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| author | Olaf Hering <olaf@aepfle.de> | 2016-10-21 14:37:07 +0200 |
|---|---|---|
| committer | Stefano Stabellini <sstabellini@kernel.org> | 2016-10-21 12:11:38 -0700 |
| commit | 35132016dc1c27de2b1354b161df6cc22f3ac5bf (patch) | |
| tree | a0cf4005a503f0c8120d645cc028ec74f1a8fc5c /hw/i386 | |
| parent | 78f66897ddf58d1ffe5e0b95f7c1a1dad103a8da (diff) | |
| download | qemu-35132016dc1c27de2b1354b161df6cc22f3ac5bf.zip qemu-35132016dc1c27de2b1354b161df6cc22f3ac5bf.tar.gz qemu-35132016dc1c27de2b1354b161df6cc22f3ac5bf.tar.bz2 | |
xen_platform: SUSE xenlinux unplug for emulated PCI
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.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
Diffstat (limited to 'hw/i386')
| -rw-r--r-- | hw/i386/xen/xen_platform.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/hw/i386/xen/xen_platform.c b/hw/i386/xen/xen_platform.c index 91d8a7a..2e1e543 100644 --- a/hw/i386/xen/xen_platform.c +++ b/hw/i386/xen/xen_platform.c @@ -311,13 +311,38 @@ static void xen_platform_ioport_writeb(void *opaque, hwaddr addr, uint64_t val, unsigned int size) { PCIXenPlatformState *s = opaque; + PCIDevice *pci_dev = PCI_DEVICE(s); switch (addr) { case 0: /* Platform flags */ platform_fixed_ioport_writeb(opaque, 0, (uint32_t)val); break; + case 4: + if (val == 1) { + /* + * 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. + */ + pci_unplug_disks(pci_dev->bus); + pci_unplug_nics(pci_dev->bus); + } + break; case 8: - log_writeb(s, (uint32_t)val); + switch (val) { + case 1: + pci_unplug_disks(pci_dev->bus); + break; + case 2: + pci_unplug_nics(pci_dev->bus); + break; + default: + log_writeb(s, (uint32_t)val); + break; + } break; default: break; |