[libvirt PATCH v3 13/13] qemu: format sev-guest.kernel-hashes property

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Set the kernel-hashes property on the sev-guest object if
the config asked for it explicitly. While QEMU machine
types currently default to having this setting off, it
is not guaranteed to remain this way.

Signed-off-by: Daniel P. Berrangé <berrange@xxxxxxxxxx>
---
 src/qemu/qemu_command.c                       |  1 +
 src/qemu/qemu_validate.c                      |  7 ++++
 ...unch-security-sev-direct.x86_64-6.2.0.args | 40 +++++++++++++++++++
 .../launch-security-sev-direct.xml            | 39 ++++++++++++++++++
 tests/qemuxml2argvtest.c                      |  1 +
 5 files changed, 88 insertions(+)
 create mode 100644 tests/qemuxml2argvdata/launch-security-sev-direct.x86_64-6.2.0.args
 create mode 100644 tests/qemuxml2argvdata/launch-security-sev-direct.xml

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 613f7a5d2a..dfbf4973f5 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -9894,6 +9894,7 @@ qemuBuildSEVCommandLine(virDomainObj *vm, virCommand *cmd,
                                      "u:policy", sev->policy,
                                      "S:dh-cert-file", dhpath,
                                      "S:session-file", sessionpath,
+                                     "T:kernel-hashes", sev->kernel_hashes,
                                      NULL) < 0)
         return -1;
 
