From 54c2ad4a764658ec8a9aadc52c749eabf1de73a0 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Thu, 5 Jan 2023 12:34:02 +0000
Subject: [PATCH] Detect OCI containers

Podman using OCI containers sets container=oci in PID 1's environment.
Detect that and print "oci" fact.

This patch was originally contributed by Alessandro Valentini.  I
modified it and added tests and documentation.

Reported-by: Alessandro Valentini
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=2155233
---
 configure.ac                          |   2 +
 tests/oci/Makefile.am                 |  28 ++
 tests/oci/proc/1/environ              | Bin 0 -> 124 bytes
 tests/oci/proc/cpuinfo                | 671 ++++++++++++++++++++++++++++++++++
 tests/oci/sbin/dmidecode              |   7 +
 tests/oci/sbin/uname                  |   2 +
 tests/oci/sbin/virt-what-cpuid-helper |   2 +
 tests/oci/test.sh                     |  32 ++
 virt-what.in                          |   6 +
 virt-what.pod                         |   8 +-
 10 files changed, 757 insertions(+), 1 deletion(-)
 create mode 100644 tests/oci/Makefile.am
 create mode 100644 tests/oci/proc/1/environ
 create mode 100644 tests/oci/proc/cpuinfo
 create mode 100755 tests/oci/sbin/dmidecode
 create mode 100755 tests/oci/sbin/uname
 create mode 100755 tests/oci/sbin/virt-what-cpuid-helper
 create mode 100755 tests/oci/test.sh

diff --git a/configure.ac b/configure.ac
index 8f808a3..a80a4b6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -56,6 +56,7 @@ tests="\
 	lx86 \
 	lxc \
 	nutanix-ahv \
+	oci \
 	parallels-desktop \
 	podman \
 	ppc64-baremetal \
@@ -104,6 +105,7 @@ AC_CONFIG_FILES([Makefile
 	         tests/lx86/Makefile
 	         tests/lxc/Makefile
 	         tests/nutanix-ahv/Makefile
+	         tests/oci/Makefile
 	         tests/parallels-desktop/Makefile
 	         tests/podman/Makefile
 	         tests/ppc64-baremetal/Makefile
diff --git a/tests/oci/Makefile.am b/tests/oci/Makefile.am
new file mode 100644
index 0000000..b2f6f24
--- /dev/null
+++ b/tests/oci/Makefile.am
@@ -0,0 +1,28 @@
+# Makefile for virt-what
+# Copyright (C) 2008-2023 Red Hat Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+CLEANFILES = *~
+
+TESTS = test.sh
+
+EXTRA_DIST = \
+	test.sh \
+	proc/1/environ \
+	proc/cpuinfo \
+	sbin/dmidecode \
+	sbin/uname \
+	sbin/virt-what-cpuid-helper
diff --git a/tests/oci/proc/1/environ b/tests/oci/proc/1/environ
new file mode 100644
index 0000000000000000000000000000000000000000..03d40a45377eaeccef15532734d2f5b7fd42234e
GIT binary patch
literal 124
zcmWG=4DqnlFD)+8&&f|t%+W7S%FMGu;={QJ39t}^3uH2cxCZ&!R+OX`<uWAa=anR8
r=A{<d<|k(|c=-Fe+UghO=a&GP!6AN*KyGSUVw$0Wg<+zpc`5?{dKM{B

