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Diffstat (limited to 'arch/arm64/mm/init.c')
-rw-r--r--arch/arm64/mm/init.c112
1 files changed, 89 insertions, 23 deletions
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index ea989d83ea9b..d45f8627012c 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -40,6 +40,7 @@
#include <asm/kasan.h>
#include <asm/kernel-pgtable.h>
#include <asm/memory.h>
+#include <asm/numa.h>
#include <asm/sections.h>
#include <asm/setup.h>
#include <asm/sizes.h>
@@ -86,6 +87,21 @@ static phys_addr_t __init max_zone_dma_phys(void)
return min(offset + (1ULL << 32), memblock_end_of_DRAM());
}
+#ifdef CONFIG_NUMA
+
+static void __init zone_sizes_init(unsigned long min, unsigned long max)
+{
+ unsigned long max_zone_pfns[MAX_NR_ZONES] = {0};
+
+ if (IS_ENABLED(CONFIG_ZONE_DMA))
+ max_zone_pfns[ZONE_DMA] = PFN_DOWN(max_zone_dma_phys());
+ max_zone_pfns[ZONE_NORMAL] = max;
+
+ free_area_init_nodes(max_zone_pfns);
+}
+
+#else
+
static void __init zone_sizes_init(unsigned long min, unsigned long max)
{
struct memblock_region *reg;
@@ -126,6 +142,8 @@ static void __init zone_sizes_init(unsigned long min, unsigned long max)
free_area_init_node(0, zone_size, min, zhole_size);
}
+#endif /* CONFIG_NUMA */
+
#ifdef CONFIG_HAVE_ARCH_PFN_VALID
int pfn_valid(unsigned long pfn)
{
@@ -142,10 +160,15 @@ static void __init arm64_memory_present(void)
static void __init arm64_memory_present(void)
{
struct memblock_region *reg;
+ int nid = 0;
- for_each_memblock(memory, reg)
- memory_present(0, memblock_region_memory_base_pfn(reg),
- memblock_region_memory_end_pfn(reg));
+ for_each_memblock(memory, reg) {
+#ifdef CONFIG_NUMA
+ nid = reg->nid;
+#endif
+ memory_present(nid, memblock_region_memory_base_pfn(reg),
+ memblock_region_memory_end_pfn(reg));
+ }
}
#endif
@@ -190,8 +213,12 @@ void __init arm64_memblock_init(void)
*/
memblock_remove(max_t(u64, memstart_addr + linear_region_size, __pa(_end)),
ULLONG_MAX);
- if (memblock_end_of_DRAM() > linear_region_size)
- memblock_remove(0, memblock_end_of_DRAM() - linear_region_size);
+ if (memstart_addr + linear_region_size < memblock_end_of_DRAM()) {
+ /* ensure that memstart_addr remains sufficiently aligned */
+ memstart_addr = round_up(memblock_end_of_DRAM() - linear_region_size,
+ ARM64_MEMSTART_ALIGN);
+ memblock_remove(0, memstart_addr);
+ }
/*
* Apply the memory limit if it was set. Since the kernel may be loaded
@@ -203,6 +230,35 @@ void __init arm64_memblock_init(void)
memblock_add(__pa(_text), (u64)(_end - _text));
}
+ if (IS_ENABLED(CONFIG_BLK_DEV_INITRD) && initrd_start) {
+ /*
+ * Add back the memory we just removed if it results in the
+ * initrd to become inaccessible via the linear mapping.
+ * Otherwise, this is a no-op
+ */
+ u64 base = initrd_start & PAGE_MASK;
+ u64 size = PAGE_ALIGN(initrd_end) - base;
+
+ /*
+ * We can only add back the initrd memory if we don't end up
+ * with more memory than we can address via the linear mapping.
+ * It is up to the bootloader to position the kernel and the
+ * initrd reasonably close to each other (i.e., within 32 GB of
+ * each other) so that all granule/#levels combinations can
+ * always access both.
+ */
+ if (WARN(base < memblock_start_of_DRAM() ||
+ base + size > memblock_start_of_DRAM() +
+ linear_region_size,
+ "initrd not fully accessible via the linear mapping -- please check your bootloader ...\n")) {
+ initrd_start = 0;
+ } else {
+ memblock_remove(base, size); /* clear MEMBLOCK_ flags */
+ memblock_add(base, size);
+ memblock_reserve(base, size);
+ }
+ }
+
if (IS_ENABLED(CONFIG_RANDOMIZE_BASE)) {
extern u16 memstart_offset_seed;
u64 range = linear_region_size -
@@ -245,7 +301,6 @@ void __init arm64_memblock_init(void)
dma_contiguous_reserve(arm64_dma_phys_limit);
memblock_allow_resize();
- memblock_dump_all();
}
void __init bootmem_init(void)
@@ -257,6 +312,9 @@ void __init bootmem_init(void)
early_memtest(min << PAGE_SHIFT, max << PAGE_SHIFT);
+ max_pfn = max_low_pfn = max;
+
+ arm64_numa_init();
/*
* Sparsemem tries to allocate bootmem in memory_present(), so must be
* done after the fixed reservations.
