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# Date Author Comment
e22a25c9 03/12/2009 10:12 pm aliguori

Guest debugging support for KVM (Jan Kiszka)

This is a backport of the guest debugging support for the KVM
accelerator that is now part of the KVM tree. It implements the reworked
KVM kernel API for guest debugging (KVM_CAP_SET_GUEST_DEBUG) which is
not yet part of any mainline kernel but will probably be 2.6.30 stuff....
be214e6c 03/06/2009 11:48 pm aurel32

Fix race condition on access to env->interrupt_request

env->interrupt_request is accessed as the bit level from both main code
and signal handler, making a race condition possible even on CISC CPU.
This causes freeze of QEMU under high load when running the dyntick...
1eec614b 02/06/2009 12:06 am aliguori

toplevel: remove error handling from qemu_malloc() callers (Avi Kivity)

Signed-off-by: Avi Kivity <>
Signed-off-by: Anthony Liguori <>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6531 c046a42c-6fe2-441c-8c8c-71466251a162
a9c11522 12/19/2008 12:42 am aurel32

KVM: Silence unused s warning

Move s under #ifdef to avoid compiler warning.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Aurelien Jarno <>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6086 c046a42c-6fe2-441c-8c8c-71466251a162
f5d6f51b 12/16/2008 12:20 am aliguori

kvm: sync vcpu state during initialization (Hollis Blanchard)

Currently on x86, qemu initializes CPUState but KVM ignores it and does its
own vcpu initialization. However, PowerPC KVM needs to be able to set the
initial register state to support the -kernel and -append options....
f65ed4c1 12/09/2008 10:09 pm aliguori

KVM: Coalesced MMIO support

MMIO exits are more expensive in KVM or Xen than in QEMU because they
involve, at least, privilege transitions. However, MMIO write
operations can be effectively batched if those writes do not have side
effects.

Good examples of this include VGA pixel operations when in a planar...
d85dc283 12/09/2008 09:59 pm aliguori

Disable KVM support if the kernel modules have broken memory slot handling

Prior to kvm-80, memory slot deletion was broken in the KVM kernel
modules. In kvm-81, a new capability is introduced to signify that this
problem has been fixed.

Since we rely on being able to delete memory slots, refuse to work with...
bd322087 12/04/2008 10:33 pm aliguori

Add virtio-balloon support

This adds a VirtIO based balloon driver. It uses madvise() to actually balloon
the memory when possible.

Until 2.6.27, KVM forced memory pinning so we must disable ballooning unless the
kernel actually supports it when using KVM. It's always safe when using TCG....
5832d1f2 11/24/2008 09:36 pm aliguori

kvm: Introduce kvm logging interface (Glauber Costa)

Introduce functions to control logging of memory regions.
We select regions based on its start address, a
guest_physical_addr (target_phys_addr_t, in qemu nomenclature).

The main user of this interface right now is VGA optimization...
34fc643f 11/19/2008 07:41 pm aliguori

Make KVMSlot a real structure

struct kvm_userspace_memory_region does not use QEMU friendly types to
define memory slots. This results in lots of ugly casting with warnings
on 32-bit platforms.

This patch introduces a proper KVMSlot structure that uses QEMU types to...
a3d6841f 11/19/2008 05:09 pm aliguori

kvm: de-register mem region for MMIO (Glauber Costa)

Besides unassigned memory, we also don't care about MMIO.
So if we're giving an MMIO area that is already registered,
wipe it out.

Signed-off-by: Glauber Costa <>
Signed-off-by: Anthony Liguori <>...
62d60e8c 11/18/2008 05:41 pm aliguori

Make KVM slot management more robust

KVM keeps track of physical memory based on slots in the kernel. The current
code that translates QEMU memory mappings to slots work but is not robust
in the fact of reregistering partial regions of memory.

This patch does the right thing for reregistering partial regions of memory. It...
984b5181 11/13/2008 09:21 pm aliguori

Define kvm_ioctl in the same way as ioctl

The third argument to ioctl is a ... which allows any value to be passed. In
practice, glibc always treats the argument as a void *.

Do the same thing for the kvm ioctls to keep things consistent with a
traditional ioctl....
becfc390 11/10/2008 05:55 pm aliguori

KVM: simplify kvm_cpu_exec hook

We don't need to use cpu_loop_exit() because we never use the
condition codes so everything can be folded into a single case.

Signed-off-by: Anthony Liguori <>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5669 c046a42c-6fe2-441c-8c8c-71466251a162
05330448 11/05/2008 06:29 pm aliguori

Add missing files to KVM commit.

Signed-off-by: Anthony Liguori <>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5629 c046a42c-6fe2-441c-8c8c-71466251a162