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Diffstat (limited to 'arch/powerpc/kernel/setup-common.c')
-rw-r--r--arch/powerpc/kernel/setup-common.c131
1 files changed, 77 insertions, 54 deletions
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 9b10e57040c6..c8c42b419742 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -22,7 +22,6 @@
#include <linux/seq_file.h>
#include <linux/ioport.h>
#include <linux/console.h>
-#include <linux/screen_info.h>
#include <linux/root_dev.h>
#include <linux/cpu.h>
#include <linux/unistd.h>
@@ -31,11 +30,12 @@
#include <linux/serial_8250.h>
#include <linux/percpu.h>
#include <linux/memblock.h>
-#include <linux/of_irq.h>
+#include <linux/of.h>
#include <linux/of_fdt.h>
-#include <linux/of_platform.h>
+#include <linux/of_irq.h>
#include <linux/hugetlb.h>
#include <linux/pgtable.h>
+#include <asm/kexec.h>
#include <asm/io.h>
#include <asm/paca.h>
#include <asm/processor.h>
@@ -68,6 +68,7 @@
#include <asm/cpu_has_feature.h>
#include <asm/kasan.h>
#include <asm/mce.h>
+#include <asm/systemcfg.h>
#include "setup.h"
@@ -86,6 +87,11 @@ EXPORT_SYMBOL(machine_id);
int boot_cpuid = -1;
EXPORT_SYMBOL_GPL(boot_cpuid);
+int __initdata boot_core_hwid = -1;
+
+#ifdef CONFIG_PPC64
+int boot_cpu_hwid = -1;
+#endif
/*
* These are used in binfmt_elf.c to put aux entries on the stack
@@ -94,21 +100,6 @@ EXPORT_SYMBOL_GPL(boot_cpuid);
int dcache_bsize;
int icache_bsize;
-/*
- * This still seems to be needed... -- paulus
- */
-struct screen_info screen_info = {
- .orig_x = 0,
- .orig_y = 25,
- .orig_video_cols = 80,
- .orig_video_lines = 25,
- .orig_video_isVGA = 1,
- .orig_video_points = 16
-};
-#if defined(CONFIG_FB_VGA16_MODULE)
-EXPORT_SYMBOL(screen_info);
-#endif
-
/* Variables required to store legacy IO irq routing */
int of_i8042_kbd_irq;
EXPORT_SYMBOL_GPL(of_i8042_kbd_irq);
@@ -121,7 +112,7 @@ int ppc_do_canonicalize_irqs;
EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
#endif
-#ifdef CONFIG_CRASH_CORE
+#ifdef CONFIG_CRASH_DUMP
/* This keeps a track of which one is the crashing cpu. */
int crashing_cpu = -1;
#endif
@@ -416,13 +407,32 @@ static void __init cpu_init_thread_core_maps(int tpc)
cpumask_set_cpu(i, &threads_core_mask);
printk(KERN_INFO "CPU maps initialized for %d thread%s per core\n",
- tpc, tpc > 1 ? "s" : "");
+ tpc, str_plural(tpc));
printk(KERN_DEBUG " (thread shift is %d)\n", threads_shift);
}
u32 *cpu_to_phys_id = NULL;
+static int assign_threads(unsigned int cpu, unsigned int nthreads, bool present,
+ const __be32 *hw_ids)
+{
+ for (int i = 0; i < nthreads && cpu < nr_cpu_ids; i++) {
+ __be32 hwid;
+
+ hwid = be32_to_cpu(hw_ids[i]);
+
+ DBG(" thread %d -> cpu %d (hard id %d)\n", i, cpu, hwid);
+
+ set_cpu_present(cpu, present);
+ set_cpu_possible(cpu, true);
+ cpu_to_phys_id[cpu] = hwid;
+ cpu++;
+ }
+
+ return cpu;
+}
+
/**
* setup_cpu_maps - initialize the following cpu maps:
* cpu_possible_mask
@@ -449,16 +459,13 @@ void __init smp_setup_cpu_maps(void)
DBG("smp_setup_cpu_maps()\n");
- cpu_to_phys_id = memblock_alloc(nr_cpu_ids * sizeof(u32),
+ cpu_to_phys_id = memblock_alloc_or_panic(nr_cpu_ids * sizeof(u32),
__alignof__(u32));
- if (!cpu_to_phys_id)
- panic("%s: Failed to allocate %zu bytes align=0x%zx\n",
- __func__, nr_cpu_ids * sizeof(u32), __alignof__(u32));
for_each_node_by_type(dn, "cpu") {
const __be32 *intserv;
__be32 cpu_be;
- int j, len;
+ int len;
DBG(" * %pOF...\n", dn);
@@ -480,27 +487,31 @@ void __init smp_setup_cpu_maps(void)
nthreads = len / sizeof(int);
- for (j = 0; j < nthreads && cpu < nr_cpu_ids; j++) {
- bool avail;
+ bool avail = of_device_is_available(dn);
+ if (!avail)
+ avail = !of_property_match_string(dn,
+ "enable-method", "spin-table");
