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2007-10-13KVM: Emulate hlt in the kernelEddie Dong
By sleeping in the kernel when hlt is executed, we simplify the in-kernel guest interrupt path considerably. Signed-off-by: Gregory Haskins <ghaskins@novell.com> Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: In-kernel I/O APIC modelEddie Dong
This allows in-kernel host-side device drivers to raise guest interrupts without going to userspace. [avi: fix level-triggered interrupt redelivery on eoi] [avi: add missing #include] [avi: avoid redelivery of edge-triggered interrupt] [avi: implement polarity] [avi: don't deliver edge-triggered interrupts when unmasking] [avi: fix host oops on invalid guest access] Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Emulate local APIC in kernelEddie Dong
Because lightweight exits (exits which don't involve userspace) are many times faster than heavyweight exits, it makes sense to emulate high usage devices in the kernel. The local APIC is one such device, especially for Windows and for SMP, so we add an APIC model to kvm. It also allows in-kernel host-side drivers to inject interrupts without going through userspace. [compile fix on i386 from Jindrich Makovicka] Signed-off-by: Yaozu (Eddie) Dong <Eddie.Dong@intel.com> Signed-off-by: Qing He <qing.he@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Define and use cr8 access functionsEddie Dong
This patch is to wrap APIC base register and CR8 operation which can provide a unique API for user level irqchip and kernel irqchip. This is a preparation of merging lapic/ioapic patch. Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Add support for in-kernel PIC emulationEddie Dong
Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: VMX: Split segments reload in vmx_load_host_state()Laurent Vivier
vmx_load_host_state() bundles fs, gs, ldt, and tss reloading into one in the hope that it is infrequent. With smp guests, fs reloading is frequent due to fs being used by threads. Unbundle the reloads so reduce expensive gs reloads. Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: X86 emulator: fix 'push reg' writebackAvi Kivity
Pointed out by Rusty Russell. Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Support more memory slotsIzik Eidus
Needed for mapping memory at 4GB. Signed-off-by: Izik Eidus <izike@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: VMX: allow rmode_tss_base() to work with >2G of guest memoryIzik Eidus
Signed-off-by: Izik Eidus <izike@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: x86 emulator: implement 'push reg' (opcodes 0x50-0x57)Nitin A Kamble
Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: x86 emulator: Implement 'jmp rel short' instruction (opcode 0xeb)Nitin A Kamble
Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: x86 emulator: implement 'jmp rel' instruction (opcode 0xe9)Nitin A Kamble
Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: x86 emulator: implement 'and $imm, %{al|ax|eax}'Nitin A Kamble
Implement emulation of instruction and al imm8 (opcode 0x24) and ax/eax imm16/imm32 (opcode 0x25) Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Communicate cr8 changes to userspaceYang, Sheng
This allows running 64-bit Windows. Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Close minor race in signal handlingAvi Kivity
We need to check for signals inside the critical section, otherwise a signal can be sent which we will not notice. Also move the check before entry, so that if the signal happens before the first entry, we exit immediately instead of waiting for something to happen to the guest. Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Clean up kvm_setup_pio()Laurent Vivier
Split kvm_setup_pio() into two functions, one to setup in/out pio (kvm_emulate_pio()) and one to setup ins/outs pio (kvm_emulate_pio_string()). Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Cleanup string I/O instruction emulationLaurent Vivier
Both vmx and svm decode the I/O instructions, and both botch the job, requiring the instruction prefixes to be fetched in order to completely decode the instruction. So, if we see a string I/O instruction, use the x86 emulator to decode it, as it already has all the prefix decoding machinery. This patch defines ins/outs opcodes in x86_emulate.c and calls emulate_instruction() from io_interception() (svm.c) and from handle_io() (vmx.c). It removes all vmx/svm prefix instruction decoders (get_addr_size(), io_get_override(), io_address(), get_io_count()) Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Remove useless assignmentLaurent Vivier
