linux-toradex.git/virt, branch v2.6.27.39

KVM: Fix dirty bit tracking for slots with large pages

2009-09-09T03:17:27+00:00

(cherry picked from commit e244584fe3a5c20deddeca246548ac86dbc6e1d1)

When slot is already allocated and being asked to be tracked we need
to break the large pages.

This code flush the mmu when someone ask a slot to start dirty bit
tracking.

Signed-off-by: Izik Eidus 
Signed-off-by: Avi Kivity 
Signed-off-by: Greg Kroah-Hartman

KVM: MMU: do not free active mmu pages in free_mmu_pages()

2009-09-09T03:17:25+00:00

(cherry picked from commit f00be0cae4e6ad0a8c7be381c6d9be3586800b3e)

free_mmu_pages() should only undo what alloc_mmu_pages() does.
Free mmu pages from the generic VM destruction function, kvm_destroy_vm().

Signed-off-by: Gleb Natapov 
Signed-off-by: Avi Kivity 
Signed-off-by: Greg Kroah-Hartman

KVM: Don't destroy vcpu in case vcpu_setup fails

2009-09-09T03:17:16+00:00

(cherry picked from commit 7d8fece678c1abc2ca3e1ceda2277c3538a9161c)

One of vcpu_setup responsibilities is to do mmu initialization.
However, in case we fail in kvm_arch_vcpu_reset, before we get the
chance to init mmu. OTOH, vcpu_destroy will attempt to destroy mmu,
triggering a bug. Keeping track of whether or not mmu is initialized
would unnecessarily complicate things. Rather, we just make return,
making sure any needed uninitialization is done before we return, in
case we fail.

Signed-off-by: Glauber Costa 
Signed-off-by: Avi Kivity 
Signed-off-by: Greg Kroah-Hartman

KVM: Reduce stack usage in kvm_vcpu_ioctl()

2009-09-09T03:17:10+00:00

(cherry picked from commit fa3795a7308df099f0f2c9e5ca2c20a5ff65bdc4)

Signed-off-by: Dave Hansen 
Signed-off-by: Avi Kivity 
Signed-off-by: Greg Kroah-Hartman

KVM: Don't call get_user_pages(.force = 1)

2009-09-09T03:17:03+00:00

(cherry picked from commit d657c7335b97d746aa6123c56504b46c20e37df3)

This is esoteric and only needed to break COW on MAP_SHARED mappings.  Since
KVM no longer does these sorts of mappings, breaking COW on them is no longer
necessary.

Signed-off-by: Avi Kivity 
Signed-off-by: Greg Kroah-Hartman

KVM: Synchronize guest physical memory map to host virtual memory map

2008-07-29T09:33:53+00:00

Synchronize changes to host virtual addresses which are part of
a KVM memory slot to the KVM shadow mmu.  This allows pte operations
like swapping, page migration, and madvise() to transparently work
with KVM.

Signed-off-by: Andrea Arcangeli 
Signed-off-by: Avi Kivity

KVM: Allow browsing memslots with mmu_lock

2008-07-29T09:33:50+00:00

This allows reading memslots with only the mmu_lock hold for mmu
notifiers that runs in atomic context and with mmu_lock held.

Signed-off-by: Andrea Arcangeli 
Signed-off-by: Avi Kivity

flag parameters: anon_inode_getfd extension

2008-07-24T17:47:27+00:00

This patch just extends the anon_inode_getfd interface to take an additional
parameter with a flag value.  The flag value is passed on to
get_unused_fd_flags in anticipation for a use with the O_CLOEXEC flag.

No actual semantic changes here, the changed callers all pass 0 for now.

[akpm@linux-foundation.org: KVM fix]
Signed-off-by: Ulrich Drepper 
Acked-by: Davide Libenzi 
Cc: Michael Kerrisk 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

KVM: Adjust smp_call_function_mask() callers to new requirements

2008-07-20T11:29:54+00:00

smp_call_function_mask() now complains when called in a preemptible context;
adjust its callers accordingly.

Signed-off-by: Avi Kivity

KVM: MMU: nuke shadowed pgtable pages and ptes on memslot destruction

2008-07-20T09:42:40+00:00

Flush the shadow mmu before removing regions to avoid stale entries.

Signed-off-by: Marcelo Tosatti 
Signed-off-by: Avi Kivity