arm64/kernel: Move 'nokaslr' parsing out of early idreg code

Parsing and ignoring 'nokaslr' can be done from anywhere, except from
the code that runs very early and is therefore built with limitations on
the kind of relocations it is permitted to use.

So move it to a source file that is part of the ordinary kernel build.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20231129111555.3594833-63-ardb@google.com
Signed-off-by: Will Deacon <will@kernel.org>

diff --git a/arch/arm64/kernel/idreg-override.c b/arch/arm64/kernel/idreg-override.c
index 9646f94..e30fd9e 100644 (file)
--- a/arch/arm64/kernel/idreg-override.c
+++ b/arch/arm64/kernel/idreg-override.c
@@ -199,13 +199,6 @@ static const struct {
        { "nokaslr",                    "arm64_sw.nokaslr=1" },
 };
 
-static int __init parse_nokaslr(char *unused)
-{
-       /* nokaslr param handling is done by early cpufeature code */
-       return 0;
-}
-early_param("nokaslr", parse_nokaslr);
-
 static int __init parse_hexdigit(const char *p, u64 *v)
 {
        // skip "0x" if it comes next

diff --git a/arch/arm64/kernel/kaslr.c b/arch/arm64/kernel/kaslr.c
index 94a269c..12c7f3c 100644 (file)
--- a/arch/arm64/kernel/kaslr.c
+++ b/arch/arm64/kernel/kaslr.c
@@ -36,3 +36,10 @@ void __init kaslr_init(void)
        pr_info("KASLR enabled\n");
        __kaslr_is_enabled = true;
 }
+
+static int __init parse_nokaslr(char *unused)
+{
+       /* nokaslr param handling is done by early cpufeature code */
+       return 0;
+}
+early_param("nokaslr", parse_nokaslr);