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remove dependency on rdmsr

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Stéphane Lesimple 2018-01-07 18:36:56 +01:00
parent 13f2133a97
commit bffda8b3e7
1 changed files with 6 additions and 16 deletions
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22
spectre-meltdown-checker.sh
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@ -1,7 +1,7 @@
#! /bin/sh #! /bin/sh
# Spectre & Meltdown checker # Spectre & Meltdown checker
# Stephane Lesimple # Stephane Lesimple
VERSION=0.05 VERSION=0.06
pstatus() pstatus()
{ {
@ -116,22 +116,12 @@ fi
if [ ! -e /dev/cpu/0/msr ]; then if [ ! -e /dev/cpu/0/msr ]; then
pstatus yellow UNKNOWN "couldn't read /dev/cpu/0/msr, is msr support enabled in your kernel?" pstatus yellow UNKNOWN "couldn't read /dev/cpu/0/msr, is msr support enabled in your kernel?"
else else
if which rdmsr >/dev/null 2>&1; then # same that rdmsr 0x48 but without needing the rdmsr tool
rdmsr 0x48 >/dev/null 2>&1 dd if=/dev/cpu/0/msr of=/dev/null bs=8 count=1 skip=9 2>/dev/null
if [ $? -eq 0 ]; then if [ $? -eq 0 ]; then
pstatus green YES pstatus green YES
else
pstatus red NO
fi
else else
pstatus yellow UNKNOWN "missing 'rdmsr' tool, please install it, usually it's in the msr-tools package" pstatus red NO
# doesn't work:
#dd if=/dev/cpu/0/msr of=/dev/null bs=1 count=8 skip=72 2>/dev/null
#if [ $? -eq 0 ]; then
# pstatus green YES
#else
# pstatus red NO
#fi
fi fi
fi fi