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include/hw/ide: Unexport pci_piix3_xen_ide_unplug()

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This function was declared in a generic and public header, implemented
in a device-specific source file but only used in xen_platform. Given its
'aux' parameter, this function is more xen-specific than piix-specific.
Also, the hardcoded magic constants seem to be generic and related to
PCIIDEState and IDEBus rather than piix.

Therefore, move this function to xen_platform, unexport it, and drop the
"piix3" in the function name as well.

Signed-off-by: Bernhard Beschow <shentey@gmail.com>
Reviewed-by: Paul Durrant <paul@xen.org>
Acked-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220513180957.90514-4-shentey@gmail.com>
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
This commit is contained in:
Bernhard Beschow 2022-05-13 20:09:57 +02:00 committed by Anthony PERARD
parent 3690241746
commit 6a8a8b62bd
3 changed files with 47 additions and 50 deletions
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48
hw/i386/xen/xen_platform.c
View File

@ -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:

46
hw/ide/piix.c
View File

@ -173,52 +173,6 @@ static void pci_piix_ide_realize(PCIDevice *dev, Error **errp)
}
}
/*
* 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
*/
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);

3
include/hw/ide.h
View File

@ -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);