qemu: Automatically create swtpm device

- Create device if QEMUTPM is set
- Recommend swtpm packages
- Add swtpm test deps

See: https://progress.opensuse.org/issues/101015

backend/qemu.pm

@@ -831,7 +831,11 @@ sub start_qemu {
 
         if ($vars->{QEMUTPM}) {
             my $tpmn = $vars->{QEMUTPM} eq 'instance' ? $vars->{WORKER_INSTANCE} : $vars->{QEMUTPM};
-            sp('chardev', "socket,id=chrtpm,path=/tmp/mytpm$tpmn/swtpm-sock");
+            my $vmpath = "/tmp/mytpm$tpmn";
+            mkdir $vmpath unless -d $vmpath;
+            my $vmsock = "$vmpath/swtpm-sock";
+            runcmd('swtpm', 'socket', '--tpm2', '--tpmstate', "dir=$vmpath", '--ctrl', "type=unixio,path=$vmsock", '--log', 'level-20', '-d') unless -e $vmsock;
+            sp('chardev', "socket,id=chrtpm,path=$vmsock");
             sp('tpmdev', 'emulator,id=tpm0,chardev=chrtpm');
             if ($arch eq 'aarch64') {
                 sp('device', 'tpm-tis-device,tpmdev=tpm0');

dist/rpm/os-autoinst.spec

@@ -131,6 +131,17 @@ Requires:       qemu-tools
 
 %description qemu-kvm
 
+%package swtpm
+Summary:        Convenience package providing os-autoinst+swtpm
+Group:          Development/Tools/Other
+Requires:       os-autoinst
+Requires:       libtpms0
+Requires:       swtpm
+
+%description swtpm
+Convenience package providing os-autoinst and swtpm dependencies.
+%endif
+
 %package qemu-x86
 Summary:        Convenience package providing os-autoinst+qemu-x86
 Group:          Development/Tools/Other

t/18-qemu-options.t

@@ -112,12 +112,14 @@ subtest qemu_huge_pages_option => sub {
 #       of QEMU here.
 subtest qemu_tpm_option => sub {
     # call isotovideo with QEMUTPM=instance
+    path('/tmp/mytpm3/swtpm-sock')->touch;
     run_isotovideo(QEMU_ONLY_EXEC => 1, QEMUTPM => 'instance');
     like($log, qr|-chardev socket,id=chrtpm,path=/tmp/mytpm3/swtpm-sock|, '-chardev socket option added (instance)');
     like($log, qr|-tpmdev emulator,id=tpm0,chardev=chrtpm|, '-tpmdev emulator option added');
     like($log, qr|-device tpm-tis,tpmdev=tpm0|, '-device tpm-tis option added');
 
     # call isotovideo with QEMUTPM=2
+    path('/tmp/mytpm2/swtpm-sock')->touch;
     run_isotovideo(QEMU_ONLY_EXEC => 1, QEMUTPM => '2');
     like($log, qr|-chardev socket,id=chrtpm,path=/tmp/mytpm2/swtpm-sock|, '-chardev socket option added (2)');