* For pci devices this may be the only place they
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* are assigned a proximity domain
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*/
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pr_debug("SRAT Generic Initiator(Seg:%u BDF:%u) in proximity domain %d %s\n",
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*(u16 *)(&p->device_handle[0]),
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*(u16 *)(&p->device_handle[2]),
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p->proximity_domain,
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(p->flags & ACPI_SRAT_GENERIC_AFFINITY_ENABLED) ?
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"enabled" : "disabled");
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} else {
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/*
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* In this case we can rely on the device having a
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* proximity domain reference
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*/
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pr_debug("SRAT Generic Initiator(HID=%.8s UID=%.4s) in proximity domain %d %s\n",
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(char *)(&p->device_handle[0]),
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(char *)(&p->device_handle[8]),
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p->proximity_domain,
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(p->flags & ACPI_SRAT_GENERIC_AFFINITY_ENABLED) ?
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"enabled" : "disabled");
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}
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}
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break;
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default:
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pr_warn("Found unsupported SRAT entry (type = 0x%x)\n",
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header->type);
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break;
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}
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}
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/*
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* A lot of BIOS fill in 10 (= no distance) everywhere. This messes
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* up the NUMA heuristics which wants the local node to have a smaller
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* distance than the others.
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* Do some quick checks here and only use the SLIT if it passes.
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*/
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static int __init slit_valid(struct acpi_table_slit *slit)
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{
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int i, j;
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int d = slit->locality_count;
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for (i = 0; i < d; i++) {
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for (j = 0; j < d; j++) {
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u8 val = slit->entry[d*i + j];
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if (i == j) {
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if (val != LOCAL_DISTANCE)
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return 0;
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} else if (val <= LOCAL_DISTANCE)
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return 0;
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}
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}
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return 1;
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}
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void __init bad_srat(void)
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{
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pr_err("SRAT: SRAT not used.\n");
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disable_srat();
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}
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int __init srat_disabled(void)
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{
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return acpi_numa < 0;
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}
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#if defined(CONFIG_X86) || defined(CONFIG_ARM64)
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/*
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* Callback for SLIT parsing. pxm_to_node() returns NUMA_NO_NODE for
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* I/O localities since SRAT does not list them. I/O localities are
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* not supported at this point.
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*/
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void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
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{
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int i, j;
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for (i = 0; i < slit->locality_count; i++) {
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const int from_node = pxm_to_node(i);
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if (from_node == NUMA_NO_NODE)
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continue;
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for (j = 0; j < slit->locality_count; j++) {
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const int to_node = pxm_to_node(j);
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if (to_node == NUMA_NO_NODE)
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continue;
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numa_set_distance(from_node, to_node,
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slit->entry[slit->locality_count * i + j]);
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}
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}
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}
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/*
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* Default callback for parsing of the Proximity Domain <-> Memory
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* Area mappings
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*/
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int __init
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acpi_numa_memory_affinity_init(struct acpi_srat_mem_affinity *ma)
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{
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u64 start, end;
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u32 hotpluggable;
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int node, pxm;
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if (srat_disabled())
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goto out_err;
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if (ma->header.length < sizeof(struct acpi_srat_mem_affinity)) {
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pr_err("SRAT: Unexpected header length: %d\n",
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ma->header.length);
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goto out_err_bad_srat;
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}
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if ((ma->flags & ACPI_SRAT_MEM_ENABLED) == 0)
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goto out_err;
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hotpluggable = ma->flags & ACPI_SRAT_MEM_HOT_PLUGGABLE;
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if (hotpluggable && !IS_ENABLED(CONFIG_MEMORY_HOTPLUG))
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goto out_err;
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start = ma->base_address;
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end = start + ma->length;
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pxm = ma->proximity_domain;
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if (acpi_srat_revision <= 1)
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pxm &= 0xff;
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node = acpi_map_pxm_to_node(pxm);
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if (node == NUMA_NO_NODE) {
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pr_err("SRAT: Too many proximity domains.\n");
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goto out_err_bad_srat;
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}
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if (numa_add_memblk(node, start, end) < 0) {
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pr_err("SRAT: Failed to add memblk to node %u [mem %#010Lx-%#010Lx]\n",
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node, (unsigned long long) start,
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(unsigned long long) end - 1);
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goto out_err_bad_srat;
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}
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node_set(node, numa_nodes_parsed);
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pr_info("SRAT: Node %u PXM %u [mem %#010Lx-%#010Lx]%s%s\n",
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node, pxm,
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(unsigned long long) start, (unsigned long long) end - 1,
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hotpluggable ? " hotplug" : "",
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ma->flags & ACPI_SRAT_MEM_NON_VOLATILE ? " non-volatile" : "");
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/* Mark hotplug range in memblock. */
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if (hotpluggable && memblock_mark_hotplug(start, ma->length))
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pr_warn("SRAT: Failed to mark hotplug range [mem %#010Lx-%#010Lx] in memblock\n",
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(unsigned long long)start, (unsigned long long)end - 1);
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max_possible_pfn = max(max_possible_pfn, PFN_UP(end - 1));
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return 0;
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out_err_bad_srat:
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bad_srat();
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out_err:
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return -EINVAL;
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}
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#endif /* defined(CONFIG_X86) || defined (CONFIG_ARM64) */
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static int __init acpi_parse_slit(struct acpi_table_header *table)
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{
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struct acpi_table_slit *slit = (struct acpi_table_slit *)table;
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if (!slit_valid(slit)) {
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pr_info("SLIT table looks invalid. Not used.\n");
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return -EINVAL;
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}
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acpi_numa_slit_init(slit);
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return 0;
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}
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void __init __weak
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acpi_numa_x2apic_affinity_init(struct acpi_srat_x2apic_cpu_affinity *pa)
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{
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pr_warn("Found unsupported x2apic [0x%08x] SRAT entry\n", pa->apic_id);
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}
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static int __init
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acpi_parse_x2apic_affinity(union acpi_subtable_headers *header,
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const unsigned long end)
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{
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struct acpi_srat_x2apic_cpu_affinity *processor_affinity;
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processor_affinity = (struct acpi_srat_x2apic_cpu_affinity *)header;
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acpi_table_print_srat_entry(&header->common);
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/* let architecture-dependent part to do it */
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acpi_numa_x2apic_affinity_init(processor_affinity);
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return 0;
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}
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static int __init
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acpi_parse_processor_affinity(union acpi_subtable_headers *header,
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const unsigned long end)
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{
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struct acpi_srat_cpu_affinity *processor_affinity;
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processor_affinity = (struct acpi_srat_cpu_affinity *)header;
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acpi_table_print_srat_entry(&header->common);
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/* let architecture-dependent part to do it */
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acpi_numa_processor_affinity_init(processor_affinity);
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return 0;
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}
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static int __init
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acpi_parse_gicc_affinity(union acpi_subtable_headers *header,
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const unsigned long end)
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{
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struct acpi_srat_gicc_affinity *processor_affinity;
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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);
|