diff --git a/src/qemu/qemu_validate.c b/src/qemu/qemu_validate.c
index 29b01495ad..c0dc1f7b53 100644
--- a/src/qemu/qemu_validate.c
+++ b/src/qemu/qemu_validate.c
@@ -1200,6 +1200,13 @@ qemuValidateDomainDef(const virDomainDef *def,
                                  "this QEMU binary"));
                 return -1;
             }
+
+            if (def->sec->data.sev.kernel_hashes == VIR_TRISTATE_BOOL_YES &&
+                !virQEMUCapsGet(qemuCaps, QEMU_CAPS_SEV_GUEST_KERNEL_HASHES)) {
+                virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                               _("SEV measured direct kernel boot is not supported with this QEMU binary"));
+                return -1;
+            }
             break;
         case VIR_DOMAIN_LAUNCH_SECURITY_PV:
             if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_MACHINE_CONFIDENTAL_GUEST_SUPPORT) ||
diff --git a/tests/qemuxml2argvdata/launch-security-sev-direct.x86_64-6.2.0.args b/tests/qemuxml2argvdata/launch-security-sev-direct.x86_64-6.2.0.args
new file mode 100644
index 0000000000..0062faa06c
--- /dev/null
+++ b/tests/qemuxml2argvdata/launch-security-sev-direct.x86_64-6.2.0.args
@@ -0,0 +1,40 @@
+LC_ALL=C \
+PATH=/bin \
+HOME=/tmp/lib/domain--1-QEMUGuest1 \
+USER=test \
+LOGNAME=test \
+XDG_DATA_HOME=/tmp/lib/domain--1-QEMUGuest1/.local/share \
+XDG_CACHE_HOME=/tmp/lib/domain--1-QEMUGuest1/.cache \
+XDG_CONFIG_HOME=/tmp/lib/domain--1-QEMUGuest1/.config \
+/usr/bin/qemu-system-x86_64 \
+-name guest=QEMUGuest1,debug-threads=on \
+-S \
+-object '{"qom-type":"secret","id":"masterKey0","format":"raw","file":"/tmp/lib/domain--1-QEMUGuest1/master-key.aes"}' \
+-machine pc-i440fx-6.2,usb=off,dump-guest-core=off,confidential-guest-support=lsec0,memory-backend=pc.ram \
+-accel kvm \
+-cpu qemu64 \
+-m 214 \
+-object '{"qom-type":"memory-backend-ram","id":"pc.ram","size":224395264}' \
+-overcommit mem-lock=off \
+-smp 1,sockets=1,cores=1,threads=1 \
+-uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 \
+-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 \
+-no-acpi \
+-boot strict=on \
+-kernel /vmlinuz \
+-initrd /initrd \
+-append runme \
+-device '{"driver":"piix3-usb-uhci","id":"usb","bus":"pci.0","addr":"0x1.0x2"}' \
+-blockdev '{"driver":"host_device","filename":"/dev/HostVG/QEMUGuest1","node-name":"libvirt-1-storage","auto-read-only":true,"discard":"unmap"}' \
+-blockdev '{"node-name":"libvirt-1-format","read-only":false,"driver":"raw","file":"libvirt-1-storage"}' \
+-device '{"driver":"ide-hd","bus":"ide.0","unit":0,"drive":"libvirt-1-format","id":"ide0-0-0","bootindex":1}' \
+-audiodev '{"id":"audio1","driver":"none"}' \
+-object '{"qom-type":"sev-guest","id":"lsec0","cbitpos":47,"reduced-phys-bits":1,"policy":1,"dh-cert-file":"/tmp/lib/domain--1-QEMUGuest1/dh_cert.base64","session-file":"/tmp/lib/domain--1-QEMUGuest1/session.base64","kernel-hashes":true}' \
+-sandbox on,obsolete=deny,elevateprivileges=deny,spawn=deny,resourcecontrol=deny \
+-msg timestamp=on
diff --git a/tests/qemuxml2argvdata/launch-security-sev-direct.xml b/tests/qemuxml2argvdata/launch-security-sev-direct.xml
new file mode 100644
index 0000000000..80ce6412dd
--- /dev/null
+++ b/tests/qemuxml2argvdata/launch-security-sev-direct.xml
@@ -0,0 +1,39 @@
+<domain type='kvm'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory unit='KiB'>219100</memory>
+  <currentMemory unit='KiB'>219100</currentMemory>
+  <vcpu placement='static'>1</vcpu>
+  <os>
+    <type arch='x86_64' machine='pc'>hvm</type>
+    <kernel>/vmlinuz</kernel>
+    <initrd>/initrd</initrd>
+    <cmdline>runme</cmdline>
+  </os>
+  <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>
+    <disk type='block' device='disk'>
+      <driver name='qemu' type='raw'/>
+      <source dev='/dev/HostVG/QEMUGuest1'/>
+      <target dev='hda' bus='ide'/>
+      <address type='drive' controller='0' bus='0' target='0' unit='0'/>
+    </disk>
+    <controller type='usb' index='0'/>
+    <controller type='ide' index='0'/>
+    <controller type='pci' index='0' model='pci-root'/>
+    <input type='mouse' bus='ps2'/>
+    <input type='keyboard' bus='ps2'/>
+    <memballoon model='none'/>
+  </devices>
+  <launchSecurity type='sev' kernelHashes='yes'>
+    <cbitpos>47</cbitpos>
+    <reducedPhysBits>1</reducedPhysBits>
+    <policy>0x0001</policy>
+    <dhCert>AQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAAAQAAAAAOAAA</dhCert>
+    <session>IHAVENOIDEABUTJUSTPROVIDINGASTRING</session>
+  </launchSecurity>
+</domain>
diff --git a/tests/qemuxml2argvtest.c b/tests/qemuxml2argvtest.c
index 615f45376c..e1ecb749ed 100644
--- a/tests/qemuxml2argvtest.c
+++ b/tests/qemuxml2argvtest.c
@@ -3423,6 +3423,7 @@ mymain(void)
     DO_TEST_CAPS_VER("launch-security-sev", "2.12.0");
     DO_TEST_CAPS_VER("launch-security-sev", "6.0.0");
     DO_TEST_CAPS_VER("launch-security-sev-missing-platform-info", "2.12.0");
+    DO_TEST_CAPS_VER("launch-security-sev-direct", "6.2.0");
 
     DO_TEST_CAPS_ARCH_LATEST("launch-security-s390-pv", "s390x");
 
-- 
2.33.1




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