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Message-Id: <1436795687-18539-1-git-send-email-lukasz.anaczkowski@intel.com>
Date: Mon, 13 Jul 2015 15:54:47 +0200
From: Lukasz Anaczkowski <lukasz.anaczkowski@...el.com>
To: tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
x86@...nel.org, jason@...edaemon.net
Cc: rjw@...ysocki.net, len.brown@...el.com, pavel@....cz,
linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-acpi@...r.kernel.org,
Lukasz Anaczkowski <lukasz.anaczkowski@...el.com>
Subject: [PATCH] x86, acpi: Handle xapic/x2apic entries in MADT
This patch is based on work of "Yinghai Lu <yinghai@...nel.org>"
previously published at https://lkml.org/lkml/2013/1/21/563.
In case when BIOS is populating MADT wiht both x2apic and local apic
entries (as per ACPI spec), kernel builds it's processor table
in the following order: BSP, X2APIC, local APIC, resulting in
processors on the same core are not separated by core count.
This patch fixes this behavior and resulting assignment is
correct.
Signed-off-by: Lukasz Anaczkowski <lukasz.anaczkowski@...el.com>
---
arch/x86/kernel/acpi/boot.c | 29 +++++++++++++-----
drivers/acpi/numa.c | 28 ++++++++++++-----
drivers/acpi/tables.c | 75 ++++++++++++++++++++++++++++-----------------
drivers/irqchip/irq-gic.c | 15 ++++++---
include/linux/acpi.h | 13 ++++++--
5 files changed, 111 insertions(+), 49 deletions(-)
diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c
index e49ee24..1bb79d5 100644
--- a/arch/x86/kernel/acpi/boot.c
+++ b/arch/x86/kernel/acpi/boot.c
@@ -981,6 +981,7 @@ static int __init acpi_parse_madt_lapic_entries(void)
{
int count;
int x2count = 0;
+ struct acpi_subtable_proc madt_proc[2];
if (!cpu_has_apic)
return -ENODEV;
@@ -1004,10 +1005,16 @@ static int __init acpi_parse_madt_lapic_entries(void)
acpi_parse_sapic, MAX_LOCAL_APIC);
if (!count) {
- x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC,
- acpi_parse_x2apic, MAX_LOCAL_APIC);
- count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC,
- acpi_parse_lapic, MAX_LOCAL_APIC);
+ memset(madt_proc, 0, sizeof(madt_proc));
+ madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC;
+ madt_proc[0].handler = acpi_parse_lapic;
+ madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC;
+ madt_proc[1].handler = acpi_parse_x2apic;
+ acpi_table_parse_entries_array(ACPI_SIG_MADT,
+ sizeof(struct acpi_table_madt),
+ madt_proc, ARRAY_SIZE(madt_proc), MAX_LOCAL_APIC);
+ count = madt_proc[0].count;
+ x2count = madt_proc[1].count;
}
if (!count && !x2count) {
printk(KERN_ERR PREFIX "No LAPIC entries present\n");
@@ -1019,10 +1026,16 @@ static int __init acpi_parse_madt_lapic_entries(void)
return count;
}
- x2count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_X2APIC_NMI,
- acpi_parse_x2apic_nmi, 0);
- count = acpi_table_parse_madt(ACPI_MADT_TYPE_LOCAL_APIC_NMI,
- acpi_parse_lapic_nmi, 0);
+ memset(madt_proc, 0, sizeof(madt_proc));
+ madt_proc[0].id = ACPI_MADT_TYPE_LOCAL_APIC_NMI;
+ madt_proc[0].handler = acpi_parse_lapic_nmi;
+ madt_proc[1].id = ACPI_MADT_TYPE_LOCAL_X2APIC_NMI;
+ madt_proc[1].handler = acpi_parse_x2apic_nmi;
+ acpi_table_parse_entries_array(ACPI_SIG_MADT,
+ sizeof(struct acpi_table_madt),
+ madt_proc, ARRAY_SIZE(madt_proc), 0);
+ count = madt_proc[0].count;
+ x2count = madt_proc[1].count;
if (count < 0 || x2count < 0) {
printk(KERN_ERR PREFIX "Error parsing LAPIC NMI entry\n");
/* TBD: Cleanup to allow fallback to MPS */
diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c
index acaa3b4..2bdff0c 100644
--- a/drivers/acpi/numa.c
+++ b/drivers/acpi/numa.c
