- 12 Jan, 2011 40 commits
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Michael S. Tsirkin authored
Store irq routing table pointer in the irqfd object, and use that to inject MSI directly without bouncing out to a kernel thread. While we touch this structure, rearrange irqfd fields to make fastpath better packed for better cache utilization. This also adds some comments about locking rules and rcu usage in code. Some notes on the design: - Use pointer into the rt instead of copying an entry, to make it possible to use rcu, thus side-stepping locking complexities. We also save some memory this way. - Old workqueue code is still used for level irqs. I don't think we DTRT with level anyway, however, it seems easier to keep the code around as it has been thought through and debugged, and fix level later than rip out and re-instate it later. Signed-off-by:
Michael S. Tsirkin <mst@redhat.com> Acked-by:
Marcelo Tosatti <mtosatti@redhat.com> Acked-by:
Gregory Haskins <ghaskins@novell.com> Signed-off-by:
Avi Kivity <avi@redhat.com>
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Avi Kivity authored
cea15c2 ("KVM: Move KVM context switch into own function") split vmx_vcpu_run() to prevent multiple copies of the context switch from being generated (causing problems due to a label). This patch folds them back together again and adds the __noclone attribute to prevent the label from being duplicated. Signed-off-by: -
Avi Kivity authored
Linear addresses are supposed to already have segment checks performed on them; if we play with these addresses the checks become invalid. Signed-off-by:
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Avi Kivity authored
Currently the x86 emulator converts the segment register associated with an operand into a segment base which is added into the operand address. This loss of information results in us not doing segment limit checks properly. Replace struct operand's addr.mem field by a segmented_address structure which holds both the effetive address and segment. This will allow us to do the limit check at the point of access. Signed-off-by:
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Avi Kivity authored
Failed emulation is reported via a tracepoint; the cmps printk is pointless. Signed-off-by:
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Avi Kivity authored
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Shane Wang authored
Inform user to either disable TXT in the BIOS or do TXT launch with tboot before enabling KVM since some BIOSes do not set FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX bit when TXT is enabled. Signed-off-by:
Shane Wang <shane.wang@intel.com> Signed-off-by:
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Takuya Yoshikawa authored
The naming convension of hardware_[dis|en]able family is little bit confusing because only hardware_[dis|en]able_all are using _nolock suffix. Renaming current hardware_[dis|en]able() to *_nolock() and using hardware_[dis|en]able() as wrapper functions which take kvm_lock for them reduces extra confusion. Signed-off-by:
Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by:
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Takuya Yoshikawa authored
In kvm_cpu_hotplug(), only CPU_STARTING case is protected by kvm_lock. This patch adds missing protection for CPU_DYING case. Signed-off-by:
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Xiao Guangrong authored
If reserved bit is set, we need inject the #PF with PFEC.RSVD=1, but shadow_notrap_nonpresent_pte injects #PF with PFEC.RSVD=0 only Signed-off-by:
Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by:
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Jan Kiszka authored
Adds API documentation for KVM_[DE]ASSIGN_PCI_DEVICE, KVM_[DE]ASSIGN_DEV_IRQ, KVM_SET_GSI_ROUTING, KVM_ASSIGN_SET_MSIX_NR, and KVM_ASSIGN_SET_MSIX_ENTRY. Acked-by:
Alex Williamson <alex.williamson@redhat.com> Acked-by:
Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by:
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Jan Kiszka authored
Any arch not supporting device assigment will also not build assigned-dev.c. So testing for KVM_CAP_DEVICE_DEASSIGNMENT is pointless. KVM_CAP_ASSIGN_DEV_IRQ is unconditinally set. Moreover, add a default case for dispatching the ioctl. Acked-by:
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Jan Kiszka authored
The guest may change states that pci_reset_function does not touch. So we better save/restore the assigned device across guest usage. Acked-by:
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Jan Kiszka authored
Cosmetic change, but it helps to correlate IRQs with PCI devices. Acked-by:
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Jan Kiszka authored
This improves the IRQ forwarding for assigned devices: By using the kernel's threaded IRQ scheme, we can get rid of the latency-prone work queue and simplify the code in the same run. Moreover, we no longer have to hold assigned_dev_lock while raising the guest IRQ, which can be a lenghty operation as we may have to iterate over all VCPUs. The lock is now only used for synchronizing masking vs. unmasking of INTx-type IRQs, thus is renames to intx_lock. Acked-by:
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Jan Kiszka authored
When we deassign a guest IRQ, clear the potentially asserted guest line. There might be no chance for the guest to do this, specifically if we switch from INTx to MSI mode. Acked-by:
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Avi Kivity authored
This allows Linux to mask cpuid bits if, for example, nx is enabled on only some cpus. Signed-off-by:
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Avi Kivity authored
Instead of querying cpuid directly, use the Linux accessors (boot_cpu_has, etc.). This allows the things like the clearcpuid kernel command line to work (when it's fixed wrt scattered cpuid bits). Acked-by:
Joerg Roedel <joerg.roedel@amd.com> Signed-off-by:
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Xiao Guangrong authored
If apf is generated in L2 guest and is completed in L1 guest, it will prefault this apf in L1 guest's mmu context. Signed-off-by:
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Xiao Guangrong authored
Let's support apf for nonpaing guest Signed-off-by:
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Xiao Guangrong authored
