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authorCatalin Marinas <catalin.marinas@arm.com>2015-05-19 16:15:22 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2015-05-19 16:15:22 +0100
commite1d2c88639407ed16d932e56f292267ea3264eea (patch)
tree8f4b7817e9ad943d2166f292cc1360baf9821bbf /arch
parente985ad17cbbb55e10e2139eb25c087ef92fcdd48 (diff)
parent0f0783365cbb7ec13a8f02198f6e1a146d94a5a9 (diff)
downloadlinux-e1d2c88639407ed16d932e56f292267ea3264eea.tar.bz2
Merge branch 'for-next/cpu-init' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
* 'for-next/cpu-init' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: ARM64: kernel: unify ACPI and DT cpus initialization ARM64: kernel: make cpu_ops hooks DT agnostic
Diffstat (limited to 'arch')
-rw-r--r--arch/arm64/include/asm/acpi.h4
-rw-r--r--arch/arm64/include/asm/cpu_ops.h27
-rw-r--r--arch/arm64/include/asm/smp.h2
-rw-r--r--arch/arm64/kernel/acpi.c124
-rw-r--r--arch/arm64/kernel/cpu_ops.c72
-rw-r--r--arch/arm64/kernel/cpuidle.c7
-rw-r--r--arch/arm64/kernel/psci.c11
-rw-r--r--arch/arm64/kernel/setup.c7
-rw-r--r--arch/arm64/kernel/smp.c230
-rw-r--r--arch/arm64/kernel/smp_spin_table.c8
10 files changed, 257 insertions, 235 deletions
diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h
index 59c05d8ea4a0..1240b867d4a2 100644
--- a/arch/arm64/include/asm/acpi.h
+++ b/arch/arm64/include/asm/acpi.h
@@ -93,4 +93,8 @@ static inline bool acpi_psci_use_hvc(void) { return false; }
static inline void acpi_init_cpus(void) { }
#endif /* CONFIG_ACPI */
+static inline const char *acpi_get_enable_method(int cpu)
+{
+ return acpi_psci_present() ? "psci" : NULL;
+}
#endif /*_ASM_ACPI_H*/
diff --git a/arch/arm64/include/asm/cpu_ops.h b/arch/arm64/include/asm/cpu_ops.h
index 5a31d6716914..8f03446cf89f 100644
--- a/arch/arm64/include/asm/cpu_ops.h
+++ b/arch/arm64/include/asm/cpu_ops.h
@@ -19,15 +19,15 @@
#include <linux/init.h>
#include <linux/threads.h>
-struct device_node;
-
/**
* struct cpu_operations - Callback operations for hotplugging CPUs.
*
* @name: Name of the property as appears in a devicetree cpu node's
- * enable-method property.
- * @cpu_init: Reads any data necessary for a specific enable-method from the
- * devicetree, for a given cpu node and proposed logical id.
+ * enable-method property. On systems booting with ACPI, @name
+ * identifies the struct cpu_operations entry corresponding to
+ * the boot protocol specified in the ACPI MADT table.
+ * @cpu_init: Reads any data necessary for a specific enable-method for a
+ * proposed logical id.
* @cpu_prepare: Early one-time preparation step for a cpu. If there is a
* mechanism for doing so, tests whether it is possible to boot
* the given CPU.
@@ -40,15 +40,15 @@ struct device_node;
* @cpu_die: Makes a cpu leave the kernel. Must not fail. Called from the
* cpu being killed.
* @cpu_kill: Ensures a cpu has left the kernel. Called from another cpu.
- * @cpu_init_idle: Reads any data necessary to initialize CPU idle states from
- * devicetree, for a given cpu node and proposed logical id.
+ * @cpu_init_idle: Reads any data necessary to initialize CPU idle states for
+ * a proposed logical id.
* @cpu_suspend: Suspends a cpu and saves the required context. May fail owing
* to wrong parameters or error conditions. Called from the
* CPU being suspended. Must be called with IRQs disabled.
