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Author SHA1 Message Date
Marcelo Tosatti
7ec5458821 KVM: Add kvm_read_guest_atomic() 
In preparation for a mmu spinlock, add kvm_read_guest_atomic()
and use it in fetch() and prefetch_page().

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
 2008-01-30 18:01:20 +02:00
Marcelo Tosatti
10589a4699 KVM: MMU: Concurrent guest walkers 
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 <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
 2008-01-30 18:01:20 +02:00
Avi Kivity
0fce5623ba KVM: Move drivers/kvm/* to virt/kvm/ 
Signed-off-by: Avi Kivity <avi@qumranet.com>
 2008-01-30 18:01:18 +02:00
Renamed from drivers/kvm/kvm_main.c (Browse further)