linux/virt/kvm/iommu.c, branch v2.6.39-rc2

KVM: Use u64 for frame data types

2010-08-02T03:39:44Z

For 32bit machines where the physical address width is larger than the virtual address width the frame number types in KVM may overflow. Fix this by changing them to u64. [sfr: fix build on 32-bit ppc] Signed-off-by: Joerg Roedel Signed-off-by: Stephen Rothwell Signed-off-by: Marcelo Tosatti

KVM: Fix IOMMU memslot reference warning

2010-08-01T07:47:29Z

This patch fixes the following warning. =================================================== [ INFO: suspicious rcu_dereference_check() usage. ] --------------------------------------------------- include/linux/kvm_host.h:259 invoked rcu_dereference_check() without protection! other info that might help us debug this: rcu_scheduler_active = 1, debug_locks = 0 no locks held by qemu-system-x86/29679. stack backtrace: Pid: 29679, comm: qemu-system-x86 Not tainted 2.6.35-rc3+ #200 Call Trace: [] lockdep_rcu_dereference+0xa8/0xb1 [] kvm_iommu_unmap_memslots+0xc9/0xde [kvm] [] kvm_iommu_unmap_guest+0x40/0x4e [kvm] [] kvm_arch_destroy_vm+0x1a/0x186 [kvm] [] kvm_put_kvm+0x110/0x167 [kvm] [] kvm_vcpu_release+0x18/0x1c [kvm] [] fput+0x22a/0x3a0 [] filp_close+0xb4/0xcd [] put_files_struct+0x1b7/0x36b [] ? put_files_struct+0x48/0x36b [] ? do_raw_spin_unlock+0x118/0x160 [] exit_files+0x6d/0x75 [] do_exit+0x47d/0xc60 [] ? _raw_spin_unlock_irq+0x30/0x36 [] do_group_exit+0xcf/0x134 [] get_signal_to_deliver+0x732/0x81d [] ? cpu_clock+0x4e/0x60 [] do_notify_resume+0x117/0xc43 [] ? trace_hardirqs_on+0xd/0xf [] ? sys_rt_sigtimedwait+0x2b5/0x3bf [] ? trace_hardirqs_off_thunk+0x3a/0x3c [] ? sysret_signal+0x5/0x3d [] int_signal+0x12/0x17 Signed-off-by: Sheng Yang Signed-off-by: Marcelo Tosatti

KVM: Update Red Hat copyrights

2010-08-01T07:35:51Z

Signed-off-by: Avi Kivity

KVM: Fix order passed to iommu_unmap

2010-06-09T15:48:38Z

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

2010-05-22T00:16:21Z

* '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: use the correct RCU API for PROVE_RCU=y

2010-05-17T09:18:01Z

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: Change kvm_iommu_map_pages to map large pages

2010-03-07T17:01:11Z

This patch changes the implementation of of kvm_iommu_map_pages to map the pages with the host page size into the io virtual address space. Signed-off-by: Joerg Roedel Acked-By: Avi Kivity

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

2010-03-01T15:36:06Z

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

KVM: introduce kvm->srcu and convert kvm_set_memory_region to SRCU update

2010-03-01T15:35:44Z

Use two steps for memslot deletion: mark the slot invalid (which stops instantiation of new shadow pages for that slot, but allows destruction), then instantiate the new empty slot. Also simplifies kvm_handle_hva locking. Signed-off-by: Marcelo Tosatti

KVM: use gfn_to_pfn_memslot in kvm_iommu_map_pages

2010-03-01T15:35:44Z

So its possible to iommu map a memslot before making it visible to kvm. Signed-off-by: Marcelo Tosatti