diff options
Diffstat (limited to 'drivers/s390/char/sclp_cmd.c')
| -rw-r--r-- | drivers/s390/char/sclp_cmd.c | 51 |
1 files changed, 40 insertions, 11 deletions
diff --git a/drivers/s390/char/sclp_cmd.c b/drivers/s390/char/sclp_cmd.c index 11c428f4c7cf..f905a6643a0f 100644 --- a/drivers/s390/char/sclp_cmd.c +++ b/drivers/s390/char/sclp_cmd.c @@ -18,6 +18,7 @@ #include <linux/mm.h> #include <linux/mmzone.h> #include <linux/memory.h> +#include <linux/memory_hotplug.h> #include <linux/module.h> #include <asm/ctlreg.h> #include <asm/chpid.h> @@ -26,9 +27,13 @@ #include <asm/sclp.h> #include <asm/numa.h> #include <asm/facility.h> +#include <asm/page-states.h> #include "sclp.h" +#define SCLP_CMDW_ASSIGN_STORAGE 0x000d0001 +#define SCLP_CMDW_UNASSIGN_STORAGE 0x000c0001 + static void sclp_sync_callback(struct sclp_req *req, void *data) { struct completion *completion = data; @@ -223,7 +228,7 @@ static int sclp_assign_storage(u16 rn) unsigned long long start; int rc; - rc = do_assign_storage(0x000d0001, rn); + rc = do_assign_storage(SCLP_CMDW_ASSIGN_STORAGE, rn); if (rc) return rc; start = rn2addr(rn); @@ -233,7 +238,7 @@ static int sclp_assign_storage(u16 rn) static int sclp_unassign_storage(u16 rn) { - return do_assign_storage(0x000c0001, rn); + return do_assign_storage(SCLP_CMDW_UNASSIGN_STORAGE, rn); } struct attach_storage_sccb { @@ -340,16 +345,38 @@ static int sclp_mem_notifier(struct notifier_block *nb, if (contains_standby_increment(start, start + size)) rc = -EPERM; break; - case MEM_ONLINE: - case MEM_CANCEL_OFFLINE: - break; - case MEM_GOING_ONLINE: + case MEM_PREPARE_ONLINE: + /* + * Access the altmap_start_pfn and altmap_nr_pages fields + * within the struct memory_notify specifically when dealing + * with only MEM_PREPARE_ONLINE/MEM_FINISH_OFFLINE notifiers. + * + * When altmap is in use, take the specified memory range + * online, which includes the altmap. + */ + if (arg->altmap_nr_pages) { + start = PFN_PHYS(arg->altmap_start_pfn); + size += PFN_PHYS(arg->altmap_nr_pages); + } rc = sclp_mem_change_state(start, size, 1); + if (rc || !arg->altmap_nr_pages) + break; + /* + * Set CMMA state to nodat here, since the struct page memory + * at the beginning of the memory block will not go through the + * buddy allocator later. + */ + __arch_set_page_nodat((void *)__va(start), arg->altmap_nr_pages); break; - case MEM_CANCEL_ONLINE: - sclp_mem_change_state(start, size, 0); - break; - case MEM_OFFLINE: + case MEM_FINISH_OFFLINE: + /* + * When altmap is in use, take the specified memory range + * offline, which includes the altmap. + */ + if (arg->altmap_nr_pages) { + start = PFN_PHYS(arg->altmap_start_pfn); + size += PFN_PHYS(arg->altmap_nr_pages); + } sclp_mem_change_state(start, size, 0); break; default: @@ -400,7 +427,9 @@ static void __init add_memory_merged(u16 rn) if (!size) goto skip_add; for (addr = start; addr < start + size; addr += block_size) - add_memory(0, addr, block_size, MHP_NONE); + add_memory(0, addr, block_size, + MACHINE_HAS_EDAT1 ? + MHP_MEMMAP_ON_MEMORY | MHP_OFFLINE_INACCESSIBLE : MHP_NONE); skip_add: first_rn = rn; num = 1; |