talos-obmc-linux/virt/kvm, branch v2.6.25

KVM: Route irq 0 to vcpu 0 exclusively

2008-03-04T13:19:48+00:00

Some Linux versions allow the timer interrupt to be processed by more than one cpu, leading to hangs due to tsc instability. Work around the issue by only disaptching the interrupt to vcpu 0. Problem analyzed (and patch tested) by Sheng Yang. Signed-off-by: Avi Kivity

KVM: remove the usage of the mmap_sem for the protection of the memory slots.

2008-03-04T13:19:40+00:00

This patch replaces the mmap_sem lock for the memory slots with a new kvm private lock, it is needed beacuse untill now there were cases where kvm accesses user memory while holding the mmap semaphore. Signed-off-by: Izik Eidus Signed-off-by: Avi Kivity

libfs: allow error return from simple attributes

2008-02-08T17:22:34+00:00

Sometimes simple attributes might need to return an error, e.g. for acquiring a mutex interruptibly. In fact we have that situation in spufs already which is the original user of the simple attributes. This patch merged the temporarily forked attributes in spufs back into the main ones and allows to return errors. [akpm@linux-foundation.org: build fix] Signed-off-by: Christoph Hellwig Cc: Cc: Arnd Bergmann Cc: Greg KH Cc: Al Viro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

KVM: MMU: Switch to mmu spinlock

2008-01-30T16:01:21+00:00

Convert the synchronization of the shadow handling to a separate mmu_lock spinlock. Also guard fetch() by mmap_sem in read-mode to protect against alias and memslot changes. Signed-off-by: Marcelo Tosatti Signed-off-by: Avi Kivity

KVM: Add kvm_read_guest_atomic()

2008-01-30T16:01:20+00:00

In preparation for a mmu spinlock, add kvm_read_guest_atomic() and use it in fetch() and prefetch_page(). Signed-off-by: Marcelo Tosatti Signed-off-by: Avi Kivity

KVM: MMU: Concurrent guest walkers

2008-01-30T16:01:20+00:00

Do not hold kvm->lock mutex across the entire pagefault code, only acquire it in places where it is necessary, such as mmu hash list, active list, rmap and parent pte handling. Allow concurrent guest walkers by switching walk_addr() to use mmap_sem in read-mode. And get rid of the lockless __gfn_to_page. [avi: move kvm_mmu_pte_write() locking inside the function] [avi: add locking for real mode] [avi: fix cmpxchg locking] Signed-off-by: Marcelo Tosatti Signed-off-by: Avi Kivity

KVM: Move ioapic code to common directory.

2008-01-30T16:01:19+00:00

Move ioapic code to common, since IA64 also needs it. Signed-off-by: Zhang Xiantao Signed-off-by: Avi Kivity

KVM: Move drivers/kvm/* to virt/kvm/

2008-01-30T16:01:18+00:00

Signed-off-by: Avi Kivity