path: root/virt
AgeCommit message (Collapse)Author
2008-03-04KVM: Route irq 0 to vcpu 0 exclusivelyAvi Kivity
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 <>
2008-03-04KVM: remove the usage of the mmap_sem for the protection of the memory slots.Izik Eidus
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 <>
2008-02-08libfs: allow error return from simple attributesChristoph Hellwig
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. [ 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 <>
2008-01-30KVM: MMU: Switch to mmu spinlockMarcelo Tosatti
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 <>
2008-01-30KVM: Add kvm_read_guest_atomic()Marcelo Tosatti
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 <>
2008-01-30KVM: MMU: Concurrent guest walkersMarcelo Tosatti
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 <>
2008-01-30KVM: Move ioapic code to common directory.Zhang Xiantao
Move ioapic code to common, since IA64 also needs it. Signed-off-by: Zhang Xiantao <> Signed-off-by: Avi Kivity <>
2008-01-30KVM: Move drivers/kvm/* to virt/kvm/Avi Kivity
Signed-off-by: Avi Kivity <>