mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
877 lines
23 KiB
877 lines
23 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* acpi_tables.c - ACPI Boot-Time Table Parsing |
|
* |
|
* Copyright (C) 2001 Paul Diefenbaugh <[email protected]> |
|
*/ |
|
|
|
/* Uncomment next line to get verbose printout */ |
|
/* #define DEBUG */ |
|
#define pr_fmt(fmt) "ACPI: " fmt |
|
|
|
#include <linux/init.h> |
|
#include <linux/kernel.h> |
|
#include <linux/smp.h> |
|
#include <linux/string.h> |
|
#include <linux/types.h> |
|
#include <linux/irq.h> |
|
#include <linux/errno.h> |
|
#include <linux/acpi.h> |
|
#include <linux/memblock.h> |
|
#include <linux/earlycpio.h> |
|
#include <linux/initrd.h> |
|
#include <linux/security.h> |
|
#include "internal.h" |
|
|
|
#ifdef CONFIG_ACPI_CUSTOM_DSDT |
|
#include CONFIG_ACPI_CUSTOM_DSDT_FILE |
|
#endif |
|
|
|
#define ACPI_MAX_TABLES 128 |
|
|
|
static char *mps_inti_flags_polarity[] = { "dfl", "high", "res", "low" }; |
|
static char *mps_inti_flags_trigger[] = { "dfl", "edge", "res", "level" }; |
|
|
|
static struct acpi_table_desc initial_tables[ACPI_MAX_TABLES] __initdata; |
|
|
|
static int acpi_apic_instance __initdata; |
|
|
|
enum acpi_subtable_type { |
|
ACPI_SUBTABLE_COMMON, |
|
ACPI_SUBTABLE_HMAT, |
|
}; |
|
|
|
struct acpi_subtable_entry { |
|
union acpi_subtable_headers *hdr; |
|
enum acpi_subtable_type type; |
|
}; |
|
|
|
/* |
|
* Disable table checksum verification for the early stage due to the size |
|
* limitation of the current x86 early mapping implementation. |
|
*/ |
|
static bool acpi_verify_table_checksum __initdata = false; |
|
|
|
void acpi_table_print_madt_entry(struct acpi_subtable_header *header) |
|
{ |
|
if (!header) |
|
return; |
|
|
|
switch (header->type) { |
|
|
|
case ACPI_MADT_TYPE_LOCAL_APIC: |
|
{ |
|
struct acpi_madt_local_apic *p = |
|
(struct acpi_madt_local_apic *)header; |
|
pr_debug("LAPIC (acpi_id[0x%02x] lapic_id[0x%02x] %s)\n", |
|
p->processor_id, p->id, |
|
(p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); |
|
} |
|
break; |
|
|
|
case ACPI_MADT_TYPE_LOCAL_X2APIC: |
|
{ |
|
struct acpi_madt_local_x2apic *p = |
|
(struct acpi_madt_local_x2apic *)header; |
|
pr_debug("X2APIC (apic_id[0x%02x] uid[0x%02x] %s)\n", |
|
p->local_apic_id, p->uid, |
|
(p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); |
|
} |
|
break; |
|
|
|
case ACPI_MADT_TYPE_IO_APIC: |
|
{ |
|
struct acpi_madt_io_apic *p = |
|
(struct acpi_madt_io_apic *)header; |
|
pr_debug("IOAPIC (id[0x%02x] address[0x%08x] gsi_base[%d])\n", |
|
p->id, p->address, p->global_irq_base); |
|
} |
|
break; |
|
|
|
case ACPI_MADT_TYPE_INTERRUPT_OVERRIDE: |
|
{ |
|
struct acpi_madt_interrupt_override *p = |
|
(struct acpi_madt_interrupt_override *)header; |
|
pr_info("INT_SRC_OVR (bus %d bus_irq %d global_irq %d %s %s)\n", |
|
p->bus, p->source_irq, p->global_irq, |
|
mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], |
|
mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2]); |
|
if (p->inti_flags & |
|
