mirror of
https://github.com/speed47/spectre-meltdown-checker.git
synced 2024-12-05 02:38:04 +01:00
feat: add subleaf != 0 support for read_cpuid
This commit is contained in:
Stéphane Lesimple
parent
16f2160be5
commit
6d7a6b3666
@ -1455,17 +1455,32 @@ read_cpuid()
|
||||
{
|
||||
# leaf is the value of the eax register when calling the cpuid instruction:
|
||||
_leaf="$1"
|
||||
# subleaf is the value of the ecx register when calling the cpuid instruction:
|
||||
_subleaf="$2"
|
||||
# eax=1 ebx=2 ecx=3 edx=4:
|
||||
_register="$2"
|
||||
# number of bits to shift the register right to:
|
||||
_shift="$3"
|
||||
_register="$3"
|
||||
# number of bits to shift the register right to, 0-31:
|
||||
_shift="$4"
|
||||
# mask to apply as an AND operand to the shifted register value
|
||||
_mask="$4"
|
||||
_mask="$5"
|
||||
# wanted value (optional), if present we return 0(true) if the obtained value is equal, 1 otherwise:
|
||||
_wanted="$5"
|
||||
_wanted="$6"
|
||||
# in any case, the read value is globally available in $read_cpuid_value
|
||||
|
||||
read_cpuid_value=''
|
||||
|
||||
if [ $# -lt 5 ]; then
|
||||
echo "read_cpuid: missing arguments, got only $#, expected at least 5: $*"
|
||||
return 2
|
||||
fi
|
||||
if [ "$_register" -gt 4 ]; then
|
||||
echo "read_cpuid: register must be 0-4, got $_register"
|
||||
return 2
|
||||
fi
|
||||
if [ "$_shift" -gt 32 ]; then
|
||||
echo "read_cpuid: shift must be 0-31, got $_shift"
|
||||
return 2
|
||||
fi
|
||||
|
||||
if [ ! -e /dev/cpu/0/cpuid ] && [ ! -e /dev/cpuctl0 ]; then
|
||||
# try to load the module ourselves (and remember it so we can rmmod it afterwards)
|
||||
load_cpuid
|
||||
@ -1480,9 +1495,11 @@ read_cpuid()
|
||||
dd if=/dev/cpu/0/cpuid bs=16 count=1 >/dev/null 2>&1 || load_cpuid
|
||||
# we need _leaf to be converted to decimal for dd
|
||||
_leaf=$(( _leaf ))
|
||||
_subleaf=$(( _subleaf ))
|
||||
_position=$(( _leaf + (_subleaf << 32) ))
|
||||
# to avoid using iflag=skip_bytes, which doesn't exist on old versions of dd, seek to the closer multiple-of-16
|
||||
_ddskip=$(( _leaf / 16 ))
|
||||
_odskip=$(( _leaf - _ddskip * 16 ))
|
||||
_ddskip=$(( _position / 16 ))
|
||||
_odskip=$(( _position - _ddskip * 16 ))
|
||||
# now read the value
|
||||
_cpuid=$(dd if=/dev/cpu/0/cpuid bs=16 skip=$_ddskip count=$((_odskip + 1)) 2>/dev/null | od -j $((_odskip * 16)) -A n -t u4)
|
||||
elif [ -e /dev/cpuctl0 ]; then
|
||||
@ -1490,20 +1507,20 @@ read_cpuid()
|
||||
if [ ! -r /dev/cpuctl0 ]; then
|
||||
return 2
|
||||
fi
|
||||
_cpuid=$(cpucontrol -i "$_leaf" /dev/cpuctl0 2>/dev/null | awk '{print $4,$5,$6,$7}')
|
||||
# cpuid level 0x1: 0x000306d4 0x00100800 0x4dfaebbf 0xbfebfbff
|
||||
_cpuid=$(cpucontrol -i "$_leaf","$_subleaf" /dev/cpuctl0 2>/dev/null | cut -d: -f2-)
|
||||
# cpuid level 0x4, level_type 0x2: 0x1c004143 0x01c0003f 0x000001ff 0x00000000
|
||||
else
|
||||
return 2
|
||||
fi
|
||||
|
||||
_debug "cpuid: leaf$_leaf on cpu0, eax-ebx-ecx-edx: $_cpuid"
|
||||
_mockvarname="SMC_MOCK_CPUID_${_leaf}"
|
||||
_debug "cpuid: leaf$_leaf subleaf$_subleaf on cpu0, eax-ebx-ecx-edx: $_cpuid"
|
||||
_mockvarname="SMC_MOCK_CPUID_${_leaf}_${_subleaf}"