If CR0.PG is changed, the page fault cann't be avoid when the prefault address is accessed later And it also fix a bug: it can retry a page enabled #PF in page disabled context if mmu is shadow page This idear is from Gleb Natapov Signed-off-by:
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Xiao Guangrong authored
Add AUDIT_POST_SYNC audit for long mode shadow page Signed-off-by:
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Jan Kiszka authored
IA64 support forces us to abstract the allocation of the kvm structure. But instead of mixing this up with arch-specific initialization and doing the same on destruction, split both steps. This allows to move generic destruction calls into generic code. It also fixes error clean-up on failures of kvm_create_vm for IA64. Signed-off-by:
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Tracey Dent authored
Changed makefile to use the ccflags-y option instead of EXTRA_CFLAGS. Signed-off-by:
Tracey Dent <tdent48227@gmail.com> Signed-off-by:
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Xiao Guangrong authored
Remove the declaration of kvm_mmu_set_base_ptes() Signed-off-by:
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Jan Kiszka authored
Signed-off-by:
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Avi Kivity authored
While not mandated by the spec, Linux relies on NMI being blocked by an IF-enabling STI. VMX also refuses to enter a guest in this state, at least on some implementations. Disallow NMI while blocked by STI by checking for the condition, and requesting an interrupt window exit if it occurs. Signed-off-by:
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Xiao Guangrong authored
In kvm_async_pf_wakeup_all(), we add a dummy apf to vcpu->async_pf.done without holding vcpu->async_pf.lock, it will break if we are handling apfs at this time. Also use 'list_empty_careful()' instead of 'list_empty()' Signed-off-by:
Gleb Natapov <gleb@redhat.com> Signed-off-by:
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Xiao Guangrong authored
If it's no need to inject async #PF to PV guest we can handle more completed apfs at one time, so we can retry guest #PF as early as possible Signed-off-by:
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Xiao Guangrong authored
In current code, it checks async pf completion out of the wait context, like this: if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE && !vcpu->arch.apf.halted) r = vcpu_enter_guest(vcpu); else { ...... kvm_vcpu_block(vcpu) ^- waiting until 'async_pf.done' is not empty } kvm_check_async_pf_completion(vcpu) ^- delete list from async_pf.done So, if we check aysnc pf completion first, it can be blocked at kvm_vcpu_block Fixed by mark the vcpu is unhalted in kvm_check_async_pf_completion() path Signed-off-by: -
Xiao Guangrong authored
Don't search later slots if the slot is empty Acked-by:
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Xiao Guangrong authored
Use 'DECLARE_EVENT_CLASS' to cleanup async_pf tracepoints Acked-by:
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Xiao Guangrong authored
Tracing 'async' and *pfn is useless, since 'async' is always true, and '*pfn' is always "fault_pfn' We can trace 'gva' and 'gfn' instead, it can help us to see the life-cycle of an async_pf Signed-off-by:
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Takuya Yoshikawa authored
Let's use newly introduced vzalloc(). Signed-off-by:
Jesper Juhl <jj@chaosbits.net> Signed-off-by:
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Gleb Natapov authored
Currently the exit is unhandled, so guest halts with error if it tries to execute INVD instruction. Call into emulator when INVD instruction is executed by a guest instead. This instruction is not needed by ordinary guests, but firmware (like OpenBIOS) use it and fail. Signed-off-by:
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Jan Kiszka authored
Micro optimization to avoid calling wbinvd twice on the CPU that has to emulate it. As we might be preempted between smp_call_function_many and the local wbinvd, the cache might be filled again so that real work could be done uselessly. Signed-off-by:
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Heiko Carstens authored
Fixes this: CC arch/s390/kvm/../../../virt/kvm/kvm_main.o arch/s390/kvm/../../../virt/kvm/kvm_main.c: In function 'kvm_dev_ioctl_create_vm': arch/s390/kvm/../../../virt/kvm/kvm_main.c:1828:10: warning: unused variable 'r' Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
Fixes this: CC arch/s390/kvm/../../../virt/kvm/kvm_main.o arch/s390/kvm/../../../virt/kvm/kvm_main.c: In function 'kvm_clear_guest_page': arch/s390/kvm/../../../virt/kvm/kvm_main.c:1224:2: warning: passing argument 3 of 'kvm_write_guest_page' makes pointer from integer without a cast arch/s390/kvm/../../../virt/kvm/kvm_main.c:1185:5: note: expected 'const void *' but argument is of type 'long unsigned int' Signed-off-by:
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Takuya Yoshikawa authored
Currently we are using vmalloc() for all dirty bitmaps even if they are small enough, say less than K bytes. We use kmalloc() if dirty bitmap size is less than or equal to PAGE_SIZE so that we can avoid vmalloc area usage for VGA. This will also make the logging start/stop faster. Signed-off-by:
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Takuya Yoshikawa authored
Currently x86's kvm_vm_ioctl_get_dirty_log() needs to allocate a bitmap by vmalloc() which will be used in the next logging and this has been causing bad effect to VGA and live-migration: vmalloc() consumes extra systime, triggers tlb flush, etc. This patch resolves this issue by pre-allocating one more bitmap and switching between two bitmaps during dirty logging. Performance improvement: I measured performance for the case of VGA update by trace-cmd. The result was 1.5 times faster than the original one. In the case of live migration, the improvement ratio depends on the workload and the guest memory size. In general, the larger the memory size is the more benefits we get. Note: This does not change other architectures's logic but the allocation size becomes twice. This will increase the actual memory consumption only when the new size changes the number of pages allocated by vmalloc(). Signed-off-by:
Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp> Signed-off-by:
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