- 01 3月, 2010 10 次提交
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由 Marcelo Tosatti 提交于
Have a pointer to an allocated region inside struct kvm. [alex: fix ppc book 3s] Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Sheng Yang 提交于
Before enabling, execution of "rdtscp" in guest would result in #UD. Signed-off-by: NSheng Yang <sheng@linux.intel.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Sheng Yang 提交于
Sometime, we need to adjust some state in order to reflect guest CPUID setting, e.g. if we don't expose rdtscp to guest, we won't want to enable it on hardware. cpuid_update() is introduced for this purpose. Also export kvm_find_cpuid_entry() for later use. Signed-off-by: NSheng Yang <sheng@linux.intel.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Sheng Yang 提交于
It's no longer necessary. Signed-off-by: NSheng Yang <sheng@linux.intel.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
ept_update_paging_mode_cr4() accesses vcpu->arch.cr4 directly, which usually needs to be accessed via kvm_read_cr4(). In this case, we can't, since cr4 is in the process of being updated. Instead of adding inane comments, fold the function into its caller (vmx_set_cr4), so it can use the not-yet-committed cr4 directly. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
We make no use of cr4.pge if ept is enabled, but the guest does (to flush global mappings, as with vmap()), so give the guest ownership of this bit. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
Instead of specifying the bits which we want to trap on, specify the bits which we allow the guest to change transparently. This is safer wrt future changes to cr4. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
Some bits of cr4 can be owned by the guest on vmx, so when we read them, we copy them to the vcpu structure. In preparation for making the set of guest-owned bits dynamic, use helpers to access these bits so we don't need to know where the bit resides. No changes to svm since all bits are host-owned there. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
They have no place in common code. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Sheng Yang 提交于
We don't support these instructions, but guest can execute them even if the feature('monitor') haven't been exposed in CPUID. So we would trap and inject a #UD if guest try this way. Cc: stable@kernel.org Signed-off-by: NSheng Yang <sheng@linux.intel.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 03 12月, 2009 17 次提交
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由 Avi Kivity 提交于
update_transition_efer() masks out some efer bits when deciding whether to switch the msr during guest entry; for example, NX is emulated using the mmu so we don't need to disable it, and LMA/LME are handled by the hardware. However, with shared msrs, the comparison is made against a stale value; at the time of the guest switch we may be running with another guest's efer. Fix by deferring the mask/compare to the actual point of guest entry. Noted by Marcelo. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Sheng Yang 提交于
Otherwise would cause VMEntry failure when using ept=0 on unrestricted guest supported processors. Signed-off-by: NSheng Yang <sheng@linux.intel.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Jan Kiszka 提交于
This new IOCTL exports all yet user-invisible states related to exceptions, interrupts, and NMIs. Together with appropriate user space changes, this fixes sporadic problems of vmsave/restore, live migration and system reset. [avi: future-proof abi by adding a flags field] Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
These happen when we trap an exception when another exception is being delivered; we only expect these with MCEs and page faults. If something unexpected happens, things probably went south and we're better off reporting an internal error and freezing. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
Usually userspace will freeze the guest so we can inspect it, but some internal state is not available. Add extra data to internal error reporting so we can expose it to the debugger. Extra data is specific to the suberror. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
This variable is used to communicate between a caller and a callee; switch to a function argument instead. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Marcelo Tosatti 提交于
GUEST_CR3 is updated via kvm_set_cr3 whenever CR3 is modified from outside guest context. Similarly pdptrs are updated via load_pdptrs. Let kvm_set_cr3 perform the update, removing it from the vcpu_run fast path. Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Acked-by: NAcked-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
Instead of reloading syscall MSRs on every preemption, use the new shared msr infrastructure to reload them at the last possible minute (just before exit to userspace). Improves vcpu/idle/vcpu switches by about 2000 cycles (when EFER needs to be reloaded as well). [jan: fix slot index missing indirection] Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
Currently MSR_KERNEL_GS_BASE is saved and restored as part of the guest/host msr reloading. Since we wish to lazy-restore all the other msrs, save and reload MSR_KERNEL_GS_BASE explicitly instead of using the common code. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Eduardo Habkost 提交于
This should have no effect, it is just to make the code clearer. Signed-off-by: NEduardo Habkost <ehabkost@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Marcelo Tosatti 提交于
There's no kvm_run argument anymore. Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Zhai, Edwin 提交于
