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![Linus Torvalds](/assets/img/avatar_default.png)
- Rework ACPI sub-table infrastructure to optionally be used outside of __init scenarios and use it for CEDT.CFMWS sub-table parsing. - Add support for extending num_possible_nodes by the potential hotplug CXL memory ranges - Extend tools/testing/cxl with mock memory device health information - Fix a module-reload workqueue race - Fix excessive stack-frame usage - Rename the driver context data structure from "cxl_mem" since that name collides with a proposed driver name - Use EXPORT_SYMBOL_NS_GPL instead of -DDEFAULT_SYMBOL_NAMESPACE at build time -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQSbo+XnGs+rwLz9XGXfioYZHlFsZwUCYd38+QAKCRDfioYZHlFs Z5ijAP9w56E/lf/lQOz3NFG/yCJYMHnIb2jFe2LUqXwRuEdg1QEArMwJo0YDgwmi ACFnIbKTf7qG0PxBkJT83b9CJ2xOsA8= =G5xP -----END PGP SIGNATURE----- Merge tag 'cxl-for-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl Pull CXL (Compute Express Link) updates from Dan Williams: "The highlight is initial support for CXL memory hotplug. The static NUMA node (ACPI SRAT Physical Address to Proximity Domain) information known to platform firmware is extended to support the potential performance-class / memory-target nodes dynamically created from available CXL memory device capacity. New unit test infrastructure is added for validating health information payloads. Fixes to module reload stress and stack usage from exposure in -next are included. A symbol rename and some other miscellaneous fixups are included as well. Summary: - Rework ACPI sub-table infrastructure to optionally be used outside of __init scenarios and use it for CEDT.CFMWS sub-table parsing. - Add support for extending num_possible_nodes by the potential hotplug CXL memory ranges - Extend tools/testing/cxl with mock memory device health information - Fix a module-reload workqueue race - Fix excessive stack-frame usage - Rename the driver context data structure from "cxl_mem" since that name collides with a proposed driver name - Use EXPORT_SYMBOL_NS_GPL instead of -DDEFAULT_SYMBOL_NAMESPACE at build time" * tag 'cxl-for-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl: cxl/core: Remove cxld_const_init in cxl_decoder_alloc() cxl/pmem: Fix module reload vs workqueue state ACPI: NUMA: Add a node and memblk for each CFMWS not in SRAT cxl/test: Mock acpi_table_parse_cedt() cxl/acpi: Convert CFMWS parsing to ACPI sub-table helpers ACPI: Add a context argument for table parsing handlers ACPI: Teach ACPI table parsing about the CEDT header format ACPI: Keep sub-table parsing infrastructure available for modules tools/testing/cxl: add mock output for the GET_HEALTH_INFO command cxl/memdev: Remove unused cxlmd field cxl/core: Convert to EXPORT_SYMBOL_NS_GPL cxl/memdev: Change cxl_mem to a more descriptive name cxl/mbox: Remove bad comment cxl/pmem: Fix reference counting for delayed work
933 lines
25 KiB
C
933 lines
25 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* acpi_tables.c - ACPI Boot-Time Table Parsing
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*
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* Copyright (C) 2001 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*/
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/* Uncomment next line to get verbose printout */
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/* #define DEBUG */
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#define pr_fmt(fmt) "ACPI: " fmt
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/smp.h>
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#include <linux/string.h>
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#include <linux/types.h>
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#include <linux/irq.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/earlycpio.h>
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#include <linux/initrd.h>
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#include <linux/security.h>
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#include <linux/kmemleak.h>
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#include "internal.h"
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#ifdef CONFIG_ACPI_CUSTOM_DSDT
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#include CONFIG_ACPI_CUSTOM_DSDT_FILE
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#endif
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#define ACPI_MAX_TABLES 128
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static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" };
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static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" };
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static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata;
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static int acpi_apic_instance __initdata_or_acpilib;
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enum acpi_subtable_type {
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ACPI_SUBTABLE_COMMON,
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ACPI_SUBTABLE_HMAT,
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ACPI_SUBTABLE_PRMT,
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ACPI_SUBTABLE_CEDT,
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};
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struct acpi_subtable_entry {
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union acpi_subtable_headers *hdr;
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enum acpi_subtable_type type;
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};
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/*
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* Disable table checksum verification for the early stage due to the size
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* limitation of the current x86 early mapping implementation.
