To prevent exploits for Spectre based on LAM as demonstrated by the whitepaper [1], make LAM depend on LASS, which avoids this type of vulnerability. [1] https://download.vusec.net/papers/slam_sp24.pdf Signed-off-by: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx> --- arch/x86/kernel/cpu/cpuid-deps.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kernel/cpu/cpuid-deps.c b/arch/x86/kernel/cpu/cpuid-deps.c index 22612e01ec2e..8986e990beb0 100644 --- a/arch/x86/kernel/cpu/cpuid-deps.c +++ b/arch/x86/kernel/cpu/cpuid-deps.c @@ -85,6 +85,7 @@ static const struct cpuid_dep cpuid_deps[] = { { X86_FEATURE_FRED, X86_FEATURE_LKGS }, { X86_FEATURE_FRED, X86_FEATURE_WRMSRNS }, { X86_FEATURE_LASS, X86_FEATURE_SMAP }, + { X86_FEATURE_LAM, X86_FEATURE_LASS }, {} }; -- 2.43.0
