Merge c40b2b3195
into 5962d20ba7
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commit
0eb563adc6
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@ -1511,6 +1511,23 @@ read_msr()
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return 0
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}
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check_dd()
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{
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# Old versions of dd do not support iflag=skip_bytes so are unable to read cpuid and MSR
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# also some versions may fail silently.
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if [ "$os" = Linux ]; then
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printf ddskipsupport | dd bs=2 skip=2 iflag=skip_bytes count=2 2>/dev/null | grep skip >/dev/null
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dd_support=$?
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if [ "$dd_support" != "0" ]; then
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_debug "dd does not support iflag=skip_bytes"
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_warn "Obsolete version of dd does not support required features"
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_info
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fi
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else
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dd_support="0"
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fi
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}
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check_cpu()
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{
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_info "\033[1;34mHardware check\033[0m"
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@ -1520,6 +1537,10 @@ check_cpu()
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fi
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_info "* Hardware support (CPU microcode) for mitigation techniques"
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if [ "$dd_support" != "0" ]; then
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pstatus yellow UNKNOWN "* Unable to determine Hardware support (CPU microcode) mitigation techniques"
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return
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fi
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_info " * Indirect Branch Restricted Speculation (IBRS)"
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_info_nol " * SPEC_CTRL MSR is available: "
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number_of_cpus
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@ -1878,6 +1899,11 @@ check_cpu()
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check_cpu_vulnerabilities()
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{
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_info "* CPU vulnerability to the speculative execution attack variants"
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if [ "$dd_support" != "0" ]; then
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pstatus yellow UNKNOWN "* Unable to determine CPU vulnerability to the speculative execution attack variants"
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return
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fi
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for v in 1 2 3 3a 4; do
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_info_nol " * Vulnerable to Variant $v: "
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if is_cpu_vulnerable $v; then
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@ -3064,6 +3090,7 @@ check_variant4()
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}
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if [ "$opt_no_hw" = 0 ] && [ -z "$opt_arch_prefix" ]; then
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check_dd
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check_cpu
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check_cpu_vulnerabilities
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_info
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