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path: root/drivers/kvm
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2007-10-13KVM: Skip pio instruction when it is emulated, not executedAvi Kivity1-2/+5
If we defer updating rip until pio instructions are executed, we have a problem with reset: a pio reset updates rip, and when the instruction completes we skip the emulated instruction, pointing rip somewhere completely unrelated. Fix by updating rip when we see decode the instruction, not after emulation. Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: x86 emulator: popfNitin A Kamble1-1/+4
Implement emulation of instruction: popf opcode: 0x9d Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: x86 emulator: fix src, dst value initializationNitin A Kamble1-0/+2
Some operand fetches are less than the machine word size and can result in stale bits if used together with operands of different sizes. Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: x86 emulator: jmp absNitin A Kamble1-0/+6
Implement emulation of instruction: jump absolute r/m opcode: 0xff /4 Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: x86 emulator: leaNitin A Kamble1-1/+4
Implement emulation of instruction lea r16/r32, m opcode: 0x8d: Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: X86 emulator: jump conditional shortNitin A Kamble1-2/+13
Implement emulation of more jump conditional instructions jcc shortrel opcodes: 0x70 - 0x7f Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: x86 emulator: imlpement jump conditional relativeNitin A Kamble1-1/+60
Implement emulation of instruction: jump conditional rel opcodes: 0x0f 0x80 - 0x0f 0x8f Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: x86 emulator: sort opcodes into ascending orderNitin A Kamble1-50/+49
Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Improve emulation failure reportingAvi Kivity4-10/+11
Report failed opcodes from all locations. Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: x86 emulator: pushfNitin A Kamble1-2/+9
Implement emulation of instruction pushf opcode: 0x9c Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: x86 emulator: call nearNitin A Kamble1-1/+21
Implement emulation of instruction opcode: 0xe8 call (near) Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: x86 emulator: push imm8Nitin A Kamble1-3/+14
Implement the instruction push imm8 opcode: 0x6a Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: VMX: Fix exit qualification width on i386He, Qing1-6/+6
According to Intel Software Developer's Manual, Vol. 3B, Appendix H.4.2, exit qualification should be of natural width. However, current code uses u64 as the data type for this register, which occasionally introduces invalid value to VMExit handling logics. This patch fixes this bug. I have tested Windows and Linux guest on i386 host, and they can boot successfully with this patch. Signed-off-by: Qing He <qing.he@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Move main vcpu loop into subarch independent codeAvi Kivity4-217/+187
This simplifies adding new code as well as reducing overall code size. Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: VMX: Move vm entry failure handling to the exit handlerAvi Kivity1-9/+10
This will help moving the main loop to subarch independent code. Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: MMU: Don't do GFP_NOWAIT allocationsAvi Kivity1-24/+10
Before preempt notifiers, kvm needed to allocate memory with GFP_NOWAIT so as not to have to enable preemption and take a heavyweight exit. On oom, we'd fall back to a GFP_KERNEL allocation. With preemption notifiers, we can do a GFP_KERNEL allocation, and perform the heavyweight exit only if the kernel decides to put us to sleep. Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Rename kvm_arch_ops to kvm_x86_opsChristian Ehrhardt7-96/+96
This patch just renames the current (misnamed) _arch namings to _x86 to ensure better readability when a real arch layer takes place. Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Simplify memory allocationLaurent Vivier2-37/+3
The mutex->splinlock convertion alllows us to make some code simplifications. As we can keep the lock longer, we don't have to release it and then have to check if the environment has not been modified before re-taking it. We can remove kvm->busy and kvm->memory_config_version. Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Hoist SVM's get_cs_db_l_bits into core code.Rusty Russell3-9/+12
SVM gets the DB and L bits for the cs by decoding the segment. This is in fact the completely generic code, so hoist it for kvm-lite to use. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Keep control regs in syncRusty Russell1-4/+4
We don't update the vcpu control registers in various places. We should do so. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Clean up unloved invlpg emulationRusty Russell3-17/+3
invlpg shouldn't fetch the "src" address, since it may not be valid, however SVM's "solution" which neuters emulation of all group 7 instruction is horrible and breaks kvm-lite. The simplest fix is to put a special check in for invlpg. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Remove the unused invlpg member of struct kvm_arch_ops.Rusty Russell2-7/+0
