static bool lmb_is_removable(struct of_drconf_cell *lmb)
{
int i, scns_per_block;
int rc = 1;
unsigned long pfn, block_sz;
u64 phys_addr;
if (!(lmb->flags & DRCONF_MEM_ASSIGNED))
return false;
block_sz = memory_block_size_bytes();
scns_per_block = block_sz / MIN_MEMORY_BLOCK_SIZE;
phys_addr = lmb->base_addr;
for (i = 0; i < scns_per_block; i++) {
pfn = PFN_DOWN(phys_addr);
if (!pfn_present(pfn))
continue;
rc &= is_mem_section_removable(pfn, PAGES_PER_SECTION);
phys_addr += MIN_MEMORY_BLOCK_SIZE;
}
return rc ? true : false;
}
/*
* Show whether the section of memory is likely to be hot-removable
*/
static ssize_t show_mem_removable(struct sys_device *dev,
struct sysdev_attribute *attr, char *buf)
{
unsigned long start_pfn;
int ret;
struct memory_block *mem =
container_of(dev, struct memory_block, sysdev);
start_pfn = section_nr_to_pfn(mem->phys_index);
ret = is_mem_section_removable(start_pfn, PAGES_PER_SECTION);
return sprintf(buf, "%d\n", ret);
}
/*
* Show whether the section of memory is likely to be hot-removable
*/
static ssize_t show_mem_removable(struct sys_device *dev,
struct sysdev_attribute *attr, char *buf)
{
unsigned long i, pfn;
int ret = 1;
struct memory_block *mem =
container_of(dev, struct memory_block, sysdev);
for (i = 0; i < sections_per_block; i++) {
pfn = section_nr_to_pfn(mem->start_section_nr + i);
ret &= is_mem_section_removable(pfn, PAGES_PER_SECTION);
}
return sprintf(buf, "%d\n", ret);
}
/*
* Show whether the section of memory is likely to be hot-removable
*/
static ssize_t show_mem_removable(struct device *dev,
struct device_attribute *attr, char *buf)
{
unsigned long i, pfn;
int ret = 1;
struct memory_block *mem = to_memory_block(dev);
for (i = 0; i < sections_per_block; i++) {
if (!present_section_nr(mem->start_section_nr + i))
continue;
pfn = section_nr_to_pfn(mem->start_section_nr + i);
ret &= is_mem_section_removable(pfn, PAGES_PER_SECTION);
}
return sprintf(buf, "%d\n", ret);
}
