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authorLinus Torvalds <torvalds@linux-foundation.org>2020-08-03 13:58:10 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-03 13:58:10 -0700
commit45365a06aa305c9eca1cbf48aef48a7a0cea3b4e (patch)
treeaa3e1cdbe77aab1ac5f16cbaaa8ed9147df82efe /mm
parentcdc8fcb49905c0b67e355e027cb462ee168ffaa3 (diff)
parent9a996c67a65d937b23408e56935ef23404c9418e (diff)
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Merge tag 's390-5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 updates from Heiko Carstens: - Add support for function error injection. - Add support for custom exception handlers, as required by BPF_PROBE_MEM. - Add support for BPF_PROBE_MEM. - Add trace events for idle enter / exit for the s390 specific idle implementation. - Remove unused zcore memmmap device. - Remove unused "raw view" from s390 debug feature. - AP bus + zcrypt device driver code refactoring. - Provide cex4 cca sysfs attributes for cex3 for zcrypt device driver. - Expose only minimal interface to walk physmem for mm/memblock. This is a common code change and it has been agreed on with Mike Rapoport and Andrew Morton that this can go upstream via the s390 tree. - Rework of the s390 vmem/vmmemap code to allow for future memory hot remove. - Get rid of FORCE_MAX_ZONEORDER to finally allow for order-10 allocations again, instead of only order-8 allocations. - Various small improvements and fixes. * tag 's390-5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (48 commits) s390/vmemmap: coding style updates s390/vmemmap: avoid memset(PAGE_UNUSED) when adding consecutive sections s390/vmemmap: remember unused sub-pmd ranges s390/vmemmap: fallback to PTEs if mapping large PMD fails s390/vmem: cleanup empty page tables s390/vmemmap: take the vmem_mutex when populating/freeing s390/vmemmap: cleanup when vmemmap_populate() fails s390/vmemmap: extend modify_pagetable() to handle vmemmap s390/vmem: consolidate vmem_add_range() and vmem_remove_range() s390/vmem: rename vmem_add_mem() to vmem_add_range() s390: enable HAVE_FUNCTION_ERROR_INJECTION s390/pci: clarify comment in s390_mmio_read/write s390/time: improve comparison for tod steering s390/time: select CLOCKSOURCE_VALIDATE_LAST_CYCLE s390/time: use CLOCKSOURCE_MASK s390/bpf: implement BPF_PROBE_MEM s390/kernel: expand exception table logic to allow new handling options s390/kernel: unify EX_TABLE* implementations s390/mm: allow order 10 allocations s390/mm: avoid trimming to MAX_ORDER ...
Diffstat (limited to 'mm')
-rw-r--r--mm/memblock.c57
1 files changed, 29 insertions, 28 deletions
diff --git a/mm/memblock.c b/mm/memblock.c
index 39aceafc57f6..45f198750be9 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -44,19 +44,20 @@
* in the system, for instance when the memory is restricted with
* ``mem=`` command line parameter
* * ``reserved`` - describes the regions that were allocated
- * * ``physmap`` - describes the actual physical memory regardless of
- * the possible restrictions; the ``physmap`` type is only available
- * on some architectures.
+ * * ``physmem`` - describes the actual physical memory available during
+ * boot regardless of the possible restrictions and memory hot(un)plug;
+ * the ``physmem`` type is only available on some architectures.
*
* Each region is represented by :c:type:`struct memblock_region` that
* defines the region extents, its attributes and NUMA node id on NUMA
* systems. Every memory type is described by the :c:type:`struct
* memblock_type` which contains an array of memory regions along with
- * the allocator metadata. The memory types are nicely wrapped with
- * :c:type:`struct memblock`. This structure is statically initialzed
- * at build time. The region arrays for the "memory" and "reserved"
- * types are initially sized to %INIT_MEMBLOCK_REGIONS and for the
- * "physmap" type to %INIT_PHYSMEM_REGIONS.
+ * the allocator metadata. The "memory" and "reserved" types are nicely
+ * wrapped with :c:type:`struct memblock`. This structure is statically
+ * initialized at build time. The region arrays are initially sized to
+ * %INIT_MEMBLOCK_REGIONS for "memory" and %INIT_MEMBLOCK_RESERVED_REGIONS
+ * for "reserved". The region array for "physmem" is initially sized to
+ * %INIT_PHYSMEM_REGIONS.
