From: Andrea Bolognani <abologna@redhat.com>
Date: Wed, 30 Jul 2025 12:56:00 +0000 (+0200)
Subject: tests: Add tests for SEV firmware selection
X-Git-Tag: v11.8.0-rc1~15
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=20813b87b7425d66bd889221ca2fe52e6c01777c;p=thirdparty%2Flibvirt.git

tests: Add tests for SEV firmware selection

One of the new test cases demonstrates how firmware
autoselection doesn't currently work correctly for domains
using SEV-SNP: the descriptor for a suitable firmware exists,
and yet it doesn't get picked up.

Another test cases shows that, while firmware autoselection
succeeds for non-SNP SEV domains, the results are not the
expected ones: the generic (stateful) edk2 build is used
instead of the SEV-specific (stateless) one. This will be
addressed in a future patch by updating the descriptors.

Finally, one test case provides coverage for the uncommon
scenario of stateful firmware being explicitly requested by
the user.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Jim Fehlig <jfehlig@suse.com>
---

diff --git a/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.x86_64-latest+amdsev.err b/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.x86_64-latest+amdsev.err
new file mode 100644
index 0000000000..3edb2b3451
--- /dev/null
+++ b/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.x86_64-latest+amdsev.err
@@ -0,0 +1 @@
+operation failed: Unable to find 'efi' firmware that is compatible with the current configuration
diff --git a/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.x86_64-latest+amdsev.xml b/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.x86_64-latest+amdsev.xml
new file mode 100644
index 0000000000..81ac7888ea
--- /dev/null
+++ b/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.x86_64-latest+amdsev.xml
@@ -0,0 +1,38 @@
+<domain type='kvm'>
+  <name>guest</name>
+  <uuid>63840878-0deb-4095-97e6-fc444d9bc9fa</uuid>
+  <memory unit='KiB'>1048576</memory>
+  <currentMemory unit='KiB'>1048576</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os firmware='efi'>
+    <type arch='x86_64' machine='pc-q35-10.0'>hvm</type>
+    <loader format='raw'/>
+    <boot dev='hd'/>
+  </os>
+  <features>
+    <acpi/>
+  </features>
+  <cpu mode='custom' match='exact' check='none'>
+    <model fallback='forbid'>qemu64</model>
+  </cpu>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <controller type='usb' index='0' model='none'/>
+    <controller type='sata' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
+    </controller>
+    <controller type='pci' index='0' model='pcie-root'/>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <audio id='1' type='none'/>
+    <watchdog model='itco' action='reset'/>
+    <memballoon model='none'/>
+  </devices>
+  <launchSecurity type='sev-snp'>
+    <policy>0x00030000</policy>
+  </launchSecurity>
+</domain>
diff --git a/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.xml b/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.xml
new file mode 100644
index 0000000000..4bb363d07a
--- /dev/null
+++ b/tests/qemuxmlconfdata/firmware-auto-efi-sev-snp.xml
@@ -0,0 +1,20 @@
+<domain type='kvm'>
+  <name>guest</name>
+  <uuid>63840878-0deb-4095-97e6-fc444d9bc9fa</uuid>
+  <memory unit='KiB'>1048576</memory>
+  <vcpu placement='static'>1</vcpu>
+  <os firmware='efi'>
+    <type arch='x86_64' machine='pc-q35-10.0'>hvm</type>
+  </os>
+  <features>
+    <acpi/>
+  </features>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <controller type='usb' model='none'/>
+    <memballoon model='none'/>