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*/
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static bool acpi_verify_table_checksum __initdata_or_acpilib = false;
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void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
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{
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if (!header)
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return;
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switch (header->type) {
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case ACPI_MADT_TYPE_LOCAL_APIC:
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{
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struct acpi_madt_local_apic *p =
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(struct acpi_madt_local_apic *)header;
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pr_debug("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n",
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p->processor_id, p->id,
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(p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
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}
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break;
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case ACPI_MADT_TYPE_LOCAL_X2APIC:
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{
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struct acpi_madt_local_x2apic *p =
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(struct acpi_madt_local_x2apic *)header;
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pr_debug("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n",
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p->local_apic_id, p->uid,
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(p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
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}
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break;
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case ACPI_MADT_TYPE_IO_APIC:
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{
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struct acpi_madt_io_apic *p =
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(struct acpi_madt_io_apic *)header;
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pr_debug("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n",
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p->id, p->address, p->global_irq_base);
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}
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break;
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case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE:
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{
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struct acpi_madt_interrupt_override *p =
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(struct acpi_madt_interrupt_override *)header;
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pr_info("INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n",
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p->bus, p->source_irq, p->global_irq,
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mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
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mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]);
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if (p->inti_flags &
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~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK))
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pr_info("INT_SRC_OVR unexpected reserved flags: 0x%x\n",
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p->inti_flags &
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~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK));
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}
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break;
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case ACPI_MADT_TYPE_NMI_SOURCE:
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{
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struct acpi_madt_nmi_source *p =
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(struct acpi_madt_nmi_source *)header;
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pr_info("NMI_SRC (%s %s global_irq %d)\n",
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mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
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mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
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p->global_irq);
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}
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break;
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case ACPI_MADT_TYPE_LOCAL_APIC_NMI:
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{
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struct acpi_madt_local_apic_nmi *p =
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(struct acpi_madt_local_apic_nmi *)header;
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pr_info("LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n",
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p->processor_id,
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mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ],
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mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
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p->lint);
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}
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break;
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case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI:
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{
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u16 polarity, trigger;
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struct acpi_madt_local_x2apic_nmi *p =
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(struct acpi_madt_local_x2apic_nmi *)header;
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polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK;
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trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2;
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pr_info("X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n",
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p->uid,
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mps_inti_flags_polarity[polarity],
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mps_inti_flags_trigger[trigger],
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p->lint);
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}
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break;
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case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE:
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{
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struct acpi_madt_local_apic_override *p =
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(struct acpi_madt_local_apic_override *)header;
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pr_info("LAPIC_ADDR_OVR (address[%p])\n",
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(void *)(unsigned long)p->address);
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}
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break;
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case ACPI_MADT_TYPE_IO_SAPIC:
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{
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struct acpi_madt_io_sapic *p =
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(struct acpi_madt_io_sapic *)header;
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pr_debug("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n",
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p->id, (void *)(unsigned long)p->address,
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p->global_irq_base);
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}
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break;
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case ACPI_MADT_TYPE_LOCAL_SAPIC:
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{
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struct acpi_madt_local_sapic *p =
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(struct acpi_madt_local_sapic *)header;
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pr_debug("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n",
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p->processor_id, p->id, p->eid,
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(p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
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}
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break;
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case ACPI_MADT_TYPE_INTERRUPT_SOURCE:
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{
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struct acpi_madt_interrupt_source *p =
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(struct acpi_madt_interrupt_source *)header;
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pr_info("PLAT_INT_SRC (%s %s type[0x%x] id[0x%04x] eid[0x%x] iosapic_vector[0x%x] global_irq[0x%x]\n",
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mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK],
