lwn.git/virt, branch v2.6.33-rt7

kvm: make_all_cpus_request() needs preempt_disable() on RT

2010-02-24T16:35:13+00:00

smp_call_function_many() needs to be called with preemption disabled, but on RT spin_lock(&kvm->requests_lock) is not doing that. Explicitely disable preemption on RT for the smp_call_function_many() call. Signed-off-by: Thomas Gleixner

Forward to 2.6.33-rc8

2010-02-21T19:17:22+00:00

Merge branch 'linus' into rt/head with a pile of conflicts. Signed-off-by: Thomas Gleixner

KVM: fix spurious interrupt with irqfd

2010-01-25T14:26:39+00:00

kvm didn't clear irqfd counter on deassign, as a result we could get a spurious interrupt when irqfd is assigned back. this leads to poor performance and, in theory, guest crash. Signed-off-by: Michael S. Tsirkin Signed-off-by: Avi Kivity

KVM: properly check max PIC pin in irq route setup

2010-01-25T14:26:38+00:00

Otherwise memory beyond irq_states[16] might be accessed. Noticed by Juan Quintela. Cc: stable@kernel.org Signed-off-by: Marcelo Tosatti Acked-by: Juan Quintela Signed-off-by: Avi Kivity

KVM: only allow one gsi per fd

2010-01-25T14:26:37+00:00

Looks like repeatedly binding same fd to multiple gsi's with irqfd can use up a ton of kernel memory for irqfd structures. A simple fix is to allow each fd to only trigger one gsi: triggering a storm of interrupts in guest is likely useless anyway, and we can do it by binding a single gsi to many interrupts if we really want to. Cc: stable@kernel.org Signed-off-by: Michael S. Tsirkin Acked-by: Acked-by: Gregory Haskins Signed-off-by: Avi Kivity

KVM: get rid of kvm_create_vm() unused label warning on s390

2009-12-27T15:36:34+00:00

arch/s390/kvm/../../../virt/kvm/kvm_main.c: In function 'kvm_create_vm': arch/s390/kvm/../../../virt/kvm/kvm_main.c:409: warning: label 'out_err' defined but not used Signed-off-by: Heiko Carstens Signed-off-by: Avi Kivity

KVM: Fix possible circular locking in kvm_vm_ioctl_assign_device()

2009-12-27T15:36:31+00:00

One possible order is: KVM_CREATE_IRQCHIP ioctl(took kvm->lock) -> kvm_iobus_register_dev() -> down_write(kvm->slots_lock). The other one is in kvm_vm_ioctl_assign_device(), which take kvm->slots_lock first, then kvm->lock. Update the comment of lock order as well. Observe it due to kernel locking debug warnings. Cc: stable@kernel.org Signed-off-by: Sheng Yang Signed-off-by: Avi Kivity

anonfd: Allow making anon files read-only

2009-12-22T17:27:34+00:00

It seems a couple places such as arch/ia64/kernel/perfmon.c and drivers/infiniband/core/uverbs_main.c could use anon_inode_getfile() instead of a private pseudo-fs + alloc_file(), if only there were a way to get a read-only file. So provide this by having anon_inode_getfile() create a read-only file if we pass O_RDONLY in flags. Signed-off-by: Roland Dreier Signed-off-by: Al Viro

Merge commit 'origin/master' into next

2009-12-09T06:14:38+00:00

Conflicts: include/linux/kvm.h

KVM: Allow internal errors reported to userspace to carry extra data

2009-12-03T07:32:24+00:00

Usually userspace will freeze the guest so we can inspect it, but some internal state is not available. Add extra data to internal error reporting so we can expose it to the debugger. Extra data is specific to the suberror. Signed-off-by: Avi Kivity