peter/spectre-meltdown-checker
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spectre-meltdown-checker
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ibrs can't be enabled on no ibrs cpu 

If the cpu is identified, and does not support SPEC_CTRL or IBRS, then ibrs can't be enabled, even if supported by the kernel.
Instead of reporting IBRS enabled and active UNKNOWN, report IBRS enabled and active NO.
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rrobgill 2018-05-06 15:47:45 +10:00 committed by GitHub
parent 3568293570
commit 9063a7fd20
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spectre-meltdown-checker.sh
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@ -2121,6 +2121,10 @@ check_variant2_linux()
if [ "$ibpb_enabled" = 2 ]; then if [ "$ibpb_enabled" = 2 ]; then
# if ibpb=2, ibrs is forcefully=0 # if ibpb=2, ibrs is forcefully=0
pstatus blue NO "IBPB used instead of IBRS in all kernel entrypoints" pstatus blue NO "IBPB used instead of IBRS in all kernel entrypoints"
else
if [ ! "$cpuid_ibrs" = 'SPEC_CTRL' ] && [ ! "cpuid_ibrs" = 'IBRS_SUPPORT' ] && [ ! "cpuid_spec_ctrl" = -1 ]; then
pstatus yellow NO;
_debug "ibrs: known cpu not supporting SPEC-CTRL or IBRS";
else else
# 0 means disabled # 0 means disabled
# 1 is enabled only for kernel space # 1 is enabled only for kernel space
@ -2140,6 +2144,7 @@ check_variant2_linux()
*) pstatus yellow UNKNOWN;; *) pstatus yellow UNKNOWN;;
esac esac
fi fi
fi
else else
pstatus blue N/A "not testable in offline mode" pstatus blue N/A "not testable in offline mode"
fi fi