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arch: make execmem setup available regardless of CONFIG_MODULES

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execmem does not depend on modules, on the contrary modules use
execmem.

To make execmem available when CONFIG_MODULES=n, for instance for
kprobes, split execmem_params initialization out from
arch/*/kernel/module.c and compile it when CONFIG_EXECMEM=y

Signed-off-by: Mike Rapoport (IBM) <rppt@kernel.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
This commit is contained in:
Mike Rapoport (IBM)
2024-05-05 19:06:24 +03:00
committed by Luis Chamberlain
parent 1b750c2fbf
commit 0cc2dc4902
23 changed files with 453 additions and 435 deletions
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30
arch/s390/mm/init.c
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@@ -49,6 +49,7 @@
#include <asm/uv.h>
#include <linux/virtio_anchor.h>
#include <linux/virtio_config.h>
#include <linux/execmem.h>
pgd_t swapper_pg_dir[PTRS_PER_PGD] __section(".bss..swapper_pg_dir");
pgd_t invalid_pg_dir[PTRS_PER_PGD] __section(".bss..invalid_pg_dir");
@@ -302,3 +303,32 @@ void arch_remove_memory(u64 start, u64 size, struct vmem_altmap *altmap)
vmem_remove_mapping(start, size);
}
#endif /* CONFIG_MEMORY_HOTPLUG */
#ifdef CONFIG_EXECMEM
static struct execmem_info execmem_info __ro_after_init;
struct execmem_info __init *execmem_arch_setup(void)
{
unsigned long module_load_offset = 0;
unsigned long start;
if (kaslr_enabled())
module_load_offset = get_random_u32_inclusive(1, 1024) * PAGE_SIZE;
start = MODULES_VADDR + module_load_offset;
execmem_info = (struct execmem_info){
.ranges = {
[EXECMEM_DEFAULT] = {
.flags = EXECMEM_KASAN_SHADOW,
.start = start,
.end = MODULES_END,
.pgprot = PAGE_KERNEL,
.alignment = MODULE_ALIGN,
},
},
};
return &execmem_info;
}
#endif /* CONFIG_EXECMEM */