diff options
| author | Juergen Gross <jgross@suse.com> | 2023-11-29 14:33:29 +0100 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2023-12-10 20:30:31 +0100 |
| commit | 9824b00c2b58f9e1072ef3ece571a2cfc71089d4 (patch) | |
| tree | a4bc9c4efb42ef53c3893735156f491c20feda4d /arch/x86/kernel/alternative.c | |
| parent | x86/paravirt: Introduce ALT_NOT_XEN (diff) | |
| download | linux-9824b00c2b58f9e1072ef3ece571a2cfc71089d4.tar.xz linux-9824b00c2b58f9e1072ef3ece571a2cfc71089d4.zip | |
x86/paravirt: Move some functions and defines to alternative.c
As a preparation for replacing paravirt patching completely by
alternative patching, move some backend functions and #defines to
the alternatives code and header.
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20231129133332.31043-3-jgross@suse.com
Diffstat (limited to 'arch/x86/kernel/alternative.c')
| -rw-r--r-- | arch/x86/kernel/alternative.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index be35c8ccf826..ca25dd280b8c 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -385,6 +385,16 @@ apply_relocation(u8 *buf, size_t len, u8 *dest, u8 *src, size_t src_len) } } +/* Low-level backend functions usable from alternative code replacements. */ +DEFINE_ASM_FUNC(nop_func, "", .entry.text); +EXPORT_SYMBOL_GPL(nop_func); + +noinstr void BUG_func(void) +{ + BUG(); +} +EXPORT_SYMBOL_GPL(BUG_func); + /* * Replace instructions with better alternatives for this CPU type. This runs * before SMP is initialized to avoid SMP problems with self modifying code. |