Commit Graph

74 Commits

Author SHA1 Message Date
Paolo Bonzini 18268b6016 KVM: move SIG_IPI handling to kvm-all.c
This lets us remove a bunch of CONFIG_LINUX defines.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-03 16:40:02 +01:00
Pavel Fedin 767a554a0c kvm-all: Pass requester ID to MSI routing functions
Introduce global kvm_msi_use_devid flag plus associated
kvm_msi_devid_required() macro. Passes the device ID,
if needed, while building the MSI route entry. Device IDs are
required by the ARM GICv3 ITS (IRQ remapping function is based on
this information).

Signed-off-by: Pavel Fedin <p.fedin@samsung.com>
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Message-id: 1474616617-366-5-git-send-email-eric.auger@redhat.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-10-04 13:28:09 +01:00
Cao jin c2cd627ddb kvm-all: drop kvm_setup_guest_memory
kvm_setup_guest_memory only does "madvise to QEMU_MADV_DONTFORK" and
is only called by ram_block_add, which actually is duplicate code.
Bonus: add simple comment for kvm_has_sync_mmu to make life easier.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Cao jin <caoj.fnst@cn.fujitsu.com>
Message-Id: <1473662096-32598-1-git-send-email-caoj.fnst@cn.fujitsu.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-09-13 19:09:43 +02:00
Peter Xu 3f1fea0fb5 kvm-irqchip: do explicit commit when update irq
In the past, we are doing gsi route commit for each irqchip route
update. This is not efficient if we are updating lots of routes in the
same time. This patch removes the committing phase in
kvm_irqchip_update_msi_route(). Instead, we do explicit commit after all
routes updated.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-07-21 20:44:19 +03:00
Peter Xu d1f6af6a17 kvm-irqchip: simplify kvm_irqchip_add_msi_route
Changing the original MSIMessage parameter in kvm_irqchip_add_msi_route
into the vector number. Vector index provides more information than the
MSIMessage, we can retrieve the MSIMessage using the vector easily. This
will avoid fetching MSIMessage every time before adding MSI routes.

Meanwhile, the vector info will be used in the coming patches to further
enable gsi route update notifications.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-07-21 20:44:18 +03:00
Gu Zheng 4c055ab54f cpu: Reclaim vCPU objects
In order to deal well with the kvm vcpus (which can not be removed without any
protection), we do not close KVM vcpu fd, just record and mark it as stopped
into a list, so that we can reuse it for the appending cpu hot-add request if
possible. It is also the approach that kvm guys suggested:
https://www.mail-archive.com/kvm@vger.kernel.org/msg102839.html

Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: Zhu Guihua <zhugh.fnst@cn.fujitsu.com>
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
               [- Explicit CPU_REMOVE() from qemu_kvm/tcg_destroy_vcpu()
                  isn't needed as it is done from cpu_exec_exit()
                - Use iothread mutex instead of global mutex during
                  destroy
                - Don't cleanup vCPU object from vCPU thread context
                  but leave it to the callers (device_add/device_del)]
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
2016-05-30 14:03:59 +10:00
Paolo Bonzini 741da0d38b hw: cannot include hw/hw.h from user emulation
All qdev definitions are available from other headers, user-mode
emulation does not need hw/hw.h.

By considering system emulation only, it is simpler to disentangle
hw/hw.h from NEED_CPU_H.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-05-19 16:42:28 +02:00
Peter Maydell d38ea87ac5 all: Clean up includes
Clean up includes so that osdep.h is included first and headers
which it implies are not included manually.

This commit was created with scripts/clean-includes.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1454089805-5470-16-git-send-email-peter.maydell@linaro.org
2016-02-04 17:41:30 +00:00
Jason Wang 351082238d KVM: add support for any length io eventfd
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
2015-11-12 15:49:32 +02:00
Thomas Huth 28143b409f kvm: Move x86-specific functions into target-i386/kvm.c
The functions for checking xcrs, xsave and pit_state2 are
only used on x86, so they should reside in target-i386/kvm.c.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1444933820-6968-1-git-send-email-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-10-19 10:13:07 +02:00
Pavel Fedin dc9f06ca81 kvm: Pass PCI device pointer to MSI routing functions
In-kernel ITS emulation on ARM64 will require to supply requester IDs.
These IDs can now be retrieved from the device pointer using new
pci_requester_id() function.

This patch adds pci_dev pointer to KVM GSI routing functions and makes
callers passing it.

x86 architecture does not use requester IDs, but hw/i386/kvm/pci-assign.c
also made passing PCI device pointer instead of NULL for consistency with
the rest of the code.