- DBG(" thread %d -> cpu %d (hard id %d)\n",
- j, cpu, be32_to_cpu(intserv[j]));
-
- avail = of_device_is_available(dn);
- if (!avail)
- avail = !of_property_match_string(dn,
- "enable-method", "spin-table");
-
- set_cpu_present(cpu, avail);
- set_cpu_possible(cpu, true);
- cpu_to_phys_id[cpu] = be32_to_cpu(intserv[j]);
- cpu++;
- }
+ if (boot_core_hwid >= 0) {
+ if (cpu == 0) {
+ pr_info("Skipping CPU node %pOF to allow for boot core.\n", dn);
+ cpu = nthreads;
+ continue;
+ }
- if (cpu >= nr_cpu_ids) {
+ if (be32_to_cpu(intserv[0]) == boot_core_hwid) {
+ pr_info("Renumbered boot core %pOF to logical 0\n", dn);
+ assign_threads(0, nthreads, avail, intserv);
+ of_node_put(dn);
+ break;
+ }
+ } else if (cpu >= nr_cpu_ids) {
of_node_put(dn);
break;
}
+
+ if (cpu < nr_cpu_ids)
+ cpu = assign_threads(cpu, nthreads, avail, intserv);
}
/* If no SMT supported, nthreads is forced to 1 */
@@ -548,7 +559,9 @@ void __init smp_setup_cpu_maps(void)
out:
of_node_put(dn);
}
- vdso_data->processorCount = num_present_cpus();
+#endif
+#ifdef CONFIG_PPC64_PROC_SYSTEMCFG
+ systemcfg->processorCount = num_present_cpus();
#endif /* CONFIG_PPC64 */
/* Initialize CPU <=> thread mapping/
@@ -597,7 +610,6 @@ struct seq_buf ppc_hw_desc __initdata = {
.buffer = ppc_hw_desc_buf,
.size = sizeof(ppc_hw_desc_buf),
.len = 0,
- .readpos = 0,
};
static __init void probe_machine(void)
@@ -626,13 +638,16 @@ static __init void probe_machine(void)
for (machine_id = &__machine_desc_start;
machine_id < &__machine_desc_end;
machine_id++) {
- DBG(" %s ...", machine_id->name);
+ DBG(" %s ...\n", machine_id->name);
+ if (machine_id->compatible && !of_machine_is_compatible(machine_id->compatible))
+ continue;
+ if (machine_id->compatibles && !of_machine_compatible_match(machine_id->compatibles))
+ continue;
memcpy(&ppc_md, machine_id, sizeof(struct machdep_calls));
- if (ppc_md.probe()) {
- DBG(" match !\n");
- break;
- }
- DBG("\n");
+ if (ppc_md.probe && !ppc_md.probe())
+ continue;
+ DBG(" %s match !\n", machine_id->name);
+ break;
}
/* What can we do if we didn't find ? */
if (machine_id >= &__machine_desc_end) {
@@ -817,8 +832,8 @@ static int __init check_cache_coherency(void)
if (devtree_coherency != KERNEL_COHERENCY) {
printk(KERN_ERR
"kernel coherency:%s != device tree_coherency:%s\n",
- KERNEL_COHERENCY ? "on" : "off",
- devtree_coherency ? "on" : "off");
+ str_on_off(KERNEL_COHERENCY),
+ str_on_off(devtree_coherency));
BUG();
}
@@ -943,6 +958,7 @@ void __init setup_arch(char **cmdline_p)
/* Parse memory topology */
mem_topology_setup();
+ high_memory = (void *)__va(max_low_pfn * PAGE_SIZE);
/*
* Release secondary cpus out of their spinloops at 0x60 now that
@@ -964,8 +980,12 @@ void __init setup_arch(char **cmdline_p)
klp_init_thread_info(&init_task);
setup_initial_init_mm(_stext, _etext, _edata, _end);
-
+ /* sched_init() does the mmgrab(&init_mm) for the primary CPU */
+ VM_WARN_ON(cpumask_test_cpu(smp_processor_id(), mm_cpumask(&init_mm)));
+ cpumask_set_cpu(smp_processor_id(), mm_cpumask(&init_mm));
+ inc_mm_active_cpus(&init_mm);
mm_iommu_init(&init_mm);
+
irqstack_early_init();
exc_lvl_early_init();
emergency_stack_init();
@@ -976,9 +996,12 @@ void __init setup_arch(char **cmdline_p)
initmem_init();
/*
- * Reserve large chunks of memory for use by CMA for KVM and hugetlb. These must
- * be called after initmem_init(), so that pageblock_order is initialised.
+ * Reserve large chunks of memory for use by CMA for kdump, fadump, KVM and
+ * hugetlb. These must be called after initmem_init(), so that
+ * pageblock_order is initialised.
*/
+ fadump_cma_init();
+ kdump_cma_reserve();
kvm_cma_reserve();
gigantic_hugetlb_cma_reserve();
generated by cgit (git 2.34.1) at 2025-12-21 18:33:09 +0000