@@ -314,9 +314,15 @@ 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);
+ struct acpi_subtable_proc srat_proc;
+
+ memset(&srat_proc, 0, sizeof(srat_proc));
+ srat_proc.id = id;
+ srat_proc.handler = handler;
+
+ return acpi_table_parse_entries_array(ACPI_SIG_SRAT,
+ sizeof(struct acpi_table_srat),
+ &srat_proc, 1, max_entries);
}
int __init acpi_numa_init(void)
@@ -331,10 +337,18 @@ int __init acpi_numa_init(void)
/* SRAT: Static Resource Affinity Table */
if (!acpi_table_parse(ACPI_SIG_SRAT, acpi_parse_srat)) {
- acpi_table_parse_srat(ACPI_SRAT_TYPE_X2APIC_CPU_AFFINITY,
- acpi_parse_x2apic_affinity, 0);
- acpi_table_parse_srat(ACPI_SRAT_TYPE_CPU_AFFINITY,
- acpi_parse_processor_affinity, 0);
+ struct acpi_subtable_proc srat_proc[2];
+
+ 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;
+
+ 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,
NR_NODE_MEMBLKS);
diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index 2e19189..1217e41 100644
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -216,25 +216,27 @@ void acpi_table_print_madt_entry(struct acpi_subtable_header *header)
int __init
acpi_parse_entries(char *id, unsigned long table_size,
- acpi_tbl_entry_handler handler,
struct acpi_table_header *table_header,
- int entry_id, unsigned int max_entries)
+ struct acpi_subtable_proc *proc, int proc_num,
+ unsigned int max_entries)
{
struct acpi_subtable_header *entry;
int count = 0;
unsigned long table_end;
+ int i;
- if (acpi_disabled)
+ if (acpi_disabled) {
+ proc[0].count = -ENODEV;
return -ENODEV;
-
- if (!id || !handler)
- return -EINVAL;
-
- if (!table_size)
+ }
+ if (!table_size) {
+ proc[0].count = -EINVAL;
return -EINVAL;
+ }
if (!table_header) {
pr_warn("%4.4s not present\n", id);
+ proc[0].count = -ENODEV;
return -ENODEV;
}
@@ -247,12 +249,17 @@ acpi_parse_entries(char *id, unsigned long table_size,
while (((unsigned long)entry) + sizeof(struct acpi_subtable_header) <
table_end) {
- if (entry->type == entry_id
- && (!max_entries || count < max_entries)) {
- if (handler(entry, table_end))
+ for (i = 0; i < proc_num; i++) {
+ if (entry->type != proc[i].id)
+ continue;
+ if (max_entries && count++ >= max_entries)
+ continue;
+ if (proc[i].handler(entry, table_end)) {
+ proc[i].count = -EINVAL;
return -EINVAL;
-
- count++;
+ }
+ proc[i].count++;
+ break;
}
/*
@@ -260,7 +267,11 @@ acpi_parse_entries(char *id, unsigned long table_size,
* infinite loop.
*/
if (entry->length == 0) {
- pr_err("[%4.4s:0x%02x] Invalid zero length\n", id, entry_id);
+ pr_err("[%4.4s:0x%02x ", id, proc[0].id);
+ for (i = 1; i < proc_num; i++)
+ pr_cont(" 0x%02x", proc[i].id);
+ pr_cont("] Invalid zero length\n");
+ proc[0].count = -EINVAL;
return -EINVAL;
}
@@ -269,18 +280,20 @@ acpi_parse_entries(char *id, unsigned long table_size,
}
if (max_entries && count > max_entries) {
- pr_warn("[%4.4s:0x%02x] ignored %i entries of %i found\n",
- id, entry_id, count - max_entries, count);
+ pr_warn("[%4.4s:0x%02x ", id, proc[0].id);
+ for (i = 1; i < proc_num; i++)
+ pr_cont(" 0x%02x", proc[i].id);
+ pr_cont("] ignored %i entries of %i found\n",
+ count-max_entries, count);
}
return count;
}
int __init
-acpi_table_parse_entries(char *id,
+acpi_table_parse_entries_array(char *id,
unsigned long table_size,
- int entry_id,
- acpi_tbl_entry_handler handler,
+ struct acpi_subtable_proc *proc, int proc_num,
unsigned int max_entries)
{
struct acpi_table_header *table_header = NULL;
@@ -288,11 +301,10 @@ acpi_table_parse_entries(char *id,
int count;
u32 instance = 0;
- if (acpi_disabled)
+ if (acpi_disabled) {
+ proc[0].count = -ENODEV;
return -ENODEV;