literal 0
HcmV?d00001

diff --git a/tests/oci/proc/cpuinfo b/tests/oci/proc/cpuinfo
new file mode 100644
index 0000000..82b147b
--- /dev/null
+++ b/tests/oci/proc/cpuinfo
@@ -0,0 +1,671 @@
+processor	: 0
+vendor_id	: AuthenticAMD
+cpu family	: 23
+model		: 113
+model name	: AMD Ryzen 9 3900X 12-Core Processor
+stepping	: 0
+microcode	: 0x8701013
+cpu MHz		: 2200.000
+cache size	: 512 KB
+physical id	: 0
+siblings	: 24
+core id		: 0
+cpu cores	: 12
+apicid		: 0
+initial apicid	: 0
+fpu		: yes
+fpu_exception	: yes
+cpuid level	: 16
+wp		: yes
+flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif v_spec_ctrl umip rdpid overflow_recov succor smca sev sev_es
+bugs		: sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass retbleed
+bogomips	: 7585.66
+TLB size	: 3072 4K pages
+clflush size	: 64
+cache_alignment	: 64
+address sizes	: 43 bits physical, 48 bits virtual
+power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]
+
+processor	: 1
+vendor_id	: AuthenticAMD
+cpu family	: 23
+model		: 113
+model name	: AMD Ryzen 9 3900X 12-Core Processor
+stepping	: 0
+microcode	: 0x8701013
+cpu MHz		: 2200.000
+cache size	: 512 KB
+physical id	: 0
+siblings	: 24
+core id		: 1
+cpu cores	: 12
+apicid		: 2
+initial apicid	: 2
+fpu		: yes
+fpu_exception	: yes
+cpuid level	: 16
+wp		: yes
+flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif v_spec_ctrl umip rdpid overflow_recov succor smca sev sev_es
+bugs		: sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass retbleed
+bogomips	: 7585.66
+TLB size	: 3072 4K pages
+clflush size	: 64
+cache_alignment	: 64
+address sizes	: 43 bits physical, 48 bits virtual
+power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]
+
+processor	: 2
+vendor_id	: AuthenticAMD
+cpu family	: 23
+model		: 113
+model name	: AMD Ryzen 9 3900X 12-Core Processor
+stepping	: 0
+microcode	: 0x8701013
+cpu MHz		: 2200.000
+cache size	: 512 KB
+physical id	: 0
+siblings	: 24
+core id		: 2
+cpu cores	: 12
+apicid		: 4
+initial apicid	: 4
+fpu		: yes
+fpu_exception	: yes
+cpuid level	: 16
+wp		: yes
+flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif v_spec_ctrl umip rdpid overflow_recov succor smca sev sev_es
+bugs		: sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass retbleed
+bogomips	: 7585.66
+TLB size	: 3072 4K pages
+clflush size	: 64
+cache_alignment	: 64
+address sizes	: 43 bits physical, 48 bits virtual
+power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]
+
+processor	: 3
+vendor_id	: AuthenticAMD
+cpu family	: 23
+model		: 113
+model name	: AMD Ryzen 9 3900X 12-Core Processor
+stepping	: 0
+microcode	: 0x8701013
+cpu MHz		: 2200.000
+cache size	: 512 KB
+physical id	: 0
+siblings	: 24
+core id		: 4
+cpu cores	: 12
+apicid		: 8
+initial apicid	: 8
+fpu		: yes
+fpu_exception	: yes
+cpuid level	: 16
+wp		: yes
+flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif v_spec_ctrl umip rdpid overflow_recov succor smca sev sev_es
+bugs		: sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass retbleed
+bogomips	: 7585.66
+TLB size	: 3072 4K pages
+clflush size	: 64
+cache_alignment	: 64
+address sizes	: 43 bits physical, 48 bits virtual
+power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]
+
+processor	: 4
+vendor_id	: AuthenticAMD
+cpu family	: 23
+model		: 113
+model name	: AMD Ryzen 9 3900X 12-Core Processor
+stepping	: 0
+microcode	: 0x8701013
+cpu MHz		: 2200.000
+cache size	: 512 KB
+physical id	: 0
+siblings	: 24
+core id		: 5
+cpu cores	: 12
+apicid		: 10
+initial apicid	: 10
+fpu		: yes
+fpu_exception	: yes
+cpuid level	: 16
+wp		: yes
+flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif v_spec_ctrl umip rdpid overflow_recov succor smca sev sev_es
+bugs		: sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass retbleed
+bogomips	: 7585.66
+TLB size	: 3072 4K pages
+clflush size	: 64
+cache_alignment	: 64
+address sizes	: 43 bits physical, 48 bits virtual
+power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]
+
+processor	: 5
+vendor_id	: AuthenticAMD
+cpu family	: 23
+model		: 113
+model name	: AMD Ryzen 9 3900X 12-Core Processor
+stepping	: 0
+microcode	: 0x8701013
+cpu MHz		: 2200.000
+cache size	: 512 KB
+physical id	: 0
+siblings	: 24
+core id		: 6
+cpu cores	: 12
+apicid		: 12
+initial apicid	: 12
+fpu		: yes
+fpu_exception	: yes
+cpuid level	: 16
+wp		: yes
+flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif v_spec_ctrl umip rdpid overflow_recov succor smca sev sev_es