|
||||
if [ -n "$(eval echo \$$_mockvarname)" ]; then
|
||||
_cpuid="$(eval echo \$$_mockvarname)"
|
||||
_debug "read_cpuid: MOCKING enabled for leaf $_leaf, will return $_cpuid"
|
||||
_debug "read_cpuid: MOCKING enabled for leaf $_leaf subleaf $_subleaf, will return $_cpuid"
|
||||
mocked=1
|
||||
else
|
||||
mockme=$(printf "%b\n%b" "$mockme" "SMC_MOCK_CPUID_${_leaf}='$_cpuid'")
|
||||
mockme=$(printf "%b\n%b" "$mockme" "SMC_MOCK_CPUID_${_leaf}_${_subleaf}='$_cpuid'")
|
||||
fi
|
||||
[ -z "$_cpuid" ] && return 2
|
||||
# get the value of the register we want
|
||||
@ -1633,7 +1650,7 @@ parse_cpu_details()
|
||||
fi
|
||||
|
||||
# get raw cpuid, it's always useful (referenced in the Intel doc for firmware updates for example)
|
||||
if read_cpuid 0x1 $EAX 0 0xFFFFFFFF; then
|
||||
if read_cpuid 0x1 0x0 $EAX 0 0xFFFFFFFF; then
|
||||
cpu_cpuid="$read_cpuid_value"
|
||||
else
|
||||
cpu_cpuid=0
|
||||
@ -2413,6 +2430,7 @@ write_msr()
|
||||
# read_msr
|
||||
# param1 (mandatory): MSR, can be in hex or decimal.
|
||||
# param2 (optional): CPU index, starting from 0. Default 0.
|
||||
# returned data is available in $read_msr_value
|
||||
read_msr()
|
||||
{
|
||||
_msr_dec=$(( $1 ))
|
||||
@ -2552,14 +2570,14 @@ check_cpu()
|
||||
# amd: https://developer.amd.com/wp-content/resources/Architecture_Guidelines_Update_Indirect_Branch_Control.pdf
|
||||
# amd: 8000_0008 EBX[14]=1
|
||||
if is_intel; then
|
||||
read_cpuid 0x7 $EDX 26 1 1; ret=$?
|
||||
read_cpuid 0x7 0x0 $EDX 26 1 1; ret=$?
|
||||
if [ $ret -eq 0 ]; then
|
||||
pstatus green YES "SPEC_CTRL feature bit"
|
||||
cpuid_spec_ctrl=1
|
||||
cpuid_ibrs='SPEC_CTRL'
|
||||
fi
|
||||
elif is_amd || is_hygon; then
|
||||
read_cpuid 0x80000008 $EBX 14 1 1; ret=$?
|
||||
read_cpuid 0x80000008 0x0 $EBX 14 1 1; ret=$?
|
||||
if [ $ret -eq 0 ]; then
|
||||
pstatus green YES "IBRS_SUPPORT feature bit"
|
||||
cpuid_ibrs='IBRS_SUPPORT'
|
||||
@ -2578,7 +2596,7 @@ check_cpu()
|
||||
if is_amd || is_hygon; then
|
||||
_info_nol " * CPU indicates preferring IBRS always-on: "
|
||||
# amd or hygon
|
||||
read_cpuid 0x80000008 $EBX 16 1 1; ret=$?
|
||||
read_cpuid 0x80000008 0x0 $EBX 16 1 1; ret=$?
|
||||
if [ $ret -eq 0 ]; then
|
||||
pstatus green YES
|
||||
else
|
||||
@ -2587,7 +2605,7 @@ check_cpu()
|
||||
|
||||
_info_nol " * CPU indicates preferring IBRS over retpoline: "
|
||||
# amd or hygon
|
||||
read_cpuid 0x80000008 $EBX 18 1 1; ret=$?
|
||||
read_cpuid 0x80000008 0x0 $EBX 18 1 1; ret=$?
|
||||
if [ $ret -eq 0 ]; then
|
||||
pstatus green YES
|
||||
else
|
||||
@ -2651,7 +2669,7 @@ check_cpu()
|
||||
pstatus yellow NO
|
||||
fi
|
||||
elif is_amd || is_hygon; then
|
||||
read_cpuid 0x80000008 $EBX 12 1 1; ret=$?
|
||||
read_cpuid 0x80000008 0x0 $EBX 12 1 1; ret=$?
|
||||
if [ $ret -eq 0 ]; then
|
||||
cpuid_ibpb='IBPB_SUPPORT'
|
||||
pstatus green YES "IBPB_SUPPORT feature bit"
|
||||
@ -2677,19 +2695,19 @@ check_cpu()
|
||||
# intel: A processor supports STIBP if it enumerates CPUID (EAX=7H,ECX=0):EDX[27] as 1
|
||||
# amd: 8000_0008 EBX[15]=1
|
||||
if is_intel; then
|
||||
read_cpuid 0x7 $EDX 27 1 1; ret=$?