Signed-off-by: Pavel Fedin <p.fedin@samsung.com>
Message-Id: <ce081423ba2394a4efc30f30708fca07656bc500.1444916432.git.p.fedin@samsung.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-10-19 10:13:07 +02:00
Eric Auger 879904e863 kvm: some fixes to kvm_resamplefds_allowed
Commit f41389ae3c introduced kvm_resamplefds_enabled() and
associated kvm_resamplefds_allowed boolean. This patch adds
non-KVM version for kvm_resamplefds_enabled and also declares
kvm_resamplefds_allowed in kvm-stub as it is done for fellow
kvm_irqfds_allowed.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2015-07-06 12:15:14 -06:00
Eric Auger 1c9b71a731 kvm: rename kvm_irqchip_[add,remove]_irqfd_notifier with gsi suffix
Anticipating for the introduction of new add/remove functions taking
a qemu_irq parameter, let's rename existing ones with a gsi suffix.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
Tested-by: Vikram Sethi <vikrams@codeaurora.org>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
2015-07-06 12:15:13 -06:00
Igor Mammedov b8865591d4 pc: kvm: check if KVM has free memory slots to avoid abort()
When more memory devices are used than available
KVM memory slots, QEMU crashes with:

kvm_alloc_slot: no free slot available
Aborted (core dumped)

Fix this by checking that KVM has a free slot before
attempting to map memory in guest address space.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2014-11-23 12:11:29 +02:00
Eduardo Habkost 782c3f2939 accel: Move KVM accel registration to kvm-all.c
Note that this has an user-visible side-effect: instead of reporting
"KVM is not supported for this target", QEMU binaries not supporting KVM
will report "kvm accelerator does not exist".

As kvm_availble() always return 1 when CONFIG_KVM is enabled, we don't
need to set AccelClass.available anymore. kvm_enabled() is not being
completely removed yet only because qmp_query_kvm() still uses it.

This also allows us to make kvm_init() static.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-04 08:59:15 +02:00
Nikolay Nikolaev 69e03ae64b Add kvm_eventfds_enabled function
Add a function to check if the eventfd capability is present in KVM in
the host kernel.

Signed-off-by: Antonios Motakis <a.motakis@virtualopensystems.com>
Signed-off-by: Nikolay Nikolaev <n.nikolaev@virtualopensystems.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19 16:41:54 +03:00
Cornelia Huck d426d9fba8 s390x/virtio-ccw: wire up irq routing and irqfds
Make use of the new s390 adapter irq routing support to enable real
in-kernel irqfds for virtio-ccw with adapter interrupts.

Note that s390 doesn't provide the common KVM_CAP_IRQCHIP capability, but
rather needs KVM_CAP_S390_IRQCHIP to be enabled. This is to ensure backward
compatibility.

Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-05-20 13:05:58 +02:00
Marcel Apfelbaum f1e298794d machine: Replace QEMUMachine by MachineClass in accelerator configuration
This minimizes QEMUMachine usage, as part of machine QOM-ification.

Signed-off-by: Marcel Apfelbaum <marcel.a@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-05-05 19:08:49 +02:00
Andreas Färber 602a3921ff Revert "KVM: Split QEMUMachine typedef into separate header"
This reverts commit 9c06a1f79f.
The new header sysemu/qemumachine.h is undesired.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-13 03:49:48 +01:00
Aneesh Kumar K.V 135a129a1c kvm: Add a new machine option kvm-type
Targets like ppc64 support different types of KVM, one which use
hypervisor mode and the other which doesn't. Add a new machine
option kvm-type that helps in selecting the respective ones
We also add a new QEMUMachine callback get_vm_type that helps
in mapping the string representation of kvm type specified.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
[agraf: spelling fixes, use error_report(), use qemumachine.h]
Signed-off-by: Alexander Graf <agraf@suse.de>
2014-03-05 03:06:24 +01:00
Alexander Graf 9c06a1f79f KVM: Split QEMUMachine typedef into separate header
Older gcc versions (such as the one in SLES11) get confused when you declare
a typedef on the same struct twice.

To work around that limitation, let's extract the QEMUMachine typedef into a
separate header file that is guarded by preprocessor duplicate include checks.

This fixes the following type of compile errors for me:

  In file included from vl.c:125:
  include/hw/xen/xen.h:39: error: redefinition of typedef "QEMUMachine"
  include/sysemu/kvm.h:155: error: previous declaration of "QEMUMachine" was here

Signed-off-by: Alexander Graf <agraf@suse.de>
2014-03-05 03:06:24 +01:00
Alexey Kardashevskiy 76fe21deda kvm irqfd: support direct msimessage to irq translation
On PPC64 systems MSI Messages are translated to system IRQ in a PCI
host bridge. This is already supported for emulated MSI/MSIX but
not for irqfd where the current QEMU allocates IRQ numbers from
irqchip and maps MSIMessages to IRQ in the host kernel.