*/
struct cpu_operations {
const char *name;
- int (*cpu_init)(struct device_node *, unsigned int);
+ int (*cpu_init)(unsigned int);
int (*cpu_prepare)(unsigned int);
int (*cpu_boot)(unsigned int);
void (*cpu_postboot)(void);
@@ -58,14 +58,17 @@ struct cpu_operations {
int (*cpu_kill)(unsigned int cpu);
#endif
#ifdef CONFIG_CPU_IDLE
- int (*cpu_init_idle)(struct device_node *, unsigned int);
+ int (*cpu_init_idle)(unsigned int);
int (*cpu_suspend)(unsigned long);
#endif
};
extern const struct cpu_operations *cpu_ops[NR_CPUS];
-int __init cpu_read_ops(struct device_node *dn, int cpu);
-void __init cpu_read_bootcpu_ops(void);
-const struct cpu_operations *cpu_get_ops(const char *name);
+int __init cpu_read_ops(int cpu);
+
+static inline void __init cpu_read_bootcpu_ops(void)
+{
+ cpu_read_ops(0);
+}
#endif /* ifndef __ASM_CPU_OPS_H */
diff --git a/arch/arm64/include/asm/smp.h b/arch/arm64/include/asm/smp.h
index bf22650b1a78..db02be81b90a 100644
--- a/arch/arm64/include/asm/smp.h
+++ b/arch/arm64/include/asm/smp.h
@@ -42,7 +42,7 @@ extern void handle_IPI(int ipinr, struct pt_regs *regs);
* Discover the set of possible CPUs and determine their
* SMP operations.
*/
-extern void of_smp_init_cpus(void);
+extern void smp_init_cpus(void);
/*
* Provide a function to raise an IPI cross call on CPUs in callmap.
diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c
index 8b839558838e..732f57b8731b 100644
--- a/arch/arm64/kernel/acpi.c
+++ b/arch/arm64/kernel/acpi.c
@@ -36,12 +36,6 @@ EXPORT_SYMBOL(acpi_disabled);
int acpi_pci_disabled = 1; /* skip ACPI PCI scan and IRQ initialization */
EXPORT_SYMBOL(acpi_pci_disabled);
-/* Processors with enabled flag and sane MPIDR */
-static int enabled_cpus;
-
-/* Boot CPU is valid or not in MADT */
-static bool bootcpu_valid __initdata;
-
static bool param_acpi_off __initdata;
static bool param_acpi_force __initdata;
@@ -95,124 +89,6 @@ void __init __acpi_unmap_table(char *map, unsigned long size)
early_memunmap(map, size);
}
-/**
- * acpi_map_gic_cpu_interface - generates a logical cpu number
- * and map to MPIDR represented by GICC structure
- */
-static void __init
-acpi_map_gic_cpu_interface(struct acpi_madt_generic_interrupt *processor)
-{
- int i;
- u64 mpidr = processor->arm_mpidr & MPIDR_HWID_BITMASK;
- bool enabled = !!(processor->flags & ACPI_MADT_ENABLED);
-
- if (mpidr == INVALID_HWID) {
- pr_info("Skip MADT cpu entry with invalid MPIDR\n");
- return;
- }
-
- total_cpus++;
- if (!enabled)
- return;
-
- if (enabled_cpus >= NR_CPUS) {
- pr_warn("NR_CPUS limit of %d reached, Processor %d/0x%llx ignored.\n",
- NR_CPUS, total_cpus, mpidr);
- return;
- }
-
- /* Check if GICC structure of boot CPU is available in the MADT */
- if (cpu_logical_map(0) == mpidr) {
- if (bootcpu_valid) {
- pr_err("Firmware bug, duplicate CPU MPIDR: 0x%llx in MADT\n",
- mpidr);
- return;
- }
-
- bootcpu_valid = true;
- }
-
- /*
- * Duplicate MPIDRs are a recipe for disaster. Scan
- * all initialized entries and check for
- * duplicates. If any is found just ignore the CPU.
