PVG is not cross-architecture; the PVG guest drivers with x86-64 macOS do not give
useful results with the aarch64 macOS host PVG framework, and vice versa.
To express this repurpose CONFIG_MAC_PVG, making it true only if the target has
the same architecture as the host.  Furthermore, remove apple-gfx.m unless
one of the devices is actually present.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 meson.build            | 6 ++++++
 Kconfig.host           | 3 +++
 hw/display/Kconfig     | 4 ----
 hw/display/meson.build | 9 +++------
 4 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/meson.build b/meson.build
index 0ee79c664d3..ad2c6b61930 100644
--- a/meson.build
+++ b/meson.build
@@ -3367,6 +3367,12 @@ foreach target : target_dirs
     target_kconfig += 'CONFIG_' + config_target['TARGET_ARCH'].to_upper() + '=y'
     target_kconfig += 'CONFIG_TARGET_BIG_ENDIAN=' + config_target['TARGET_BIG_ENDIAN']
 
+    # PVG is not cross-architecture.  Use accelerator_targets as a proxy to
+    # figure out which target can support PVG on this host
+    if pvg.found() and target in accelerator_targets.get('CONFIG_HVF', [])
+      target_kconfig += 'CONFIG_MAC_PVG=y'
+    endif
+
     config_input = meson.get_external_property(target, 'default')
     config_devices_mak = target + '-config-devices.mak'
     config_devices_mak = configure_file(
diff --git a/Kconfig.host b/Kconfig.host
index 842cbe0d6c5..933425c74b4 100644
--- a/Kconfig.host
+++ b/Kconfig.host
@@ -61,3 +61,6 @@ config HV_BALLOON_POSSIBLE
 
 config HAVE_RUST
     bool
+
+config MAC_PVG
+    bool
diff --git a/hw/display/Kconfig b/hw/display/Kconfig
index 2b53dfd7d26..1e95ab28ef4 100644
--- a/hw/display/Kconfig
+++ b/hw/display/Kconfig
@@ -141,10 +141,6 @@ config XLNX_DISPLAYPORT
 config DM163
     bool
 
-config MAC_PVG
-    bool
-    default y
-
 config MAC_PVG_MMIO
     bool
     depends on MAC_PVG && AARCH64
diff --git a/hw/display/meson.build b/hw/display/meson.build
index 94f4f05d36f..b9bdf219103 100644
--- a/hw/display/meson.build
+++ b/hw/display/meson.build
@@ -61,12 +61,9 @@ system_ss.add(when: 'CONFIG_ARTIST', if_true: files('artist.c'))
 
 system_ss.add(when: 'CONFIG_ATI_VGA', if_true: [files('ati.c', 'ati_2d.c', 'ati_dbg.c'), pixman])
 
-if host_os == 'darwin'
-  system_ss.add(when: 'CONFIG_MAC_PVG',         if_true: [files('apple-gfx.m'), pvg, metal])
-  system_ss.add(when: 'CONFIG_MAC_PVG_PCI',     if_true: [files('apple-gfx-pci.m'), pvg, metal])
-  if cpu == 'aarch64'
-    system_ss.add(when: 'CONFIG_MAC_PVG_MMIO',  if_true: [files('apple-gfx-mmio.m'), pvg, metal])
-  endif
+if pvg.found()
+  system_ss.add(when: 'CONFIG_MAC_PVG_PCI',     if_true: [files('apple-gfx.m', 'apple-gfx-pci.m'), pvg, metal])
+  system_ss.add(when: 'CONFIG_MAC_PVG_MMIO',    if_true: [files('apple-gfx.m', 'apple-gfx-mmio.m'), pvg, metal])
 endif
 
 if config_all_devices.has_key('CONFIG_VIRTIO_GPU')
-- 
2.48.1