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e7e846dc6c
linux/arch/powerpc/mm
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Christophe Leroy e7e846dc6c powerpc/mm: Fix boot warning with hugepages and CONFIG_DEBUG_VIRTUAL 
Booting with CONFIG_DEBUG_VIRTUAL leads to following warning when
passing hugepage reservation on command line:

  Kernel command line: hugepagesz=1g hugepages=1 hugepagesz=64m hugepages=1 hugepagesz=256m hugepages=1 noreboot
  HugeTLB: allocating 1 of page size 1.00 GiB failed.  Only allocated 0 hugepages.
  ------------[ cut here ]------------
  WARNING: CPU: 0 PID: 0 at arch/powerpc/include/asm/io.h:948 __alloc_bootmem_huge_page+0xd4/0x284
  Modules linked in:
  CPU: 0 PID: 0 Comm: swapper Not tainted 6.10.0-rc6-00396-g6b0e82791bd0-dirty #936
  Hardware name: MPC8544DS e500v2 0x80210030 MPC8544 DS
  NIP:  c1020240 LR: c10201d0 CTR: 00000000
  REGS: c13fdd30 TRAP: 0700   Not tainted  (6.10.0-rc6-00396-g6b0e82791bd0-dirty)
  MSR:  00021000 <CE,ME>  CR: 44084288  XER: 20000000

  GPR00: c10201d0 c13fde20 c130b560 e8000000 e8001000 00000000 00000000 c1420000
  GPR08: 00000000 00028001 00000000 00000004 44084282 01066ac0 c0eb7c9c efffe149
  GPR16: c0fc4228 0000005f ffffffff c0eb7d0c c0eb7cc0 c0eb7ce0 ffffffff 00000000
  GPR24: c1441cec efffe153 e8001000 c14240c0 00000000 c1441d64 00000000 e8000000
  NIP [c1020240] __alloc_bootmem_huge_page+0xd4/0x284
  LR [c10201d0] __alloc_bootmem_huge_page+0x64/0x284
  Call Trace:
  [c13fde20] [c10201d0] __alloc_bootmem_huge_page+0x64/0x284 (unreliable)
  [c13fde50] [c10207b8] hugetlb_hstate_alloc_pages+0x8c/0x3e8
  [c13fdeb0] [c1021384] hugepages_setup+0x240/0x2cc
  [c13fdef0] [c1000574] unknown_bootoption+0xfc/0x280
  [c13fdf30] [c0078904] parse_args+0x200/0x4c4
  [c13fdfa0] [c1000d9c] start_kernel+0x238/0x7d0
  [c13fdff0] [c0000434] set_ivor+0x12c/0x168
  Code: 554aa33e 7c042840 3ce0c142 80a7427c 5109a016 50caa016 7c9a2378 7fdcf378 4180000c 7c052040 41810160 7c095040 <0fe00000> 38c00000 40800108 3c60c0eb
  ---[ end trace 0000000000000000 ]---

This is due to virt_addr_valid() using high_memory before it is set.

high_memory is set in mem_init() using max_low_pfn, but max_low_pfn
is available long before, it is set in mem_topology_setup(). So just
like commit daa9ada209 ("powerpc/mm: Fix boot crash with FLATMEM")
moved the setting of max_mapnr immediately after the call to
mem_topology_setup(), the same can be done for high_memory.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/62b69c4baad067093f39e7e60df0fe27a86b8d2a.1723100702.git.christophe.leroy@csgroup.eu
2024-08-12 21:50:20 +10:00
..
book3s32 powerpc: use CONFIG_EXECMEM instead of CONFIG_MODULES where appropriate 2024-05-14 00:31:44 -07:00
book3s64 - 875fa64577 ("mm/hugetlb_vmemmap: fix race with speculative PFN 2024-07-21 17:15:46 -07:00
kasan powerpc/8xx: rework support for 8M pages using contiguous PTE entries 2024-07-12 15:52:17 -07:00
nohash - 875fa64577 ("mm/hugetlb_vmemmap: fix race with speculative PFN 2024-07-21 17:15:46 -07:00
ptdump powerpc: Replace CONFIG_4xx with CONFIG_44x 2024-06-28 22:28:48 +10:00
cacheflush.c powerpc: Fix typos 2024-05-08 00:21:30 +10:00
copro_fault.c powerpc/mm: convert coprocessor fault to lock_mm_and_find_vma() 2023-06-24 14:12:58 -07:00
dma-noncoherent.c dma-mapping: merge <linux/dma-noncoherent.h> into <linux/dma-map-ops.h> 2020-10-06 07:07:06 +02:00
drmem.c powerpc/mm/drmem: Silence drmem_init() early return 2024-06-04 17:13:56 +10:00
fault.c powerpc: Replace CONFIG_4xx with CONFIG_44x 2024-06-28 22:28:48 +10:00
hugetlbpage.c powerpc/mm: remove hugepd leftovers 2024-07-12 15:52:19 -07:00
init_32.c powerpc: Untangle fixmap.h and pgtable.h and mmu.h 2023-10-19 17:12:44 +11:00
init_64.c powerpc updates for 6.6 2023-08-31 12:43:10 -07:00
init-common.c powerpc/mm: Fix size of allocated PGDIR 2024-08-12 21:49:53 +10:00
ioremap_32.c powerpc: mm: convert to GENERIC_IOREMAP 2023-08-18 10:12:35 -07:00
ioremap_64.c powerpc: mm: convert to GENERIC_IOREMAP 2023-08-18 10:12:35 -07:00
ioremap.c powerpc/nohash: Replace pte_user() by pte_read() 2023-10-19 17:12:46 +11:00
maccess.c powerpc/inst: Optimise copy_inst_from_kernel_nofault() 2021-12-09 22:41:21 +11:00
Makefile powerpc/Makefile: Remove bits related to the previous use of -mcmodel=large 2024-05-07 23:48:45 +10:00
mem.c powerpc/mm: Fix boot warning with hugepages and CONFIG_DEBUG_VIRTUAL 2024-08-12 21:50:20 +10:00
mmu_context.c powerpc/4xx: Remove CONFIG_BOOKE_OR_40x 2024-06-28 22:28:48 +10:00
mmu_decl.h powerpc: Remove core support for 40x 2024-06-28 22:28:47 +10:00
numa.c powerpc/numa: Online a node if PHB is attached. 2024-06-04 17:13:55 +10:00
pageattr.c powerpc: Don't ignore errors from set_memory_{n}p() in __kernel_map_pages() 2024-03-03 22:18:45 +11:00
pgtable_32.c powerpc/8xx: rework support for 8M pages using contiguous PTE entries 2024-07-12 15:52:17 -07:00
pgtable_64.c mm/treewide: replace pXd_huge() with pXd_leaf() 2024-04-25 20:55:46 -07:00
pgtable-frag.c powerpc: convert various functions to use ptdescs 2023-08-21 13:37:54 -07:00
pgtable.c powerpc/mm: remove hugepd leftovers 2024-07-12 15:52:19 -07:00