- */
- for (i = 1; i < enabled_cpus; i++) {
- if (cpu_logical_map(i) == mpidr) {
- pr_err("Firmware bug, duplicate CPU MPIDR: 0x%llx in MADT\n",
- mpidr);
- return;
- }
- }
-
- if (!acpi_psci_present())
- return;
-
- cpu_ops[enabled_cpus] = cpu_get_ops("psci");
- /* CPU 0 was already initialized */
- if (enabled_cpus) {
- if (!cpu_ops[enabled_cpus])
- return;
-
- if (cpu_ops[enabled_cpus]->cpu_init(NULL, enabled_cpus))
- return;
-
- /* map the logical cpu id to cpu MPIDR */
- cpu_logical_map(enabled_cpus) = mpidr;
- }
-
- enabled_cpus++;
-}
-
-static int __init
-acpi_parse_gic_cpu_interface(struct acpi_subtable_header *header,
- const unsigned long end)
-{
- struct acpi_madt_generic_interrupt *processor;
-
- processor = (struct acpi_madt_generic_interrupt *)header;
-
- if (BAD_MADT_ENTRY(processor, end))
- return -EINVAL;
-
- acpi_table_print_madt_entry(header);
- acpi_map_gic_cpu_interface(processor);
- return 0;
-}
-
-/* Parse GIC cpu interface entries in MADT for SMP init */
-void __init acpi_init_cpus(void)
-{
- int count, i;
-
- /*
- * do a partial walk of MADT to determine how many CPUs
- * we have including disabled CPUs, and get information
- * we need for SMP init
- */
- count = acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_INTERRUPT,
- acpi_parse_gic_cpu_interface, 0);
-
- if (!count) {
- pr_err("No GIC CPU interface entries present\n");
- return;
- } else if (count < 0) {
- pr_err("Error parsing GIC CPU interface entry\n");
- return;
- }
-
- if (!bootcpu_valid) {
- pr_err("MADT missing boot CPU MPIDR, not enabling secondaries\n");
- return;
- }
-
- for (i = 0; i < enabled_cpus; i++)
- set_cpu_possible(i, true);
-
- /* Make boot-up look pretty */
- pr_info("%d CPUs enabled, %d CPUs total\n", enabled_cpus, total_cpus);
-}
-
/*
* acpi_fadt_sanity_check() - Check FADT presence and carry out sanity
* checks on it
diff --git a/arch/arm64/kernel/cpu_ops.c b/arch/arm64/kernel/cpu_ops.c
index fb8ff9ba467a..5ea337dd2f15 100644
--- a/arch/arm64/kernel/cpu_ops.c
+++ b/arch/arm64/kernel/cpu_ops.c
@@ -16,11 +16,13 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#include <asm/cpu_ops.h>
-#include <asm/smp_plat.h>
+#include <linux/acpi.h>
#include <linux/errno.h>
#include <linux/of.h>
#include <linux/string.h>
+#include <asm/acpi.h>
+#include <asm/cpu_ops.h>
+#include <asm/smp_plat.h>
extern const struct cpu_operations smp_spin_table_ops;
extern const struct cpu_operations cpu_psci_ops;
@@ -35,7 +37,7 @@ static const struct cpu_operations *supported_cpu_ops[] __initconst = {
NULL,
};
-const struct cpu_operations * __init cpu_get_ops(const char *name)
+static const struct cpu_operations * __init cpu_get_ops(const char *name)
{
const struct cpu_operations **ops = supported_cpu_ops;
@@ -49,39 +51,53 @@ const struct cpu_operations * __init cpu_get_ops(const char *name)
return NULL;
}
+static const char *__init cpu_read_enable_method(int cpu)
+{
+ const char *enable_method;
+
+ if (acpi_disabled) {
+ struct device_node *dn = of_get_cpu_node(cpu, NULL);
+
+ if (!dn) {
+ if (!cpu)
+ pr_err("Failed to find device node for boot cpu\n");
+ return NULL;
+ }
+
+ enable_method = of_get_property(dn, "enable-method", NULL);
+ if (!enable_method) {
+ /*
+ * The boot CPU may not have an enable method (e.g.
+ * when spin-table is used for secondaries).
+ * Don't warn spuriously.
+ */
+ if (cpu != 0)
+ pr_err("%s: missing enable-method property\n",
+ dn->full_name);
+ }
+ } else {
+ enable_method = acpi_get_enable_method(cpu);
+ if (!enable_method)
+ pr_err("Unsupported ACPI enable-method\n");
+ }
+
+ return enable_method;
+}
/*
- * Read a cpu's enable method from the device tree and record it in cpu_ops.
+ * Read a cpu's enable method and record it in cpu_ops.
*/
-int __init cpu_read_ops(struct device_node *dn, int cpu)
+int __init cpu_read_ops(int cpu)
{
- const char *enable_method = of_get_property(dn, "enable-method", NULL);
- if (!enable_method) {
- /*
- * The boot CPU may not have an enable method (e.g. when
- * spin-table is used for secondaries). Don't warn spuriously.