New NHM processors will support Pause-Loop Exiting by adding 2 VM-execution control fields: PLE_Gap - upper bound on the amount of time between two successive executions of PAUSE in a loop. PLE_Window - upper bound on the amount of time a guest is allowed to execute in a PAUSE loop If the time, between this execution of PAUSE and previous one, exceeds the PLE_Gap, processor consider this PAUSE belongs to a new loop. Otherwise, processor determins the the total execution time of this loop(since 1st PAUSE in this loop), and triggers a VM exit if total time exceeds the PLE_Window. * Refer SDM volume 3b section 21.6.13 & 22.1.3. Pause-Loop Exiting can be used to detect Lock-Holder Preemption, where one VP is sched-out after hold a spinlock, then other VPs for same lock are sched-in to waste the CPU time. Our tests indicate that most spinlocks are held for less than 212 cycles. Performance tests show that with 2X LP over-commitment we can get +2% perf improvement for kernel build(Even more perf gain with more LPs). Signed-off-by: NZhai Edwin <edwin.zhai@intel.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Jan Kiszka 提交于
Much of so far vendor-specific code for setting up guest debug can actually be handled by the generic code. This also fixes a minor deficit in the SVM part /wrt processing KVM_GUESTDBG_ENABLE. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Zachary Amsden 提交于
Both VMX and SVM require per-cpu memory allocation, which is done at module init time, for only online cpus. Backend was not allocating enough structure for all possible CPUs, so new CPUs coming online could not be hardware enabled. Signed-off-by: NZachary Amsden <zamsden@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Alexander Graf 提交于
X86 CPUs need to have some magic happening to enable the virtualization extensions on them. This magic can result in unpleasant results for users, like blocking other VMMs from working (vmx) or using invalid TLB entries (svm). Currently KVM activates virtualization when the respective kernel module is loaded. This blocks us from autoloading KVM modules without breaking other VMMs. To circumvent this problem at least a bit, this patch introduces on demand activation of virtualization. This means, that instead virtualization is enabled on creation of the first virtual machine and disabled on destruction of the last one. So using this, KVM can be easily autoloaded, while keeping other hypervisors usable. Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Mohammed Gamal 提交于
- Change returned handle_invalid_guest_state() to return relevant exit codes - Move triggering the emulation from vmx_vcpu_run() to vmx_handle_exit() - Return to userspace instead of repeatedly trying to emulate instructions that have already failed Signed-off-by: NMohammed Gamal <m.gamal005@gmail.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Avi Kivity 提交于
They're just copies of vcpu->run, which is readily accessible. Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 04 10月, 2009 1 次提交
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由 Marcelo Tosatti 提交于
It is possible that stale EPTP-tagged mappings are used, if a vcpu migrates to a different pcpu. Set KVM_REQ_TLB_FLUSH in vmx_vcpu_load, when switching pcpus, which will invalidate both VPID and EPT mappings on the next vm-entry. Cc: stable@kernel.org Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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- 10 9月, 2009 12 次提交
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由 Avi Kivity 提交于
Debug registers may only be accessed from cpl 0. Unfortunately, vmx will code to emulate the instruction even though it was issued from guest userspace, possibly leading to an unexpected trap later. Cc: stable@kernel.org Signed-off-by: NAvi Kivity <avi@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Gleb Natapov 提交于
No need to call it before each kvm_(set|get)_msr_common() Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Avi Kivity 提交于
Only reload debug register 6 if we're running with the guest's debug registers. Saves around 150 cycles from the guest lightweight exit path. dr6 contains a couple of bits that are updated on #DB, so intercept that unconditionally and update those bits then. Signed-off-by: NAvi Kivity <avi@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Gleb Natapov 提交于
Don't call adjust_vmx_controls() two times for the same control. It restores options that were dropped earlier. This loses us the cr8 exit control, which causes a massive performance regression Windows x64. Cc: stable@kernel.org Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Sheng Yang 提交于
QNX update WP bit when paging enabled, which is not covered yet. This one fix QNX boot with EPT. Cc: stable@kernel.org Signed-off-by: NSheng Yang <sheng@linux.intel.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
We set rflags.vm86 when virtualizing real mode to do through vm8086 mode; so we need to take it out again when reading rflags. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Roel Kluin 提交于
Check whether index is within bounds before grabbing the element. Signed-off-by: NRoel Kluin <roel.kluin@gmail.com> Cc: Avi Kivity <avi@redhat.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
Instead of calling vmx_get_segment() (which reads a whole bunch of vmcs fields), read only the cs selector which contains the cpl. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Joerg Roedel 提交于
If userspace knows that the kernel part supports 1GB pages it can enable the corresponding cpuid bit so that guests actually use GB pages. Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Jan Kiszka 提交于
Choose some allowed error values for the cases VMX returned ENOTSUPP so far as these values could be returned by the KVM_RUN IOCTL. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Sheng Yang 提交于
Now KVM allow guest to modify guest's physical address of EPT's identity mapping page. (change from v1, discard unnecessary check, change ioctl to accept parameter address rather than value) Signed-off-by: NSheng Yang <sheng@linux.intel.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Marcelo Tosatti 提交于
This allows use of the powerful ftrace infrastructure. See Documentation/trace/ for usage information. [avi, stephen: various build fixes] [sheng: fix control register breakage] Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NStephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: NSheng Yang <sheng@linux.intel.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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