linux-toradex.git/virt, branch v2.6.35.6

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: read apic->irr with ioapic lock held

2010-06-10T17:29:03+00:00

Read ioapic->irr inside ioapic->lock protected section.

KVM-Stable-Tag
Signed-off-by: Marcelo Tosatti

KVM: Fix order passed to iommu_unmap

2010-06-09T15:48:38+00:00

This is obviously a left-over from the the old interface taking the
size. Apparently a mostly harmless issue with the current iommu_unmap
implementation.

Signed-off-by: Jan Kiszka 
Acked-by: Joerg Roedel 
Signed-off-by: Avi Kivity

Merge branch 'kvm-updates/2.6.35' of git://git.kernel.org/pub/scm/virt/kvm/kvm

2010-05-22T00:16:21+00:00

* 'kvm-updates/2.6.35' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (269 commits)
  KVM: x86: Add missing locking to arch specific vcpu ioctls
  KVM: PPC: Add missing vcpu_load()/vcpu_put() in vcpu ioctls
  KVM: MMU: Segregate shadow pages with different cr0.wp
  KVM: x86: Check LMA bit before set_efer
  KVM: Don't allow lmsw to clear cr0.pe
  KVM: Add cpuid.txt file
  KVM: x86: Tell the guest we'll warn it about tsc stability
  x86, paravirt: don't compute pvclock adjustments if we trust the tsc
  x86: KVM guest: Try using new kvm clock msrs
  KVM: x86: export paravirtual cpuid flags in KVM_GET_SUPPORTED_CPUID
  KVM: x86: add new KVMCLOCK cpuid feature
  KVM: x86: change msr numbers for kvmclock
  x86, paravirt: Add a global synchronization point for pvclock
  x86, paravirt: Enable pvclock flags in vcpu_time_info structure
  KVM: x86: Inject #GP with the right rip on efer writes
  KVM: SVM: Don't allow nested guest to VMMCALL into host
  KVM: x86: Fix exception reinjection forced to true
  KVM: Fix wallclock version writing race
  KVM: MMU: Don't read pdptrs with mmu spinlock held in mmu_alloc_roots
  KVM: VMX: enable VMXON check with SMX enabled (Intel TXT)
  ...

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

Merge branch 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2010-05-18T14:22:37+00:00

* 'core-iommu-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86/amd-iommu: Add amd_iommu=off command line option
  iommu-api: Remove iommu_{un}map_range functions
  x86/amd-iommu: Implement ->{un}map callbacks for iommu-api
  x86/amd-iommu: Make amd_iommu_iova_to_phys aware of multiple page sizes
  x86/amd-iommu: Make iommu_unmap_page and fetch_pte aware of page sizes
  x86/amd-iommu: Make iommu_map_page and alloc_pte aware of page sizes
  kvm: Change kvm_iommu_map_pages to map large pages
  VT-d: Change {un}map_range functions to implement {un}map interface
  iommu-api: Add ->{un}map callbacks to iommu_ops
  iommu-api: Add iommu_map and iommu_unmap functions
  iommu-api: Rename ->{un}map function pointers to ->{un}map_range

KVM: Remove test-before-set optimization for dirty bits

2010-05-17T09:19:13+00:00

As Avi pointed out, testing bit part in mark_page_dirty() was important
in the days of shadow paging, but currently EPT and NPT has already become
common and the chance of faulting a page more that once per iteration is
small. So let's remove the test bit to avoid extra access.

Signed-off-by: Takuya Yoshikawa 
Signed-off-by: Avi Kivity

KVM: do not call hardware_disable() on CPU_UP_CANCELED

2010-05-17T09:18:04+00:00

When CPU_UP_CANCELED, hardware_enable() has not been called at the CPU
which is going up because raw_notifier_call_chain(CPU_ONLINE)
has not been called for this cpu.

Drop the handling for CPU_UP_CANCELED.

Signed-off-by: Lai Jiangshan 
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