- 31 Dec, 2008 40 commits
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Hollis Blanchard authored
This is used in a couple places in KVM, but isn't KVM-specific. However, this patch doesn't modify other in-kernel emulation code: - xmon uses a direct copy of ppc_opc.c from binutils - emulate_instruction() doesn't need it because it can use a series of mask tests. Signed-off-by:
Hollis Blanchard <hollisb@us.ibm.com> Acked-by:
Paul Mackerras <paulus@samba.org> Signed-off-by:
Avi Kivity <avi@redhat.com>
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Hollis Blanchard authored
This introduces a set of core-provided hooks. For 440, some of these are implemented by booke.c, with the rest in (the new) 44x.c. Note that these hooks are link-time, not run-time. Since it is not possible to build a single kernel for both e500 and 440 (for example), using function pointers would only add overhead. Signed-off-by:
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Hollis Blanchard authored
The division was somewhat artificial and cumbersome, and had no functional benefit anyways: we can only guests built for the real host processor. Signed-off-by:
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Hollis Blanchard authored
This will ease ports to other cores. Also remove unused "struct kvm_tlb" while we're at it. Signed-off-by:
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Hollis Blanchard authored
This will make it easier to provide implementations for other cores. Signed-off-by:
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Izik Eidus authored
Some areas of kvm x86 mmu are using gfn offset inside a slot without unaliasing the gfn first. This patch makes sure that the gfn will be unaliased and add gfn_to_memslot_unaliased() to save the calculating of the gfn unaliasing in case we have it unaliased already. Signed-off-by:
Izik Eidus <ieidus@redhat.com> Acked-by:
Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by:
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Sheng Yang authored
Ideally, every assigned device should in a clear condition before and after assignment, so that the former state of device won't affect later work. Some devices provide a mechanism named Function Level Reset, which is defined in PCI/PCI-e document. We should execute it before and after device assignment. (But sadly, the feature is new, and most device on the market now don't support it. We are considering using D0/D3hot transmit to emulate it later, but not that elegant and reliable as FLR itself.) [Update: Reminded by Xiantao, execute FLR after we ensure that the device can be assigned to the guest.] Signed-off-by:
Sheng Yang <sheng@linux.intel.com> Signed-off-by:
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Xiantao Zhang authored
Remove the lock protection for kvm halt logic, otherwise, once other vcpus want to acquire the lock, and they have to wait all vcpus are waken up from halt. Signed-off-by:
Xiantao Zhang <xiantao.zhang@intel.com> Signed-off-by:
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Xiantao Zhang authored
1. Increase the size of data area to 64M 2. Support more vcpus and memory, 128 vcpus and 256G memory are supported for guests. 3. Add the boundary check for memory and vcpu allocation. With this patch, kvm guest's data area looks as follow: * * +----------------------+ ------- KVM_VM_DATA_SIZE * | vcpu[n]'s data | | ___________________KVM_STK_OFFSET * | | | / | * | .......... | | /vcpu's struct&stack | * | .......... | | /---------------------|---- 0 * | vcpu[5]'s data | | / vpd | * | vcpu[4]'s data | |/-----------------------| * | vcpu[3]'s data | / vtlb | * | vcpu[2]'s data | /|------------------------| * | vcpu[1]'s data |/ | vhpt | * | vcpu[0]'s data |____________________________| * +----------------------+ | * | memory dirty log | | * +----------------------+ | * | vm's data struct | | * +----------------------+ | * | | | * | | | * | | | * | | | * | | | * | | | * | | | * | vm's p2m table | | * | | | * | | | * | | | | * vm's data->| | | | * +----------------------+ ------- 0 * To support large memory, needs to increase the size of p2m. * To support more vcpus, needs to ensure it has enough space to * hold vcpus' data. */ Signed-off-by:
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Guillaume Thouvenin authored
If emulate_invalid_guest_state is enabled, the emulator is called when guest state is invalid. Until now, we reported an mmio failure when emulate_instruction() returned EMULATE_DO_MMIO. This patch adds the case where emulate_instruction() failed and an MMIO emulation is needed. Signed-off-by:
Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net> Signed-off-by:
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Guillaume Thouvenin authored
If we call the emulator we shouldn't call skip_emulated_instruction() in the first place, since the emulator already computes the next rip for us. Thus we move ->skip_emulated_instruction() out of kvm_emulate_pio() and into handle_io() (and the svm equivalent). We also replaced "return 0" by "break" in the "do_io:" case because now the shadow register state needs to be committed. Otherwise eip will never be updated. Signed-off-by:
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Amit Shah authored
The busy flag of the TR selector is not set by the hardware. This breaks migration from amd hosts to intel hosts. Signed-off-by:
Amit Shah <amit.shah@redhat.com> Signed-off-by:
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Amit Shah authored
The hardware does not set the 'g' bit of the cs selector and this breaks migration from amd hosts to intel hosts. Set this bit if the segment limit is beyond 1 MB. Signed-off-by:
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Amit Shah authored
get_segment_descritptor_dtable() contains an obvious type. Signed-off-by:
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Sheng Yang authored
Also remove unnecessary parameter of unregister irq ack notifier. Signed-off-by:
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Jan Kiszka authored
As suggested by Avi, this patch introduces a counter of VCPUs that have LVT0 set to NMI mode. Only if the counter > 0, we push the PIT ticks via all LAPIC LVT0 lines to enable NMI watchdog support. Signed-off-by:
Jan Kiszka <jan.kiszka@siemens.com> Acked-by:
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Jan Kiszka authored
This patch refactors the NMI watchdog delivery patch, consolidating tests and providing a proper API for delivering watchdog events. An included micro-optimization is to check only for apic_hw_enabled in kvm_apic_local_deliver (the test for LVT mask is covering the soft-disabled case already). Signed-off-by:
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Guillaume Thouvenin authored
