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add some SUSE / openSUSE specific checks

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/proc/cpuinfo gets "spec_ctrl" if the ability is there
This commit is contained in:
Marcus Meissner 2018-01-12 13:48:19 +01:00
parent 8bd093173d
commit e490bb5191
1 changed files with 20 additions and 3 deletions
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23
spectre-meltdown-checker.sh
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@ -648,6 +648,13 @@ check_variant2()
else
_info "* Mitigation 1"
_info_nol "* Hardware (CPU microcode) support for mitigation: "
# 0 - no, 1 - yes, 2 - cannot find out via msr
cpu_spec_ctrl=0
if grep -qwi spec_ctrl /proc/cpuinfo; then
cpu_spec_ctrl=1
fi
if [ ! -e /dev/cpu/0/msr ]; then
# try to load the module ourselves (and remember it so we can rmmod it afterwards)
modprobe msr 2>/dev/null && insmod_msr=1
@ -655,17 +662,21 @@ check_variant2()
fi
if [ ! -e /dev/cpu/0/msr ]; then
pstatus yellow UNKNOWN "couldn't read /dev/cpu/0/msr, is msr support enabled in your kernel?"
cpu_spec_ctrl=2
else
# the new MSR 'SPEC_CTRL' is at offset 0x48
# here we use dd, it's the same as using 'rdmsr 0x48' but without needing the rdmsr tool
# if we get a read error, the MSR is not there
dd if=/dev/cpu/0/msr of=/dev/null bs=8 count=1 skip=9 2>/dev/null
if [ $? -eq 0 ]; then
pstatus green YES
else
pstatus red NO
cpu_spec_ctrl=1
fi
fi
if [ $cpu_spec_ctrl -eq 1 ]; then
pstatus green YES
elif [ $cpu_spec_ctrl -eq 0 ]; then
pstatus red NO
fi
if [ "$insmod_msr" = 1 ]; then
# if we used modprobe ourselves, rmmod the module
@ -695,6 +706,12 @@ check_variant2()
fi
done
fi
if [ "$ibrs_supported" != 1 ]; then
if grep -qwi spec_ctrl /proc/cpuinfo; then
pstatus green YES
ibrs_supported=1
fi
fi
if [ "$ibrs_supported" != 1 -a -n "$opt_map" ]; then
if grep -q spec_ctrl "$opt_map"; then
pstatus green YES