-
- if (!id || !handler)
- return -EINVAL;
+ }
if (!strncmp(id, ACPI_SIG_MADT, 4))
instance = acpi_apic_instance;
@@ -300,11 +312,12 @@ acpi_table_parse_entries(char *id,
acpi_get_table_with_size(id, instance, &table_header, &tbl_size);
if (!table_header) {
pr_warn("%4.4s not present\n", id);
+ proc[0].count = -ENODEV;
return -ENODEV;
}
- count = acpi_parse_entries(id, table_size, handler, table_header,
- entry_id, max_entries);
+ count = acpi_parse_entries(id, table_size, table_header,
+ proc, proc_num, max_entries);
early_acpi_os_unmap_memory((char *)table_header, tbl_size);
return count;
@@ -314,9 +327,15 @@ 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);
+ struct acpi_subtable_proc madt_proc;
+
+ memset(&madt_proc, 0, sizeof(madt_proc));
+ madt_proc.id = id;
+ madt_proc.handler = handler;
+
+ return acpi_table_parse_entries_array(ACPI_SIG_MADT,
+ sizeof(struct acpi_table_madt),
+ &madt_proc, 1, max_entries);
}
/**
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 4dd8826..d004a32 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -1091,12 +1091,16 @@ gic_v2_acpi_init(struct acpi_table_header *table)
{
void __iomem *cpu_base, *dist_base;
int count;
+ struct acpi_subtable_proc gic_proc;
+
+ memset(gic_proc, 0, sizeof(gic_proc));
+ gic_proc.id = ACPI_MADT_TYPE_GENERIC_INTERRUPT;
+ gic_proc.handler = gic_acpi_parse_madt_cpu;
/* Collect CPU base addresses */
count = acpi_parse_entries(ACPI_SIG_MADT,
sizeof(struct acpi_table_madt),
- gic_acpi_parse_madt_cpu, table,
- ACPI_MADT_TYPE_GENERIC_INTERRUPT, 0);
+ table, gic_proc, 0);
if (count <= 0) {
pr_err("No valid GICC entries exist\n");
return -EINVAL;
@@ -1106,10 +1110,13 @@ gic_v2_acpi_init(struct acpi_table_header *table)
* Find distributor base address. We expect one distributor entry since
* ACPI 5.1 spec neither support multi-GIC instances nor GIC cascade.
*/
+ memset(gic_proc, 0, sizeof(gic_proc));
+ gic_proc.id = ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR;
+ gic_proc.handler = gic_acpi_parse_madt_distributor;
+
count = acpi_parse_entries(ACPI_SIG_MADT,
sizeof(struct acpi_table_madt),
- gic_acpi_parse_madt_distributor, table,
- ACPI_MADT_TYPE_GENERIC_DISTRIBUTOR, 0);
+ table, gic_proc, 0);
if (count <= 0) {
pr_err("No valid GICD entries exist\n");
return -EINVAL;
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index d2445fa..59b17e8 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -135,6 +135,12 @@ static inline void acpi_initrd_override(void *data, size_t size)
(!entry) || (unsigned long)entry + sizeof(*entry) > end || \
((struct acpi_subtable_header *)entry)->length < sizeof(*entry))
+struct acpi_subtable_proc {
+ int id;
+ acpi_tbl_entry_handler handler;
+ int count;
+};
+
char * __acpi_map_table (unsigned long phys_addr, unsigned long size);
void __acpi_unmap_table(char *map, unsigned long size);
int early_acpi_boot_init(void);
@@ -145,10 +151,13 @@ int acpi_numa_init (void);
int acpi_table_init (void);
int acpi_table_parse(char *id, acpi_tbl_table_handler handler);
+int 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 acpi_parse_entries(char *id, unsigned long table_size,
- acpi_tbl_entry_handler handler,
struct acpi_table_header *table_header,
- int entry_id, unsigned int max_entries);
+ struct acpi_subtable_proc *proc, int proc_num,
+ unsigned int max_entries);
int __init acpi_table_parse_entries(char *id, unsigned long table_size,
int entry_id,
acpi_tbl_entry_handler handler,
--
1.8.3.1
--------------------------------------------------------------------
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