summaryrefslogtreecommitdiffstats
path: root/arch/x86/Kconfig
diff options
context:
space:
mode:
authorJosh Poimboeuf <jpoimboe@kernel.org>2024-04-11 07:40:51 +0200
committerIngo Molnar <mingo@kernel.org>2024-04-12 12:05:54 +0200
commit4f511739c54b549061993b53fc0380f48dfca23b (patch)
tree9b5cf022d9ba1d3745ab5f72c5f0992521a8c653 /arch/x86/Kconfig
parentx86/bugs: Remove CONFIG_BHI_MITIGATION_AUTO and spectre_bhi=auto (diff)
downloadlinux-4f511739c54b549061993b53fc0380f48dfca23b.tar.xz
linux-4f511739c54b549061993b53fc0380f48dfca23b.zip
x86/bugs: Replace CONFIG_SPECTRE_BHI_{ON,OFF} with CONFIG_MITIGATION_SPECTRE_BHI
For consistency with the other CONFIG_MITIGATION_* options, replace the CONFIG_SPECTRE_BHI_{ON,OFF} options with a single CONFIG_MITIGATION_SPECTRE_BHI option. [ mingo: Fix ] Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: Ingo Molnar <mingo@kernel.org> Cc: Sean Christopherson <seanjc@google.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Nikolay Borisov <nik.borisov@suse.com> Link: https://lore.kernel.org/r/3833812ea63e7fdbe36bf8b932e63f70d18e2a2a.1712813475.git.jpoimboe@kernel.org
Diffstat (limited to 'arch/x86/Kconfig')
-rw-r--r--arch/x86/Kconfig17
1 files changed, 3 insertions, 14 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index b63b6767a63d..4474bf32d0a4 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -2633,27 +2633,16 @@ config MITIGATION_RFDS
stored in floating point, vector and integer registers.
See also <file:Documentation/admin-guide/hw-vuln/reg-file-data-sampling.rst>
-choice
- prompt "Clear branch history"
+config MITIGATION_SPECTRE_BHI
+ bool "Mitigate Spectre-BHB (Branch History Injection)"
depends on CPU_SUP_INTEL
- default SPECTRE_BHI_ON
+ default y
help
Enable BHI mitigations. BHI attacks are a form of Spectre V2 attacks
where the branch history buffer is poisoned to speculatively steer
indirect branches.
See <file:Documentation/admin-guide/hw-vuln/spectre.rst>
-config SPECTRE_BHI_ON
- bool "on"
- help
- Equivalent to setting spectre_bhi=on command line parameter.
-config SPECTRE_BHI_OFF
- bool "off"
- help
- Equivalent to setting spectre_bhi=off command line parameter.
-
-endchoice
-
endif
config ARCH_HAS_ADD_PAGES