~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)) |
|
pr_info("INT_SRC_OVR unexpected reserved flags: 0x%x\n", |
|
p->inti_flags & |
|
~(ACPI_MADT_POLARITY_MASK | ACPI_MADT_TRIGGER_MASK)); |
|
} |
|
break; |
|
|
|
case ACPI_MADT_TYPE_NMI_SOURCE: |
|
{ |
|
struct acpi_madt_nmi_source *p = |
|
(struct acpi_madt_nmi_source *)header; |
|
pr_info("NMI_SRC (%s %s global_irq %d)\n", |
|
mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], |
|
mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], |
|
p->global_irq); |
|
} |
|
break; |
|
|
|
case ACPI_MADT_TYPE_LOCAL_APIC_NMI: |
|
{ |
|
struct acpi_madt_local_apic_nmi *p = |
|
(struct acpi_madt_local_apic_nmi *)header; |
|
pr_info("LAPIC_NMI (acpi_id[0x%02x] %s %s lint[0x%x])\n", |
|
p->processor_id, |
|
mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK ], |
|
mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], |
|
p->lint); |
|
} |
|
break; |
|
|
|
case ACPI_MADT_TYPE_LOCAL_X2APIC_NMI: |
|
{ |
|
u16 polarity, trigger; |
|
struct acpi_madt_local_x2apic_nmi *p = |
|
(struct acpi_madt_local_x2apic_nmi *)header; |
|
|
|
polarity = p->inti_flags & ACPI_MADT_POLARITY_MASK; |
|
trigger = (p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2; |
|
|
|
pr_info("X2APIC_NMI (uid[0x%02x] %s %s lint[0x%x])\n", |
|
p->uid, |
|
mps_inti_flags_polarity[polarity], |
|
mps_inti_flags_trigger[trigger], |
|
p->lint); |
|
} |
|
break; |
|
|
|
case ACPI_MADT_TYPE_LOCAL_APIC_OVERRIDE: |
|
{ |
|
struct acpi_madt_local_apic_override *p = |
|
(struct acpi_madt_local_apic_override *)header; |
|
pr_info("LAPIC_ADDR_OVR (address[%p])\n", |
|
(void *)(unsigned long)p->address); |
|
} |
|
break; |
|
|
|
case ACPI_MADT_TYPE_IO_SAPIC: |
|
{ |
|
struct acpi_madt_io_sapic *p = |
|
(struct acpi_madt_io_sapic *)header; |
|
pr_debug("IOSAPIC (id[0x%x] address[%p] gsi_base[%d])\n", |
|
p->id, (void *)(unsigned long)p->address, |
|
p->global_irq_base); |
|
} |
|
break; |
|
|
|
case ACPI_MADT_TYPE_LOCAL_SAPIC: |
|
{ |
|
struct acpi_madt_local_sapic *p = |
|
(struct acpi_madt_local_sapic *)header; |
|
pr_debug("LSAPIC (acpi_id[0x%02x] lsapic_id[0x%02x] lsapic_eid[0x%02x] %s)\n", |
|
p->processor_id, p->id, p->eid, |
|
(p->lapic_flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); |
|
} |
|
break; |
|
|
|
case ACPI_MADT_TYPE_INTERRUPT_SOURCE: |
|
{ |
|
struct acpi_madt_interrupt_source *p = |
|
(struct acpi_madt_interrupt_source *)header; |
|
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", |
|
mps_inti_flags_polarity[p->inti_flags & ACPI_MADT_POLARITY_MASK], |
|
mps_inti_flags_trigger[(p->inti_flags & ACPI_MADT_TRIGGER_MASK) >> 2], |
|
p->type, p->id, p->eid, p->io_sapic_vector, |
|
p->global_irq); |
|
} |
|
break; |
|
|
|
case ACPI_MADT_TYPE_GENERIC_INTERRUPT: |
|
{ |
|
struct acpi_madt_generic_interrupt *p = |
|
(struct acpi_madt_generic_interrupt *)header; |
|
pr_debug("GICC (acpi_id[0x%04x] address[%llx] MPIDR[0x%llx] %s)\n", |
|
p->uid, p->base_address, |
|
p->arm_mpidr, |
|
(p->flags & ACPI_MADT_ENABLED) ? "enabled" : "disabled"); |
