qemu/target
Peter Xu fd56356422 kvm: irqchip: skip update msi when disabled
It's possible that one device kept its irqfd/virq there even when
MSI/MSIX was disabled globally for that device. One example is
virtio-net-pci (see commit f1d0f15a6 and virtio_pci_vq_vector_mask()).
It is used as a fast path to avoid allocate/release irqfd/virq
frequently when guest enables/disables MSIX.

However, this fast path brought a problem to msi_route_list, that the
device MSIRouteEntry is still dangling there even if MSIX disabled -
then we cannot know which message to fetch, even if we can, the messages
are meaningless. In this case, we can just simply ignore this entry.

It's safe, since when MSIX is enabled again, we'll rebuild them no
matter what.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1448813

Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1494309644-18743-4-git-send-email-peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-06-06 20:18:35 +02:00
..
alpha target/alpha: Use goto_tb for fallthru between TBs 2017-06-05 09:25:42 -07:00
arm x86 and machine queue, 2017-06-05 2017-06-06 10:00:34 +01:00
cris qom/cpu: move tlb_flush to cpu_common_reset 2017-01-13 14:24:31 +00:00
hppa target/hppa: Use tcg_gen_lookup_and_goto_ptr 2017-06-05 09:25:42 -07:00
i386 kvm: irqchip: skip update msi when disabled 2017-06-06 20:18:35 +02:00
lm32 qom/cpu: move tlb_flush to cpu_common_reset 2017-01-13 14:24:31 +00:00
m68k This is the same as the v3 posted except a re-base and a few extra signoffs 2017-01-16 18:23:02 +00:00
microblaze cputlb: drop flush_global flag from tlb_flush 2017-01-13 14:24:37 +00:00
mips target/mips: optimize indirect branches 2017-06-05 09:25:42 -07:00
moxie qom/cpu: move tlb_flush to cpu_common_reset 2017-01-13 14:24:31 +00:00
nios2 target/nios2: Fix 64-bit ilp32 compilation 2017-06-05 09:25:42 -07:00
openrisc target/openrisc: Support non-busy idle state using PMR SPR 2017-05-04 09:39:14 +09:00
ppc numa: move numa_node from CPUState into target specific classes 2017-06-05 14:59:09 -03:00
s390x target/s390: Use tcg_gen_lookup_and_goto_ptr 2017-06-05 09:25:42 -07:00
sh4 target/sh4: fix RTE instruction delay slot 2017-05-30 21:00:56 +02:00
sparc shutdown: Add source information to SHUTDOWN and RESET 2017-05-23 13:28:17 +02:00
tilegx migration: Remove unneeded includes of migration/vmstate.h 2017-06-01 18:49:22 +02:00
tricore qom/cpu: move tlb_flush to cpu_common_reset 2017-01-13 14:24:31 +00:00
unicore32 cputlb: drop flush_global flag from tlb_flush 2017-01-13 14:24:37 +00:00
xtensa target/xtensa: handle unknown registers in gdbstub 2017-06-06 02:40:48 -07:00