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2012-07-18Merge remote-tracking branch 'qemu-kvm/uq/master' into stagingAnthony Liguori1-0/+2
* qemu-kvm/uq/master: virtio: move common irqfd handling out of virtio-pci virtio: move common ioeventfd handling out of virtio-pci event_notifier: add event_notifier_set_handler memory: pass EventNotifier, not eventfd ivshmem: wrap ivshmem_del_eventfd loops with transaction ivshmem: use EventNotifier and memory API event_notifier: add event_notifier_init_fd event_notifier: remove event_notifier_test event_notifier: add event_notifier_set apic: Defer interrupt updates to VCPU thread apic: Reevaluate pending interrupts on LVT_LINT0 changes apic: Resolve potential endless loop around apic_update_irq kvm: expose tsc deadline timer feature to guest kvm_pv_eoi: add flag support kvm: Don't abort on kvm_irqchip_add_msi_route()
2012-07-12virtio: move common irqfd handling out of virtio-pciPaolo Bonzini1-0/+2
All transports can use the same event handler for the irqfd, though the exact mechanics of the assignment will be specific. Note that there are three states: handled by the kernel, handled in userspace, disabled. This also lets virtio use event_notifier_set_handler. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-07-10s390: autodetect map privateChristian Borntraeger1-0/+2
By default qemu will use MAP_PRIVATE for guest pages. This will write protect pages and thus break on s390 systems that dont support this feature. Therefore qemu has a hack to always use MAP_SHARED for s390. But MAP_SHARED has other problems (no dirty pages tracking, a lot more swap overhead etc.) Newer systems allow the distinction via KVM_CAP_S390_COW. With this feature qemu can use the standard qemu alloc if available, otherwise it will use the old s390 hack. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Acked-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2012-05-21kvm: Introduce kvm_irqchip_add/remove_irqfdJan Kiszka1-0/+3
Add services to associate an eventfd file descriptor as input with an IRQ line as output. Such a line can be an input pin of an in-kernel irqchip or a virtual line returned by kvm_irqchip_add_route. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-05-21kvm: Make kvm_irqchip_commit_routes an internal serviceJan Kiszka1-1/+0
Automatically commit route changes after kvm_add_routing_entry and kvm_irqchip_release_virq. There is no performance relevant use case for which collecting multiple route changes is beneficial. This makes kvm_irqchip_commit_routes an internal service which assert()s that the corresponding IOCTL will always succeed. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-05-21kvm: Publicize kvm_irqchip_release_virqJan Kiszka1-0/+1
This allows to drop routes created by kvm_irqchip_add_irq/msi_route again. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-05-21kvm: Introduce kvm_irqchip_add_msi_routeJan Kiszka1-4/+6
Add a service that establishes a static route from a virtual IRQ line to an MSI message. Will be used for IRQFD and device assignment. As we will use this service outside of CONFIG_KVM protected code, stub it properly. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-05-21kvm: Rename kvm_irqchip_add_route to kvm_irqchip_add_irq_routeJan Kiszka1-1/+1
We will add kvm_irqchip_add_msi_route, so let's make the difference clearer. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-05-16kvm: Introduce basic MSI support for in-kernel irqchipsJan Kiszka1-0/+1
This patch basically adds kvm_irqchip_send_msi, a service for sending arbitrary MSI messages to KVM's in-kernel irqchip models. As the original KVM API requires us to establish a static route from a pseudo GSI to the target MSI message and inject the MSI via toggling that virtual IRQ, we need to play some tricks to make this interface transparent. We create those routes on demand and keep them in a hash table. Succeeding messages can then search for an existing route in the table first and reuse it whenever possible. If we should run out of limited GSIs, we simply flush the table and rebuild it as messages are sent. This approach is rather simple and could be optimized further. However, latest kernels contains a more efficient MSI injection interface that will obsolete the GSI-based dynamic injection. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-04-12kvm: Drop unused kvm_pit_in_kernelJan Kiszka1-2/+0
This is now implied by kvm_irqchip_in_kernel. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-04-12kvm: allow arbitrarily sized mmio ioeventfdMichael S. Tsirkin1-1/+2
We use a 2 byte ioeventfd for virtio memory, add support for this. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Amos Kong <akong@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-03-14Rename CPUState -> CPUArchStateAndreas Färber1-30/+30
