The IGVM library allows Independent Guest Virtual Machine files to be
parsed and processed. IGVM files are used to configure guest memory
layout, initial processor state and other configuration pertaining to
secure virtual machines.

This adds the --enable-igvm configure option, enabled by default, which
attempts to locate and link against the IGVM library via pkgconfig and
sets CONFIG_IGVM if found.

The library is added to the system_ss target in backends/meson.build
where the IGVM parsing will be performed by the ConfidentialGuestSupport
object.

Signed-off-by: Roy Hopkins <roy.hopkins@suse.com>
---
 meson.build                   | 8 ++++++++
 backends/meson.build          | 3 +++
 meson_options.txt             | 2 ++
 scripts/meson-buildoptions.sh | 3 +++
 4 files changed, 16 insertions(+)

diff --git a/meson.build b/meson.build
index 97e00d6f59..4252f1cf97 100644
--- a/meson.build
+++ b/meson.build
@@ -1251,6 +1251,12 @@ if host_os == 'linux' and (have_system or have_tools)
                        method: 'pkg-config',
                        required: get_option('libudev'))
 endif
+igvm = not_found
+if not get_option('igvm').auto() or have_system
+  igvm = dependency('igvm',
+                       method: 'pkg-config',
+                       required: get_option('igvm'))
+endif
 
 mpathlibs = [libudev]
 mpathpersist = not_found
@@ -2368,6 +2374,7 @@ config_host_data.set('CONFIG_CFI', get_option('cfi'))
 config_host_data.set('CONFIG_SELINUX', selinux.found())
 config_host_data.set('CONFIG_XEN_BACKEND', xen.found())
 config_host_data.set('CONFIG_LIBDW', libdw.found())
+config_host_data.set('CONFIG_IGVM', igvm.found())
 if xen.found()
   # protect from xen.version() having less than three components
   xen_version = xen.version().split('.') + ['0', '0']
@@ -4460,6 +4467,7 @@ summary_info += {'seccomp support':   seccomp}
 summary_info += {'GlusterFS support': glusterfs}
 summary_info += {'hv-balloon support': hv_balloon}
 summary_info += {'TPM support':       have_tpm}
+summary_info += {'IGVM support':      igvm}
 summary_info += {'libssh support':    libssh}
 summary_info += {'lzo support':       lzo}
 summary_info += {'snappy support':    snappy}
diff --git a/backends/meson.build b/backends/meson.build
index 8b2b111497..d550ac19f7 100644
--- a/backends/meson.build
+++ b/backends/meson.build
@@ -30,5 +30,8 @@ if have_vhost_user_crypto
 endif
 system_ss.add(when: gio, if_true: files('dbus-vmstate.c'))
 system_ss.add(when: 'CONFIG_SGX', if_true: files('hostmem-epc.c'))
+if igvm.found()
+  system_ss.add(igvm)
+endif
 
 subdir('tpm')
diff --git a/meson_options.txt b/meson_options.txt
index 7a79dd8970..9ceacca4ed 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -111,6 +111,8 @@ option('dbus_display', type: 'feature', value: 'auto',
        description: '-display dbus support')
 option('tpm', type : 'feature', value : 'auto',
        description: 'TPM support')
+option('igvm', type: 'feature', value: 'auto',
+       description: 'Independent Guest Virtual Machine (IGVM) file support')
 
 # Do not enable it by default even for Mingw32, because it doesn't
 # work on Wine.
diff --git a/scripts/meson-buildoptions.sh b/scripts/meson-buildoptions.sh
index 58d49a447d..d7d4b033e2 100644
--- a/scripts/meson-buildoptions.sh
+++ b/scripts/meson-buildoptions.sh
@@ -127,6 +127,7 @@ meson_options_help() {
   printf "%s\n" '  hv-balloon      hv-balloon driver (requires Glib 2.68+ GTree API)'
   printf "%s\n" '  hvf             HVF acceleration support'
   printf "%s\n" '  iconv           Font glyph conversion support'
+  printf "%s\n" '  igvm            IGVM file support'
   printf "%s\n" '  jack            JACK sound support'
   printf "%s\n" '  keyring         Linux keyring support'
   printf "%s\n" '  kvm             KVM acceleration support'
@@ -344,6 +345,8 @@ _meson_option_parse() {
     --iasl=*) quote_sh "-Diasl=$2" ;;
     --enable-iconv) printf "%s" -Diconv=enabled ;;
     --disable-iconv) printf "%s" -Diconv=disabled ;;
+    --enable-igvm) printf "%s" -Digvm=enabled ;;
+    --disable-igvm) printf "%s" -Digvm=disabled ;;
     --includedir=*) quote_sh "-Dincludedir=$2" ;;
     --enable-install-blobs) printf "%s" -Dinstall_blobs=true ;;
     --disable-install-blobs) printf "%s" -Dinstall_blobs=false ;;
-- 
2.43.0