+  </devices>
+  <launchSecurity type='sev-snp'>
+    <policy>0x30000</policy>
+  </launchSecurity>
+</domain>
diff --git a/tests/qemuxmlconfdata/firmware-auto-efi-sev-stateful.x86_64-latest+amdsev.args b/tests/qemuxmlconfdata/firmware-auto-efi-sev-stateful.x86_64-latest+amdsev.args
new file mode 100644
index 0000000000..550ac52b8a
--- /dev/null
+++ b/tests/qemuxmlconfdata/firmware-auto-efi-sev-stateful.x86_64-latest+amdsev.args
@@ -0,0 +1,37 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/var/lib/libvirt/qemu/domain--1-guest \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-guest/.local/share \
+XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-guest/.cache \
+XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-guest/.config \
+/usr/bin/qemu-system-x86_64 \
+-name guest=guest,debug-threads=on \
+-S \
+-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain--1-guest/master-key.aes"}' \
+-blockdev '{"driver":"file","filename":"/usr/share/edk2/ovmf/OVMF_CODE.fd","node-name":"libvirt-pflash0-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-pflash0-format","read-only":true,"driver":"raw","file":"libvirt-pflash0-storage"}' \
+-blockdev '{"driver":"file","filename":"/var/lib/libvirt/qemu/nvram/guest_VARS.fd","node-name":"libvirt-pflash1-storage","read-only":false}' \
+-machine pc-q35-10.0,usb=off,dump-guest-core=off,memory-backend=pc.ram,confidential-guest-support=lsec0,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-storage,acpi=on \
+-accel kvm \
+-cpu qemu64 \
+-m size=1048576k \
+-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":1073741824}' \
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid 63840878-0deb-4095-97e6-fc444d9bc9fa \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-boot strict=on \
+-audiodev '{"id":"audio1","driver":"none"}' \
+-global ICH9-LPC.noreboot=off \
+-watchdog-action reset \
+-object '{"qom-type":"sev-guest","id":"lsec0","cbitpos":51,"reduced-phys-bits":1,"policy":196608}' \
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
+-msg timestamp=on
diff --git a/tests/qemuxmlconfdata/firmware-auto-efi-sev-stateful.x86_64-latest+amdsev.xml b/tests/qemuxmlconfdata/firmware-auto-efi-sev-stateful.x86_64-latest+amdsev.xml
new file mode 100644
index 0000000000..b9a9ba8aa8
--- /dev/null
+++ b/tests/qemuxmlconfdata/firmware-auto-efi-sev-stateful.x86_64-latest+amdsev.xml
@@ -0,0 +1,43 @@
+<domain type='kvm'>
+  <name>guest</name>
+  <uuid>63840878-0deb-4095-97e6-fc444d9bc9fa</uuid>
+  <memory unit='KiB'>1048576</memory>
+  <currentMemory unit='KiB'>1048576</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os firmware='efi'>
+    <type arch='x86_64' machine='pc-q35-10.0'>hvm</type>
+    <firmware>
+      <feature enabled='no' name='enrolled-keys'/>
+      <feature enabled='no' name='secure-boot'/>
+    </firmware>
+    <loader readonly='yes' type='pflash' stateless='no' format='raw'>/usr/share/edk2/ovmf/OVMF_CODE.fd</loader>
+    <nvram template='/usr/share/edk2/ovmf/OVMF_VARS.fd' templateFormat='raw' format='raw'>/var/lib/libvirt/qemu/nvram/guest_VARS.fd</nvram>
+    <boot dev='hd'/>
+  </os>
+  <features>
+    <acpi/>
+  </features>
+  <cpu mode='custom' match='exact' check='none'>
+    <model fallback='forbid'>qemu64</model>
+  </cpu>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <controller type='usb' index='0' model='none'/>
+    <controller type='sata' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
+    </controller>
+    <controller type='pci' index='0' model='pcie-root'/>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <audio id='1' type='none'/>
