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feat: hw check: add IPRED, RRSBA, BHI features check

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Stéphane Lesimple 2022-03-19 18:39:44 +01:00
parent 6d7a6b3666
commit ae6bc31c2c
1 changed files with 45 additions and 0 deletions
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45
spectre-meltdown-checker.sh
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@ -2865,6 +2865,51 @@ check_cpu()
fi
fi
if is_intel; then
_info " * Indirect Branch Predictor Controls"
_info_nol " * Indirect Predictor Disable feature is available: "
read_cpuid 0x7 0x2 $EDX 1 1 1; ret=$?
if [ $ret -eq 0 ]; then
cpuid_ipred=1
pstatus green YES "IPRED_CTRL feature bit"
elif [ $ret -eq 2 ]; then
cpuid_ipred=-1
pstatus yellow UNKNOWN "is cpuid kernel module available?"
else
cpuid_ipred=0
pstatus yellow NO
fi
_info_nol " * Bottomless RSB Disable feature is available: "
read_cpuid 0x7 0x2 $EDX 2 1 1; ret=$?
if [ $ret -eq 0 ]; then
cpuid_rrsba=1
pstatus green YES "RRSBA_CTRL feature bit"
elif [ $ret -eq 2 ]; then
cpuid_rrsba=-1
pstatus yellow UNKNOWN "is cpuid kernel module available?"
else
cpuid_rrsba=0
pstatus yellow NO
fi
_info_nol " * BHB-Focused Indirect Predictor Disable feature is available: "
read_cpuid 0x7 0x2 $EDX 2 1 1; ret=$?
if [ $ret -eq 0 ]; then
cpuid_bhi=1
pstatus green YES "BHI_CTRL feature bit"
elif [ $ret -eq 2 ]; then
cpuid_bhi=-1
pstatus yellow UNKNOWN "is cpuid kernel module available?"
else
cpuid_bhi=0
pstatus yellow NO
fi
# make shellcheck happy while we're not yet using these new cpuid values in our checks
export cpuid_ipred cpuid_rrsba cpuid_bhi
fi
if is_intel; then
_info " * Enhanced IBRS (IBRS_ALL)"
_info_nol " * CPU indicates ARCH_CAPABILITIES MSR availability: "