diff options
| author |   Josh Poimboeuf <jpoimboe@kernel.org> | 2022-06-14 23:16:05 +0200 |
|---|---|---|
| committer |   Borislav Petkov <bp@suse.de> | 2022-06-27 10:34:00 +0200 |
| commit | b2620facef4889fefcbf2e87284f34dcd4189bce (patch) | |
| tree | 52439ac589efbe3e3c881eba84cddb489e205c37 /arch/x86/include/asm | |
| parent | x86/cpu/amd: Add Spectral Chicken (diff) | |
| download | linux-dev-b2620facef4889fefcbf2e87284f34dcd4189bce.tar.xz linux-dev-b2620facef4889fefcbf2e87284f34dcd4189bce.zip | |
x86/speculation: Fix RSB filling with CONFIG_RETPOLINE=n
If a kernel is built with CONFIG_RETPOLINE=n, but the user still wants
to mitigate Spectre v2 using IBRS or eIBRS, the RSB filling will be
silently disabled.
There's nothing retpoline-specific about RSB buffer filling. Remove the
CONFIG_RETPOLINE guards around it.
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Diffstat (limited to 'arch/x86/include/asm')
| -rw-r--r-- | arch/x86/include/asm/nospec-branch.h | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/include/asm/nospec-branch.h b/arch/x86/include/asm/nospec-branch.h index bba42bd78edf..08b03c12e6c2 100644 --- a/arch/x86/include/asm/nospec-branch.h +++ b/arch/x86/include/asm/nospec-branch.h @@ -122,11 +122,9 @@ * monstrosity above, manually. */ .macro FILL_RETURN_BUFFER reg:req nr:req ftr:req -#ifdef CONFIG_RETPOLINE ALTERNATIVE "jmp .Lskip_rsb_\@", "", \ftr __FILL_RETURN_BUFFER(\reg,\nr,%_ASM_SP) .Lskip_rsb_\@: -#endif .endm /* |