linux/virt/kvm
Alex Williamson 32f6daad46 KVM: unmap pages from the iommu when slots are removed
We've been adding new mappings, but not destroying old mappings.
This can lead to a page leak as pages are pinned using
get_user_pages, but only unpinned with put_page if they still
exist in the memslots list on vm shutdown.  A memslot that is
destroyed while an iommu domain is enabled for the guest will
therefore result in an elevated page reference count that is
never cleared.

Additionally, without this fix, the iommu is only programmed
with the first translation for a gpa.  This can result in
peer-to-peer errors if a mapping is destroyed and replaced by a
new mapping at the same gpa as the iommu will still be pointing
to the original, pinned memory address.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-04-11 22:55:25 -03:00
..
assigned-dev.c KVM: Convert intx_mask_lock to spin lock 2012-03-20 12:41:24 +02:00
async_pf.c KVM: fix the race while wakeup all pv guest 2011-01-12 11:29:03 +02:00
async_pf.h KVM: Halt vcpu if page it tries to access is swapped out 2011-01-12 11:21:39 +02:00
coalesced_mmio.c KVM: make checks stricter in coalesced_mmio_in_range() 2011-12-27 11:17:07 +02:00
coalesced_mmio.h KVM: Make coalesced mmio use a device per zone 2011-09-25 19:17:57 +03:00
eventfd.c KVM: Intelligent device lookup on I/O bus 2011-09-25 19:17:59 +03:00
ioapic.c KVM: drop bsp_vcpu pointer from kvm struct 2011-12-27 11:22:32 +02:00
ioapic.h KVM: convert ioapic lock to spinlock 2010-05-13 01:23:55 -03:00
iodev.h KVM: remove in_range from io devices 2009-09-10 08:33:05 +03:00
iommu.c KVM: unmap pages from the iommu when slots are removed 2012-04-11 22:55:25 -03:00
irq_comm.c KVM: fast-path msi injection with irqfd 2011-01-12 11:29:38 +02:00
Kconfig KVM: Halt vcpu if page it tries to access is swapped out 2011-01-12 11:21:39 +02:00
kvm_main.c KVM: unmap pages from the iommu when slots are removed 2012-04-11 22:55:25 -03:00