This adds a new direct mapping flag which tells
the kvm_irqchip_add_msi_route() function that a new VIRQ
should not be allocated, instead the value from MSIMessage::data
should be used. It is up to the platform code to make sure that
this contains a valid IRQ number as sPAPR does in spapr_pci.c.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-09-20 12:37:52 +02:00
Anthony Liguori b5d54bd421 Merge remote-tracking branch 'qemu-kvm/uq/master' into stable-1.5
* qemu-kvm/uq/master:
  kvm-stub: fix compilation
  kvm: shorten the parameter list for get_real_device()
  kvm: i386: fix LAPIC TSC deadline timer save/restore
  kvm-all.c: max_cpus should not exceed KVM vcpu limit
  kvm: Simplify kvm_handle_io
  kvm: x86: fix setting IA32_FEATURE_CONTROL with nested VMX disabled
  kvm: add KVM_IRQFD_FLAG_RESAMPLE support
  kvm: migrate vPMU state
  target-i386: remove tabs from target-i386/cpu.h
  Initialize IA32_FEATURE_CONTROL MSR in reset and migration

Conflicts:
	target-i386/cpu.h
	target-i386/kvm.c

aliguori: fixup trivial conflicts due to whitespace and added cpu
          argument

Signed-off-by: Anthony Liguori <anthony@codemonkey.ws>
2013-08-29 17:21:51 -05:00
Paolo Bonzini 821c808bd1 kvm-stub: fix compilation
Non-KVM targets fail compilation on the uq/master branch.
Fix the prototype of kvm_irqchip_add_irqfd_notifier to match
the one in kvm-all.c.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-08-28 17:07:02 +03:00
Stefan Weil 38e478eccf kvm: Change prototype of kvm_update_guest_debug()
Passing a CPUState pointer instead of a CPUArchState pointer eliminates
the last target dependent data type in sysemu/kvm.h.

It also simplifies the code.

Signed-off-by: Stefan Weil <sw@weilnetz.de>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-07-26 23:05:31 +02:00
Andreas Färber 6227881415 kvm: Change kvm_{insert,remove}_breakpoint() argument to CPUState
CPUArchState is no longer directly used since converting CPU loops to
CPUState.

Prepares for changing GDBState::c_cpu to CPUState.

Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-07-23 02:41:32 +02:00
Andreas Färber 1d5791f4a6 kvm: Change kvm_remove_all_breakpoints() argument to CPUState
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-07-09 21:20:28 +02:00
Andreas Färber 80b7cd7354 kvm: Free current_cpu identifier
Since CPU loops are done as last step in kvm_{insert,remove}_breakpoint()
and kvm_remove_all_breakpoints(), we do not need to distinguish between
invoking CPU and iterated CPUs and can thereby free the identifier for
use as a global variable.

Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-07-09 21:20:28 +02:00
Alexander Graf 7b7745930b KVM: Export kvm_init_irq_routing
On PPC, we can have different types of interrupt controllers, so we really
only know that we are going to use one when we created it.

Export kvm_init_irq_routing() to common code, so that we don't have to call
kvm_irqchip_create().

Signed-off-by: Alexander Graf <agraf@suse.de>
2013-07-01 01:11:14 +02:00
Andreas Färber 1458c36313 kvm: Change kvm_cpu_exec() argument to CPUState
It no longer uses CPUArchState.

Prepares for changing qemu_kvm_cpu_thread_fn() opaque to CPUState.

Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-06-28 13:25:12 +02:00
Andreas Färber 491d6e80ea kvm: Change kvm_set_signal_mask() argument to CPUState
CPUArchState is no longer needed.

Prepares for changing qemu_kvm_init_cpu_signals() argument to CPUState.

Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-06-28 13:25:12 +02:00
Andreas Färber dd1750d798 kvm: Change kvm_cpu_synchronize_state() argument to CPUState
It no longer relies on CPUArchState since 20d695a.

Reviewed-by: liguang <lig.fnst@cn.fujitsu.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-06-28 13:25:12 +02:00
Jordan Justen df9c8b758a kvm: add kvm_readonly_mem_enabled
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1369816047-16384-3-git-send-email-jordan.l.justen@intel.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-05-29 08:15:35 -05:00
Igor Mammedov 13eed94ed5 cpu: Call cpu_synchronize_post_init() from DeviceClass::realize()
If hotplugged, synchronize CPU state to KVM.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-05-01 13:04:17 +02:00
Igor Mammedov c4cfef5e8a cpu: Make kvm-stub.o available outside softmmu
It will provide stubs for *-user targets once softmmu-specific calls
are attempted from common CPU code.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-05-01 13:04:17 +02:00
Anthony Liguori 5dff24beba pci: add pci test device
This adds a new device that we can use for testing PCI PIO and MMIO, with and
 without ioeventfd in different configurations.  FAST_MMIO will be added if/when
 kvm supports it.  Also included are minor cleanups in kvm APIs that it needs.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge remote-tracking branch 'mst/tags/for_anthony' into staging

pci: add pci test device

This adds a new device that we can use for testing PCI PIO and MMIO, with and
without ioeventfd in different configurations.  FAST_MMIO will be added if/when
kvm supports it.  Also included are minor cleanups in kvm APIs that it needs.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Mon 15 Apr 2013 05:42:24 PM CDT using RSA key ID D28D5469
# gpg: Can't check signature: public key not found