|
|
|
} |
|
break; |
|
|
|
case ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR: |
|
{ |
|
struct acpi_madt_generic_distributor *p = |
|
(struct acpi_madt_generic_distributor *)header; |
|
pr_debug("GIC Distributor (gic_id[0x%04x] address[%llx] gsi_base[%d])\n", |
|
p->gic_id, p->base_address, |
|
p->global_irq_base); |
|
} |
|
break; |
|
|
|
default: |
|
pr_warn("Found unsupported MADT entry (type = 0x%x)\n", |
|
header->type); |
|
break; |
|
} |
|
} |
|
|
|
static unsigned long __init |
|
acpi_get_entry_type(struct acpi_subtable_entry *entry) |
|
{ |
|
switch (entry->type) { |
|
case ACPI_SUBTABLE_COMMON: |
|
return entry->hdr->common.type; |
|
case ACPI_SUBTABLE_HMAT: |
|
return entry->hdr->hmat.type; |
|
} |
|
return 0; |
|
} |
|
|
|
static unsigned long __init |
|
acpi_get_entry_length(struct acpi_subtable_entry *entry) |
|
{ |
|
switch (entry->type) { |
|
case ACPI_SUBTABLE_COMMON: |
|
return entry->hdr->common.length; |
|
case ACPI_SUBTABLE_HMAT: |
|
return entry->hdr->hmat.length; |
|
} |
|
return 0; |
|
} |
|
|
|
static unsigned long __init |
|
acpi_get_subtable_header_length(struct acpi_subtable_entry *entry) |
|
{ |
|
switch (entry->type) { |
|
case ACPI_SUBTABLE_COMMON: |
|
return sizeof(entry->hdr->common); |
|
case ACPI_SUBTABLE_HMAT: |
|
return sizeof(entry->hdr->hmat); |
|
} |
|
return 0; |
|
} |
|
|
|
static enum acpi_subtable_type __init |
|
acpi_get_subtable_type(char *id) |
|
{ |
|
if (strncmp(id, ACPI_SIG_HMAT, 4) == 0) |
|
return ACPI_SUBTABLE_HMAT; |
|
return ACPI_SUBTABLE_COMMON; |
|
} |
|
|
|
/** |
|
* acpi_parse_entries_array - for each proc_num find a suitable subtable |
|
* |
|
* @id: table id (for debugging purposes) |
|
* @table_size: size of the root table |
|
* @table_header: where does the table start? |
|
* @proc: array of acpi_subtable_proc struct containing entry id |
|
* and associated handler with it |
|
* @proc_num: how big proc is? |
|
* @max_entries: how many entries can we process? |
|
* |
|
* For each proc_num find a subtable with proc->id and run proc->handler |
|
* on it. Assumption is that there's only single handler for particular |
|
* entry id. |
|
* |
|
* The table_size is not the size of the complete ACPI table (the length |
|
* field in the header struct), but only the size of the root table; i.e., |
|
* the offset from the very first byte of the complete ACPI table, to the |
|
* first byte of the very first subtable. |
|
* |
|
* On success returns sum of all matching entries for all proc handlers. |
|
* Otherwise, -ENODEV or -EINVAL is returned. |
|
*/ |
|
static int __init acpi_parse_entries_array(char *id, unsigned long table_size, |
|
struct acpi_table_header *table_header, |
|
struct acpi_subtable_proc *proc, int proc_num, |
|
unsigned int max_entries) |
|
{ |
|
struct acpi_subtable_entry entry; |
|
unsigned long table_end, subtable_len, entry_len; |
|
int count = 0; |
|
int errs = 0; |
|
int i; |
|
|
|
table_end = (unsigned long)table_header + table_header->length; |
|
|
|
/* Parse all entries looking for a match. */ |
