Hi all,
Today's linux-next merge of the tip tree got a conflict in
arch/arm64/mm/mmu.c between commit a501e32430d4 ("arm64: Clean up the
default pgprot setting") and 206a2a73a62d ("arm64: mm: Create gigabyte
kernel logical mappings where possible") from the arm64 tree and commit
d7ecbddf4cae ("arm64: Add function to create identity mappings") from
the tip tree.
I fixed it up (maybe - see below - this may not be complete) and can
carry the fix as necessary (no action is required).
--
Cheers,
Stephen Rothwell s...@canb.auug.org.au
diff --cc arch/arm64/mm/mmu.c
index 3a729de96f15,4a829a210bb6..000000000000
--- a/arch/arm64/mm/mmu.c
+++ b/arch/arm64/mm/mmu.c
@@@ -158,6 -192,17 +160,17 @@@ static void __init alloc_init_pmd(pud_
{
pmd_t *pmd;
unsigned long next;
+ pmdval_t prot_sect;
+ pgprot_t prot_pte;
+
+ if (map_io) {
+ prot_sect = PMD_TYPE_SECT | PMD_SECT_AF |
+ PMD_ATTRINDX(MT_DEVICE_nGnRE);
+ prot_pte = __pgprot(PROT_DEVICE_nGnRE);
+ } else {
- prot_sect = prot_sect_kernel;
++ prot_sect = PROT_SECT_NORMAL_EXEC;
+ prot_pte = PAGE_KERNEL_EXEC;
+ }
/*
* Check for initial section mappings in the pgd/pud and remove them.
@@@ -195,30 -242,7 +210,30 @@@ static void __init alloc_init_pud(pgd_
do {
next = pud_addr_end(addr, end);
- alloc_init_pmd(pud, addr, next, phys, map_io);
+
+ /*
+ * For 4K granule only, attempt to put down a 1GB block
+ */
+ if ((PAGE_SHIFT == 12) &&
+ ((addr | next | phys) & ~PUD_MASK) == 0) {
+ pud_t old_pud = *pud;
+ set_pud(pud, __pud(phys | PROT_SECT_NORMAL_EXEC));
+
+ /*
+ * If we have an old value for a pud, it will
+ * be pointing to a pmd table that we no longer
+ * need (from swapper_pg_dir).
+ *
+ * Look up the old pmd table and free it.
+ */
+ if (!pud_none(old_pud)) {
+ phys_addr_t table = __pa(pmd_offset(&old_pud,
0));
+ memblock_free(table, PAGE_SIZE);
+ flush_tlb_all();
+ }
+ } else {
- alloc_init_pmd(pud, addr, next, phys);
++ alloc_init_pmd(pud, addr, next, phys, map_io);
+ }
phys += next - addr;
} while (pud++, addr = next, addr != end);
}
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