Merge tag 'pull-xen-20220609' of https://xenbits.xen.org/git-http/people/aperard/qemu-dm into staging

Xen patches

- PIIX3-IDE Xen cleanup

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* tag 'pull-xen-20220609' of https://xenbits.xen.org/git-http/people/aperard/qemu-dm:
  include/hw/ide: Unexport pci_piix3_xen_ide_unplug()
  hw/ide/piix: Add some documentation to pci_piix3_xen_ide_unplug()
  hw/ide/piix: Remove redundant "piix3-ide-xen" device class

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

4 files changed, 48 insertions, 48 deletions

diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 578e537b35..0e45521e74 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -246,8 +246,7 @@ static void pc_init1(MachineState *machine,
     if (pcmc->pci_enabled) {
         PCIDevice *dev;
 
-        dev = pci_create_simple(pci_bus, piix3_devfn + 1,
-                                xen_enabled() ? "piix3-ide-xen" : "piix3-ide");
+        dev = pci_create_simple(pci_bus, piix3_devfn + 1, "piix3-ide");
         pci_ide_create_devs(dev);
         idebus[0] = qdev_get_child_bus(&dev->qdev, "ide.0");
         idebus[1] = qdev_get_child_bus(&dev->qdev, "ide.1");
diff --git a/hw/i386/xen/xen_platform.c b/hw/i386/xen/xen_platform.c
index 72028449ba..a64265cca0 100644
--- a/hw/i386/xen/xen_platform.c
+++ b/hw/i386/xen/xen_platform.c
@@ -26,6 +26,7 @@
 #include "qemu/osdep.h"
 #include "qapi/error.h"
 #include "hw/ide.h"
+#include "hw/ide/pci.h"
 #include "hw/pci/pci.h"
 #include "hw/xen/xen_common.h"
 #include "migration/vmstate.h"
@@ -134,6 +135,51 @@ static void pci_unplug_nics(PCIBus *bus)
     pci_for_each_device(bus, 0, unplug_nic, NULL);
 }
 
+/*
+ * The Xen HVM unplug protocol [1] specifies a mechanism to allow guests to
+ * request unplug of 'aux' disks (which is stated to mean all IDE disks,
+ * except the primary master).
+ *
+ * NOTE: The semantics of what happens if unplug of all disks and 'aux' disks
+ *       is simultaneously requested is not clear. The implementation assumes
+ *       that an 'all' request overrides an 'aux' request.
+ *
+ * [1] https://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=docs/misc/hvm-emulated-unplug.pandoc
+ */
+static void pci_xen_ide_unplug(DeviceState *dev, bool aux)
+{
+    PCIIDEState *pci_ide;
+    int i;
+    IDEDevice *idedev;
+    IDEBus *idebus;
+    BlockBackend *blk;
+
+    pci_ide = PCI_IDE(dev);
+
+    for (i = aux ? 1 : 0; i < 4; i++) {
+        idebus = &pci_ide->bus[i / 2];
+        blk = idebus->ifs[i % 2].blk;
+
+        if (blk && idebus->ifs[i % 2].drive_kind != IDE_CD) {
+            if (!(i % 2)) {
+                idedev = idebus->master;
+            } else {
+                idedev = idebus->slave;
+            }
+
+            blk_drain(blk);
+            blk_flush(blk);
+
+            blk_detach_dev(blk, DEVICE(idedev));
+            idebus->ifs[i % 2].blk = NULL;
+            idedev->conf.blk = NULL;
+            monitor_remove_blk(blk);
+            blk_unref(blk);
+        }
+    }
+    qdev_reset_all(dev);
+}
+
 static void unplug_disks(PCIBus *b, PCIDevice *d, void *opaque)
 {
     uint32_t flags = *(uint32_t *)opaque;
@@ -147,7 +193,7 @@ static void unplug_disks(PCIBus *b, PCIDevice *d, void *opaque)
 
     switch (pci_get_word(d->config + PCI_CLASS_DEVICE)) {
     case PCI_CLASS_STORAGE_IDE:
-        pci_piix3_xen_ide_unplug(DEVICE(d), aux);
+        pci_xen_ide_unplug(DEVICE(d), aux);
         break;
 
     case PCI_CLASS_STORAGE_SCSI:
diff --git a/hw/ide/piix.c b/hw/ide/piix.c
index ce89fd0aa3..9a9b28078e 100644
--- a/hw/ide/piix.c
+++ b/hw/ide/piix.c
@@ -173,41 +173,6 @@ static void pci_piix_ide_realize(PCIDevice *dev, Error **errp)
     }
 }
 
-int pci_piix3_xen_ide_unplug(DeviceState *dev, bool aux)
-{
-    PCIIDEState *pci_ide;
-    int i;
-    IDEDevice *idedev;
-    IDEBus *idebus;
-    BlockBackend *blk;
-
-    pci_ide = PCI_IDE(dev);
-
-    for (i = aux ? 1 : 0; i < 4; i++) {
-        idebus = &pci_ide->bus[i / 2];
-        blk = idebus->ifs[i % 2].blk;
-
-        if (blk && idebus->ifs[i % 2].drive_kind != IDE_CD) {
-            if (!(i % 2)) {
-                idedev = idebus->master;
-            } else {
-                idedev = idebus->slave;
-            }
-
-            blk_drain(blk);
-            blk_flush(blk);
-
-            blk_detach_dev(blk, DEVICE(idedev));
-            idebus->ifs[i % 2].blk = NULL;
-            idedev->conf.blk = NULL;
-            monitor_remove_blk(blk);
-            blk_unref(blk);
-        }
-    }
-    qdev_reset_all(dev);
-    return 0;
-}
-
 static void pci_piix_ide_exitfn(PCIDevice *dev)
 {
     PCIIDEState *d = PCI_IDE(dev);
@@ -241,12 +206,6 @@ static const TypeInfo piix3_ide_info = {
     .class_init    = piix3_ide_class_init,
 };
 
-static const TypeInfo piix3_ide_xen_info = {
-    .name          = "piix3-ide-xen",
-    .parent        = TYPE_PCI_IDE,
-    .class_init    = piix3_ide_class_init,
-};
-
 /* NOTE: for the PIIX4, the IRQs and IOports are hardcoded */
 static void piix4_ide_class_init(ObjectClass *klass, void *data)
 {
@@ -272,7 +231,6 @@ static const TypeInfo piix4_ide_info = {
 static void piix_ide_register_types(void)
 {
     type_register_static(&piix3_ide_info);
-    type_register_static(&piix3_ide_xen_info);
     type_register_static(&piix4_ide_info);
 }
 
diff --git a/include/hw/ide.h b/include/hw/ide.h
index c5ce5da4f4..60f1f4f714 100644
--- a/include/hw/ide.h
+++ b/include/hw/ide.h
@@ -8,9 +8,6 @@
 ISADevice *isa_ide_init(ISABus *bus, int iobase, int iobase2, int isairq,
                         DriveInfo *hd0, DriveInfo *hd1);
 
-/* ide-pci.c */
-int pci_piix3_xen_ide_unplug(DeviceState *dev, bool aux);
-
 /* ide-mmio.c */
 void mmio_ide_init_drives(DeviceState *dev, DriveInfo *hd0, DriveInfo *hd1);