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authorLinus Torvalds <torvalds@linux-foundation.org>2022-01-13 02:57:59 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2022-01-13 02:57:59 +0300
commit362f533a2a1098fe95020cb59340023e9b11d062 (patch)
tree12e1162a0c973ff480c789e3f2b3066e42e0ac6a /drivers/acpi/tables.c
parent3acbdbf42e943d85174401357a6b6243479d4c76 (diff)
parentbe185c2988b48db65348d94168c793bdbc8d23c3 (diff)
downloadlinux-362f533a2a1098fe95020cb59340023e9b11d062.tar.xz
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
Diffstat (limited to 'drivers/acpi/tables.c')
-rw-r--r--drivers/acpi/tables.c87
1 files changed, 66 insertions, 21 deletions
diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index 682a3ea9cb40..0741a4933f62 100644
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -35,12 +35,13 @@ 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;
+static int acpi_apic_instance __initdata_or_acpilib;
enum acpi_subtable_type {
ACPI_SUBTABLE_COMMON,
ACPI_SUBTABLE_HMAT,
ACPI_SUBTABLE_PRMT,
+ ACPI_SUBTABLE_CEDT,
};
struct acpi_subtable_entry {
@@ -52,7 +53,7 @@ struct acpi_subtable_entry {
* 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;
+static bool acpi_verify_table_checksum __initdata_or_acpilib = false;
void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
{
@@ -216,7 +217,7 @@ void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
}
}
-static unsigned long __init
+static unsigned long __init_or_acpilib
acpi_get_entry_type(struct acpi_subtable_entry *entry)
{
switch (entry->type) {
@@ -226,11 +227,13 @@ acpi_get_entry_type(struct acpi_subtable_entry *entry)
return entry->hdr->hmat.type;
case ACPI_SUBTABLE_PRMT:
return 0;
+ case ACPI_SUBTABLE_CEDT:
+ return entry->hdr->cedt.type;
}
return 0;
}
-static unsigned long __init
+static unsigned long __init_or_acpilib
acpi_get_entry_length(struct acpi_subtable_entry *entry)
{
switch (entry->type) {
@@ -240,11 +243,13 @@ acpi_get_entry_length(struct acpi_subtable_entry *entry)
return entry->hdr->hmat.length;
case ACPI_SUBTABLE_PRMT:
return entry->hdr->prmt.length;
+ case ACPI_SUBTABLE_CEDT:
+ return entry->hdr->cedt.length;
}
return 0;
}
-static unsigned long __init
+static unsigned long __init_or_acpilib
acpi_get_subtable_header_length(struct acpi_subtable_entry *entry)
{
switch (entry->type) {
@@ -254,20 +259,40 @@ acpi_get_subtable_header_length(struct acpi_subtable_entry *entry)
return sizeof(entry->hdr->hmat);
case ACPI_SUBTABLE_PRMT:
return sizeof(entry->hdr->prmt);
+ case ACPI_SUBTABLE_CEDT:
+ return sizeof(entry->hdr->cedt);
}
return 0;
}
-static enum acpi_subtable_type __init
+static enum acpi_subtable_type __init_or_acpilib
acpi_get_subtable_type(char *id)
{
if (strncmp(id, ACPI_SIG_HMAT, 4) == 0)
return ACPI_SUBTABLE_HMAT;
if (strncmp(id, ACPI_SIG_PRMT, 4) == 0)
return ACPI_SUBTABLE_PRMT;
+ if (strncmp(id, ACPI_SIG_CEDT, 4) == 0)
+ return ACPI_SUBTABLE_CEDT;
return ACPI_SUBTABLE_COMMON;
}
+static __init_or_acpilib bool has_handler(struct acpi_subtable_proc *proc)
+{
+ return proc->handler || proc->handler_arg;
+}
+
+static __init_or_acpilib int call_handler(struct acpi_subtable_proc *proc,
+ union acpi_subtable_headers *hdr,
+ unsigned long end)
+{
+ if (proc->handler)
+ return proc->handler(hdr, end);
+ if (proc->handler_arg)
+ return proc->handler_arg(hdr, proc->arg, end);
+ return -EINVAL;
+}
+
/**
* acpi_parse_entries_array - for each proc_num find a suitable subtable
*
@@ -291,10 +316,10 @@ acpi_get_subtable_type(char *id)
* 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)
+static int __init_or_acpilib 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;
@@ -318,8 +343,9 @@ static int __init acpi_parse_entries_array(char *id, unsigned long table_size,
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))) {
+ if (!has_handler(&proc[i]) ||
+ (!errs &&
+ call_handler(&proc[i], entry.hdr, table_end))) {
errs++;
continue;
}
@@ -352,10 +378,9 @@ static int __init acpi_parse_entries_array(char *id, unsigned long table_size,
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)
+int __init_or_acpilib 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;
@@ -386,21 +411,41 @@ int __init acpi_table_parse_entries_array(char *id,
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)
+static int __init_or_acpilib __acpi_table_parse_entries(
+ 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)
{