- */
- if (cpu != 0)
- pr_err("%s: missing enable-method property\n",
- dn->full_name);
- return -ENOENT;
- }
+ const char *enable_method = cpu_read_enable_method(cpu);
+
+ if (!enable_method)
+ return -ENODEV;
cpu_ops[cpu] = cpu_get_ops(enable_method);
if (!cpu_ops[cpu]) {
- pr_warn("%s: unsupported enable-method property: %s\n",
- dn->full_name, enable_method);
+ pr_warn("Unsupported enable-method: %s\n", enable_method);
return -EOPNOTSUPP;
}
return 0;
}
-
-void __init cpu_read_bootcpu_ops(void)
-{
- struct device_node *dn = of_get_cpu_node(0, NULL);
- if (!dn) {
- pr_err("Failed to find device node for boot cpu\n");
- return;
- }
- cpu_read_ops(dn, 0);
-}
diff --git a/arch/arm64/kernel/cpuidle.c b/arch/arm64/kernel/cpuidle.c
index a78143a5c99f..f8aa16973318 100644
--- a/arch/arm64/kernel/cpuidle.c
+++ b/arch/arm64/kernel/cpuidle.c
@@ -18,15 +18,10 @@
int arm_cpuidle_init(unsigned int cpu)
{
int ret = -EOPNOTSUPP;
- struct device_node *cpu_node = of_cpu_device_node_get(cpu);
-
- if (!cpu_node)
- return -ENODEV;
if (cpu_ops[cpu] && cpu_ops[cpu]->cpu_init_idle)
- ret = cpu_ops[cpu]->cpu_init_idle(cpu_node, cpu);
+ ret = cpu_ops[cpu]->cpu_init_idle(cpu);
- of_node_put(cpu_node);
return ret;
}
diff --git a/arch/arm64/kernel/psci.c b/arch/arm64/kernel/psci.c
index ea18cb53921e..efe3480a97a9 100644
--- a/arch/arm64/kernel/psci.c
+++ b/arch/arm64/kernel/psci.c
@@ -186,12 +186,15 @@ static int psci_migrate_info_type(void)
return err;
}
-static int __maybe_unused cpu_psci_cpu_init_idle(struct device_node *cpu_node,
- unsigned int cpu)
+static int __maybe_unused cpu_psci_cpu_init_idle(unsigned int cpu)
{
int i, ret, count = 0;
struct psci_power_state *psci_states;
- struct device_node *state_node;
+ struct device_node *state_node, *cpu_node;
+
+ cpu_node = of_get_cpu_node(cpu, NULL);
+ if (!cpu_node)
+ return -ENODEV;
/*
* If the PSCI cpu_suspend function hook has not been initialized
@@ -444,7 +447,7 @@ int __init psci_acpi_init(void)
#ifdef CONFIG_SMP
-static int __init cpu_psci_cpu_init(struct device_node *dn, unsigned int cpu)
+static int __init cpu_psci_cpu_init(unsigned int cpu)
{
return 0;
}
diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
index 74753132c3ac..508cca1f8dce 100644
--- a/arch/arm64/kernel/setup.c
+++ b/arch/arm64/kernel/setup.c
@@ -408,16 +408,13 @@ void __init setup_arch(char **cmdline_p)
if (acpi_disabled) {
unflatten_device_tree();
psci_dt_init();
- cpu_read_bootcpu_ops();
-#ifdef CONFIG_SMP
- of_smp_init_cpus();
-#endif
} else {
psci_acpi_init();
- acpi_init_cpus();
}
+ cpu_read_bootcpu_ops();
#ifdef CONFIG_SMP
+ smp_init_cpus();
smp_build_mpidr_hash();
#endif
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 2cb008177252..b698208848e9 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -17,6 +17,7 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#include <linux/acpi.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/spinlock.h>
@@ -318,57 +319,158 @@ void __init smp_prepare_boot_cpu(void)
set_my_cpu_offset(per_cpu_offset(smp_processor_id()));
}
+static u64 __init of_get_cpu_mpidr(struct device_node *dn)
+{
+ const __be32 *cell;
+ u64 hwid;
+
+ /*
+ * A cpu node with missing "reg" property is
+ * considered invalid to build a cpu_logical_map
+ * entry.
+ */
+ cell = of_get_property(dn, "reg", NULL);
+ if (!cell) {
+ pr_err("%s: missing reg property\n", dn->full_name);
+ return INVALID_HWID;
+ }
+
+ hwid = of_read_number(cell, of_n_addr_cells(dn));
+ /*
+ * Non affinity bits must be set to 0 in the DT
+ */
+ if (hwid & ~MPIDR_HWID_BITMASK) {
+ pr_err("%s: invalid reg property\n", dn->full_name);
+ return INVALID_HWID;
+ }
+ return hwid;
+}
+
+/*
+ * Duplicate MPIDRs are a recipe for disaster. Scan all initialized
+ * entries and check for duplicates. If any is found just ignore the
+ * cpu. cpu_logical_map was initialized to INVALID_HWID to avoid
+ * matching valid MPIDR values.
