linux-stable.git/include/linux/kvm_host.h, branch v3.3.6

KVM: Ensure all vcpus are consistent with in-kernel irqchip settings

2012-05-12T16:32:20+00:00

(cherry picked from commit 3e515705a1f46beb1c942bb8043c16f8ac7b1e9e)

If some vcpus are created before KVM_CREATE_IRQCHIP, then
irqchip_in_kernel() and vcpu->arch.apic will be inconsistent, leading
to potential NULL pointer dereferences.

Fix by:
- ensuring that no vcpus are installed when KVM_CREATE_IRQCHIP is called
- ensuring that a vcpu has an apic if it is installed after KVM_CREATE_IRQCHIP

This is somewhat long winded because vcpu->arch.apic is created without
kvm->lock held.

Based on earlier patch by Michael Ellerman.

Signed-off-by: Michael Ellerman 
Signed-off-by: Avi Kivity 
Signed-off-by: Greg Kroah-Hartman

KVM: unmap pages from the iommu when slots are removed

2012-04-27T17:16:52+00:00

commit 32f6daad4651a748a58a3ab6da0611862175722f upstream.

We've been adding new mappings, but not destroying old mappings.
This can lead to a page leak as pages are pinned using
get_user_pages, but only unpinned with put_page if they still
exist in the memslots list on vm shutdown.  A memslot that is
destroyed while an iommu domain is enabled for the guest will
therefore result in an elevated page reference count that is
never cleared.

Additionally, without this fix, the iommu is only programmed
with the first translation for a gpa.  This can result in
peer-to-peer errors if a mapping is destroyed and replaced by a
new mapping at the same gpa as the iommu will still be pointing
to the original, pinned memory address.

Signed-off-by: Alex Williamson 
Signed-off-by: Marcelo Tosatti 
Signed-off-by: Greg Kroah-Hartman

KVM: Expose a version 2 architectural PMU to a guests

2011-12-27T09:24:29+00:00

Use perf_events to emulate an architectural PMU, version 2.

Based on PMU version 1 emulation by Avi Kivity.

[avi: adjust for cpuid.c]
[jan: fix anonymous field initialization for older gcc]

Signed-off-by: Gleb Natapov 
Signed-off-by: Jan Kiszka 
Signed-off-by: Avi Kivity

KVM: drop bsp_vcpu pointer from kvm struct

2011-12-27T09:22:32+00:00

Drop bsp_vcpu pointer from kvm struct since its only use is incorrect
anyway.

Signed-off-by: Gleb Natapov 
Signed-off-by: Marcelo Tosatti

KVM: introduce a table to map slot id to index in memslots array

2011-12-27T09:17:42+00:00

The operation of getting dirty log is frequent when framebuffer-based
displays are used(for example, Xwindow), so, we introduce a mapping table
to speed up id_to_memslot()

Signed-off-by: Xiao Guangrong 
Signed-off-by: Avi Kivity

KVM: sort memslots by its size and use line search

2011-12-27T09:17:40+00:00

Sort memslots base on its size and use line search to find it, so that the
larger memslots have better fit

The idea is from Avi

Signed-off-by: Xiao Guangrong 
Signed-off-by: Avi Kivity

KVM: introduce id_to_memslot function

2011-12-27T09:17:39+00:00

Introduce id_to_memslot to get memslot by slot id

Signed-off-by: Xiao Guangrong 
Signed-off-by: Avi Kivity

KVM: introduce kvm_for_each_memslot macro

2011-12-27T09:17:37+00:00

Introduce kvm_for_each_memslot to walk all valid memslot

Signed-off-by: Xiao Guangrong 
Signed-off-by: Avi Kivity

KVM: introduce update_memslots function

2011-12-27T09:17:35+00:00

Introduce update_memslots to update slot which will be update to
kvm->memslots

Signed-off-by: Xiao Guangrong 
Signed-off-by: Avi Kivity

KVM: introduce KVM_MEM_SLOTS_NUM macro

2011-12-27T09:17:34+00:00

Introduce KVM_MEM_SLOTS_NUM macro to instead of
KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS

Signed-off-by: Xiao Guangrong 
Signed-off-by: Avi Kivity