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powerpc/mm/radix: Display if mappings are exec or not

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At boot we print the ranges we've mapped for the linear mapping and
what page size we've used. Also track whether the range is mapped
executable or not and display that as well.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Ellerman 2018-10-17 23:53:38 +11:00
parent 232aa40763
commit afb6d0647f
1 changed files with 17 additions and 12 deletions
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29
arch/powerpc/mm/pgtable-radix.c
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@ -241,9 +241,8 @@ void radix__mark_initmem_nx(void)
}
#endif /* CONFIG_STRICT_KERNEL_RWX */
static inline void __meminit print_mapping(unsigned long start,
unsigned long end,
unsigned long size)
static inline void __meminit
print_mapping(unsigned long start, unsigned long end, unsigned long size, bool exec)
{
char buf[10];
@ -252,7 +251,8 @@ static inline void __meminit print_mapping(unsigned long start,
string_get_size(size, 1, STRING_UNITS_2, buf, sizeof(buf));
pr_info("Mapped 0x%016lx-0x%016lx with %s pages\n", start, end, buf);
pr_info("Mapped 0x%016lx-0x%016lx with %s pages%s\n", start, end, buf,
exec ? " (exec)" : "");
}
static unsigned long next_boundary(unsigned long addr, unsigned long end)
@ -269,6 +269,7 @@ static int __meminit create_physical_mapping(unsigned long start,
int nid)
{
unsigned long vaddr, addr, mapping_size = 0;
bool prev_exec, exec = false;
pgprot_t prot;
int psize;
@ -279,6 +280,7 @@ static int __meminit create_physical_mapping(unsigned long start,
gap = next_boundary(addr, end) - addr;
previous_size = mapping_size;
prev_exec = exec;
if (IS_ALIGNED(addr, PUD_SIZE) && gap >= PUD_SIZE &&
mmu_psize_defs[MMU_PAGE_1G].shift) {
@ -293,18 +295,21 @@ static int __meminit create_physical_mapping(unsigned long start,
psize = mmu_virtual_psize;
}
if (mapping_size != previous_size) {
print_mapping(start, addr, previous_size);
start = addr;
}
vaddr = (unsigned long)__va(addr);
if (overlaps_kernel_text(vaddr, vaddr + mapping_size) ||
overlaps_interrupt_vector_text(vaddr, vaddr + mapping_size))
overlaps_interrupt_vector_text(vaddr, vaddr + mapping_size)) {
prot = PAGE_KERNEL_X;
else
exec = true;
} else {
prot = PAGE_KERNEL;
exec = false;
}
if (mapping_size != previous_size || exec != prev_exec) {
print_mapping(start, addr, previous_size, prev_exec);
start = addr;
}
rc = __map_kernel_page(vaddr, addr, prot, mapping_size, nid, start, end);
if (rc)
@ -313,7 +318,7 @@ static int __meminit create_physical_mapping(unsigned long start,
update_page_count(psize, 1);
}
print_mapping(start, addr, mapping_size);
print_mapping(start, addr, mapping_size, exec);
return 0;
}