linux-stable.git/include/linux/kvm_host.h, branch linux-2.6.35.y

KVM: Keep slot ID in memory slot structure

2010-09-27T00:18:32+00:00

commit e36d96f7cfaa71870c407131eb4fbd38ea285c01 upstream.

May be used for distinguishing between internal and user slots, or for sorting
slots in size order.

Signed-off-by: Avi Kivity 
Cc: Marcelo Tosatti 
Signed-off-by: Greg Kroah-Hartman

KVM: Let vcpu structure alignment be determined at runtime

2010-05-19T08:36:29+00:00

vmx and svm vcpus have different contents and therefore may have different
alignmment requirements.  Let each specify its required alignment.

Signed-off-by: Avi Kivity

KVM: Get rid of dead function gva_to_page()

2010-05-17T09:18:10+00:00

Nobody use gva_to_page() anymore, get rid of it.

Signed-off-by: Gui Jianfeng 
Signed-off-by: Avi Kivity

KVM: use the correct RCU API for PROVE_RCU=y

2010-05-17T09:18:01+00:00

The RCU/SRCU API have already changed for proving RCU usage.

I got the following dmesg when PROVE_RCU=y because we used incorrect API.
This patch coverts rcu_deference() to srcu_dereference() or family API.

===================================================
[ INFO: suspicious rcu_dereference_check() usage. ]
---------------------------------------------------
arch/x86/kvm/mmu.c:3020 invoked rcu_dereference_check() without protection!

other info that might help us debug this:

rcu_scheduler_active = 1, debug_locks = 0
2 locks held by qemu-system-x86/8550:
 #0:  (&kvm->slots_lock){+.+.+.}, at: [] kvm_set_memory_region+0x29/0x50 [kvm]
 #1:  (&(&kvm->mmu_lock)->rlock){+.+...}, at: [] kvm_arch_commit_memory_region+0xa6/0xe2 [kvm]

stack backtrace:
Pid: 8550, comm: qemu-system-x86 Not tainted 2.6.34-rc4-tip-01028-g939eab1 #27
Call Trace:
 [] lockdep_rcu_dereference+0xaa/0xb3
 [] kvm_mmu_calculate_mmu_pages+0x44/0x7d [kvm]
 [] kvm_arch_commit_memory_region+0xb7/0xe2 [kvm]
 [] __kvm_set_memory_region+0x636/0x6e2 [kvm]
 [] kvm_set_memory_region+0x37/0x50 [kvm]
 [] vmx_set_tss_addr+0x46/0x5a [kvm_intel]
 [] kvm_arch_vm_ioctl+0x17a/0xcf8 [kvm]
 [] ? unlock_page+0x27/0x2c
 [] ? __do_fault+0x3a9/0x3e1
 [] kvm_vm_ioctl+0x364/0x38d [kvm]
 [] ? up_read+0x23/0x3d
 [] vfs_ioctl+0x32/0xa6
 [] do_vfs_ioctl+0x495/0x4db
 [] ? fget_light+0xc2/0x241
 [] ? do_sys_open+0x104/0x116
 [] ? retint_swapgs+0xe/0x13
 [] sys_ioctl+0x47/0x6a
 [] system_call_fastpath+0x16/0x1b

Signed-off-by: Lai Jiangshan 
Signed-off-by: Avi Kivity

KVM: limit the number of pages per memory slot

2010-05-17T09:17:41+00:00

This patch limits the number of pages per memory slot to make
us free from extra care about type issues.

Signed-off-by: Takuya Yoshikawa 
Signed-off-by: Marcelo Tosatti

KVM: Increase NR_IOBUS_DEVS limit to 200

2010-04-20T10:08:30+00:00

This patch increases the current hardcoded limit of NR_IOBUS_DEVS
from 6 to 200. We are hitting this limit when creating a guest with more
than 1 virtio-net device using vhost-net backend. Each virtio-net
device requires 2 such devices to service notifications from rx/tx queues.

Signed-off-by: Sridhar Samudrala 
Signed-off-by: Avi Kivity

KVM: fix the handling of dirty bitmaps to avoid overflows

2010-04-20T10:06:55+00:00

Int is not long enough to store the size of a dirty bitmap.

This patch fixes this problem with the introduction of a wrapper
function to calculate the sizes of dirty bitmaps.

Note: in mark_page_dirty(), we have to consider the fact that
  __set_bit() takes the offset as int, not long.

Signed-off-by: Takuya Yoshikawa 
Signed-off-by: Marcelo Tosatti

KVM: Convert kvm->requests_lock to raw_spinlock_t

2010-03-01T15:36:13+00:00

The code relies on kvm->requests_lock inhibiting preemption.

Noted by Jan Kiszka.

Signed-off-by: Avi Kivity

KVM: Introduce kvm_host_page_size

2010-03-01T15:36:08+00:00

This patch introduces a generic function to find out the
host page size for a given gfn. This function is needed by
the kvm iommu code. This patch also simplifies the x86
host_mapping_level function.

Signed-off-by: Joerg Roedel 
Signed-off-by: Avi Kivity

KVM: enable PCI multiple-segments for pass-through device

2010-03-01T15:36:06+00:00

Enable optional parameter (default 0) - PCI segment (or domain) besides
BDF, when assigning PCI device to guest.

Signed-off-by: Zhai Edwin 
Acked-by: Chris Wright 
Signed-off-by: Marcelo Tosatti