Scripted conversion: for file in *.[hc] hw/*.[hc] hw/kvm/*.[hc] linux-user/*.[hc] linux-user/m68k/*.[hc] bsd-user/*.[hc] darwin-user/*.[hc] tcg/*/*.[hc] target-*/cpu.h; do sed -i "s/CPUState/CPUArchState/g" $file done All occurrences of CPUArchState are expected to be replaced by QOM CPUState, once all targets are QOM'ified and common fields have been extracted. Signed-off-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
2012-03-07kvm: Add kvm_has_pit_state2 helperJan Kiszka1-0/+1
To be used for in-kernel PIT emulation. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2012-02-08kvm: Implement kvm_irqchip_in_kernel like kvm_enabledJan Kiszka1-3/+5
To both avoid that kvm_irqchip_in_kernel always has to be paired with kvm_enabled and that the former ends up in a function call, implement it like the latter. This means keeping the state in a global variable and defining kvm_irqchip_in_kernel as a preprocessor macro. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-01-19kvm: x86: Add user space part for in-kernel APICJan Kiszka1-0/+4
This introduces the alternative APIC device which makes use of KVM's in-kernel device model. External NMI injection via LINT1 is emulated by checking the current state of the in-kernel APIC, only injecting a NMI into the VCPU if LINT1 is unmasked and configured to DM_NMI. MSI is not yet supported, so we disable this when the in-kernel model is in use. CC: Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
2012-01-19kvm: x86: Establish IRQ0 override controlJan Kiszka1-0/+2
KVM is forced to disable the IRQ0 override when we run with in-kernel irqchip but without IRQ routing support of the kernel. Set the fwcfg value correspondingly. This aligns us with qemu-kvm. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
2012-01-19kvm: Introduce core services for in-kernel irqchip supportJan Kiszka1-0/+8
Add the basic infrastructure to active in-kernel irqchip support, inject interrupts into these models, and maintain IRQ routes. Routing is optional and depends on the host arch supporting KVM_CAP_IRQ_ROUTING. When it's not available on x86, we looe the HPET as we can't route GSI0 to IOAPIC pin 2. In-kernel irqchip support will once be controlled by the machine property 'kernel_irqchip', but this is not yet wired up. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
2011-12-20kvm: switch kvm slots to use host virtual address instead of ram_addr_tAvi Kivity1-2/+2
This simplifies a later switch to the memory API in slot management. Signed-off-by: Avi Kivity <avi@redhat.com>
2011-06-20kvm: x86: Pass KVMState to kvm_arch_get_supported_cpuidJan Kiszka1-1/+1
kvm_arch_get_supported_cpuid checks for global cpuid restrictions, it does not require any CPUState reference. Changing its interface allows to call it before any VCPU is initialized. CC: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-03-16kvm: x86: Push kvm_arch_debug to kvm_arch_handle_exitJan Kiszka1-2/+0
There are no generic bits remaining in the handling of KVM_EXIT_DEBUG. So push its logic completely into arch hands, i.e. only x86 so far. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-03-15kvm: Rename kvm_arch_process_irqchip_events to async_eventsJan Kiszka1-1/+1
We will broaden the scope of this function on x86 beyond irqchip events. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Make kvm_state globally availableJan Kiszka1-0/+1
KVM-assisted devices need access to it but we have no clean channel to distribute a reference. As a workaround until there is a better solution, export kvm_state for global use, though use should remain restricted to the mentioned scenario. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14Introduce log_start/log_stop in CPUPhysMemoryClientAnthony PERARD1-3/+0
In order to use log_start/log_stop with Xen as well in the vga code, this two operations have been put in CPUPhysMemoryClient. The two new functions cpu_physical_log_start,cpu_physical_log_stop are used in hw/vga.c and replace the kvm_log_start/stop. With this, vga does no longer depends on kvm header. [ Jan: rebasing and style fixlets ] Signed-off-by: Anthony PERARD <anthony.perard@citrix.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Drop return values from kvm_arch_pre/post_runJan Kiszka1-3/+2
We do not check them, and the only arch with non-empty implementations always returns 0 (this is also true for qemu-kvm). Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> CC: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-02-14kvm: Provide sigbus services arch-independentlyJan Kiszka1-2/+5
