android/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Revert "x86/alternative: Make custom return thunk unconditional"

Browse Source 
This reverts commit 08f7cfd44f77b2796582bc26164fdef44dd33b6c.

Revert the backport of upstream commit:

  095b8303f383 ("x86/alternative: Make custom return thunk unconditional")

in order to backport the full version now that

  770ae1b70952 ("x86/returnthunk: Allow different return thunks")

has been backported.

Revert it here so that the build breakage is kept at minimum.

Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Borislav Petkov (AMD) 2024-02-22 15:50:48 +01:00 committed by Greg Kroah-Hartman
parent e8e9d1f6cf
commit dd1a169b44
2 changed files with 0 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/include/asm/nospec-branch.h
View File

@ -190,11 +190,7 @@
_ASM_PTR " 999b\n\t" \
".popsection\n\t"
#ifdef CONFIG_RETHUNK
extern void __x86_return_thunk(void);
#else
static inline void __x86_return_thunk(void) {}
#endif
extern void retbleed_return_thunk(void);
extern void srso_return_thunk(void);

4
arch/x86/kernel/cpu/bugs.c
View File

@ -61,10 +61,6 @@ EXPORT_SYMBOL_GPL(x86_pred_cmd);
static DEFINE_MUTEX(spec_ctrl_mutex);
#ifdef CONFIG_CALL_THUNKS
void (*x86_return_thunk)(void) __ro_after_init = &__x86_return_thunk;
#endif
/* Update SPEC_CTRL MSR and its cached copy unconditionally */
static void update_spec_ctrl(u64 val)
{