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fix: xen: consider Xen dom0 as non-guest (#343 continued)

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(cherry picked from commit bc00a81526)
This commit is contained in:
Stéphane Lesimple
2026-07-30 15:51:23 +02:00
parent cc29aaba6b
commit d5cbaaa7c3
5 changed files with 62 additions and 17 deletions
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src/libs/360_cpu_smt.sh
+12 -2
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@@ -46,8 +46,18 @@ is_arm_cpu() {
# Check whether SMT (HyperThreading) is enabled on the system
# Returns: 0 if SMT enabled, 1 otherwise
is_cpu_smt_enabled() {
local siblings cpucores
# SMT / HyperThreading is enabled if siblings != cpucores
local siblings cpucores smt_active
# Most reliable: /sys/devices/system/cpu/smt/active mirrors the kernel's
# sched_smt_active() (1=SMT active, 0=not), which is exactly what the kernel
# itself uses to derive the "SMT (disabled|vulnerable)" vulnerability strings.
if [ -r /sys/devices/system/cpu/smt/active ]; then
smt_active=$(cat /sys/devices/system/cpu/smt/active 2>/dev/null)
case "$smt_active" in
1) return 0 ;;
0) return 1 ;;
esac
fi
# Fallback: SMT / HyperThreading is enabled if siblings != cpucores
if [ -e "$g_procfs/cpuinfo" ]; then
siblings=$(awk '/^siblings/ {print $3;exit}' "$g_procfs/cpuinfo")
cpucores=$(awk '/^cpu cores/ {print $4;exit}' "$g_procfs/cpuinfo")