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* KVM: SVM: Implement Flush-By-Asid featureJoerg Roedel2011-01-12
| | | | | | | | This patch adds the new flush-by-asid of upcoming AMD processors to the KVM-AMD module. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: SVM: Use svm_flush_tlb instead of force_new_asidJoerg Roedel2011-01-12
| | | | | | | | | | This patch replaces all calls to force_new_asid which are intended to flush the guest-tlb by the more appropriate function svm_flush_tlb. As a side-effect the force_new_asid function is removed. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: SVM: Remove flush_guest_tlb functionJoerg Roedel2011-01-12
| | | | | | | | This function is unused and there is svm_flush_tlb which does the same. So this function can be removed. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: MMU: retry #PF for softmmuXiao Guangrong2011-01-12
| | | | | | | | Retry #PF for softmmu only when the current vcpu has the same cr3 as the time when #PF occurs Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: MMU: fix accessed bit set on prefault pathXiao Guangrong2011-01-12
| | | | | | | Retry #PF is the speculative path, so don't set the accessed bit Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: MMU: rename 'no_apf' to 'prefault'Xiao Guangrong2011-01-12
| | | | | | | | It's the speculative path if 'no_apf = 1' and we will specially handle this speculative path in the later patch, so 'prefault' is better to fit the sense. Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: SVM: Add clean-bit for LBR stateJoerg Roedel2011-01-12
| | | | | | | | | This patch implements the clean-bit for all LBR related state. This includes the debugctl, br_from, br_to, last_excp_from, and last_excp_to msrs. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: SVM: Add clean-bit for CR2 registerJoerg Roedel2011-01-12
| | | | | | | | This patch implements the clean-bit for the cr2 register in the vmcb. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: SVM: Add clean-bit for Segements and CPLJoerg Roedel2011-01-12
| | | | | | | | This patch implements the clean-bit defined for the cs, ds, ss, an es segemnts and the current cpl saved in the vmcb. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: SVM: Add clean-bit for GDT and IDTJoerg Roedel2011-01-12
| | | | | | | | This patch implements the clean-bit for the base and limit of the gdt and idt in the vmcb. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: SVM: Add clean-bit for DR6 and DR7Joerg Roedel2011-01-12
| | | | | | | | This patch implements the clean-bit for the dr6 and dr7 debug registers in the vmcb. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: SVM: Add clean-bit for control registersJoerg Roedel2011-01-12
| | | | | | | | This patch implements the CRx clean-bit for the vmcb. This bit covers cr0, cr3, cr4, and efer. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: SVM: Add clean-bit for NPT stateJoerg Roedel2011-01-12
| | | | | | | | This patch implements the clean-bit for all nested paging related state in the vmcb. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: SVM: Add clean-bit for interrupt stateJoerg Roedel2011-01-12
| | | | | | | | | This patch implements the clean-bit for all interrupt related state in the vmcb. This corresponds to vmcb offset 0x60-0x67. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: SVM: Add clean-bit for the ASIDJoerg Roedel2011-01-12
| | | | | | | | This patch implements the clean-bit for the asid in the vmcb. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: SVM: Add clean-bit for IOPM_BASE and MSRPM_BASEJoerg Roedel2011-01-12
| | | | | | | | | | | This patch adds the clean bit for the physical addresses of the MSRPM and the IOPM. It does not need to be set in the code because the only place where these values are changed is the nested-svm vmrun and vmexit path. These functions already mark the complete VMCB as dirty. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: SVM: Add clean-bit for intercetps, tsc-offset and pause filter countJoerg Roedel2011-01-12
| | | | | | | | | | This patch adds the clean-bit for intercepts-vectors, the TSC offset and the pause-filter count to the appropriate places. The IO and MSR permission bitmaps are not subject to this bit. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: SVM: Add clean-bits infrastructure codeRoedel, Joerg2011-01-12
| | | | | | | | This patch adds the infrastructure for the implementation of the individual clean-bits. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: MMU: Avoid dropping accessed bit while removing write accessTakuya Yoshikawa2011-01-12
| | | | | | | | | | One more "KVM: MMU: Don't drop accessed bit while updating an spte." Sptes are accessed by both kvm and hardware. This patch uses update_spte() to fix the way of removing write access. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: VMX: Return 0 from a failed VMREADAvi Kivity2011-01-12
| | | | | | | | | If we execute VMREAD during reboot we'll just skip over it. Instead of returning garbage, return 0, which has a much smaller chance of confusing the code. Otherwise we risk a flood of debug printk()s which block the reboot process if a serial console or netconsole is enabled. Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: Don't spin on virt instruction faults during rebootAvi Kivity2011-01-12
| | | | | | | | | | | | | Since vmx blocks INIT signals, we disable virtualization extensions during reboot. This leads to virtualization instructions faulting; we trap these faults and spin while the reboot continues. Unfortunately spinning on a non-preemptible kernel may block a task that reboot depends on; this causes the reboot to hang. Fix by skipping over the instruction and hoping for the best. Signed-off-by: Avi Kivity <avi@redhat.com>
