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authorScott Wood <scottwood@freescale.com>2014-05-05 19:41:10 -0500
committerScott Wood <scottwood@freescale.com>2014-05-22 18:08:12 -0500
commite57eeae4e6453be952d066519466858b5f64d19c (patch)
treed2ece9f6aadee671fa45c6c2b736ca0aca42afa0 /arch/powerpc/mm
parenta614db9ae9377f102d3fc35ca52efd93454f7a77 (diff)
downloadop-kernel-dev-e57eeae4e6453be952d066519466858b5f64d19c.zip
op-kernel-dev-e57eeae4e6453be952d066519466858b5f64d19c.tar.gz
powerpc/fsl-booke64: Set vmemmap_psize to 4K
The only way Freescale booke chips support mappings larger than 4K is via TLB1. The only way we support (direct) TLB1 entries is via hugetlb, which is not what map_kernel_page() does when given a large page size. Without this, a kernel with CONFIG_SPARSEMEM_VMEMMAP enabled crashes on boot with messages such as: PID hash table entries: 4096 (order: 3, 32768 bytes) Sorting __ex_table... BUG: Bad page state in process swapper pfn:00a2f page:8000040000023a48 count:0 mapcount:0 mapping:0000040000ffce48 index:0x40000ffbe50 page flags: 0x40000ffda40(active|arch_1|private|private_2|head|tail|swapcache|mappedtodisk|reclaim|swapbacked|unevictable|mlocked) page dumped because: PAGE_FLAGS_CHECK_AT_FREE flag(s) set bad because of flags: page flags: 0x311840(active|private|private_2|swapcache|unevictable|mlocked) Modules linked in: CPU: 0 PID: 0 Comm: swapper Not tainted 3.15.0-rc1-00003-g7fa250c #299 Call Trace: [c00000000098ba20] [c000000000008b3c] .show_stack+0x7c/0x1cc (unreliable) [c00000000098baf0] [c00000000060aa50] .dump_stack+0x88/0xb4 [c00000000098bb70] [c0000000000c0468] .bad_page+0x144/0x1a0 [c00000000098bc10] [c0000000000c0628] .free_pages_prepare+0x164/0x17c [c00000000098bcc0] [c0000000000c24cc] .free_hot_cold_page+0x48/0x214 [c00000000098bd60] [c00000000086c318] .free_all_bootmem+0x1fc/0x354 [c00000000098be70] [c00000000085da84] .mem_init+0xac/0xdc [c00000000098bef0] [c0000000008547b0] .start_kernel+0x21c/0x4d4 [c00000000098bf90] [c000000000000448] .start_here_common+0x20/0x58 Signed-off-by: Scott Wood <scottwood@freescale.com>
Diffstat (limited to 'arch/powerpc/mm')
-rw-r--r--arch/powerpc/mm/tlb_nohash.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/powerpc/mm/tlb_nohash.c b/arch/powerpc/mm/tlb_nohash.c
index ae3d5b7..92cb18d 100644
--- a/arch/powerpc/mm/tlb_nohash.c
+++ b/arch/powerpc/mm/tlb_nohash.c
@@ -596,8 +596,13 @@ static void __early_init_mmu(int boot_cpu)
/* XXX This should be decided at runtime based on supported
* page sizes in the TLB, but for now let's assume 16M is
* always there and a good fit (which it probably is)
+ *
+ * Freescale booke only supports 4K pages in TLB0, so use that.
*/
- mmu_vmemmap_psize = MMU_PAGE_16M;
+ if (mmu_has_feature(MMU_FTR_TYPE_FSL_E))
+ mmu_vmemmap_psize = MMU_PAGE_4K;
+ else
+ mmu_vmemmap_psize = MMU_PAGE_16M;
/* XXX This code only checks for TLB 0 capabilities and doesn't
* check what page size combos are supported by the HW. It
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