* The memblock_allow_resize() enables automatic resizing of the region
* arrays during addition of new regions. This feature should be used
* with care so that memory allocated for the region array will not
@@ -87,8 +88,8 @@
* function frees all the memory to the buddy page allocator.
*
* Unless an architecture enables %CONFIG_ARCH_KEEP_MEMBLOCK, the
- * memblock data structures will be discarded after the system
- * initialization completes.
+ * memblock data structures (except "physmem") will be discarded after the
+ * system initialization completes.
*/
#ifndef CONFIG_NEED_MULTIPLE_NODES
@@ -104,7 +105,7 @@ unsigned long long max_possible_pfn;
static struct memblock_region memblock_memory_init_regions[INIT_MEMBLOCK_REGIONS] __initdata_memblock;
static struct memblock_region memblock_reserved_init_regions[INIT_MEMBLOCK_RESERVED_REGIONS] __initdata_memblock;
#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
-static struct memblock_region memblock_physmem_init_regions[INIT_PHYSMEM_REGIONS] __initdata_memblock;
+static struct memblock_region memblock_physmem_init_regions[INIT_PHYSMEM_REGIONS];
#endif
struct memblock memblock __initdata_memblock = {
@@ -118,17 +119,19 @@ struct memblock memblock __initdata_memblock = {
.reserved.max = INIT_MEMBLOCK_RESERVED_REGIONS,
.reserved.name = "reserved",
-#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
- .physmem.regions = memblock_physmem_init_regions,
- .physmem.cnt = 1, /* empty dummy entry */
- .physmem.max = INIT_PHYSMEM_REGIONS,
- .physmem.name = "physmem",
-#endif
-
.bottom_up = false,
.current_limit = MEMBLOCK_ALLOC_ANYWHERE,
};
+#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
+struct memblock_type physmem = {
+ .regions = memblock_physmem_init_regions,
+ .cnt = 1, /* empty dummy entry */
+ .max = INIT_PHYSMEM_REGIONS,
+ .name = "physmem",
+};
+#endif
+
int memblock_debug __initdata_memblock;
static bool system_has_some_mirror __initdata_memblock = false;
static int memblock_can_resize __initdata_memblock;
@@ -838,7 +841,7 @@ int __init_memblock memblock_physmem_add(phys_addr_t base, phys_addr_t size)
memblock_dbg("%s: [%pa-%pa] %pS\n", __func__,
&base, &end, (void *)_RET_IP_);
- return memblock_add_range(&memblock.physmem, base, size, MAX_NUMNODES, 0);
+ return memblock_add_range(&physmem, base, size, MAX_NUMNODES, 0);
}
#endif
@@ -1019,12 +1022,10 @@ static bool should_skip_region(struct memblock_region *m, int nid, int flags)
* As both region arrays are sorted, the function advances the two indices
* in lockstep and returns each intersection.
*/
-void __init_memblock __next_mem_range(u64 *idx, int nid,
- enum memblock_flags flags,
- struct memblock_type *type_a,
- struct memblock_type *type_b,
- phys_addr_t *out_start,
- phys_addr_t *out_end, int *out_nid)
+void __next_mem_range(u64 *idx, int nid, enum memblock_flags flags,
+ struct memblock_type *type_a,
+ struct memblock_type *type_b, phys_addr_t *out_start,
+ phys_addr_t *out_end, int *out_nid)
{
int idx_a = *idx & 0xffffffff;
int idx_b = *idx >> 32;
@@ -1924,7 +1925,7 @@ void __init_memblock __memblock_dump_all(void)
memblock_dump(&memblock.memory);
memblock_dump(&memblock.reserved);
#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
- memblock_dump(&memblock.physmem);
+ memblock_dump(&physmem);
#endif
}
@@ -2064,8 +2065,8 @@ static int __init memblock_init_debugfs(void)
debugfs_create_file("reserved", 0444, root,
&memblock.reserved, &memblock_debug_fops);
#ifdef CONFIG_HAVE_MEMBLOCK_PHYS_MAP
- debugfs_create_file("physmem", 0444, root,
- &memblock.physmem, &memblock_debug_fops);
+ debugfs_create_file("physmem", 0444, root, &physmem,
+ &memblock_debug_fops);
#endif
return 0;