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mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2],
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p->type, p->id, p->eid, p->io_sapic_vector,
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p->global_irq);
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}
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break;
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case ACPI_MADT_TYPE_GENERIC_INTERRUPT:
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{
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struct acpi_madt_generic_interrupt *p =
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(struct acpi_madt_generic_interrupt *)header;
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pr_debug("GICC (acpi_id[0x%04x] address[%llx] MPIDR[0x%llx] %s)\n",
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p->uid, p->base_address,
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p->arm_mpidr,
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(p->flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled");
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}
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break;
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case ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR:
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{
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struct acpi_madt_generic_distributor *p =
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(struct acpi_madt_generic_distributor *)header;
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pr_debug("GIC Distributor (gic_id[0x%04x] address[%llx] gsi_base[%d])\n",
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p->gic_id, p->base_address,
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p->global_irq_base);
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}
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break;
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default:
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pr_warn("Found unsupported MADT 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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static unsigned long __init_or_acpilib
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acpi_get_entry_type(struct acpi_subtable_entry *entry)
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{
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switch (entry->type) {
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case ACPI_SUBTABLE_COMMON:
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return entry->hdr->common.type;
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case ACPI_SUBTABLE_HMAT:
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return entry->hdr->hmat.type;
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case ACPI_SUBTABLE_PRMT:
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return 0;
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case ACPI_SUBTABLE_CEDT:
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return entry->hdr->cedt.type;
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}
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return 0;
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}
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static unsigned long __init_or_acpilib
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acpi_get_entry_length(struct acpi_subtable_entry *entry)
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{
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switch (entry->type) {
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case ACPI_SUBTABLE_COMMON:
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return entry->hdr->common.length;
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case ACPI_SUBTABLE_HMAT:
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return entry->hdr->hmat.length;
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case ACPI_SUBTABLE_PRMT:
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return entry->hdr->prmt.length;
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case ACPI_SUBTABLE_CEDT:
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return entry->hdr->cedt.length;
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}
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return 0;
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}
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static unsigned long __init_or_acpilib
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acpi_get_subtable_header_length(struct acpi_subtable_entry *entry)
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{
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switch (entry->type) {
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case ACPI_SUBTABLE_COMMON:
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return sizeof(entry->hdr->common);
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case ACPI_SUBTABLE_HMAT:
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return sizeof(entry->hdr->hmat);
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case ACPI_SUBTABLE_PRMT:
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return sizeof(entry->hdr->prmt);
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case ACPI_SUBTABLE_CEDT:
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return sizeof(entry->hdr->cedt);
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}
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return 0;
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}
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static enum acpi_subtable_type __init_or_acpilib
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acpi_get_subtable_type(char *id)
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{
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if (strncmp(id, ACPI_SIG_HMAT, 4) == 0)
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return ACPI_SUBTABLE_HMAT;
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if (strncmp(id, ACPI_SIG_PRMT, 4) == 0)
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return ACPI_SUBTABLE_PRMT;
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if (strncmp(id, ACPI_SIG_CEDT, 4) == 0)
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return ACPI_SUBTABLE_CEDT;
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return ACPI_SUBTABLE_COMMON;
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}
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static __init_or_acpilib bool has_handler(struct acpi_subtable_proc *proc)
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{
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return proc->handler || proc->handler_arg;
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}
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static __init_or_acpilib int call_handler(struct acpi_subtable_proc *proc,
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union acpi_subtable_headers *hdr,
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unsigned long end)
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{
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if (proc->handler)
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return proc->handler(hdr, end);
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if (proc->handler_arg)
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return proc->handler_arg(hdr, proc->arg, end);
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return -EINVAL;
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}
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/**
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* acpi_parse_entries_array - for each proc_num find a suitable subtable
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*
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* @id: table id (for debugging purposes)
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* @table_size: size of the root table
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* @table_header: where does the table start?
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* @proc: array of acpi_subtable_proc struct containing entry id
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* and associated handler with it
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* @proc_num: how big proc is?
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* @max_entries: how many entries can we process?
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*
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* For each proc_num find a subtable with proc->id and run proc->handler
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* on it. Assumption is that there's only single handler for particular
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* entry id.
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*
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* The table_size is not the size of the complete ACPI table (the length
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* field in the header struct), but only the size of the root table; i.e.,
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* the offset from the very first byte of the complete ACPI table, to the
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* first byte of the very first subtable.
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*
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* On success returns sum of all matching entries for all proc handlers.
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* Otherwise, -ENODEV or -EINVAL is returned.
