- 12 Jan, 2011 40 commits
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Joerg Roedel authored
This patch wraps changes to the DRx intercepts of SVM into seperate functions to abstract nested-svm better and prepare the implementation of the vmcb-clean-bits feature. Signed-off-by:
Joerg Roedel <joerg.roedel@amd.com> Signed-off-by:
Marcelo Tosatti <mtosatti@redhat.com>
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Roedel, Joerg authored
This patch wraps changes to the CRx intercepts of SVM into seperate functions to abstract nested-svm better and prepare the implementation of the vmcb-clean-bits feature. Signed-off-by:
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Joerg Roedel authored
This patch adds a function to recalculate the effective intercepts masks when the vcpu is in guest-mode and either the host or the guest intercept masks change. Signed-off-by:
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Joerg Roedel authored
This patch prevents that emulation failures which result from emulating an instruction for an L2-Guest results in being reported to userspace. Without this patch a malicious L2-Guest would be able to kill the L1 by triggering a race-condition between an vmexit and the instruction emulator. With this patch the L2 will most likely only kill itself in this situation. Signed-off-by:
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Joerg Roedel authored
This patch replaces the is_nested logic in the SVM module with the generic notion of guest-mode. Signed-off-by:
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Joerg Roedel authored
This patch introduces a generic representation of guest-mode fpr a vcpu. This currently only exists in the SVM code. Having this representation generic will help making the non-svm code aware of nesting when this is necessary. Signed-off-by:
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Avi Kivity authored
Currently page fault cr2 and nesting infomation are carried outside the fault data structure. Instead they are placed in the vcpu struct, which results in confusion as global variables are manipulated instead of passing parameters. Fix this issue by adding address and nested fields to struct x86_exception, so this struct can carry all information associated with a fault. Signed-off-by:
Avi Kivity <avi@redhat.com> Tested-by:
Gleb Natapov <gleb@redhat.com> Signed-off-by:
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Avi Kivity authored
Signed-off-by:
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Avi Kivity authored
Signed-off-by:
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Avi Kivity authored
Immediately after we generate an exception, we want a X86EMUL_PROPAGATE_FAULT constant, so return it from the generation functions. Signed-off-by:
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Avi Kivity authored
Instead of checking for X86EMUL_PROPAGATE_FAULT, check for any error, making the callers more reliable. Signed-off-by:
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Avi Kivity authored
If rc == X86EMUL_PROPAGATE_FAULT, we would have returned earlier. Signed-off-by:
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Avi Kivity authored
This way, they can return #GP, not just #PF. Signed-off-by:
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Avi Kivity authored
Introduce a structure that can contain an exception to be passed back to main kvm code. Signed-off-by:
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Xiao Guangrong authored
Quote from Avi: | I don't think we need to flush immediately; set a "tlb dirty" bit somewhere | that is cleareded when we flush the tlb. kvm_mmu_notifier_invalidate_page() | can consult the bit and force a flush if set. Signed-off-by:
Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by:
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Xiao Guangrong authored
Introduce a common function to map invalid gpte Signed-off-by:
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Xiao Guangrong authored
Remove it since we can judge it by using sp->unsync Signed-off-by:
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Lai Jiangshan authored
Rename it to fit its sense better Signed-off-by:
Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by:
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Xiao Guangrong authored
We just need flush tlb if overwrite a writable spte with a read-only one. And we should move this operation to set_spte() for sync_page path Signed-off-by:
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Xiao Guangrong authored
We should flush all tlbs after drop spte on sync_page path since Quote from Avi: | sync_page | drop_spte | kvm_mmu_notifier_invalidate_page | kvm_unmap_rmapp | spte doesn't exist -> no flush | page is freed | guest can write into freed page? KVM-Stable-Tag. Signed-off-by:
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Alexander Graf authored
KVM compilation fails with the following warning: include/linux/kvm_host.h: In function 'kvm_irq_routing_update': include/linux/kvm_host.h:679:2: error: 'struct kvm' has no member named 'irq_routing' That function is only used and reasonable to have on systems that implement an in-kernel interrupt chip. PPC doesn't. Fix by #ifdef'ing it out when no irqchip is available. Signed-off-by:
Alexander Graf <agraf@suse.de> Signed-off-by:
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Avi Kivity authored
The exit reason alone is insufficient to understand exactly why an exit occured; add ISA-specific trace parameters for additional information. Because fetching these parameters is expensive on vmx, and because these parameters are fetched even if tracing is disabled, we fetch the parameters via a callback instead of as traditional trace arguments. Signed-off-by: -
Avi Kivity authored
exit_reason's meaning depend on the instruction set; record it so a trace taken on one machine can be interpreted on another. Signed-off-by: -
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:
Gregory Haskins <ghaskins@novell.com> Signed-off-by:
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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
Signed-off-by:
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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:
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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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