Line 1809 of kvm_main.c is useless, value is overwritten in line 1815: 1809 now = min(count, PAGE_SIZE / size); 1810 1811 if (!down) 1812 in_page = PAGE_SIZE - offset_in_page(address); 1813 else 1814 in_page = offset_in_page(address) + size; 1815 now = min(count, (unsigned long)in_page / size); 1816 if (!now) { Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: VMX: Remove a duplicated ia32e mode vm entry controlLi, Xin B
Remove a duplicated ia32e mode VM Entry control definition and use the proper one. Signed-off-by: Xin Li <xin.b.li@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Use kmem_cache_free for kmem_cache_zalloc'ed objectsRusty Russell
We use kfree in svm.c and vmx.c, and this works, but it could break at any time. kfree() is supposed to match up with kmalloc(). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Add and use pr_unimpl for standard formatting of unimplemented featuresRusty Russell
All guest-invokable printks should be ratelimited to prevent malicious guests from flooding logs. This is a start. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Remove unneeded kvm_dev_open and kvm_dev_release functions.Rusty Russell
Devices don't need open or release functions. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Remove stat_set from debugfsRusty Russell
We shouldn't define stat_set on the debug attributes, since that will cause silent failure on writing: without a set argument, userspace will get -EACCESS. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Fix defined but not used warning in drivers/kvm/vmx.cGabriel C
move_msr_up() is used only on X86_64 and generates a warning on !X86_64 Signed-off-by: Gabriel Craciunescu <nix.or.die@googlemail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Remove redundant alloc_vmcs_cpu declarationRusty Russell
alloc_vmcs_cpu is already declared (static) above, no need to redeclare. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: SVM: Make set_msr_interception more reliableRusty Russell
set_msr_interception() is used by svm to set up which MSRs should be intercepted. It can only fail if someone has changed the code to try to intercept an MSR without updating the array of ranges. The return value is ignored anyway: it should just BUG() if it doesn't work. (A build-time failure would be better, but that's tricky). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Cleanup mark_page_dirtyRusty Russell
For some reason, mark_page_dirty open-codes __gfn_to_memslot(). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Don't assign vcpu->cr3 if it's invalid: check first, set lastRusty Russell
sSigned-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: VMX: Add cpu consistency checkYang, Sheng
All the physical CPUs on the board should support the same VMX feature set. Add check_processor_compatibility to kvm_arch_ops for the consistency check. Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: kvm_vm_ioctl_get_dirty_log restore "nothing dirty" optimizationRusty Russell
kvm_vm_ioctl_get_dirty_log scans bitmap to see it it's all zero, but doesn't use that information. Avi says: Looks like it was used to guard kvm_mmu_slot_remove_write_access(); optimizing the case where the guest just leaves the screen alone (which it usually does, especially in benchmarks). I'd rather reinstate that optimization. See 90cb0529dd230548a7f0d6b315997be854caea1b where the damage was done. It's pretty simple: if the bitmap is all zero, we don't need to do anything to clean it. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Use alignment properties of vcpu to simplify FPU opsRusty Russell
Now we use a kmem cache for allocating vcpus, we can get the 16-byte alignment required by fxsave & fxrstor instructions, and avoid manually aligning the buffer. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Use kmem cache for allocating vcpusRusty Russell
Avi wants the allocations of vcpus centralized again. The easiest way is to add a "size" arg to kvm_init_arch, and expose the thus-prepared cache to the modules. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Remove kvm_{read,write}_guest()Laurent Vivier
... in favor of the more general emulator_{read,write}_*. Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Change the emulator_{read,write,cmpxchg}_* functions to take a vcpuLaurent Vivier
... instead of a x86_emulate_ctxt, so that other callers can use it easily. Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: SVM: internal function name cleanupRusty Russell
Changes some svm.c internal function names: 1) io_adress -> io_address (de-germanify the spelling) 2) kvm_reput_irq -> reput_irq (it's not a generic kvm function) 3) kvm_do_inject_irq -> (it's not a generic kvm function) Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: SVM: de-containizationRusty Russell