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*/
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static int __init_or_acpilib acpi_parse_entries_array(
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char *id, unsigned long table_size,
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struct acpi_table_header *table_header, struct acpi_subtable_proc *proc,
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int proc_num, unsigned int max_entries)
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{
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struct acpi_subtable_entry entry;
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unsigned long table_end, subtable_len, entry_len;
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int count = 0;
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int errs = 0;
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int i;
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table_end = (unsigned long)table_header + table_header->length;
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/* Parse all entries looking for a match. */
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entry.type = acpi_get_subtable_type(id);
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entry.hdr = (union acpi_subtable_headers *)
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((unsigned long)table_header + table_size);
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subtable_len = acpi_get_subtable_header_length(&entry);
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while (((unsigned long)entry.hdr) + subtable_len < table_end) {
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if (max_entries && count >= max_entries)
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break;
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for (i = 0; i < proc_num; i++) {
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if (acpi_get_entry_type(&entry) != proc[i].id)
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continue;
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if (!has_handler(&proc[i]) ||
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(!errs &&
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call_handler(&proc[i], entry.hdr, table_end))) {
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errs++;
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continue;
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}
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proc[i].count++;
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break;
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}
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if (i != proc_num)
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count++;
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/*
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* If entry->length is 0, break from this loop to avoid
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* infinite loop.
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*/
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entry_len = acpi_get_entry_length(&entry);
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if (entry_len == 0) {
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pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id);
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return -EINVAL;
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}
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entry.hdr = (union acpi_subtable_headers *)
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((unsigned long)entry.hdr + entry_len);
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}
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if (max_entries && count > max_entries) {
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pr_warn("[%4.4s:0x%02x] found the maximum %i entries\n",
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id, proc->id, count);
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}
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return errs ? -EINVAL : count;
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}
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int __init_or_acpilib acpi_table_parse_entries_array(
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char *id, unsigned long table_size, struct acpi_subtable_proc *proc,
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int proc_num, unsigned int max_entries)
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{
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struct acpi_table_header *table_header = NULL;
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int count;
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u32 instance = 0;
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if (acpi_disabled)
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return -ENODEV;
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if (!id)
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return -EINVAL;
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if (!table_size)
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return -EINVAL;
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if (!strncmp(id, ACPI_SIG_MADT, 4))
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instance = acpi_apic_instance;
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acpi_get_table(id, instance, &table_header);
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if (!table_header) {
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pr_warn("%4.4s not present\n", id);
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return -ENODEV;
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}
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count = acpi_parse_entries_array(id, table_size, table_header,
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proc, proc_num, max_entries);
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acpi_put_table(table_header);
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return count;
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}
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static int __init_or_acpilib __acpi_table_parse_entries(
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char *id, unsigned long table_size, int entry_id,
|
|
acpi_tbl_entry_handler handler, acpi_tbl_entry_handler_arg handler_arg,
|
|
void *arg, unsigned int max_entries)
|
|
{
|
|
struct acpi_subtable_proc proc = {
|
|
.id = entry_id,
|
|
.handler = handler,
|
|
.handler_arg = handler_arg,
|
|
.arg = arg,
|
|
};
|
|
|
|
return acpi_table_parse_entries_array(id, table_size, &proc, 1,
|
|
max_entries);
|
|
}
|
|
|
|
int __init_or_acpilib
|
|
acpi_table_parse_cedt(enum acpi_cedt_type id,
|
|
acpi_tbl_entry_handler_arg handler_arg, void *arg)
|
|
{
|
|
return __acpi_table_parse_entries(ACPI_SIG_CEDT,
|
|
sizeof(struct acpi_table_cedt), id,
|
|
NULL, handler_arg, arg, 0);
|
|
}
|
|
EXPORT_SYMBOL_ACPI_LIB(acpi_table_parse_cedt);
|
|
|
|
int __init acpi_table_parse_entries(char *id, unsigned long table_size,
|
|
int entry_id,
|
|
acpi_tbl_entry_handler handler,
|
|
unsigned int max_entries)
|
|
{
|
|
return __acpi_table_parse_entries(id, table_size, entry_id, handler,
|
|
NULL, NULL, max_entries);
|
|
}
|
|
|
|
int __init acpi_table_parse_madt(enum acpi_madt_type id,
|
|
acpi_tbl_entry_handler handler, unsigned int max_entries)
|
|
{
|
|
return acpi_table_parse_entries(ACPI_SIG_MADT,
|
|
sizeof(struct acpi_table_madt), id,
|
|
handler, max_entries);
|
|
}
|
|
|
|
/**
|
|
* acpi_table_parse - find table with @id, run @handler on it
|
|
* @id: table id to find
|
|
* @handler: handler to run
|
|
*
|
|
* Scan the ACPI System Descriptor Table (STD) for a table matching @id,
|
|
* run @handler on it.