+    <watchdog model='itco' action='reset'/>
+    <memballoon model='none'/>
+  </devices>
+  <launchSecurity type='sev'>
+    <policy>0x30000</policy>
+  </launchSecurity>
+</domain>
diff --git a/tests/qemuxmlconfdata/firmware-auto-efi-sev-stateful.xml b/tests/qemuxmlconfdata/firmware-auto-efi-sev-stateful.xml
new file mode 100644
index 0000000000..d6195f60e2
--- /dev/null
+++ b/tests/qemuxmlconfdata/firmware-auto-efi-sev-stateful.xml
@@ -0,0 +1,21 @@
+<domain type='kvm'>
+  <name>guest</name>
+  <uuid>63840878-0deb-4095-97e6-fc444d9bc9fa</uuid>
+  <memory unit='KiB'>1048576</memory>
+  <vcpu placement='static'>1</vcpu>
+  <os firmware='efi'>
+    <type arch='x86_64' machine='pc-q35-10.0'>hvm</type>
+    <loader stateless='no'/>
+  </os>
+  <features>
+    <acpi/>
+  </features>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <controller type='usb' model='none'/>
+    <memballoon model='none'/>
+  </devices>
+  <launchSecurity type='sev'>
+    <policy>0x30000</policy>
+  </launchSecurity>
+</domain>
diff --git a/tests/qemuxmlconfdata/firmware-auto-efi-sev.x86_64-latest+amdsev.args b/tests/qemuxmlconfdata/firmware-auto-efi-sev.x86_64-latest+amdsev.args
new file mode 100644
index 0000000000..550ac52b8a
--- /dev/null
+++ b/tests/qemuxmlconfdata/firmware-auto-efi-sev.x86_64-latest+amdsev.args
@@ -0,0 +1,37 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/var/lib/libvirt/qemu/domain--1-guest \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/var/lib/libvirt/qemu/domain--1-guest/.local/share \
+XDG_CACHE_HOME=/var/lib/libvirt/qemu/domain--1-guest/.cache \
+XDG_CONFIG_HOME=/var/lib/libvirt/qemu/domain--1-guest/.config \
+/usr/bin/qemu-system-x86_64 \
+-name guest=guest,debug-threads=on \
+-S \
+-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/var/lib/libvirt/qemu/domain--1-guest/master-key.aes"}' \
+-blockdev '{"driver":"file","filename":"/usr/share/edk2/ovmf/OVMF_CODE.fd","node-name":"libvirt-pflash0-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-pflash0-format","read-only":true,"driver":"raw","file":"libvirt-pflash0-storage"}' \
+-blockdev '{"driver":"file","filename":"/var/lib/libvirt/qemu/nvram/guest_VARS.fd","node-name":"libvirt-pflash1-storage","read-only":false}' \
+-machine pc-q35-10.0,usb=off,dump-guest-core=off,memory-backend=pc.ram,confidential-guest-support=lsec0,pflash0=libvirt-pflash0-format,pflash1=libvirt-pflash1-storage,acpi=on \
+-accel kvm \
+-cpu qemu64 \
+-m size=1048576k \
+-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":1073741824}' \
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid 63840878-0deb-4095-97e6-fc444d9bc9fa \
+-display none \
+-no-user-config \
+-nodefaults \
+-chardev socket,id=charmonitor,fd=1729,server=on,wait=off \
+-mon chardev=charmonitor,id=monitor,mode=control \
+-rtc base=utc \
+-no-shutdown \
+-boot strict=on \
+-audiodev '{"id":"audio1","driver":"none"}' \
+-global ICH9-LPC.noreboot=off \
+-watchdog-action reset \
+-object '{"qom-type":"sev-guest","id":"lsec0","cbitpos":51,"reduced-phys-bits":1,"policy":196608}' \
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
+-msg timestamp=on
diff --git a/tests/qemuxmlconfdata/firmware-auto-efi-sev.x86_64-latest+amdsev.xml b/tests/qemuxmlconfdata/firmware-auto-efi-sev.x86_64-latest+amdsev.xml
new file mode 100644
index 0000000000..cbfdcdeee3
--- /dev/null
+++ b/tests/qemuxmlconfdata/firmware-auto-efi-sev.x86_64-latest+amdsev.xml
@@ -0,0 +1,43 @@
+<domain type='kvm'>
+  <name>guest</name>
+  <uuid>63840878-0deb-4095-97e6-fc444d9bc9fa</uuid>