+bugs		: sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass retbleed
+bogomips	: 7585.66
+TLB size	: 3072 4K pages
+clflush size	: 64
+cache_alignment	: 64
+address sizes	: 43 bits physical, 48 bits virtual
+power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]
+
+processor	: 6
+vendor_id	: AuthenticAMD
+cpu family	: 23
+model		: 113
+model name	: AMD Ryzen 9 3900X 12-Core Processor
+stepping	: 0
+microcode	: 0x8701013
+cpu MHz		: 2194.032
+cache size	: 512 KB
+physical id	: 0
+siblings	: 24
+core id		: 8
+cpu cores	: 12
+apicid		: 16
+initial apicid	: 16
+fpu		: yes
+fpu_exception	: yes
+cpuid level	: 16
+wp		: yes
+flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif v_spec_ctrl umip rdpid overflow_recov succor smca sev sev_es
+bugs		: sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass retbleed
+bogomips	: 7585.66
+TLB size	: 3072 4K pages
+clflush size	: 64
+cache_alignment	: 64
+address sizes	: 43 bits physical, 48 bits virtual
+power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]
+
+processor	: 7
+vendor_id	: AuthenticAMD
+cpu family	: 23
+model		: 113
+model name	: AMD Ryzen 9 3900X 12-Core Processor
+stepping	: 0
+microcode	: 0x8701013
+cpu MHz		: 2200.000
+cache size	: 512 KB
+physical id	: 0
+siblings	: 24
+core id		: 9
+cpu cores	: 12
+apicid		: 18
+initial apicid	: 18
+fpu		: yes
+fpu_exception	: yes
+cpuid level	: 16
+wp		: yes
+flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif v_spec_ctrl umip rdpid overflow_recov succor smca sev sev_es
+bugs		: sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass retbleed
+bogomips	: 7585.66
+TLB size	: 3072 4K pages
+clflush size	: 64
+cache_alignment	: 64
+address sizes	: 43 bits physical, 48 bits virtual
+power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]
+
+processor	: 8
+vendor_id	: AuthenticAMD
+cpu family	: 23
+model		: 113
+model name	: AMD Ryzen 9 3900X 12-Core Processor
+stepping	: 0
+microcode	: 0x8701013
+cpu MHz		: 2200.000
+cache size	: 512 KB
+physical id	: 0
+siblings	: 24
+core id		: 10
+cpu cores	: 12
+apicid		: 20
+initial apicid	: 20
+fpu		: yes
+fpu_exception	: yes
+cpuid level	: 16
+wp		: yes
+flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif v_spec_ctrl umip rdpid overflow_recov succor smca sev sev_es
+bugs		: sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass retbleed
+bogomips	: 7585.66
+TLB size	: 3072 4K pages
+clflush size	: 64
+cache_alignment	: 64
+address sizes	: 43 bits physical, 48 bits virtual
+power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]
+
+processor	: 9
+vendor_id	: AuthenticAMD
+cpu family	: 23
+model		: 113
+model name	: AMD Ryzen 9 3900X 12-Core Processor
+stepping	: 0
+microcode	: 0x8701013
+cpu MHz		: 2200.000
+cache size	: 512 KB
+physical id	: 0
+siblings	: 24
+core id		: 12
+cpu cores	: 12
+apicid		: 24
+initial apicid	: 24
+fpu		: yes
+fpu_exception	: yes
+cpuid level	: 16
+wp		: yes
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+cpuid level	: 16
+wp		: yes
+flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif v_spec_ctrl umip rdpid overflow_recov succor smca sev sev_es
+bugs		: sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass retbleed
+bogomips	: 7585.66
+TLB size	: 3072 4K pages
+clflush size	: 64
+cache_alignment	: 64
+address sizes	: 43 bits physical, 48 bits virtual
+power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]
+
+processor	: 21
+vendor_id	: AuthenticAMD
+cpu family	: 23
+model		: 113
+model name	: AMD Ryzen 9 3900X 12-Core Processor
+stepping	: 0
+microcode	: 0x8701013
+cpu MHz		: 2200.000
+cache size	: 512 KB
+physical id	: 0
+siblings	: 24
+core id		: 12
+cpu cores	: 12
+apicid		: 25
+initial apicid	: 25
+fpu		: yes
+fpu_exception	: yes
+cpuid level	: 16
+wp		: yes
+flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif v_spec_ctrl umip rdpid overflow_recov succor smca sev sev_es
+bugs		: sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass retbleed
+bogomips	: 7585.66
+TLB size	: 3072 4K pages
+clflush size	: 64
+cache_alignment	: 64
+address sizes	: 43 bits physical, 48 bits virtual
+power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]
+
+processor	: 22
+vendor_id	: AuthenticAMD
+cpu family	: 23
+model		: 113
+model name	: AMD Ryzen 9 3900X 12-Core Processor
+stepping	: 0
+microcode	: 0x8701013
+cpu MHz		: 2200.000
+cache size	: 512 KB
+physical id	: 0