|
|
*
|
|
* Return 0 if table found, -errno if not.
|
|
*/
|
|
int __init acpi_table_parse(char *id, acpi_tbl_table_handler handler)
|
|
{
|
|
struct acpi_table_header *table = NULL;
|
|
|
|
if (acpi_disabled)
|
|
return -ENODEV;
|
|
|
|
if (!id || !handler)
|
|
return -EINVAL;
|
|
|
|
if (strncmp(id, ACPI_SIG_MADT, 4) == 0)
|
|
acpi_get_table(id, acpi_apic_instance, &table);
|
|
else
|
|
acpi_get_table(id, 0, &table);
|
|
|
|
if (table) {
|
|
handler(table);
|
|
acpi_put_table(table);
|
|
return 0;
|
|
} else
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* The BIOS is supposed to supply a single APIC/MADT,
|
|
* but some report two. Provide a knob to use either.
|
|
* (don't you wish instance 0 and 1 were not the same?)
|
|
*/
|
|
static void __init check_multiple_madt(void)
|
|
{
|
|
struct acpi_table_header *table = NULL;
|
|
|
|
acpi_get_table(ACPI_SIG_MADT, 2, &table);
|
|
if (table) {
|
|
pr_warn("BIOS bug: multiple APIC/MADT found, using %d\n",
|
|
acpi_apic_instance);
|
|
pr_warn("If \"acpi_apic_instance=%d\" works better, "
|
|
"notify linux-acpi@vger.kernel.org\n",
|
|
acpi_apic_instance ? 0 : 2);
|
|
acpi_put_table(table);
|
|
|
|
} else
|
|
acpi_apic_instance = 0;
|
|
|
|
return;
|
|
}
|
|
|
|
static void acpi_table_taint(struct acpi_table_header *table)
|
|
{
|
|
pr_warn("Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n",
|
|
table->signature, table->oem_table_id);
|
|
add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
|
|
}
|
|
|
|
#ifdef CONFIG_ACPI_TABLE_UPGRADE
|
|
static u64 acpi_tables_addr;
|
|
static int all_tables_size;
|
|
|
|
/* Copied from acpica/tbutils.c:acpi_tb_checksum() */
|
|
static u8 __init acpi_table_checksum(u8 *buffer, u32 length)
|
|
{
|
|
u8 sum = 0;
|
|
u8 *end = buffer + length;
|
|
|
|
while (buffer < end)
|
|
sum = (u8) (sum + *(buffer++));
|
|
return sum;
|
|
}
|
|
|
|
/* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */
|
|
static const char table_sigs[][ACPI_NAMESEG_SIZE] __initconst = {
|
|
ACPI_SIG_BERT, ACPI_SIG_BGRT, ACPI_SIG_CPEP, ACPI_SIG_ECDT,
|
|
ACPI_SIG_EINJ, ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT,
|
|
ACPI_SIG_MSCT, ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT,
|
|
ACPI_SIG_ASF, ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR,
|
|
ACPI_SIG_HPET, ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG,
|
|
ACPI_SIG_MCHI, ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI,
|
|
ACPI_SIG_TCPA, ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT,
|
|
ACPI_SIG_WDDT, ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT,
|
|
ACPI_SIG_PSDT, ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT,
|
|
ACPI_SIG_IORT, ACPI_SIG_NFIT, ACPI_SIG_HMAT, ACPI_SIG_PPTT,
|
|
ACPI_SIG_NHLT, ACPI_SIG_AEST };
|
|
|
|
#define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
|
|
|
|
#define NR_ACPI_INITRD_TABLES 64
|
|
static struct cpio_data __initdata acpi_initrd_files[NR_ACPI_INITRD_TABLES];
|
|
static DECLARE_BITMAP(acpi_initrd_installed, NR_ACPI_INITRD_TABLES);
|
|
|
|
