kernel_optimize_test/arch/x86/pci
Stefano Stabellini af42b8d12f xen: fix MSI setup and teardown for PV on HVM guests
When remapping MSIs into pirqs for PV on HVM guests, qemu is responsible
for doing the actual mapping and unmapping.
We only give qemu the desired pirq number when we ask to do the mapping
the first time, after that we should be reading back the pirq number
from qemu every time we want to re-enable the MSI.

This fixes a bug in xen_hvm_setup_msi_irqs that manifests itself when
trying to enable the same MSI for the second time: the old MSI to pirq
mapping is still valid at this point but xen_hvm_setup_msi_irqs would
try to assign a new pirq anyway.
A simple way to reproduce this bug is to assign an MSI capable network
card to a PV on HVM guest, if the user brings down the corresponding
ethernet interface and up again, Linux would fail to enable MSIs on the
device.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2010-12-02 14:34:25 +00:00
..
acpi.c x86/PCI: coalesce overlapping host bridge windows 2010-11-11 09:34:31 -08:00
amd_bus.c x86: Change range end to start+size 2010-02-10 17:47:17 -08:00
broadcom_bus.c PCI: read memory ranges out of Broadcom CNB20LE host bridge 2010-05-21 14:43:46 -07:00
bus_numa.c Merge branch 'x86-bootmem-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-03-03 08:15:05 -08:00
bus_numa.h Merge branch 'x86-bootmem-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-03-03 08:15:05 -08:00
common.c x86/PCI: Clean up pci_cache_line_size 2010-10-18 10:49:30 -04:00
direct.c x86/PCI: Convert pci_config_lock to raw_spinlock 2010-05-11 12:01:09 -07:00
early.c x86/PCI: remove early PCI pr_debug statements 2009-11-24 15:25:19 -08:00
fixup.c Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2009-04-01 09:47:12 -07:00
i386.c Merge branch 'stable/xen-pcifront-0.8.2' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen 2010-10-28 17:11:17 -07:00
init.c x86, olpc: Use pci subarch init for OLPC 2010-02-25 19:26:23 -08:00
irq.c PCI: update Intel chipset names and defines 2010-10-17 20:03:04 -07:00
legacy.c x86/PCI: pci, fix section mismatch 2010-07-30 09:29:09 -07:00
Makefile xen/x86/PCI: Add support for the Xen PCI subsystem 2010-10-18 10:49:35 -04:00
mmconfig_32.c x86/PCI: Convert pci_config_lock to raw_spinlock 2010-05-11 12:01:09 -07:00
mmconfig_64.c x86/PCI: MMCONFIG: add lookup function 2009-11-24 15:30:36 -08:00
mmconfig-shared.c x86/PCI: MMCONFIG: fix region end calculation 2010-10-17 20:03:07 -07:00
mrst.c x86, pci, mrst: Add extra sanity check in walking the PCI extended cap chain 2010-07-16 16:52:15 -07:00
numaq_32.c x86/PCI: Convert pci_config_lock to raw_spinlock 2010-05-11 12:01:09 -07:00
olpc.c PCI: OLPC: Only enable PCI configuration type override on XO-1 2010-10-15 13:09:51 -07:00
pcbios.c x86/PCI: Convert pci_config_lock to raw_spinlock 2010-05-11 12:01:09 -07:00
visws.c x86: Move pci init function to x86_init 2010-02-19 16:12:29 -08:00
xen.c xen: fix MSI setup and teardown for PV on HVM guests 2010-12-02 14:34:25 +00:00