Provide arch-independent kvm_on_sigbus* stubs to remove the #ifdef'ery from cpus.c. This patch also fixes --disable-kvm build by providing the missing kvm_on_sigbus_vcpu kvm-stub. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Acked-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-01-23kvm: Consolidate must-have capability checksJan Kiszka1-0/+10
Instead of splattering the code with #ifdefs and runtime checks for capabilities we cannot work without anyway, provide central test infrastructure for verifying their availability both at build and runtime. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-01-23kvm: Drop smp_cpus argument from init functionsJan Kiszka1-2/+2
No longer used. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-01-10kvm: test for ioeventfd support on old kernelsStefan Hajnoczi1-0/+1
There used to be a limit of 6 KVM io bus devices in the kernel. On such a kernel, we can't use many ioeventfds for host notification since the limit is reached too easily. Add an API to test for this condition. Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2010-10-20MCE: Relay UCR MCE to guestMarcelo Tosatti1-0/+3
Port qemu-kvm's commit 4b62fff1101a7ad77553147717a8bd3bf79df7ef Author: Huang Ying <ying.huang@intel.com> Date: Mon Sep 21 10:43:25 2009 +0800 MCE: Relay UCR MCE to guest UCR (uncorrected recovery) MCE is supported in recent Intel CPUs, where some hardware error such as some memory error can be reported without PCC (processor context corrupted). To recover from such MCE, the corresponding memory will be unmapped, and all processes accessing the memory will be killed via SIGBUS. For KVM, if QEMU/KVM is killed, all guest processes will be killed too. So we relay SIGBUS from host OS to guest system via a UCR MCE injection. Then guest OS can isolate corresponding memory and kill necessary guest processes only. SIGBUS sent to main thread (not VCPU threads) will be broadcast to all VCPU threads as UCR MCE. aliguori: fix build Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-10-20Add RAM -> physical addr mapping in MCE simulationHuang Ying1-0/+6
In QEMU-KVM, physical address != RAM address. While MCE simulation needs physical address instead of RAM address. So kvm_physical_memory_addr_from_ram() is implemented to do the conversion, and it is invoked before being filled in the IA32_MCi_ADDR MSR. Reported-by: Dean Nelson <dnelson@redhat.com> Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-08-10Add function to assign ioeventfd to MMIO.Cam Macdonell1-0/+1
Signed-off-by: Cam Macdonell <cam@cs.ualberta.ca> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-06-28kvm: Enable XSAVE live migration supportSheng Yang1-0/+2
Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-06-28kvm: Extend kvm_arch_get_supported_cpuid() to support indexSheng Yang1-1/+1
Would use it later for XSAVE related CPUID. Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-06-13Move stdbool.hPaul Brook1-1/+0
Move inclusion of stdbool.h to common header files, instead of including in an ad-hoc manner. Signed-off-by: Paul Brook <paul@codesourcery.com>
2010-05-11Do not stop VM if emulation failed in userspace.Gleb Natapov1-0/+2
Continue vcpu execution in case emulation failure happened while vcpu was in userspace. In this case #UD will be injected into the guest allowing guest OS to kill offending process and continue. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-05-11kvm: enable smp > 1Marcelo Tosatti1-0/+2
Process INIT/SIPI requests and enable -smp > 1. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-04-26KVM: x86: Add debug register saving and restoringJan Kiszka1-0/+1
Make use of the new KVM_GET/SET_DEBUGREGS to save/restore the x86 debug registers. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-04-19provide a stub version of kvm-all.c if !CONFIG_KVMPaolo Bonzini1-10/+3
This allows limited use of kvm functions (which will return ENOSYS) even in once-compiled modules. The patch also improves a bit the error messages for KVM initialization. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> [blauwirbel@gmail.com: fixed Win32 build] Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-04-09move around definitions in kvm.h that do not require CPUStatePaolo Bonzini1-4/+4
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-04-01kvm: add API to set ioeventfdMichael S. Tsirkin1-1/+17
Comment on kvm usage: rather than require users to do if (kvm_enabled()) and/or ifdefs, this patch adds an API that, internally, is defined to stub function on non-kvm build, and checks kvm_enabled for non-kvm run. While rest of qemu code still uses if (kvm_enabled()), I think this approach is cleaner, and we should convert rest of code to it long term. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-03-29Allow various header files to be included from non-CPU codeBlue Swirl1-3/+4
