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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/370_hw_vmm.sh
+8 -1
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@@ -127,7 +127,14 @@ is_running_as_guest() {
if [ "${g_is_guest_vm_cached:-0}" != 1 ]; then
g_is_guest_vm=0
g_is_guest_vm_reason=''
if [ -e "$g_procfs/cpuinfo" ] && grep -qw 'hypervisor' "$g_procfs/cpuinfo" 2>/dev/null; then
# A Xen dom0 runs on top of the hypervisor and therefore also has the
# 'hypervisor' CPUID flag set, but it's the privileged control domain:
# it has direct hardware access and a truthful view of the host CPU
# topology, so it must not be classified as a guest (#343). Check it
# before the cpuinfo probe below, which would otherwise match.
if is_xen_dom0; then
g_is_guest_vm=0
elif [ -e "$g_procfs/cpuinfo" ] && grep -qw 'hypervisor' "$g_procfs/cpuinfo" 2>/dev/null; then
g_is_guest_vm=1
g_is_guest_vm_reason="'hypervisor' flag in $g_procfs/cpuinfo"
fi