|
||||
read_cpuid 0x7 0x0 $EDX 27 1 1; ret=$?
|
||||
if [ $ret -eq 0 ]; then
|
||||
pstatus green YES "Intel STIBP feature bit"
|
||||
#cpuid_stibp='Intel STIBP'
|
||||
fi
|
||||
elif is_amd; then
|
||||
read_cpuid 0x80000008 $EBX 15 1 1; ret=$?
|
||||
read_cpuid 0x80000008 0x0 $EBX 15 1 1; ret=$?
|
||||
if [ $ret -eq 0 ]; then
|
||||
pstatus green YES "AMD STIBP feature bit"
|
||||
#cpuid_stibp='AMD STIBP'
|
||||
fi
|
||||
elif is_hygon; then
|
||||
read_cpuid 0x80000008 $EBX 15 1 1; ret=$?
|
||||
read_cpuid 0x80000008 0x0 $EBX 15 1 1; ret=$?
|
||||
if [ $ret -eq 0 ]; then
|
||||
pstatus green YES "HYGON STIBP feature bit"
|
||||
#cpuid_stibp='HYGON STIBP'
|
||||
@ -2707,7 +2725,7 @@ check_cpu()
|
||||
|
||||
if is_amd || is_hygon; then
|
||||
_info_nol " * CPU indicates preferring STIBP always-on: "
|
||||
read_cpuid 0x80000008 $EBX 17 1 1; ret=$?
|
||||
read_cpuid 0x80000008 0x0 $EBX 17 1 1; ret=$?
|
||||
if [ $ret -eq 0 ]; then
|
||||
pstatus green YES
|
||||
else
|
||||
@ -2719,15 +2737,15 @@ check_cpu()
|
||||
if is_intel; then
|
||||
_info " * Speculative Store Bypass Disable (SSBD)"
|
||||
_info_nol " * CPU indicates SSBD capability: "
|
||||
read_cpuid 0x7 $EDX 31 1 1; ret24=$?; ret25=$ret24
|
||||
read_cpuid 0x7 0x0 $EDX 31 1 1; ret24=$?; ret25=$ret24
|
||||
if [ $ret24 -eq 0 ]; then
|
||||
cpuid_ssbd='Intel SSBD'
|
||||
fi
|
||||
elif is_amd; then
|
||||
_info " * Speculative Store Bypass Disable (SSBD)"
|
||||
_info_nol " * CPU indicates SSBD capability: "
|
||||
read_cpuid 0x80000008 $EBX 24 1 1; ret24=$?
|
||||
read_cpuid 0x80000008 $EBX 25 1 1; ret25=$?
|
||||
read_cpuid 0x80000008 0x0 $EBX 24 1 1; ret24=$?
|
||||
read_cpuid 0x80000008 0x0 $EBX 25 1 1; ret25=$?
|
||||
if [ $ret24 -eq 0 ]; then
|
||||
cpuid_ssbd='AMD SSBD in SPEC_CTRL'
|
||||
#cpuid_ssbd_spec_ctrl=1
|
||||
@ -2740,8 +2758,8 @@ check_cpu()
|
||||
elif is_hygon; then
|
||||
_info " * Speculative Store Bypass Disable (SSBD)"
|
||||
_info_nol " * CPU indicates SSBD capability: "
|
||||
read_cpuid 0x80000008 $EBX 24 1 1; ret24=$?
|
||||
read_cpuid 0x80000008 $EBX 25 1 1; ret25=$?
|
||||
read_cpuid 0x80000008 0x0 $EBX 24 1 1; ret24=$?
|
||||
read_cpuid 0x80000008 0x0 $EBX 25 1 1; ret25=$?
|
||||
|
||||
if [ $ret24 -eq 0 ]; then
|
||||
cpuid_ssbd='HYGON SSBD in SPEC_CTRL'
|
||||
@ -2764,13 +2782,13 @@ check_cpu()
|
||||
|
||||
if is_amd; then
|
||||
# similar to SSB_NO for intel
|
||||
read_cpuid 0x80000008 $EBX 26 1 1; ret=$?
|
||||
read_cpuid 0x80000008 0x0 $EBX 26 1 1; ret=$?
|
||||
if [ $ret -eq 0 ]; then
|
||||
amd_ssb_no=1
|
||||
fi
|
||||
elif is_hygon; then
|
||||
# indicate when speculative store bypass disable is no longer needed to prevent speculative loads bypassing older stores
|
||||
read_cpuid 0x80000008 $EBX 26 1 1; ret=$?
