15 Oct, 2007
1 commit
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Modify KVM to update guest time accounting.
[ mingo@elte.hu: ported to 2.6.24 KVM. ]
Signed-off-by: Laurent Vivier
Acked-by: Avi Kivity
Signed-off-by: Ingo Molnar
13 Oct, 2007
39 commits
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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
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Report failed opcodes from all locations.
Signed-off-by: Avi Kivity
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This simplifies adding new code as well as reducing overall code size.
Signed-off-by: Avi Kivity
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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
Signed-off-by: Avi Kivity -
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
Signed-off-by: Avi Kivity -
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
Signed-off-by: Avi Kivity -
We don't update the vcpu control registers in various places. We
should do so.Signed-off-by: Rusty Russell
Signed-off-by: Avi Kivity -
This was missed when moving stuff around in fbc4f2e
Fixes Solaris guests and bug #1773613
Signed-off-by: Amit Shah
Signed-off-by: Avi Kivity -
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
Signed-off-by: Xin Li
Signed-off-by: Avi Kivity -
Signed-off-by: Qing He
Signed-off-by: Avi Kivity -
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
Signed-off-by: Qing He
Signed-off-by: Avi Kivity -
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
Signed-off-by: Qing He
Signed-off-by: Avi Kivity -
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
Signed-off-by: Qing He
Signed-off-by: Avi Kivity -
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
Signed-off-by: Yaozu (Eddie) Dong
Signed-off-by: Avi Kivity -
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
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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
Signed-off-by: Qing He
Signed-off-by: Avi Kivity -
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
Signed-off-by: Avi Kivity -
By sleeping in the kernel when hlt is executed, we simplify the in-kernel
guest interrupt path considerably.Signed-off-by: Gregory Haskins
Signed-off-by: Yaozu (Eddie) Dong
Signed-off-by: Avi Kivity -
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
Signed-off-by: Avi Kivity -
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
Signed-off-by: Qing He
Signed-off-by: Avi Kivity -
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
Signed-off-by: Avi Kivity -
Signed-off-by: Yaozu (Eddie) Dong
Signed-off-by: Avi Kivity -
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
Signed-off-by: Avi Kivity -
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
Signed-off-by: Avi Kivity -
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
Signed-off-by: Avi Kivity -
All guest-invokable printks should be ratelimited to prevent malicious
guests from flooding logs. This is a start.Signed-off-by: Rusty Russell
Signed-off-by: Avi Kivity -
Devices don't need open or release functions.
Signed-off-by: Rusty Russell
Signed-off-by: Avi Kivity -
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
Signed-off-by: Avi Kivity -
For some reason, mark_page_dirty open-codes __gfn_to_memslot().
Signed-off-by: Rusty Russell
Signed-off-by: Avi Kivity -
sSigned-off-by: Rusty Russell
Signed-off-by: Avi Kivity -
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
Signed-off-by: Avi Kivity -
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
Signed-off-by: Avi Kivity -
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
Signed-off-by: Avi Kivity -
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
Signed-off-by: Avi Kivity -
... in favor of the more general emulator_{read,write}_*.
Signed-off-by: Laurent Vivier
Signed-off-by: Avi Kivity -
... instead of a x86_emulate_ctxt, so that other callers can use it easily.
Signed-off-by: Laurent Vivier
Signed-off-by: Avi Kivity -
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
Signed-off-by: Avi Kivity -
Now that kvm generally runs with preemption enabled, we need to protect
the fpu intialization sequence.Signed-off-by: Rusty Russell
Signed-off-by: Avi Kivity -
This allows the kvm mmu to perform sleepy operations, such as memory
allocation.Signed-off-by: Shaohua Li
Signed-off-by: Avi Kivity
