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428c3ece97
qemu/include/hw
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Stefano Stabellini 428c3ece97 fix MSI injection on Xen 
On Xen MSIs can be remapped into pirqs, which are a type of event
channels. It's mostly for the benefit of PCI passthrough devices, to
avoid the overhead of interacting with the emulated lapic.

However remapping interrupts and MSIs is also supported for emulated
devices, such as the e1000 and virtio-net.

When an interrupt or an MSI is remapped into a pirq, masking and
unmasking is done by masking and unmasking the event channel. The
masking bit on the PCI config space or MSI-X table should be ignored,
but it isn't at the moment.

As a consequence emulated devices which use MSI or MSI-X, such as
virtio-net, don't work properly (the guest doesn't receive any
notifications). The mechanism was working properly when xen_apic was
introduced, but I haven't narrowed down which commit in particular is
causing the regression.

Fix the issue by ignoring the masking bit for MSI and MSI-X which have
been remapped into pirqs.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-02-06 20:44:10 +02:00
..
acpi acpi: add function to extract oem_id and oem_table_id from the user's SLIC 2016-02-06 20:44:10 +02:00
arm hw/arm/virt: add secure memory region and UART 2016-01-21 14:15:07 +00:00
audio isa: QOM'ify ISADevice 2013-06-07 14:55:33 +02:00
block fdc: add drive type qapi enum 2016-01-25 14:35:23 -05:00
char i.MX: Split UART emulator in a header file and a source file 2015-08-13 11:26:19 +01:00
cpu icc_bus: drop the unused files 2015-10-02 16:22:02 -03:00
cris cris: Remove the CRIS PIC glue 2014-02-03 14:04:00 +00:00
gpio i.MX: add support for lower and upper interrupt in GPIO. 2015-12-17 13:37:13 +00:00
i2c i.MX: Add I2C controller emulator 2015-09-07 10:39:30 +01:00
i386 intel_iommu: large page support 2016-02-06 20:44:10 +02:00
input input: switch hid mouse and tablet to the new input layer api. 2014-05-26 08:42:43 +02:00
intc arm_gic_kvm: Disable live migration if not supported 2015-10-27 12:00:50 +00:00
ipack ipack: Move IndustryPack out of hw/char/ 2014-02-14 21:11:53 +01:00
ipmi ipmi: introduce a struct ipmi_sdr_compact 2016-02-06 20:44:09 +02:00
isa isa: Clean up error handling around isa_bus_new() 2016-01-13 11:58:59 +01:00
kvm hw: move headers to include/ 2013-04-08 18:13:10 +02:00
lm32 hmp: Name HMP info handler functions hmp_info_SUBCOMMAND() 2015-02-18 11:58:50 +01:00
m68k hw: move headers to include/ 2013-04-08 18:13:10 +02:00
mem dimm: Correct type of MemoryHotplugState->base 2016-02-06 20:44:10 +02:00
mips net/dp8393x: QOM'ify 2015-06-11 10:13:30 +01:00
misc i.MX: move i.MX31 CCM object to register array 2016-01-11 15:52:18 +00:00
net i.MX: Add FEC Ethernet Emulator 2015-09-07 10:39:30 +01:00
nvram fw_cfg: remove offset argument from callback prototype 2015-12-15 11:45:59 +01:00
pci hw/pxb: introduce pxb-pcie expander for PCIe machines 2015-12-22 17:45:13 +02:00
pci-host q35: Remove MCHPCIState.guest_info field 2015-12-22 17:45:13 +02:00
ppc spapr: Remove rtas_st_buffer_direct() 2016-01-30 23:37:36 +11:00
s390x s390/sclp: store the increment_size in the sclp device 2015-09-07 16:10:44 +02:00
scsi scsi: remove scsi_req_free prototype 2015-12-04 09:39:55 +03:00
sd sdhci: add optional quirk property to disable card insertion/removal interrupts 2015-12-22 16:34:26 +08:00
sh4 sh7750: Change cpu field type to SuperHCPU 2013-04-13 13:51:45 +02:00
smbios smbios: add smbios 3.0 support 2015-09-07 10:39:28 +01:00
sparc QOM infrastructure fixes and device conversions 2015-03-02 13:20:43 +00:00
ssi xilinx_spips: Separate the state struct into a header 2016-01-21 14:15:03 +00:00
timer pc: acpi: move HPET from DSDT to SSDT 2016-01-09 23:20:18 +02:00
tricore target-tricore: Add board for systemmode 2014-09-01 14:49:20 +01:00
unicore32 hw: move headers to include/ 2013-04-08 18:13:10 +02:00
usb usb: move ehci register defines to header file 2014-06-02 16:28:59 +02:00
vfio vfio: Record host IOMMU's available IO page sizes 2015-10-05 12:38:41 -06:00
virtio virtio: introduce virtqueue_alloc_element 2016-02-06 20:44:08 +02:00
watchdog s390x/watchdog: introduce diag288 watchdog device 2015-06-11 17:45:49 +02:00
xen fix MSI injection on Xen 2016-02-06 20:44:10 +02:00
boards.h Move SET_MACHINE_COMPAT macro to boards.h 2016-01-11 15:29:05 +11:00
bt.h bt: check struct sizes 2015-12-04 09:39:55 +03:00
compat.h fdc: change auto fallback drive for ISA FDC to 288 2016-01-25 14:36:01 -05:00
devices.h arm: fix location of some include files 2013-04-15 15:16:01 +02:00
elf_ops.h elf: Update EM_MOXIE definition 2015-09-25 12:04:43 +02:00
empty_slot.h hw: move headers to include/ 2013-04-08 18:13:10 +02:00
fw-path-provider.h fw-path-provider: Change GPL version to 2+ 2014-04-07 15:36:07 +02:00
hotplug.h misc: Fix new typos in comments 2015-01-15 10:44:13 +03:00
hw.h vmstate: define vmstate_info_uinttl 2016-01-16 12:01:23 +00:00
ide.h Call pci_piix3_xen_ide_unplug from unplug_disks 2014-02-20 17:28:08 +00:00
irq.h irq: Remove qemu_irq_intercept_out 2014-10-23 16:41:25 +02:00
loader.h vl: move rom_load_all after machine init done 2015-07-07 11:03:16 +02:00
nmi.h nmi: Implement inject_nmi() for non-monitor context use 2015-06-11 17:45:50 +02:00
pcmcia.h hmp: Remove "info pcmcia" 2014-10-24 12:19:11 +01:00
platform-bus.h sysbus: Add new platform bus helper device 2014-11-04 23:26:14 +01:00
ptimer.h vmstate: Make VMSTATE_STRUCT_POINTER take type, not ptr-to-type 2014-02-04 15:51:45 +01:00
qdev-core.h qobject: Rename qtype_code to QType 2015-12-17 08:21:28 +01:00
qdev-dma.h qdev: Remove hex8/32/64 property types 2014-02-14 21:12:04 +01:00
qdev-properties.h fdc: Add fallback option 2016-01-25 14:35:23 -05:00
qdev.h hw: move headers to include/ 2013-04-08 18:13:10 +02:00
stream.h Trivial grammar and spelling fixes 2013-05-01 20:55:21 +04:00
sysbus.h sysbus: add irq_routing_notifier 2015-07-06 12:15:14 -06:00
usb.h usb: Remove unused functions 2015-04-30 16:05:48 +03:00