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| author | Josh Poimboeuf <jpoimboe@kernel.org> | 2024-04-10 22:40:51 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2024-04-12 12:05:54 +0200 |
| commit | 4f511739c54b549061993b53fc0380f48dfca23b (patch) | |
| tree | 9b5cf022d9ba1d3745ab5f72c5f0992521a8c653 /arch | |
| parent | 36d4fe147c870f6d3f6602befd7ef44393a1c87a (diff) | |
| download | lwn-4f511739c54b549061993b53fc0380f48dfca23b.tar.gz lwn-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')
| -rw-r--r-- | arch/x86/Kconfig | 17 | ||||
| -rw-r--r-- | arch/x86/kernel/cpu/bugs.c | 2 |
2 files changed, 4 insertions, 15 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 diff --git a/arch/x86/kernel/cpu/bugs.c b/arch/x86/kernel/cpu/bugs.c index 6af4780a18ed..ca295b0c1eee 100644 --- a/arch/x86/kernel/cpu/bugs.c +++ b/arch/x86/kernel/cpu/bugs.c @@ -1628,7 +1628,7 @@ 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) { |