|
||||
read_cpuid 0x80000008 0x0 $EBX 26 1 1; ret=$?
|
||||
if [ $ret -eq 0 ]; then
|
||||
hygon_ssb_no=1
|
||||
_debug "hygon_ssb_no=1"
|
||||
@ -2821,7 +2839,7 @@ check_cpu()
|
||||
fi
|
||||
# CPUID of L1D
|
||||
_info_nol " * CPU indicates L1D flush capability: "
|
||||
read_cpuid 0x7 $EDX 28 1 1; ret=$?
|
||||
read_cpuid 0x7 0x0 $EDX 28 1 1; ret=$?
|
||||
if [ $ret -eq 0 ]; then
|
||||
pstatus green YES "L1D flush feature bit"
|
||||
cpuid_l1df=1
|
||||
@ -2832,9 +2850,9 @@ check_cpu()
|
||||
fi
|
||||
|
||||
if is_intel; then
|
||||
_info " * Microarchitectural Data Sampling"
|
||||
_info " * Microarchitectural Data Sampling"
|
||||
_info_nol " * VERW instruction is available: "
|
||||
read_cpuid 0x7 $EDX 10 1 1; ret=$?
|
||||
read_cpuid 0x7 0x0 $EDX 10 1 1; ret=$?
|
||||
if [ $ret -eq 0 ]; then
|
||||
cpuid_md_clear=1
|
||||
pstatus green YES "MD_CLEAR feature bit"
|
||||
@ -2852,7 +2870,7 @@ check_cpu()
|
||||
_info_nol " * CPU indicates ARCH_CAPABILITIES MSR availability: "
|
||||
cpuid_arch_capabilities=-1
|
||||
# A processor supports the ARCH_CAPABILITIES MSR if it enumerates CPUID (EAX=7H,ECX=0):EDX[29] as 1
|
||||
read_cpuid 0x7 $EDX 29 1 1; ret=$?
|
||||
read_cpuid 0x7 0x0 $EDX 29 1 1; ret=$?
|
||||
if [ $ret -eq 0 ]; then
|
||||
pstatus green YES
|
||||
cpuid_arch_capabilities=1
|
||||
@ -3057,7 +3075,7 @@ check_cpu()
|
||||
ret=1
|
||||
cpuid_rtm=0
|
||||
if is_intel; then
|
||||
read_cpuid 0x7 $EBX 11 1 1; ret=$?
|
||||
read_cpuid 0x7 0x0 $EBX 11 1 1; ret=$?
|
||||
fi
|
||||
if [ $ret -eq 0 ]; then
|
||||
cpuid_rtm=1
|
||||
@ -3073,7 +3091,7 @@ check_cpu()
|
||||
ret=1
|
||||
cpuid_sgx=0
|
||||
if is_intel; then
|
||||
read_cpuid 0x7 $EBX 2 1 1; ret=$?
|
||||
read_cpuid 0x7 0x0 $EBX 2 1 1; ret=$?
|
||||
fi
|
||||
if [ $ret -eq 0 ]; then
|
||||
pstatus blue YES
|
||||
@ -3092,7 +3110,7 @@ check_cpu()
|
||||
cpuid_srbds=0
|
||||
srbds_on=0
|
||||
if is_intel; then
|
||||
read_cpuid 0x7 $EDX 9 1 1; ret=$?
|
||||
read_cpuid 0x7 0x0 $EDX 9 1 1; ret=$?
|
||||
fi
|
||||
if [ $ret -eq 0 ]; then
|
||||
pstatus blue YES
|
||||
@ -4092,14 +4110,14 @@ pti_performance_check()
|
||||
if [ -e "$procfs/cpuinfo" ] && grep ^flags "$procfs/cpuinfo" | grep -qw pcid; then
|
||||
cpu_pcid=1
|
||||
else
|
||||
read_cpuid 0x1 $ECX 17 1 1; ret=$?
|
||||
read_cpuid 0x1 0x0 $ECX 17 1 1; ret=$?
|
||||
[ $ret -eq 0 ] && cpu_pcid=1
|
||||
fi
|
||||
|
||||
if [ -e "$procfs/cpuinfo" ] && grep ^flags "$procfs/cpuinfo" | grep -qw invpcid; then
|
||||
cpu_invpcid=1
|
||||
else
|
||||
read_cpuid 0x7 $EBX 10 1 1; ret=$?
|
||||
read_cpuid 0x7 0x0 $EBX 10 1 1; ret=$?
|
||||
[ $ret -eq 0 ] && cpu_invpcid=1
|
||||
fi
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user