+ */
+static bool __init is_mpidr_duplicate(unsigned int cpu, u64 hwid)
+{
+ unsigned int i;
+
+ for (i = 1; (i < cpu) && (i < NR_CPUS); i++)
+ if (cpu_logical_map(i) == hwid)
+ return true;
+ return false;
+}
+
+/*
+ * Initialize cpu operations for a logical cpu and
+ * set it in the possible mask on success
+ */
+static int __init smp_cpu_setup(int cpu)
+{
+ if (cpu_read_ops(cpu))
+ return -ENODEV;
+
+ if (cpu_ops[cpu]->cpu_init(cpu))
+ return -ENODEV;
+
+ set_cpu_possible(cpu, true);
+
+ return 0;
+}
+
+static bool bootcpu_valid __initdata;
+static unsigned int cpu_count = 1;
+
+#ifdef CONFIG_ACPI
+/*
+ * acpi_map_gic_cpu_interface - parse processor MADT entry
+ *
+ * Carry out sanity checks on MADT processor entry and initialize
+ * cpu_logical_map on success
+ */
+static void __init
+acpi_map_gic_cpu_interface(struct acpi_madt_generic_interrupt *processor)
+{
+ u64 hwid = processor->arm_mpidr;
+
+ if (hwid & ~MPIDR_HWID_BITMASK || hwid == INVALID_HWID) {
+ pr_err("skipping CPU entry with invalid MPIDR 0x%llx\n", hwid);
+ return;
+ }
+
+ if (!(processor->flags & ACPI_MADT_ENABLED)) {
+ pr_err("skipping disabled CPU entry with 0x%llx MPIDR\n", hwid);
+ return;
+ }
+
+ if (is_mpidr_duplicate(cpu_count, hwid)) {
+ pr_err("duplicate CPU MPIDR 0x%llx in MADT\n", hwid);
+ return;
+ }
+
+ /* Check if GICC structure of boot CPU is available in the MADT */
+ if (cpu_logical_map(0) == hwid) {
+ if (bootcpu_valid) {
+ pr_err("duplicate boot CPU MPIDR: 0x%llx in MADT\n",
+ hwid);
+ return;
+ }
+ bootcpu_valid = true;
+ return;
+ }
+
+ if (cpu_count >= NR_CPUS)
+ return;
+
+ /* map the logical cpu id to cpu MPIDR */
+ cpu_logical_map(cpu_count) = hwid;
+
+ cpu_count++;
+}
+
+static int __init
+acpi_parse_gic_cpu_interface(struct acpi_subtable_header *header,
+ const unsigned long end)
+{
+ struct acpi_madt_generic_interrupt *processor;
+
+ processor = (struct acpi_madt_generic_interrupt *)header;
+ if (BAD_MADT_ENTRY(processor, end))
+ return -EINVAL;
+
+ acpi_table_print_madt_entry(header);
+
+ acpi_map_gic_cpu_interface(processor);
+
+ return 0;
+}
+#else
+#define acpi_table_parse_madt(...) do { } while (0)
+#endif
+
/*
* Enumerate the possible CPU set from the device tree and build the
* cpu logical map array containing MPIDR values related to logical
* cpus. Assumes that cpu_logical_map(0) has already been initialized.
*/
-void __init of_smp_init_cpus(void)
+void __init of_parse_and_init_cpus(void)
{
struct device_node *dn = NULL;
- unsigned int i, cpu = 1;
- bool bootcpu_valid = false;
while ((dn = of_find_node_by_type(dn, "cpu"))) {
- const u32 *cell;
- u64 hwid;
+ u64 hwid = of_get_cpu_mpidr(dn);
- /*
- * A cpu node with missing "reg" property is
- * considered invalid to build a cpu_logical_map
- * entry.