#define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT)
|
|
|
|
void __init acpi_table_upgrade(void)
|
|
{
|
|
void *data;
|
|
size_t size;
|
|
int sig, no, table_nr = 0, total_offset = 0;
|
|
long offset = 0;
|
|
struct acpi_table_header *table;
|
|
char cpio_path[32] = "kernel/firmware/acpi/";
|
|
struct cpio_data file;
|
|
|
|
if (IS_ENABLED(CONFIG_ACPI_TABLE_OVERRIDE_VIA_BUILTIN_INITRD)) {
|
|
data = __initramfs_start;
|
|
size = __initramfs_size;
|
|
} else {
|
|
data = (void *)initrd_start;
|
|
size = initrd_end - initrd_start;
|
|
}
|
|
|
|
if (data == NULL || size == 0)
|
|
return;
|
|
|
|
for (no = 0; no < NR_ACPI_INITRD_TABLES; no++) {
|
|
file = find_cpio_data(cpio_path, data, size, &offset);
|
|
if (!file.data)
|
|
break;
|
|
|
|
data += offset;
|
|
size -= offset;
|
|
|
|
if (file.size < sizeof(struct acpi_table_header)) {
|
|
pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n",
|
|
cpio_path, file.name);
|
|
continue;
|
|
}
|
|
|
|
table = file.data;
|
|
|
|
for (sig = 0; sig < ARRAY_SIZE(table_sigs); sig++)
|
|
if (!memcmp(table->signature, table_sigs[sig], 4))
|
|
break;
|
|
|
|
if (sig >= ARRAY_SIZE(table_sigs)) {
|
|
pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n",
|
|
cpio_path, file.name);
|
|
continue;
|
|
}
|
|
if (file.size != table->length) {
|
|
pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n",
|
|
cpio_path, file.name);
|
|
continue;
|
|
}
|
|
if (acpi_table_checksum(file.data, table->length)) {
|
|
pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n",
|
|
cpio_path, file.name);
|
|
continue;
|
|
}
|
|
|
|
pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n",
|
|
table->signature, cpio_path, file.name, table->length);
|
|
|
|
all_tables_size += table->length;
|
|
acpi_initrd_files[table_nr].data = file.data;
|
|
acpi_initrd_files[table_nr].size = file.size;
|
|
table_nr++;
|
|
}
|
|
if (table_nr == 0)
|
|
return;
|
|
|
|
if (security_locked_down(LOCKDOWN_ACPI_TABLES)) {
|
|
pr_notice("kernel is locked down, ignoring table override\n");
|
|
return;
|
|
}
|
|
|
|
acpi_tables_addr =
|
|
memblock_phys_alloc_range(all_tables_size, PAGE_SIZE,
|
|
0, ACPI_TABLE_UPGRADE_MAX_PHYS);
|
|
if (!acpi_tables_addr) {
|
|
WARN_ON(1);
|
|
return;
|
|
}
|
|
/*
|
|
* Only calling e820_add_reserve does not work and the
|
|
* tables are invalid (memory got used) later.
|
|
* memblock_reserve works as expected and the tables won't get modified.
|
|
* But it's not enough on X86 because ioremap will
|
|
* complain later (used by acpi_os_map_memory) that the pages
|
|
* that should get mapped are not marked "reserved".
|
|
* Both memblock_reserve and e820__range_add (via arch_reserve_mem_area)
|
|
* works fine.
|
|
*/
|
|
arch_reserve_mem_area(acpi_tables_addr, all_tables_size);
|
|
|
|
kmemleak_ignore_phys(acpi_tables_addr);
|
|
|
|
/*
|
|
* early_ioremap only can remap 256k one time. If we map all
|
|
* tables one time, we will hit the limit. Need to map chunks
|
|
* one by one during copying the same as that in relocate_initrd().
