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spectre-meltdown-checker
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feat: print raw cpuid, and fetch ucode version under BSD

This commit is contained in:
Stéphane Lesimple 2018-04-05 00:07:12 +02:00
parent 7a4ebe8009
commit b88f32ed95
1 changed files with 23 additions and 1 deletions
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24
spectre-meltdown-checker.sh
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@ -868,6 +868,28 @@ parse_cpu_details()
cpu_friendly_name=$(sysctl -n hw.model)
fi
# get raw cpuid, it's always useful (referenced in the Intel doc for firmware updates for example)
if read_cpuid 0x1 1 0 0xFFFFFFFF; then
cpuid="$read_cpuid_value"
fi
# under BSD, linprocfs often doesn't export ucode information, so fetch it ourselves the good old way
if [ -z "$cpu_ucode" ] && [ "$os" != Linux ]; then
load_cpuid
if [ -e /dev/cpuctl0 ]; then
# init MSR with NULLs
cpucontrol -m 0x8b=0 /dev/cpuctl0
# call CPUID
cpucontrol -i 1 /dev/cpuctl0 >/dev/null
# read MSR
cpu_ucode=$(cpucontrol -m 0x8b /dev/cpuctl0 | awk '{print $3}')
# convert to decimal
cpu_ucode=$(( cpu_ucode ))
# convert back to hex
cpu_ucode=$(printf "0x%x" "$cpu_ucode")
fi
fi
# also define those that we will need in other funcs
# taken from ttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/x86/include/asm/intel-family.h
# shellcheck disable=SC2034
@ -944,7 +966,7 @@ is_ucode_blacklisted()
# source: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/x86/kernel/cpu/intel.c#n105
# 2018-02-08 update: https://newsroom.intel.com/wp-content/uploads/sites/11/2018/02/microcode-update-guidance.pdf
# model,stepping,microcode
ucode_found="model $cpu_model stepping $cpu_stepping ucode $cpu_ucode"
ucode_found="model $cpu_model stepping $cpu_stepping ucode $cpu_ucode cpuid "$(printf "0x%x" "$cpuid")
for tuple in \
$INTEL_FAM6_KABYLAKE_DESKTOP,0x0B,0x80 \
$INTEL_FAM6_KABYLAKE_DESKTOP,0x0A,0x80 \