diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index ec740d5263d8..c29b024b907c 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -2505,27 +2505,16 @@ config MITIGATION_RFDS stored in floating point, vector and integer registers. See also -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 -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 diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c index 119ae8db0199..b30b32b288dd 100644 --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -1605,7 +1605,7 @@ enum bhi_mitigations { }; static enum bhi_mitigations bhi_mitigation __ro_after_init = - IS_ENABLED(CONFIG_SPECTRE_BHI_ON) ? BHI_MITIGATION_ON : BHI_MITIGATION_OFF; + IS_ENABLED(CONFIG_MITIGATION_SPECTRE_BHI) ? BHI_MITIGATION_ON : BHI_MITIGATION_OFF; static int __init spectre_bhi_parse_cmdline(char *str) {