Commit c0d8832e authored by Suzuki K Poulose's avatar Suzuki K Poulose Committed by Catalin Marinas

arm64: Ensure the instruction emulation is ready for userspace

We trap and emulate some instructions (e.g, mrs, deprecated instructions)
for the userspace. However the handlers for these are registered as
late_initcalls and the userspace could be up and running from the initramfs
by that time (with populate_rootfs, which is a rootfs_initcall()). This
could cause problems for the early applications ending up in failure
like :

[   11.152061] modprobe[93]: undefined instruction: pc=0000ffff8ca48ff4

This patch promotes the specific calls to core_initcalls, which are
guaranteed to be completed before we hit userspace.

Cc: stable@vger.kernel.org
Cc: Dave Martin <dave.martin@arm.com>
Cc: Matthias Brugger <mbrugger@suse.com>
Cc: James Morse <james.morse@arm.com>
Reported-by: default avatarMatwey V. Kornilov <matwey.kornilov@gmail.com>
Signed-off-by: default avatarSuzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent b02faed1
...@@ -649,4 +649,4 @@ static int __init armv8_deprecated_init(void) ...@@ -649,4 +649,4 @@ static int __init armv8_deprecated_init(void)
return 0; return 0;
} }
late_initcall(armv8_deprecated_init); core_initcall(armv8_deprecated_init);
...@@ -1307,4 +1307,4 @@ static int __init enable_mrs_emulation(void) ...@@ -1307,4 +1307,4 @@ static int __init enable_mrs_emulation(void)
return 0; return 0;
} }
late_initcall(enable_mrs_emulation); core_initcall(enable_mrs_emulation);
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