From: Olaf Hering <oher...@suse.de>
Implement SUSE specific unplug protocol for emulated PCI devices
in PVonHVM guests. Its a simple 'outl(1, (ioaddr + 4));'.
This protocol was implemented and used since Xen 3.0.4.
It is used in all SUSE/SLES/openSUSE releases up to SLES11SP3 and
openSUSE 12.3.
In addition old (pre-2011) VMDP versions are handled as well.
Upstream commit 35132016dc1c27de2b1354b161df6cc22f3ac5bf
Signed-off-by: Olaf Hering <oher...@suse.de>
---
hw/xen_platform.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)
diff --git a/hw/xen_platform.c b/hw/xen_platform.c
index 0a94e0d..3c2fc0e 100644
--- a/hw/xen_platform.c
+++ b/hw/xen_platform.c
@@ -337,9 +337,42 @@ static void xen_platform_ioport_writeb(void *opaque,
uint32_t addr, uint32_t val
}
}
+static void suse_platform_ioport_writel(void *opaque, uint32_t addr, uint32_t
val)
+{
+ addr &= 0x0f;
+ switch (addr) {
+ case 4:
+ /*
+ * SUSE unplug for Xenlinux
+ * xen-kmp used this since xen-3.0.4, instead the official protocol
+ * from xen-3.3+ It did an unconditional "outl(1, (ioaddr + 4));"
+ * Pre VMDP 1.7 used 4 and 8 depending on how VMDP was configured.
+ * If VMDP was to control both disk and LAN it would use 4.
+ * If it controlled just disk or just LAN, it would use 8 below.
+ * */
+ ide_unplug_harddisks();
+ pci_unplug_scsi();
+ pci_unplug_netifs();
+ net_tap_shutdown_all();
+ break;
+ case 8:
+ if (val ==1 ) {
+ ide_unplug_harddisks();
+ pci_unplug_scsi();
+ } else if (val == 2) {
+ pci_unplug_netifs();
+ net_tap_shutdown_all();
+ }
+ break;
+ default:
+ break;
+ }
+}
+
static void platform_ioport_map(PCIDevice *pci_dev, int region_num, uint32_t
addr, uint32_t size, int type)
{
PCIXenPlatformState *d = (PCIXenPlatformState *)pci_dev;
+ register_ioport_write(addr, 16, 4, suse_platform_ioport_writel, d);
register_ioport_write(addr, size, 1, xen_platform_ioport_writeb, d);
register_ioport_read(addr, size, 1, xen_platform_ioport_readb, d);
}
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