- */
- cell = of_get_property(dn, "reg", NULL);
- if (!cell) {
- pr_err("%s: missing reg property\n", dn->full_name);
+ if (hwid == INVALID_HWID)
goto next;
- }
- hwid = of_read_number(cell, of_n_addr_cells(dn));
- /*
- * Non affinity bits must be set to 0 in the DT
- */
- if (hwid & ~MPIDR_HWID_BITMASK) {
- pr_err("%s: invalid reg property\n", dn->full_name);
+ if (is_mpidr_duplicate(cpu_count, hwid)) {
+ pr_err("%s: duplicate cpu reg properties in the DT\n",
+ dn->full_name);
goto next;
}
/*
- * Duplicate MPIDRs are a recipe for disaster. Scan
- * all initialized entries and check for
- * duplicates. If any is found just ignore the cpu.
- * cpu_logical_map was initialized to INVALID_HWID to
- * avoid matching valid MPIDR values.
- */
- for (i = 1; (i < cpu) && (i < NR_CPUS); i++) {
- if (cpu_logical_map(i) == hwid) {
- pr_err("%s: duplicate cpu reg properties in the DT\n",
- dn->full_name);
- goto next;
- }
- }
-
- /*
* The numbering scheme requires that the boot CPU
* must be assigned logical id 0. Record it so that
* the logical map built from DT is validated and can
@@ -392,38 +494,58 @@ void __init of_smp_init_cpus(void)
continue;
}
- if (cpu >= NR_CPUS)
- goto next;
-
- if (cpu_read_ops(dn, cpu) != 0)
- goto next;
-
- if (cpu_ops[cpu]->cpu_init(dn, cpu))
+ if (cpu_count >= NR_CPUS)
goto next;
pr_debug("cpu logical map 0x%llx\n", hwid);
- cpu_logical_map(cpu) = hwid;
+ cpu_logical_map(cpu_count) = hwid;
next:
- cpu++;
+ cpu_count++;
}
+}
+
+/*
+ * Enumerate the possible CPU set from the device tree or ACPI and build the
+ * cpu logical map array containing MPIDR values related to logical
+ * cpus. Assumes that cpu_logical_map(0) has already been initialized.
+ */
+void __init smp_init_cpus(void)
+{
+ int i;
- /* sanity check */
- if (cpu > NR_CPUS)
- pr_warning("no. of cores (%d) greater than configured maximum of %d - clipping\n",
- cpu, NR_CPUS);
+ if (acpi_disabled)
+ of_parse_and_init_cpus();
+ else
+ /*
+ * do a walk of MADT to determine how many CPUs
+ * we have including disabled CPUs, and get information
+ * we need for SMP init
+ */
+ acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_INTERRUPT,
+ acpi_parse_gic_cpu_interface, 0);
+
+ if (cpu_count > NR_CPUS)
+ pr_warn("no. of cores (%d) greater than configured maximum of %d - clipping\n",
+ cpu_count, NR_CPUS);
if (!bootcpu_valid) {
- pr_err("DT missing boot CPU MPIDR, not enabling secondaries\n");
+ pr_err("missing boot CPU MPIDR, not enabling secondaries\n");
return;
}
/*
- * All the cpus that made it to the cpu_logical_map have been
- * validated so set them as possible cpus.
+ * We need to set the cpu_logical_map entries before enabling
+ * the cpus so that cpu processor description entries (DT cpu nodes
+ * and ACPI MADT entries) can be retrieved by matching the cpu hwid
+ * with entries in cpu_logical_map while initializing the cpus.
+ * If the cpu set-up fails, invalidate the cpu_logical_map entry.
*/
- for (i = 0; i < NR_CPUS; i++)
- if (cpu_logical_map(i) != INVALID_HWID)
- set_cpu_possible(i, true);
+ for (i = 1; i < NR_CPUS; i++) {
+ if (cpu_logical_map(i) != INVALID_HWID) {
+ if (smp_cpu_setup(i))
+ cpu_logical_map(i) = INVALID_HWID;
+ }
+ }
}
void __init smp_prepare_cpus(unsigned int max_cpus)
diff --git a/arch/arm64/kernel/smp_spin_table.c b/arch/arm64/kernel/smp_spin_table.c
index 14944e5b28da..aef3605a8c47 100644
--- a/arch/arm64/kernel/smp_spin_table.c
+++ b/arch/arm64/kernel/smp_spin_table.c
@@ -49,8 +49,14 @@ static void write_pen_release(u64 val)
}
-static int smp_spin_table_cpu_init(struct device_node *dn, unsigned int cpu)
+static int smp_spin_table_cpu_init(unsigned int cpu)
{
+ struct device_node *dn;
+
+ dn = of_get_cpu_node(cpu, NULL);
+ if (!dn)
+ return -ENODEV;
+
/*
* Determine the address from which the CPU is polling.
*/