+siblings	: 24
+core id		: 13
+cpu cores	: 12
+apicid		: 27
+initial apicid	: 27
+fpu		: yes
+fpu_exception	: yes
+cpuid level	: 16
+wp		: yes
+flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif v_spec_ctrl umip rdpid overflow_recov succor smca sev sev_es
+bugs		: sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass retbleed
+bogomips	: 7585.66
+TLB size	: 3072 4K pages
+clflush size	: 64
+cache_alignment	: 64
+address sizes	: 43 bits physical, 48 bits virtual
+power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]
+
+processor	: 23
+vendor_id	: AuthenticAMD
+cpu family	: 23
+model		: 113
+model name	: AMD Ryzen 9 3900X 12-Core Processor
+stepping	: 0
+microcode	: 0x8701013
+cpu MHz		: 2194.867
+cache size	: 512 KB
+physical id	: 0
+siblings	: 24
+core id		: 14
+cpu cores	: 12
+apicid		: 29
+initial apicid	: 29
+fpu		: yes
+fpu_exception	: yes
+cpuid level	: 16
+wp		: yes
+flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf rapl pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_llc mwaitx cpb cat_l3 cdp_l3 hw_pstate ssbd mba ibpb stibp vmmcall fsgsbase bmi1 avx2 smep bmi2 cqm rdt_a rdseed adx smap clflushopt clwb sha_ni xsaveopt xsavec xgetbv1 xsaves cqm_llc cqm_occup_llc cqm_mbm_total cqm_mbm_local clzero irperf xsaveerptr rdpru wbnoinvd arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic v_vmsave_vmload vgif v_spec_ctrl umip rdpid overflow_recov succor smca sev sev_es
+bugs		: sysret_ss_attrs spectre_v1 spectre_v2 spec_store_bypass retbleed
+bogomips	: 7585.66
+TLB size	: 3072 4K pages
+clflush size	: 64
+cache_alignment	: 64
+address sizes	: 43 bits physical, 48 bits virtual
+power management: ts ttp tm hwpstate cpb eff_freq_ro [13] [14]
diff --git a/tests/oci/sbin/dmidecode b/tests/oci/sbin/dmidecode
new file mode 100755
index 0000000..48a6de1
--- /dev/null
+++ b/tests/oci/sbin/dmidecode
@@ -0,0 +1,7 @@
+#!/bin/sh -
+cat <<'EOF'
+# dmidecode 3.3
+Scanning /dev/mem for entry point.
+/dev/mem: No such file or directory
+EOF
+exit 1
diff --git a/tests/oci/sbin/uname b/tests/oci/sbin/uname
new file mode 100755
index 0000000..ab0ec89
--- /dev/null
+++ b/tests/oci/sbin/uname
@@ -0,0 +1,2 @@
+#!/bin/sh -
+echo x86_64
diff --git a/tests/oci/sbin/virt-what-cpuid-helper b/tests/oci/sbin/virt-what-cpuid-helper
new file mode 100755
index 0000000..481e1e6
--- /dev/null
+++ b/tests/oci/sbin/virt-what-cpuid-helper
@@ -0,0 +1,2 @@
+#!/bin/sh -
+# no output
diff --git a/tests/oci/test.sh b/tests/oci/test.sh
new file mode 100755
index 0000000..5028ebc
--- /dev/null
+++ b/tests/oci/test.sh
@@ -0,0 +1,32 @@
+# Test for OCI
+# Copyright (C) 2008-2023 Red Hat Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+output="$(PATH=../..:$PATH virt-what --test-root=. 2>&1)"
+expected="oci"
+
+if [ "$output" != "$expected" ]; then
+    echo "$0: test failed because output did not match expected"
+    echo "Expected output was:"
+    echo "----------------------------------------"
+    echo "$expected"
+    echo "----------------------------------------"
+    echo "But the actual output of the program was:"
+    echo "----------------------------------------"
+    echo "$output"
+    echo "----------------------------------------"
+    exit 1
+fi
diff --git a/virt-what.in b/virt-what.in
index c6e4a1e..102e23f 100644
--- a/virt-what.in
+++ b/virt-what.in
@@ -192,6 +192,12 @@ if [ -f "${root}/.dockerenv" ] || [ -f "${root}/.dockerinit" ] || \
     echo docker
 fi
 
+# Check for OCI.
+if [ -e "${root}/proc/1/environ" ] &&
+    cat "${root}/proc/1/environ" | tr '\000' '\n' | grep -Eiq '^container=oci'; then
+    echo oci
+fi
+
 # Check for Podman.
 if [ -e "${root}/proc/1/environ" ] &&
     cat "${root}/proc/1/environ" | tr '\000' '\n' | grep -Eiq '^container=podman'; then
diff --git a/virt-what.pod b/virt-what.pod
index 2c346bd..9dbc079 100644
--- a/virt-what.pod
+++ b/virt-what.pod
@@ -203,6 +203,12 @@ The guest is running inside Nutanix Acropolis Hypervisor (AHV).
 
 Status: confirmed by RWMJ.
 
+=item B<oci>
+
+The guest is running in an OCI container.
+
+Status: contributed by Alessandro Valentini, confirmed by RWMJ
+
 =item B<openvz>
 
 The guest appears to be running inside an OpenVZ or Virtuozzo
@@ -226,7 +232,7 @@ Status: contributed by Justin Clift
 
 =item B<podman>
 
-This is a Podman container.
+This is a Podman container.  (See also C<oci> above.)
 
 Status: contributed by Jordan Webb
 
-- 
1.8.3.1