|
|
*/
|
|
for (no = 0; no < table_nr; no++) {
|
|
unsigned char *src_p = acpi_initrd_files[no].data;
|
|
phys_addr_t size = acpi_initrd_files[no].size;
|
|
phys_addr_t dest_addr = acpi_tables_addr + total_offset;
|
|
phys_addr_t slop, clen;
|
|
char *dest_p;
|
|
|
|
total_offset += size;
|
|
|
|
while (size) {
|
|
slop = dest_addr & ~PAGE_MASK;
|
|
clen = size;
|
|
if (clen > MAP_CHUNK_SIZE - slop)
|
|
clen = MAP_CHUNK_SIZE - slop;
|
|
dest_p = early_memremap(dest_addr & PAGE_MASK,
|
|
clen + slop);
|
|
memcpy(dest_p + slop, src_p, clen);
|
|
early_memunmap(dest_p, clen + slop);
|
|
src_p += clen;
|
|
dest_addr += clen;
|
|
size -= clen;
|
|
}
|
|
}
|
|
}
|
|
|
|
static acpi_status
|
|
acpi_table_initrd_override(struct acpi_table_header *existing_table,
|
|
acpi_physical_address *address, u32 *length)
|
|
{
|
|
int table_offset = 0;
|
|
int table_index = 0;
|
|
struct acpi_table_header *table;
|
|
u32 table_length;
|
|
|
|
*length = 0;
|
|
*address = 0;
|
|
if (!acpi_tables_addr)
|
|
return AE_OK;
|
|
|
|
while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) {
|
|
table = acpi_os_map_memory(acpi_tables_addr + table_offset,
|
|
ACPI_HEADER_SIZE);
|
|
if (table_offset + table->length > all_tables_size) {
|
|
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
|
|
WARN_ON(1);
|
|
return AE_OK;
|
|
}
|
|
|
|
table_length = table->length;
|
|
|
|
/* Only override tables matched */
|
|
if (memcmp(existing_table->signature, table->signature, 4) ||
|
|
memcmp(table->oem_id, existing_table->oem_id,
|
|
ACPI_OEM_ID_SIZE) ||
|
|
memcmp(table->oem_table_id, existing_table->oem_table_id,
|
|
ACPI_OEM_TABLE_ID_SIZE)) {
|
|
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
|
|
goto next_table;
|
|
}
|
|
/*
|
|
* Mark the table to avoid being used in
|
|
* acpi_table_initrd_scan() and check the revision.
|
|
*/
|
|
if (test_and_set_bit(table_index, acpi_initrd_installed) ||
|
|
existing_table->oem_revision >= table->oem_revision) {
|
|
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
|
|
goto next_table;
|
|
}
|
|
|
|
*length = table_length;
|
|
*address = acpi_tables_addr + table_offset;
|
|
pr_info("Table Upgrade: override [%4.4s-%6.6s-%8.8s]\n",
|
|
table->signature, table->oem_id,
|
|
table->oem_table_id);
|
|
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
|
|
break;
|
|
|
|
next_table:
|
|
table_offset += table_length;
|
|
table_index++;
|
|
}
|
|
return AE_OK;
|
|
}
|
|
|
|
static void __init acpi_table_initrd_scan(void)
|
|
{
|
|
int table_offset = 0;
|
|
int table_index = 0;
|
|
u32 table_length;
|
|
struct acpi_table_header *table;
|
|
|
|
if (!acpi_tables_addr)
|
|
return;
|
|
|
|
while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) {
|
|
table = acpi_os_map_memory(acpi_tables_addr + table_offset,
|
|
ACPI_HEADER_SIZE);
|
|
if (table_offset + table->length > all_tables_size) {
|
|
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
|
|
WARN_ON(1);
|
|
return;
|
|
}
|
|
|
|
table_length = table->length;
|
|
|
|
/* Skip RSDT/XSDT which should only be used for override */
|
|
if (ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_RSDT) ||
|
|
ACPI_COMPARE_NAMESEG(table->signature, ACPI_SIG_XSDT)) {
|
|
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
|
|
goto next_table;
|
|
}
|
|
/*
|
|
* Mark the table to avoid being used in
|
|
* acpi_table_initrd_override(). Though this is not possible
|
|
* because override is disabled in acpi_install_physical_table().
