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| author |   Nikolay Borisov <nik.borisov@suse.com> | 2023-06-23 14:14:06 +0300 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2023-09-14 13:19:53 +0200 |
| commit | 370dcd58548a360bbf8a65b89b410d09f56bf0c6 (patch) | |
| tree | a1b348f6f063dd2204506760809c8ff9beb91b49 | |
| parent | x86/entry: Rename ignore_sysret() (diff) | |
| download | wireguard-linux-370dcd58548a360bbf8a65b89b410d09f56bf0c6.tar.xz wireguard-linux-370dcd58548a360bbf8a65b89b410d09f56bf0c6.zip | |
x86/entry: Compile entry_SYSCALL32_ignore() unconditionally
To limit the IA32 exposure on 64bit kernels while keeping the
flexibility for the user to enable it when required, the compile time
enable/disable via CONFIG_IA32_EMULATION is not good enough and will
be complemented with a kernel command line option.
Right now entry_SYSCALL32_ignore() is only compiled when
CONFIG_IA32_EMULATION=n, but boot-time enable- / disablement obviously
requires it to be unconditionally available.
Remove the #ifndef CONFIG_IA32_EMULATION guard.
Signed-off-by: Nikolay Borisov <nik.borisov@suse.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20230623111409.3047467-4-nik.borisov@suse.com
| -rw-r--r-- | arch/x86/entry/entry_64.S | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index 3be71accb7a0..f71664dea1a3 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -1511,7 +1511,6 @@ nmi_restore: iretq SYM_CODE_END(asm_exc_nmi) -#ifndef CONFIG_IA32_EMULATION /* * This handles SYSCALL from 32-bit code. There is no way to program * MSRs to fully disable 32-bit SYSCALL. @@ -1522,7 +1521,6 @@ SYM_CODE_START(entry_SYSCALL32_ignore) mov $-ENOSYS, %eax sysretl SYM_CODE_END(entry_SYSCALL32_ignore) -#endif .pushsection .text, "ax" __FUNC_ALIGN |