|
|
|
entry.type = acpi_get_subtable_type(id); |
|
entry.hdr = (union acpi_subtable_headers *) |
|
((unsigned long)table_header + table_size); |
|
subtable_len = acpi_get_subtable_header_length(&entry); |
|
|
|
while (((unsigned long)entry.hdr) + subtable_len < table_end) { |
|
if (max_entries && count >= max_entries) |
|
break; |
|
|
|
for (i = 0; i < proc_num; i++) { |
|
if (acpi_get_entry_type(&entry) != proc[i].id) |
|
continue; |
|
if (!proc[i].handler || |
|
(!errs && proc[i].handler(entry.hdr, table_end))) { |
|
errs++; |
|
continue; |
|
} |
|
|
|
proc[i].count++; |
|
break; |
|
} |
|
if (i != proc_num) |
|
count++; |
|
|
|
/* |
|
* If entry->length is 0, break from this loop to avoid |
|
* infinite loop. |
|
*/ |
|
entry_len = acpi_get_entry_length(&entry); |
|
if (entry_len == 0) { |
|
pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, proc->id); |
|
return -EINVAL; |
|
} |
|
|
|
entry.hdr = (union acpi_subtable_headers *) |
|
((unsigned long)entry.hdr + entry_len); |
|
} |
|
|
|
if (max_entries && count > max_entries) { |
|
pr_warn("[%4.4s:0x%02x] found the maximum %i entries\n", |
|
id, proc->id, count); |
|
} |
|
|
|
return errs ? -EINVAL : count; |
|
} |
|
|
|
int __init acpi_table_parse_entries_array(char *id, |
|
unsigned long table_size, |
|
struct acpi_subtable_proc *proc, int proc_num, |
|
unsigned int max_entries) |
|
{ |
|
struct acpi_table_header *table_header = NULL; |
|
int count; |
|
u32 instance = 0; |
|
|
|
if (acpi_disabled) |
|
return -ENODEV; |
|
|
|
if (!id) |
|
return -EINVAL; |
|
|
|
if (!table_size) |
|
return -EINVAL; |
|
|
|
if (!strncmp(id, ACPI_SIG_MADT, 4)) |
|
instance = acpi_apic_instance; |
|
|
|
acpi_get_table(id, instance, &table_header); |
|
if (!table_header) { |
|
pr_warn("%4.4s not present\n", id); |
|
return -ENODEV; |
|
} |
|
|
|
count = acpi_parse_entries_array(id, table_size, table_header, |
|
proc, proc_num, max_entries); |
|
|
|
acpi_put_table(table_header); |
|
return count; |
|
} |
|
|
|
int __init acpi_table_parse_entries(char *id, |
|
unsigned long table_size, |
|
int entry_id, |
|
acpi_tbl_entry_handler handler, |
|
unsigned int max_entries) |
|
{ |
|
struct acpi_subtable_proc proc = { |
|
.id = entry_id, |
|
.handler = handler, |
|
}; |
|
|
|
return acpi_table_parse_entries_array(id, table_size, &proc, 1, |
|
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 [email protected]\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 }; |
|
|
|
#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_find_in_range(0, ACPI_TABLE_UPGRADE_MAX_PHYS, |
|
all_tables_size, PAGE_SIZE); |
|
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. |
|
*/ |
|
memblock_reserve(acpi_tables_addr, all_tables_size); |
|
arch_reserve_mem_area(acpi_tables_addr, all_tables_size); |
|
|
|
/* |
|
* 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_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_table(acpi_tables_addr + table_offset, TRUE); |
|
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);
|
|
|