Allow balloon.h, gdbstub.h and kvm.h to be included from non-CPU code. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-03-12Disable phsyical memory handling in userspace emulation.Paul Brook1-0/+2
Code to handle physical memory access is not meaningful in usrmode emulation, so disable it. Signed-off-by: Paul Brook <paul@codesourcery.com>
2010-03-04KVM: Rework VCPU state writeback APIJan Kiszka1-1/+24
This grand cleanup drops all reset and vmsave/load related synchronization points in favor of four(!) generic hooks: - cpu_synchronize_all_states in qemu_savevm_state_complete (initial sync from kernel before vmsave) - cpu_synchronize_all_post_init in qemu_loadvm_state (writeback after vmload) - cpu_synchronize_all_post_init in main after machine init - cpu_synchronize_all_post_reset in qemu_system_reset (writeback after system reset) These writeback points + the existing one of VCPU exec after cpu_synchronize_state map on three levels of writeback: - KVM_PUT_RUNTIME_STATE (during runtime, other VCPUs continue to run) - KVM_PUT_RESET_STATE (on synchronous system reset, all VCPUs stopped) - KVM_PUT_FULL_STATE (on init or vmload, all VCPUs stopped as well) This level is passed to the arch-specific VCPU state writing function that will decide which concrete substates need to be written. That way, no writer of load, save or reset functions that interact with in-kernel KVM states will ever have to worry about synchronization again. That also means that a lot of reasons for races, segfaults and deadlocks are eliminated. cpu_synchronize_state remains untouched, just as Anthony suggested. We continue to need it before reading or writing of VCPU states that are also tracked by in-kernel KVM subsystems. Consequently, this patch removes many cpu_synchronize_state calls that are now redundant, just like remaining explicit register syncs. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-03-04KVM: Rework of guest debug state writingJan Kiszka1-0/+1
So far we synchronized any dirty VCPU state back into the kernel before updating the guest debug state. This was a tribute to a deficite in x86 kernels before 2.6.33. But as this is an arch-dependent issue, it is better handle in the x86 part of KVM and remove the writeback point for generic code. This also avoids overwriting the flushed state later on if user space decides to change some more registers before resuming the guest. We furthermore need to reinject guest exceptions via the appropriate mechanism. That is KVM_SET_GUEST_DEBUG for older kernels and KVM_SET_VCPU_EVENTS for recent ones. Using both mechanisms at the same time will cause state corruptions. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-02-23Fix mingw32 buildBlue Swirl1-0/+2
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2010-02-22kvm: consume internal signal with sigtimedwaitMarcelo Tosatti1-0/+1
Change the way the internal qemu signal, used for communication between iothread and vcpus, is handled. Block and consume it with sigtimedwait on the outer vcpu loop, which allows more precise timing control. Change from standard signal (SIGUSR1) to real-time one, so multiple signals are not collapsed. Set the signal number on KVM's in-kernel allowed sigmask. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-09kvm: move kvm to use memory notifiersMichael S. Tsirkin1-8/+0
remove direct kvm calls from exec.c, make kvm use memory notifiers framework instead. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2010-02-03kvm: Flush coalesced MMIO buffer periodlySheng Yang1-0/+1
The default action of coalesced MMIO is, cache the writing in buffer, until: 1. The buffer is full. 2. Or the exit to QEmu due to other reasons. But this would result in a very late writing in some condition. 1. The each time write to MMIO content is small. 2. The writing interval is big. 3. No need for input or accessing other devices frequently. This issue was observed in a experimental embbed system. The test image simply print "test" every 1 seconds. The output in QEmu meets expectation, but the output in KVM is delayed for seconds. Per Avi's suggestion, I hooked flushing coalesced MMIO buffer in VGA update handler. By this way, We don't need vcpu explicit exit to QEmu to handle this issue. Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2009-12-03kvm: x86: Add support for VCPU event statesJan Kiszka1-0/+1
This patch extends the qemu-kvm state sync logic with support for KVM_GET/SET_VCPU_EVENTS, giving access to yet missing exception, interrupt and NMI states. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-11-17kvm: Add arch reset handlerJan Kiszka1-0/+2
Will be required by succeeding changes. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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