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fix: variant3a: Silvermont CPUs are not vulnerable to variant 3a

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This commit is contained in:
Stéphane Lesimple 2019-11-24 20:19:21 +01:00
parent 0cd7e1164f
commit bfed3187a6
1 changed files with 10 additions and 1 deletions
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11
spectre-meltdown-checker.sh
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@ -393,11 +393,20 @@ is_cpu_vulnerable()
[ -z "$variant4" ] && variant4=immune
_debug "is_cpu_vulnerable: cpu not affected by speculative store bypass so not vuln to variant4"
fi
# variant 4a for xeon phi
# variant 3a
if [ "$cpu_family" = 6 ]; then
if [ "$cpu_model" = "$INTEL_FAM6_XEON_PHI_KNL" ] || [ "$cpu_model" = "$INTEL_FAM6_XEON_PHI_KNM" ]; then
_debug "is_cpu_vulnerable: xeon phi immune to variant 3a"
[ -z "$variant3a" ] && variant3a=immune
elif [ "$cpu_model" = "$INTEL_FAM6_ATOM_SILVERMONT" ] || \
[ "$cpu_model" = "$INTEL_FAM6_ATOM_SILVERMONT_MID" ] || \
[ "$cpu_model" = "$INTEL_FAM6_ATOM_SILVERMONT_X" ]; then
# https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00115.html
# https://github.com/speed47/spectre-meltdown-checker/issues/310
# => silvermont CPUs (aka cherry lake for tablets and brawsell for mobile/desktop) don't seem to be vulnerable
# => goldmont ARE vulnerable
_debug "is_cpu_vulnerable: silvermont immune to variant 3a"
[ -z "$variant3a" ] && variant3a=immune
fi
fi
# L1TF (RDCL_NO already checked above)