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Set the ET flag in CR0 after initializing FXAmit Shah1-0/+1
This was missed when moving stuff around in fbc4f2e Fixes Solaris guests and bug #1773613 Signed-off-by: Amit Shah <amit.shah@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: enable in-kernel APIC INIT/SIPI handlingHe, Qing5-16/+85
This patch enables INIT/SIPI handling using in-kernel APIC by introducing a ->mp_state field to emulate the SMP state transition. [avi: remove smp_processor_id() warning] Signed-off-by: Qing He <qing.he@intel.com> Signed-off-by: Xin Li <xin.b.li@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: round robin for APIC lowest priority delivery modeHe, Qing2-5/+29
Signed-off-by: Qing He <qing.he@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: deliver PIC interrupt only to vcpu0Qing He3-5/+28
This patch changes the PIC interrupts delivery. Now it is only delivered to vcpu0 when either condition is met (on vcpu0): 1. local APIC is hardware disabled 2. LVT0 is unmasked and configured to delivery mode ExtInt It fixes the 2x faster wall clock on x86_64 and SMP i386 Linux guests Signed-off-by: Eddie (Yaozu) 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: disable tpr/cr8 sync when in-kernel APIC is usedHe, Qing1-1/+2
Signed-off-by: Qing He <qing.he@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Migrate lapic hrtimer when vcpu moves to another cpuEddie Dong4-1/+19
This reduces overhead by accessing cachelines from the wrong node, as well as simplifying locking. [Qing: fix for inactive or expired one-shot timer] 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: Keep track of missed timer irq injectionsEddie Dong6-25/+69
APIC timer IRQ is set every time when a certain period expires at host time, but the guest may be descheduled at that time and thus the irq be overwritten by later fire. This patch keep track of firing irq numbers and decrease only when the IRQ is injected to guest or buffered in APIC. 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: VMX: Use shadow TPR/cr8 for 64-bits guestsYang, Sheng4-4/+81
This patch enables TPR shadow of VMX on CR8 access. 64bit Windows using CR8 access TPR frequently. The TPR shadow can improve the performance of access TPR by not causing vmexit. Signed-off-by: Sheng Yang <sheng.yang@intel.com> 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: pending irq save/restoreEddie Dong4-3/+54
Add in kernel irqchip save/restore support for pending vectors. [avi: fix compile warning on i386] [avi: remove printk] 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: in-kernel LAPIC save and restore supportEddie Dong3-0/+60
This patch adds a new vcpu-based IOCTL to save and restore the local apic registers for a single vcpu. The kernel only copies the apic page as a whole, extraction of registers is left to userspace side. On restore, the APIC timer is restarted from the initial count, this introduces a little delay, but works fine. 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: in-kernel IOAPIC save and restore supportHe, Qing2-1/+11
This patch adds support for in-kernel ioapic save and restore (to and from userspace). It uses the same get/set_irqchip ioctl as in-kernel PIC. Signed-off-by: Qing He <qing.he@intel.com> Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Bypass irq_pending get/set when using in kernel irqchipHe, Qing1-8/+14
vcpu->irq_pending is saved in get/set_sreg IOCTL, but when in-kernel local APIC is used, doing this may occasionally overwrite vcpu->apic to an invalid value, as in the vm restore path. Signed-off-by: Qing He <qing.he@intel.com>
2007-10-13KVM: Add get/set irqchip ioctls for in-kernel PIC live migration supportHe, Qing3-0/+88
This patch adds two new ioctls to dump and write kernel irqchips for save/restore and live migration. PIC s/r and l/m is implemented in this patch. 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: Protect in-kernel pio using kvm->lockEddie Dong1-0/+6
pio operation and IRQ_LINE kvm_vm_ioctl is not kvm->lock protected. Add lock to same with IOAPIC MMIO operations. Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Emulate hlt in the kernelEddie Dong6-11/+56
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 Dong6-8/+458
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 Dong8-31/+1065
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 Dong4-17/+40
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 Dong8-24/+751
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 Vivier1-10/+12
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 Kivity1-1/+0
Pointed out by Rusty Russell. Signed-off-by: Avi Kivity <avi@qumranet.com>
2007-10-13KVM: Support more memory slotsIzik Eidus1-1/+1
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 Eidus1-1/+1
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 Kamble1-1/+15
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 Kamble1-1/+2
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 Kamble1-2/+14
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 Kamble1-2/+19
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, Sheng1-1/+2
This allows running 64-bit Windows. Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
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