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Merge branch 'riscv-wx-mappings' into for-next

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This contains both the short-term fix for the W+X boot mappings and the
larger cleanup.

* riscv-wx-mappings:
  riscv: Map the kernel with correct permissions the first time
  riscv: Introduce set_kernel_memory helper
  riscv: Simplify xip and !xip kernel address conversion macros
  riscv: Remove CONFIG_PHYS_RAM_BASE_FIXED
  riscv: mm: Fix W+X mappings at boot
This commit is contained in:
Palmer Dabbelt
2021-06-30 21:50:32 -07:00
parent 47513f243b e5c35fa040
commit 01112e5e20
7 changed files with 102 additions and 94 deletions
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12
arch/riscv/kernel/setup.c
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@@ -289,11 +289,6 @@ void __init setup_arch(char **cmdline_p)
init_resources();
sbi_init();
if (IS_ENABLED(CONFIG_STRICT_KERNEL_RWX)) {
protect_kernel_text_data();
protect_kernel_linear_mapping_text_rodata();
}
#ifdef CONFIG_KASAN
kasan_init();
#endif
@@ -328,11 +323,10 @@ subsys_initcall(topology_init);
void free_initmem(void)
{
unsigned long init_begin = (unsigned long)__init_begin;
unsigned long init_end = (unsigned long)__init_end;
if (IS_ENABLED(CONFIG_STRICT_KERNEL_RWX))
set_memory_rw_nx(init_begin, (init_end - init_begin) >> PAGE_SHIFT);
set_kernel_memory(lm_alias(__init_begin), lm_alias(__init_end),
IS_ENABLED(CONFIG_64BIT) ?
set_memory_rw : set_memory_rw_nx);
free_initmem_default(POISON_FREE_INITMEM);
}