id = memregion_alloc(GFP_KERNEL);
if (id < 0) {
diff --git a/include/linux/ioport.h b/include/linux/ioport.h
index e8b2d6aa4013..889bc4982777 100644
--- a/include/linux/ioport.h
+++ b/include/linux/ioport.h
@@ -232,6 +232,9 @@ struct resource_constraint {
/* PC/ISA/whatever - the normal PC address spaces: IO and memory */
extern struct resource ioport_resource;
extern struct resource iomem_resource;
+#ifdef CONFIG_EFI_SOFT_RESERVE
+extern struct resource soft_reserve_resource;
+#endif
extern struct resource *request_resource_conflict(struct resource *root, struct resource *new);
extern int request_resource(struct resource *root, struct resource *new);
@@ -255,6 +258,22 @@ int adjust_resource(struct resource *res, resource_size_t
start,
resource_size_t size);
resource_size_t resource_alignment(struct resource *res);
+
+#ifdef CONFIG_EFI_SOFT_RESERVE
+static inline void insert_resource_late(struct resource *new)
+{
+ if (new->desc == IORES_DESC_SOFT_RESERVED)
+ insert_resource_expand_to_fit(&soft_reserve_resource, new);
+ else
+ insert_resource_expand_to_fit(&iomem_resource, new);
+}
+#else
+static inline void insert_resource_late(struct resource *new)
+{
+ insert_resource_expand_to_fit(&iomem_resource, new);
+}
+#endif
+
/**
* resource_set_size - Calculate resource end address from size and start
* @res: Resource descriptor
@@ -409,6 +428,11 @@ walk_system_ram_res_rev(u64 start, u64 end, void *arg,
extern int
walk_iomem_res_desc(unsigned long desc, unsigned long flags, u64 start, u64
end,
void *arg, int (*func)(struct resource *, void *));
+int walk_soft_reserve_res_desc(unsigned long desc, unsigned long flags,
+ u64 start, u64 end, void *arg,
+ int (*func)(struct resource *, void *));
+int region_intersects_soft_reserve(resource_size_t start, size_t size,
+ unsigned long flags, unsigned long desc);
struct resource *devm_request_free_mem_region(struct device *dev,
struct resource *base, unsigned long size);
diff --git a/kernel/resource.c b/kernel/resource.c
index f9bb5481501a..8479a99441e2 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -321,13 +321,14 @@ static bool is_type_match(struct resource *p, unsigned
long flags, unsigned long
}
/**
- * find_next_iomem_res - Finds the lowest iomem resource that covers part of
- * [@start..@end].
+ * find_next_res - Finds the lowest resource that covers part of
+ * [@start..@end].
*
* If a resource is found, returns 0 and @*res is overwritten with the part
* of the resource that's within [@start..@end]; if none is found, returns
* -ENODEV. Returns -EINVAL for invalid parameters.
*
+ * @parent: resource tree root to search
* @start: start address of the resource searched for
* @end: end address of same resource
* @flags: flags which the resource must have
@@ -337,9 +338,9 @@ static bool is_type_match(struct resource *p, unsigned long
flags, unsigned long
* The caller must specify @start, @end, @flags, and @desc
* (which may be IORES_DESC_NONE).
*/
-static int find_next_iomem_res(resource_size_t start, resource_size_t end,
- unsigned long flags, unsigned long desc,
- struct resource *res)
+static int find_next_res(struct resource *parent, resource_size_t start,
+ resource_size_t end, unsigned long flags,
+ unsigned long desc, struct resource *res)
{
struct resource *p;
@@ -351,7 +352,7 @@ static int find_next_iomem_res(resource_size_t start, resource_size_t end,
read_lock(&resource_lock);
- for_each_resource(&iomem_resource, p, false) {
+ for_each_resource(parent, p, false) {
/* If we passed the resource we are looking for, stop */
if (p->start > end) {
p = NULL;
@@ -382,16 +383,23 @@ static int find_next_iomem_res(resource_size_t start,
resource_size_t end,
return p ? 0 : -ENODEV;
}
-static int __walk_iomem_res_desc(resource_size_t start, resource_size_t end,
- unsigned long flags, unsigned long desc,
- void *arg,
- int (*func)(struct resource *, void *))
+static int find_next_iomem_res(resource_size_t start, resource_size_t end,
+ unsigned long flags, unsigned long desc,
+ struct resource *res)
+{
+ return find_next_res(&iomem_resource, start, end, flags, desc, res);
+}
+
+static int walk_res_desc(struct resource *parent, resource_size_t start,
+ resource_size_t end, unsigned long flags,
+ unsigned long desc, void *arg,
+ int (*func)(struct resource *, void *))
{
struct resource res;
int ret = -EINVAL;
while (start < end &&
- !find_next_iomem_res(start, end, flags, desc, &res)) {
+ !find_next_res(parent, start, end, flags, desc, &res)) {
ret = (*func)(&res, arg);
if (ret)
break;
@@ -402,6 +410,15 @@ static int __walk_iomem_res_desc(resource_size_t start,
resource_size_t end,
return ret;
}
+static int __walk_iomem_res_desc(resource_size_t start, resource_size_t end,
+ unsigned long flags, unsigned long desc,
+ void *arg,
+ int (*func)(struct resource *, void *))
+{
+ return walk_res_desc(&iomem_resource, start, end, flags, desc, arg,
func);
+}
+
+
/**
* walk_iomem_res_desc - Walks through iomem resources and calls func()
* with matching resource ranges.
@@ -426,6 +443,26 @@ int walk_iomem_res_desc(unsigned long desc, unsigned long
flags, u64 start,
}
EXPORT_SYMBOL_GPL(walk_iomem_res_desc);
+#ifdef CONFIG_EFI_SOFT_RESERVE
+struct resource soft_reserve_resource = {
+ .name = "Soft Reserved",
+ .start = 0,
+ .end = -1,
+ .desc = IORES_DESC_SOFT_RESERVED,
+ .flags = IORESOURCE_MEM,
+};
+EXPORT_SYMBOL_GPL(soft_reserve_resource);
+
+int walk_soft_reserve_res_desc(unsigned long desc, unsigned long flags,
+ u64 start, u64 end, void *arg,
+ int (*func)(struct resource *, void *))
+{
+ return walk_res_desc(&soft_reserve_resource, start, end, flags, desc,
+ arg, func);
+}
+EXPORT_SYMBOL_GPL(walk_soft_reserve_res_desc);
+#endif
+
/*
* This function calls the @func callback against all memory ranges of type
* System RAM which are marked as IORESOURCE_SYSTEM_RAM and IORESOUCE_BUSY.
@@ -648,6 +685,20 @@ int region_intersects(resource_size_t start, size_t size,
unsigned long flags,
}
EXPORT_SYMBOL_GPL(region_intersects);
+int region_intersects_soft_reserve(resource_size_t start, size_t size,
+ unsigned long flags, unsigned long desc)