+  <memory unit='KiB'>1048576</memory>
+  <currentMemory unit='KiB'>1048576</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os firmware='efi'>
+    <type arch='x86_64' machine='pc-q35-10.0'>hvm</type>
+    <firmware>
+      <feature enabled='no' name='enrolled-keys'/>
+      <feature enabled='no' name='secure-boot'/>
+    </firmware>
+    <loader readonly='yes' type='pflash' format='raw'>/usr/share/edk2/ovmf/OVMF_CODE.fd</loader>
+    <nvram template='/usr/share/edk2/ovmf/OVMF_VARS.fd' templateFormat='raw' format='raw'>/var/lib/libvirt/qemu/nvram/guest_VARS.fd</nvram>
+    <boot dev='hd'/>
+  </os>
+  <features>
+    <acpi/>
+  </features>
+  <cpu mode='custom' match='exact' check='none'>
+    <model fallback='forbid'>qemu64</model>
+  </cpu>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <controller type='usb' index='0' model='none'/>
+    <controller type='sata' index='0'>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x1f' function='0x2'/>
+    </controller>
+    <controller type='pci' index='0' model='pcie-root'/>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <audio id='1' type='none'/>
+    <watchdog model='itco' action='reset'/>
+    <memballoon model='none'/>
+  </devices>
+  <launchSecurity type='sev'>
+    <policy>0x30000</policy>
+  </launchSecurity>
+</domain>
diff --git a/tests/qemuxmlconfdata/firmware-auto-efi-sev.xml b/tests/qemuxmlconfdata/firmware-auto-efi-sev.xml
new file mode 100644
index 0000000000..69e0c2bd51
--- /dev/null
+++ b/tests/qemuxmlconfdata/firmware-auto-efi-sev.xml
@@ -0,0 +1,20 @@
+<domain type='kvm'>
+  <name>guest</name>
+  <uuid>63840878-0deb-4095-97e6-fc444d9bc9fa</uuid>
+  <memory unit='KiB'>1048576</memory>
+  <vcpu placement='static'>1</vcpu>
+  <os firmware='efi'>
+    <type arch='x86_64' machine='pc-q35-10.0'>hvm</type>
+  </os>
+  <features>
+    <acpi/>
+  </features>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <controller type='usb' model='none'/>
+    <memballoon model='none'/>
+  </devices>
+  <launchSecurity type='sev'>
+    <policy>0x30000</policy>
+  </launchSecurity>
+</domain>
diff --git a/tests/qemuxmlconftest.c b/tests/qemuxmlconftest.c
index 171a6f1c78..a7955b7aff 100644
--- a/tests/qemuxmlconftest.c
+++ b/tests/qemuxmlconftest.c
@@ -1477,6 +1477,24 @@ mymain(void)
     DO_TEST_CAPS_ARCH_LATEST_ABI_UPDATE("firmware-auto-efi-format-loader-raw", "aarch64");
     DO_TEST_CAPS_LATEST("firmware-auto-efi-format-mismatch");
 
+    /* This test passes, but the outcome is not the desired one: the
+     * generic edk2 build gets selected instead of the AMD SEV one */
+    DO_TEST_CAPS_ARCH_LATEST_FULL("firmware-auto-efi-sev", "x86_64",
+                                  ARG_CAPS_VARIANT, "+amdsev",
+                                  ARG_END);
+
+    DO_TEST_CAPS_ARCH_LATEST_FULL("firmware-auto-efi-sev-snp", "x86_64",
+                                  ARG_FLAGS, FLAG_EXPECT_FAILURE,
+                                  ARG_CAPS_VARIANT, "+amdsev",
+                                  ARG_END);
+
+    /* Use of stateful firmware for SEV is uncommon, since it
+     * conflicts with boot measurements, but it's still possible for
+     * the user to explicitly request it */
+    DO_TEST_CAPS_ARCH_LATEST_FULL("firmware-auto-efi-sev-stateful", "x86_64",
+                                  ARG_CAPS_VARIANT, "+amdsev",
+                                  ARG_END);
+
     DO_TEST_CAPS_LATEST("clock-utc");
     DO_TEST_CAPS_LATEST("clock-localtime");
     DO_TEST_CAPS_LATEST("clock-localtime-basis-localtime");