* KVM: SVM: Use get_host_vmcb function in svm_get_msr for TSCJoerg Roedel2011-01-12
| | | | | | | | | This patch replaces the open-coded vmcb-selection for the TSC calculation with the new get_host_vmcb helper function introduced in this patchset. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: SVM: Add manipulation functions for misc interceptsJoerg Roedel2011-01-12
| | | | | | | | | This patch wraps changes to the misc 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>
* KVM: SVM: Add manipulation functions for exception interceptsJoerg Roedel2011-01-12
| | | | | | | | | This patch wraps changes to the exception 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>
* KVM: SVM: Add manipulation functions for DRx interceptsJoerg Roedel2011-01-12
| | | | | | | | | 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>
* KVM: SVM: Add manipulation functions for CRx interceptsRoedel, Joerg2011-01-12
| | | | | | | | | 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: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: SVM: Add function to recalculate intercept masksJoerg Roedel2011-01-12
| | | | | | | | | 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: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: X86: Don't report L2 emulation failures to user-spaceJoerg Roedel2011-01-12
| | | | | | | | | | | | | | 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: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: SVM: Make Use of the generic guest-mode functionsJoerg Roedel2011-01-12
| | | | | | | | This patch replaces the is_nested logic in the SVM module with the generic notion of guest-mode. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: X86: Introduce generic guest-mode representationJoerg Roedel2011-01-12
| | | | | | | | | | 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: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: Pull extra page fault information into struct x86_exceptionAvi Kivity2011-01-12
| | | | | | | | | | | | | | | 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: Joerg Roedel <joerg.roedel@amd.com> Tested-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: Push struct x86_exception into walk_addr()Avi Kivity2011-01-12
| | | | | Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: Push struct x86_exception info the various gva_to_gpa variantsAvi Kivity2011-01-12
| | | | | Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: x86 emulator: simplify exception generationAvi Kivity2011-01-12
| | | | | | | | Immediately after we generate an exception, we want a X86EMUL_PROPAGATE_FAULT constant, so return it from the generation functions. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: x86 emulator: tighen up ->read_std() and ->write_std() error checksAvi Kivity2011-01-12
| | | | | | | | Instead of checking for X86EMUL_PROPAGATE_FAULT, check for any error, making the callers more reliable. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: x86 emulator: drop dead pf injection in emulate_popf()Avi Kivity2011-01-12
| | | | | | | If rc == X86EMUL_PROPAGATE_FAULT, we would have returned earlier. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: x86 emulator: make emulator memory callbacks return full exceptionAvi Kivity2011-01-12
| | | | | | | This way, they can return #GP, not just #PF. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: x86 emulator: introduce struct x86_exception to communicate faultsAvi Kivity2011-01-12
| | | | | | | | Introduce a structure that can contain an exception to be passed back to main kvm code. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: MMU: delay flush all tlbs on sync_page pathXiao Guangrong2011-01-12
| | | | | | | | | | 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: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: MMU: abstract invalid guest pte mappingXiao Guangrong2011-01-12
| | | | | | | Introduce a common function to map invalid gpte Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: MMU: remove 'clear_unsync' parameterXiao Guangrong2011-01-12
| | | | | | | Remove it since we can judge it by using sp->unsync Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: MMU: rename 'reset_host_protection' to 'host_writable'Lai Jiangshan2011-01-12
| | | | | | | | Rename it to fit its sense better Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: MMU: don't drop spte if overwrite it from W to ROXiao Guangrong2011-01-12
| | | | | | | | | 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: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: MMU: fix forgot flush tlbs on sync_page pathXiao Guangrong2011-01-12
| | | | | | | | | | | | | | | | | 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: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* KVM: PPC: Fix compile warningAlexander Graf2011-01-12
| | | | | | | | | | | | | | | 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: Avi Kivity <avi@redhat.com>
* KVM: Add instruction-set-specific exit qualifications to kvm_exit traceAvi Kivity2011-01-12
| | | | | | | | | | | 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 <avi@redhat.com>
* KVM: Record instruction set in kvm_exit tracepointAvi Kivity2011-01-12
| | | | | | | 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: Avi Kivity <avi@redhat.com>
* KVM: fast-path msi injection with irqfdMichael S. Tsirkin2011-01-12
| | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* KVM: VMX: Fold __vmx_vcpu_run() into vmx_vcpu_run()Avi Kivity2011-01-12
| | | | | | | | | 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 <avi@redhat.com>
* KVM: x86 emulator: do not perform address calculations on linear addressesAvi Kivity2011-01-12
| | | | | | | | 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: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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