container_of is wonderful, but not casting at all is better. This patch changes svm.c's internal functions to pass "struct vcpu_svm" instead of "struct kvm_vcpu" and using container_of. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Remove three magic numbersRusty Russell
There are several places where hardcoded numbers are used in place of the easily-available constant, which is poor form. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: VMX: pass vcpu_vmx internallyRusty Russell
container_of is wonderful, but not casting at all is better. This patch changes vmx.c's internal functions to pass "struct vcpu_vmx" instead of "struct kvm_vcpu" and using container_of. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: fx_init() needs preemption disabled while it plays with the FPU stateRusty Russell
Now that kvm generally runs with preemption enabled, we need to protect the fpu intialization sequence. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Convert vm lock to a mutexShaohua Li
This allows the kvm mmu to perform sleepy operations, such as memory allocation. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Use the scheduler preemption notifiers to make kvm preemptibleAvi Kivity
Current kvm disables preemption while the new virtualization registers are in use. This of course is not very good for latency sensitive workloads (one use of virtualization is to offload user interface and other latency insensitive stuff to a container, so that it is easier to analyze the remaining workload). This patch re-enables preemption for kvm; preemption is now only disabled when switching the registers in and out, and during the switch to guest mode and back. Contains fixes from Shaohua Li <shaohua.li@intel.com>. Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: add hypercall nr to kvm_runJeff Dike
Add the hypercall number to kvm_run and initialize it. This changes the ABI, but as this particular ABI was unusable before this no users are affected. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: VMX: Improve the method of writing vmcs controlYang, Sheng
Put cpu feature detecting part in hardware_setup, and stored the vmcs condition in global variable for further check. [glommer: fix for some i386-only machines not supporting CR8 load/store exiting] Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Dynamically allocate vcpusRusty Russell
This patch converts the vcpus array in "struct kvm" to a pointer array, and changes the "vcpu_create" and "vcpu_setup" hooks into one "vcpu_create" call which does the allocation and initialization of the vcpu (calling back into the kvm_vcpu_init core helper). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Remove arch specific components from the general codeGregory Haskins
struct kvm_vcpu has vmx-specific members; remove them to a private structure. Signed-off-by: Gregory Haskins <ghaskins@novell.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: load_pdptrs() cleanupsRusty Russell
load_pdptrs can be handed an invalid cr3, and it should not oops. This can happen because we injected #gp in set_cr3() after we set vcpu->cr3 to the invalid value, or from kvm_vcpu_ioctl_set_sregs(), or memory configuration changes after the guest did set_cr3(). We should also copy the pdpte array once, before checking and assigning, otherwise an SMP guest can potentially alter the values between the check and the set. Finally one nitpick: ret = 1 should be done as late as possible: this allows GCC to check for unset "ret" should the function change in future. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Remove dead code in the cmpxchg instruction emulationAurelien Jarno
The writeback fixes (02c03a326a5df825cc01de426f72e160db2b9538) let some dead code in the cmpxchg instruction emulation. Remove it. Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: VMX: Import some constants of vmcs from IA32 SDMYang, Sheng
This patch mainly imports some constants and rename two exist constants of vmcs according to IA32 SDM. It also adds two constants to indicate Lock bit and Enable bit in MSR_IA32_FEATURE_CONTROL, and replace the hardcode _5_ with these two bits. Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Move gfn_to_page out of kmap/unmap pairsShaohua Li
gfn_to_page might sleep with swap support. Move it out of the kmap calls. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Hoist kvm_mmu_reload() out of the critical sectionShaohua Li
vmx_cpu_run doesn't handle error correctly and kvm_mmu_reload might sleep with mutex changes, so I move it above. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
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