arch/powerpc/platforms/pseries/dlpar.c

Source file repositories/reference/linux-study-clean/arch/powerpc/platforms/pseries/dlpar.c

File Facts

System
Linux kernel
Corpus path
arch/powerpc/platforms/pseries/dlpar.c
Extension
.c
Size
16820 bytes
Lines
829
Domain
Architecture Layer
Bucket
arch/powerpc
Inferred role
Architecture Layer: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

struct pseries_hp_work {
	struct work_struct work;
	struct pseries_hp_errorlog *errlog;
};

struct cc_workarea {
	__be32	drc_index;
	__be32	zero;
	__be32	name_offset;
	__be32	prop_length;
	__be32	prop_offset;
};

void dlpar_free_cc_property(struct property *prop)
{
	kfree(prop->name);
	kfree(prop->value);
	kfree(prop);
}

static struct property *dlpar_parse_cc_property(struct cc_workarea *ccwa)
{
	struct property *prop;
	char *name;
	char *value;

	prop = kzalloc_obj(*prop);
	if (!prop)
		return NULL;

	name = (char *)ccwa + be32_to_cpu(ccwa->name_offset);
	prop->name = kstrdup(name, GFP_KERNEL);
	if (!prop->name) {
		dlpar_free_cc_property(prop);
		return NULL;
	}

	prop->length = be32_to_cpu(ccwa->prop_length);
	value = (char *)ccwa + be32_to_cpu(ccwa->prop_offset);
	prop->value = kmemdup(value, prop->length, GFP_KERNEL);
	if (!prop->value) {
		dlpar_free_cc_property(prop);
		return NULL;
	}

	return prop;
}

static struct device_node *dlpar_parse_cc_node(struct cc_workarea *ccwa)
{
	struct device_node *dn;
	const char *name;

	dn = kzalloc_obj(*dn);
	if (!dn)
		return NULL;

	name = (const char *)ccwa + be32_to_cpu(ccwa->name_offset);
	dn->full_name = kstrdup(name, GFP_KERNEL);
	if (!dn->full_name) {
		kfree(dn);
		return NULL;
	}

	of_node_set_flag(dn, OF_DYNAMIC);
	of_node_init(dn);

	return dn;
}

static void dlpar_free_one_cc_node(struct device_node *dn)
{
	struct property *prop;

	while (dn->properties) {
		prop = dn->properties;
		dn->properties = prop->next;
		dlpar_free_cc_property(prop);
	}

	kfree(dn->full_name);
	kfree(dn);
}

void dlpar_free_cc_nodes(struct device_node *dn)
{
	if (dn->child)
		dlpar_free_cc_nodes(dn->child);

	if (dn->sibling)

Annotation

Implementation Notes