@@ -267,7 +325,7 @@ void __init bootmem_init(void)
zone_sizes_init(min, max);
high_memory = __va((max << PAGE_SHIFT) - 1) + 1;
- max_pfn = max_low_pfn = max;
+ memblock_dump_all();
}
#ifndef CONFIG_SPARSEMEM_VMEMMAP
@@ -371,26 +429,27 @@ void __init mem_init(void)
MLM(MODULES_VADDR, MODULES_END));
pr_cont(" vmalloc : 0x%16lx - 0x%16lx (%6ld GB)\n",
MLG(VMALLOC_START, VMALLOC_END));
- pr_cont(" .text : 0x%p" " - 0x%p" " (%6ld KB)\n"
- " .rodata : 0x%p" " - 0x%p" " (%6ld KB)\n"
- " .init : 0x%p" " - 0x%p" " (%6ld KB)\n"
- " .data : 0x%p" " - 0x%p" " (%6ld KB)\n",
- MLK_ROUNDUP(_text, __start_rodata),
- MLK_ROUNDUP(__start_rodata, _etext),
- MLK_ROUNDUP(__init_begin, __init_end),
+ pr_cont(" .text : 0x%p" " - 0x%p" " (%6ld KB)\n",
+ MLK_ROUNDUP(_text, __start_rodata));
+ pr_cont(" .rodata : 0x%p" " - 0x%p" " (%6ld KB)\n",
+ MLK_ROUNDUP(__start_rodata, _etext));
+ pr_cont(" .init : 0x%p" " - 0x%p" " (%6ld KB)\n",
+ MLK_ROUNDUP(__init_begin, __init_end));
+ pr_cont(" .data : 0x%p" " - 0x%p" " (%6ld KB)\n",
MLK_ROUNDUP(_sdata, _edata));
-#ifdef CONFIG_SPARSEMEM_VMEMMAP
- pr_cont(" vmemmap : 0x%16lx - 0x%16lx (%6ld GB maximum)\n"
- " 0x%16lx - 0x%16lx (%6ld MB actual)\n",
- MLG(VMEMMAP_START,
- VMEMMAP_START + VMEMMAP_SIZE),
- MLM((unsigned long)phys_to_page(memblock_start_of_DRAM()),
- (unsigned long)virt_to_page(high_memory)));
-#endif
+ pr_cont(" .bss : 0x%p" " - 0x%p" " (%6ld KB)\n",
+ MLK_ROUNDUP(__bss_start, __bss_stop));
pr_cont(" fixed : 0x%16lx - 0x%16lx (%6ld KB)\n",
MLK(FIXADDR_START, FIXADDR_TOP));
pr_cont(" PCI I/O : 0x%16lx - 0x%16lx (%6ld MB)\n",
MLM(PCI_IO_START, PCI_IO_END));
+#ifdef CONFIG_SPARSEMEM_VMEMMAP
+ pr_cont(" vmemmap : 0x%16lx - 0x%16lx (%6ld GB maximum)\n",
+ MLG(VMEMMAP_START, VMEMMAP_START + VMEMMAP_SIZE));
+ pr_cont(" 0x%16lx - 0x%16lx (%6ld MB actual)\n",
+ MLM((unsigned long)phys_to_page(memblock_start_of_DRAM()),
+ (unsigned long)virt_to_page(high_memory)));
+#endif
pr_cont(" memory : 0x%16lx - 0x%16lx (%6ld MB)\n",
MLM(__phys_to_virt(memblock_start_of_DRAM()),
(unsigned long)high_memory));
@@ -407,6 +466,12 @@ void __init mem_init(void)
BUILD_BUG_ON(TASK_SIZE_32 > TASK_SIZE_64);
#endif
+ /*
+ * Make sure we chose the upper bound of sizeof(struct page)
+ * correctly.
+ */
+ BUILD_BUG_ON(sizeof(struct page) > (1 << STRUCT_PAGE_MAX_SHIFT));
+
if (PAGE_SIZE >= 16384 && get_num_physpages() <= 128) {
extern int sysctl_overcommit_memory;
/*
@@ -419,7 +484,8 @@ void __init mem_init(void)
void free_initmem(void)
{
- free_initmem_default(0);
+ free_reserved_area(__va(__pa(__init_begin)), __va(__pa(__init_end)),
+ 0, "unused kernel");
fixup_init();
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.