Add decode entries for 0x04 and 0x05 (ADD) opcodes, execution is already implemented. Signed-off-by:
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Sheng Yang authored
PCI device assignment would map guest MMIO spaces as separate slot, so it is possible that the device has more than 2 MMIO spaces and overwrite current private memslot. The patch move private memory slot to the top of userspace visible memory slots. Signed-off-by:
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Sheng Yang authored
Otherwise set_bit() for private memory slot(above KVM_MEMORY_SLOTS) would corrupted memory in 32bit host. Signed-off-by:
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Sheng Yang authored
Remove one left improper comment of removed CR2. Signed-off-by:
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Sheng Yang authored
The effective memory type of EPT is the mixture of MSR_IA32_CR_PAT and memory type field of EPT entry. Signed-off-by:
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Sheng Yang authored
For EPT memory type support. Signed-off-by:
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Sheng Yang authored
GUEST_PAT support is a new feature introduced by Intel Core i7 architecture. With this, cpu would save/load guest and host PAT automatically, for EPT memory type in guest depends on MSR_IA32_CR_PAT. Also add save/restore for MSR_IA32_CR_PAT. Signed-off-by:
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Sheng Yang authored
As well as reset mmu context when set MTRR. Signed-off-by:
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Sheng Yang authored
For KVM can reuse the type define, and need them to support shadow MTRR. Signed-off-by:
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Sheng Yang authored
Prepare for exporting them. Signed-off-by:
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Gleb Natapov authored
Call kvm_arch_vcpu_reset() instead of directly using arch callback. The function does additional things. Signed-off-by:
Gleb Natapov <gleb@redhat.com> Signed-off-by:
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Jan Kiszka authored
Older VMX supporting CPUs do not provide the "Virtual NMI" feature for tracking the NMI-blocked state after injecting such events. For now KVM is unable to inject NMIs on those CPUs. Derived from Sheng Yang's suggestion to use the IRQ window notification for detecting the end of NMI handlers, this patch implements virtual NMI support without impact on the host's ability to receive real NMIs. The downside is that the given approach requires some heuristics that can cause NMI nesting in vary rare corner cases. The approach works as follows: - inject NMI and set a software-based NMI-blocked flag - arm the IRQ window start notification whenever an NMI window is requested - if the guest exits due to an opening IRQ window, clear the emulated NMI-blocked flag - if the guest net execution time with NMI-blocked but without an IRQ window exceeds 1 second, force NMI-blocked reset and inject anyway This approach covers most practical scenarios: - succeeding NMIs are seperated by at least one open IRQ window - the guest may spin with IRQs disabled (e.g. due to a bug), but leaving the NMI handler takes much less time than one second - the guest does not rely on strict ordering or timing of NMIs (would be problematic in virtualized environments anyway) Successfully tested with the 'nmi n' monitor command, the kgdbts testsuite on smp guests (additional patches required to add debug register support to kvm) + the kernel's nmi_watchdog=1, and a Siemens- specific board emulation (+ guest) that comes with its own NMI watchdog mechanism. Signed-off-by:
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Jan Kiszka authored
This patch adds the required bits to the VMX side for user space injected NMIs. As with the preexisting in-kernel irqchip support, the CPU must provide the "virtual NMI" feature for proper tracking of the NMI blocking state. Based on the original patch by Sheng Yang. Signed-off-by:
Sheng Yang <sheng.yang@intel.com> Signed-off-by:
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Jan Kiszka authored
Introduces the KVM_NMI IOCTL to the generic x86 part of KVM for injecting NMIs from user space and also extends the statistic report accordingly. Based on the original patch by Sheng Yang. Signed-off-by:
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Jan Kiszka authored
Kick the NMI receiving VCPU in case the triggering caller runs in a different context. Signed-off-by:
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Jan Kiszka authored
Ensure that a VCPU with pending NMIs is considered runnable. Signed-off-by:
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Jan Kiszka authored
LINT0 of the LAPIC can be used to route PIT events as NMI watchdog ticks into the guest. This patch aligns the in-kernel irqchip emulation with the user space irqchip with already supports this feature. The trick is to route PIT interrupts to all LAPIC's LVT0 lines. Rebased and slightly polished patch originally posted by Sheng Yang. Signed-off-by:
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Jan Kiszka authored
Fix NMI injection in real-mode with the same pattern we perform IRQ injection. Signed-off-by:
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Jan Kiszka authored
do_interrupt_requests and vmx_intr_assist go different way for achieving the same: enabling the nmi/irq window start notification. Unify their code over enable_{irq|nmi}_window, get rid of a redundant call to enable_intr_window instead of direct enable_nmi_window invocation and unroll enable_intr_window for both in-kernel and user space irq injection accordingly. Signed-off-by: -
Jan Kiszka authored
There are currently two ways in VMX to check if an IRQ or NMI can be injected: - vmx_{nmi|irq}_enabled and - vcpu.arch.{nmi|interrupt}_window_open. Even worse, one test (at the end of vmx_vcpu_run) uses an inconsistent, likely incorrect logic. This patch consolidates and unifies the tests over {nmi|interrupt}_window_open as cache + vmx_update_window_states for updating the cache content. Signed-off-by: -
Jan Kiszka authored
CPU reset invalidates pending or already injected NMIs, therefore reset the related state variables. Based on original patch by Gleb Natapov. Signed-off-by:
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Jan Kiszka authored
Properly set GUEST_INTR_STATE_NMI and reset nmi_injected when a task-switch vmexit happened due to a task gate being used for handling NMIs. Also avoid the false warning about valid vectoring info in kvm_handle_exit. Based on original patch by Gleb Natapov. Signed-off-by:
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Jan Kiszka authored
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