Merge tag 'pull-vfio-20250311' of https://github.com/legoater/qemu into staging

vfio queue:

* Fixed endianness of VFIO device state packets
* Improved IGD passthrough support with legacy mode
* Improved build
* Added support for old AMD GPUs (x550)
* Updated property documentation

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# gpg:                using RSA key A0F66548F04895EBFE6B0B6051A343C7CFFBECA1
# gpg: Good signature from "Cédric Le Goater <clg@redhat.com>" [full]
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* tag 'pull-vfio-20250311' of https://github.com/legoater/qemu: (21 commits)
  vfio/pci: Drop debug commentary from x-device-dirty-page-tracking
  vfio/pci-quirks: Exclude non-ioport BAR from ATI quirk
  hw/vfio: Compile display.c once
  hw/vfio: Compile iommufd.c once
  hw/vfio: Compile more objects once
  hw/vfio: Compile some common objects once
  hw/vfio/common: Get target page size using runtime helpers
  hw/vfio/common: Include missing 'system/tcg.h' header
  hw/vfio/spapr: Do not include <linux/kvm.h>
  system: Declare qemu_[min/max]rampagesize() in 'system/hostmem.h'
  vfio/migration: Use BE byte order for device state wire packets
  vfio/igd: Fix broken KVMGT OpRegion support
  vfio/igd: Introduce x-igd-lpc option for LPC bridge ID quirk
  vfio/igd: Handle x-igd-opregion option in config quirk
  vfio/igd: Decouple common quirks from legacy mode
  vfio/igd: Refactor vfio_probe_igd_bar4_quirk into pci config quirk
  vfio/pci: Add placeholder for device-specific config space quirks
  vfio/igd: Move LPC bridge initialization to a separate function
  vfio/igd: Consolidate OpRegion initialization into a single function
  vfio/igd: Do not include GTT stolen size in etc/igd-bdsm-size
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 6 insertions, 47 deletions

diff --git a/hw/vfio/pci-quirks.c b/hw/vfio/pci-quirks.c
index c53591fe2b..3f002252ac 100644
--- a/hw/vfio/pci-quirks.c
+++ b/hw/vfio/pci-quirks.c
@@ -403,7 +403,7 @@ static void vfio_probe_ati_bar4_quirk(VFIOPCIDevice *vdev, int nr)
 
     /* This windows doesn't seem to be used except by legacy VGA code */
     if (!vfio_pci_is(vdev, PCI_VENDOR_ID_ATI, PCI_ANY_ID) ||
-        !vdev->vga || nr != 4) {
+        !vdev->vga || nr != 4 || !vdev->bars[4].ioport) {
         return;
     }
 
@@ -1114,59 +1114,19 @@ static void vfio_probe_rtl8168_bar2_quirk(VFIOPCIDevice *vdev, int nr)
     trace_vfio_quirk_rtl8168_probe(vdev->vbasedev.name);
 }
 
-#define IGD_ASLS 0xfc /* ASL Storage Register */
-
 /*
- * The OpRegion includes the Video BIOS Table, which seems important for
- * telling the driver what sort of outputs it has.  Without this, the device
- * may work in the guest, but we may not get output.  This also requires BIOS
- * support to reserve and populate a section of guest memory sufficient for
- * the table and to write the base address of that memory to the ASLS register
- * of the IGD device.
+ * Common quirk probe entry points.
  */
-bool vfio_pci_igd_opregion_init(VFIOPCIDevice *vdev,
-                                struct vfio_region_info *info, Error **errp)
+bool vfio_config_quirk_setup(VFIOPCIDevice *vdev, Error **errp)
 {
-    int ret;
-
-    vdev->igd_opregion = g_malloc0(info->size);
-    ret = pread(vdev->vbasedev.fd, vdev->igd_opregion,
-                info->size, info->offset);
-    if (ret != info->size) {
-        error_setg(errp, "failed to read IGD OpRegion");
-        g_free(vdev->igd_opregion);
-        vdev->igd_opregion = NULL;
+#ifdef CONFIG_VFIO_IGD
+    if (!vfio_probe_igd_config_quirk(vdev, errp)) {
         return false;
     }
-
-    /*
-     * Provide fw_cfg with a copy of the OpRegion which the VM firmware is to
-     * allocate 32bit reserved memory for, copy these contents into, and write
-     * the reserved memory base address to the device ASLS register at 0xFC.
-     * Alignment of this reserved region seems flexible, but using a 4k page
-     * alignment seems to work well.  This interface assumes a single IGD
-     * device, which may be at VM address 00:02.0 in legacy mode or another
-     * address in UPT mode.
-     *
-     * NB, there may be future use cases discovered where the VM should have
-     * direct interaction with the host OpRegion, in which case the write to
-     * the ASLS register would trigger MemoryRegion setup to enable that.
-     */
-    fw_cfg_add_file(fw_cfg_find(), "etc/igd-opregion",
-                    vdev->igd_opregion, info->size);
-
-    trace_vfio_pci_igd_opregion_enabled(vdev->vbasedev.name);
-
-    pci_set_long(vdev->pdev.config + IGD_ASLS, 0);
-    pci_set_long(vdev->pdev.wmask + IGD_ASLS, ~0);
-    pci_set_long(vdev->emulated_config_bits + IGD_ASLS, ~0);
-
+#endif
     return true;
 }
 
-/*
- * Common quirk probe entry points.
- */
 void vfio_vga_quirk_setup(VFIOPCIDevice *vdev)
 {
     vfio_vga_probe_ati_3c3_quirk(vdev);
@@ -1215,7 +1175,6 @@ void vfio_bar_quirk_setup(VFIOPCIDevice *vdev, int nr)
     vfio_probe_rtl8168_bar2_quirk(vdev, nr);
 #ifdef CONFIG_VFIO_IGD
     vfio_probe_igd_bar0_quirk(vdev, nr);
-    vfio_probe_igd_bar4_quirk(vdev, nr);
 #endif
 }