# By Michael S. Tsirkin
# Via Michael S. Tsirkin
* mst/tags/for_anthony:
  pci: add pci test device
  kvm: support non datamatch ioeventfd
  kvm: support any size for pio eventfd
  kvm: remove unused APIs

Message-id: cover.1366272004.git.mst@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-04-19 08:38:05 -05:00
Igor Mammedov 3f24a58fa7 cpu: Pass CPUState to *cpu_synchronize_post*()
... so it could be called without requiring CPUArchState.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-04-16 01:19:46 +02:00
Paolo Bonzini 0bc3cd624f include: avoid useless includes of exec/ headers
Headers in include/exec/ are for the deepest innards of QEMU,
they should almost never be included directly.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-04-15 18:19:26 +02:00
Michael S. Tsirkin 500ffd4a29 kvm: remove unused APIs
There are only used internally now, move them
out of header and out of stub.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2013-04-14 14:05:27 +03:00
Andreas Färber 290adf3896 kvm: Pass CPUState to kvm_on_sigbus_vcpu()
Since commit 20d695a925 (kvm: Pass
CPUState to kvm_arch_*) CPUArchState is no longer needed.

Allows to change qemu_kvm_eat_signals() argument as well.

Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
2013-01-28 16:57:56 +01:00
Andreas Färber 504134d27f kvm: Pass CPUState to kvm_init_vcpu()
CPUArchState is no longer needed, and it thereby no longer depends on
NEED_CPU_H.

Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-01-15 04:09:13 +01:00
Michael S. Tsirkin 078bbb5040 kvm: add stub for update msi route
Will be used by virtio-pci.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2013-01-07 19:42:23 +02:00
Paolo Bonzini 9c17d615a6 softmmu: move include files to include/sysemu/
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19 08:32:45 +01:00
Paolo Bonzini 022c62cbbc exec: move include files to include/exec/
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-19 08:31:31 +01:00
Michael S. Tsirkin a2cb15b0dd pci: update all users to look in pci/
update all users so we can remove the makefile hack.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2012-12-17 13:02:26 +02:00
Avi Kivity 95d2994a2f memory: manage coalesced mmio via a MemoryListener
Instead of calling a global function on coalesced mmio changes, which
routes the call to kvm if enabled, add coalesced mmio hooks to
MemoryListener and make kvm use that instead.

The motivation is support for multiple address spaces (which means we
we need to filter the call on the right address space) but the result
is cleaner as well.

Signed-off-by: Avi Kivity <avi@redhat.com>
2012-10-22 14:50:00 +02:00
Jan Kiszka b131c74a0e kvm: Clean up irqfd API
No need to expose the fd-based interface, everyone will already be fine
with the more handy EventNotifier variant. Rename the latter to clarify
that we are still talking about irqfds here.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2012-09-09 17:03:09 +03:00
Peter Maydell f3e1bed8da kvm: Decouple 'GSI routing' from 'kernel irqchip'
Don't assume having an in-kernel irqchip means that GSI
routing is enabled.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Avi Kivity <avi@redhat.com>
2012-08-09 16:16:57 +03:00
Peter Maydell 614e41bc26 kvm: Decouple 'MSI routing via irqfds' from 'kernel irqchip'
Decouple another x86-specific assumption about what irqchips imply.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Avi Kivity <avi@redhat.com>
2012-08-09 16:16:56 +03:00
Peter Maydell cc7e0ddf5a kvm: Decouple 'irqfds usable' from 'kernel irqchip'
Instead of assuming that we can use irqfds if and only if
kvm_irqchip_in_kernel(), add a bool to the KVMState which
indicates this, and is set only on x86 and only if the
irqchip is in the kernel.

The kernel documentation implies that the only thing
you need to use KVM_IRQFD is that KVM_CAP_IRQFD is
advertised, but this seems to be untrue. In particular
the kernel does not (alas) return a sensible error if you
try to set up an irqfd when you haven't created an irqchip.
If it did we could remove all this nonsense and let the
kernel return the error code.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2012-08-09 16:16:56 +03:00