|
|
*/
|
|
if (test_and_set_bit(table_index, acpi_initrd_installed)) {
|
|
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
|
|
goto next_table;
|
|
}
|
|
|
|
pr_info("Table Upgrade: install [%4.4s-%6.6s-%8.8s]\n",
|
|
table->signature, table->oem_id,
|
|
table->oem_table_id);
|
|
acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
|
|
acpi_install_physical_table(acpi_tables_addr + table_offset);
|
|
next_table:
|
|
table_offset += table_length;
|
|
table_index++;
|
|
}
|
|
}
|
|
#else
|
|
static acpi_status
|
|
acpi_table_initrd_override(struct acpi_table_header *existing_table,
|
|
acpi_physical_address *address,
|
|
u32 *table_length)
|
|
{
|
|
*table_length = 0;
|
|
*address = 0;
|
|
return AE_OK;
|
|
}
|
|
|
|
static void __init acpi_table_initrd_scan(void)
|
|
{
|
|
}
|
|
#endif /* CONFIG_ACPI_TABLE_UPGRADE */
|
|
|
|
acpi_status
|
|
acpi_os_physical_table_override(struct acpi_table_header *existing_table,
|
|
acpi_physical_address *address,
|
|
u32 *table_length)
|
|
{
|
|
return acpi_table_initrd_override(existing_table, address,
|
|
table_length);
|
|
}
|
|
|
|
#ifdef CONFIG_ACPI_CUSTOM_DSDT
|
|
static void *amlcode __attribute__ ((weakref("AmlCode")));
|
|
static void *dsdt_amlcode __attribute__ ((weakref("dsdt_aml_code")));
|
|
#endif
|
|
|
|
acpi_status acpi_os_table_override(struct acpi_table_header *existing_table,
|
|
struct acpi_table_header **new_table)
|
|
{
|
|
if (!existing_table || !new_table)
|
|
return AE_BAD_PARAMETER;
|
|
|
|
*new_table = NULL;
|
|
|
|
#ifdef CONFIG_ACPI_CUSTOM_DSDT
|
|
if (!strncmp(existing_table->signature, "DSDT", 4)) {
|
|
*new_table = (struct acpi_table_header *)&amlcode;
|
|
if (!(*new_table))
|
|
*new_table = (struct acpi_table_header *)&dsdt_amlcode;
|
|
}
|
|
#endif
|
|
if (*new_table != NULL)
|
|
acpi_table_taint(existing_table);
|
|
return AE_OK;
|
|
}
|
|
|
|
/*
|
|
* acpi_locate_initial_tables()
|
|
*
|
|
* find RSDP, find and checksum SDT/XSDT.
|
|
* checksum all tables, print SDT/XSDT
|
|
*
|
|
* result: sdt_entry[] is initialized
|
|
*/
|
|
|
|
int __init acpi_locate_initial_tables(void)
|
|
{
|
|
acpi_status status;
|
|
|
|
if (acpi_verify_table_checksum) {
|
|
pr_info("Early table checksum verification enabled\n");
|
|
acpi_gbl_enable_table_validation = TRUE;
|
|
} else {
|
|
pr_info("Early table checksum verification disabled\n");
|
|
acpi_gbl_enable_table_validation = FALSE;
|
|
}
|
|
|
|
status = acpi_initialize_tables(initial_tables, ACPI_MAX_TABLES, 0);
|
|
if (ACPI_FAILURE(status))
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void __init acpi_reserve_initial_tables(void)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ACPI_MAX_TABLES; i++) {
|
|
struct acpi_table_desc *table_desc = &initial_tables[i];
|
|
u64 start = table_desc->address;
|
|
u64 size = table_desc->length;
|
|
|
|
if (!start || !size)
|
|
break;
|
|
|
|
pr_info("Reserving %4s table memory at [mem 0x%llx-0x%llx]\n",
|
|
table_desc->signature.ascii, start, start + size - 1);
|
|
|
|
memblock_reserve(start, size);
|
|
}
|
|
}
|
|
|
|
void __init acpi_table_init_complete(void)
|
|
{
|
|
acpi_table_initrd_scan();
|
|
check_multiple_madt();
|
|
}
|
|
|
|
int __init acpi_table_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = acpi_locate_initial_tables();
|
|
if (ret)
|
|
return ret;
|
|
|
|
acpi_table_init_complete();
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __init acpi_parse_apic_instance(char *str)
|
|
{
|
|
if (!str)
|
|
return -EINVAL;
|
|
|
|
if (kstrtoint(str, 0, &acpi_apic_instance))
|
|
return -EINVAL;
|
|
|
|
pr_notice("Shall use APIC/MADT table %d\n", acpi_apic_instance);
|
|
|
|
return 0;
|
|
}
|
|
early_param("acpi_apic_instance", acpi_parse_apic_instance);
|
|
|
|
static int __init acpi_force_table_verification_setup(char *s)
|
|
{
|
|
acpi_verify_table_checksum = true;
|
|
|
|
return 0;
|
|
}
|
|
early_param("acpi_force_table_verification", acpi_force_table_verification_setup);
|
|
|
|
static int __init acpi_force_32bit_fadt_addr(char *s)
|
|
{
|
|
pr_info("Forcing 32 Bit FADT addresses\n");
|
|
acpi_gbl_use32_bit_fadt_addresses = TRUE;
|
|
|
|
return 0;
|
|
}
|
|
early_param("acpi_force_32bit_fadt_addr", acpi_force_32bit_fadt_addr);
|