- 27 8月, 2012 1 次提交
-
-
由 Alan Cox 提交于
KVM_SET_SIGNAL_MASK passed a NULL argument leaves the on stack signal sets uninitialized. It then passes them through to kvm_vcpu_ioctl_set_sigmask. We should be passing a NULL in this case not translated garbage. Signed-off-by: NAlan Cox <alan@linux.intel.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
- 07 7月, 2012 1 次提交
-
-
由 Rik van Riel 提交于
If last_boosted_vcpu == 0, then we fall through all test cases and may end up with all VCPUs pouncing on vcpu 0. With a large enough guest, this can result in enormous runqueue lock contention, which can prevent vcpu0 from running, leading to a livelock. Changing < to <= makes sure we properly handle that case. Signed-off-by: NRik van Riel <riel@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
- 04 7月, 2012 1 次提交
-
-
由 Xiao Guangrong 提交于
fault_page is forgot to be freed Signed-off-by: NXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
- 03 7月, 2012 1 次提交
-
-
由 Alex Williamson 提交于
Prune this down to just the struct kvm_irqfd so we can avoid changing function definition for every flag or field we use. Signed-off-by: NAlex Williamson <alex.williamson@redhat.com> Acked-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
- 18 6月, 2012 1 次提交
-
-
由 Marc Zyngier 提交于
The KVM code sometimes uses CONFIG_HAVE_KVM_IRQCHIP to protect code that is related to IRQ routing, which not all in-kernel irqchips may support. Use KVM_CAP_IRQ_ROUTING instead. Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com> Signed-off-by: NChristoffer Dall <c.dall@virtualopensystems.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
- 05 6月, 2012 2 次提交
-
-
由 Takuya Yoshikawa 提交于
lpage_info is created for each large level even when the memory slot is not for RAM. This means that when we add one slot for a PCI device, we end up allocating at least KVM_NR_PAGE_SIZES - 1 pages by vmalloc(). To make things worse, there is an increasing number of devices which would result in more pages being wasted this way. This patch mitigates this problem by using kvm_kvzalloc(). Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Takuya Yoshikawa 提交于
Will be used for lpage_info allocation later. Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
- 01 5月, 2012 1 次提交
-
-
由 Konstantin Weitz 提交于
This patch implements the directed yield hypercall found on other System z hypervisors. It delegates execution time to the virtual cpu specified in the instruction's parameter. Useful to avoid long spinlock waits in the guest. Christian Borntraeger: moved common code in virt/kvm/ Signed-off-by: NKonstantin Weitz <WEITZKON@de.ibm.com> Signed-off-by: NChristian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
- 24 4月, 2012 1 次提交
-
-
由 Jan Kiszka 提交于
Currently, MSI messages can only be injected to in-kernel irqchips by defining a corresponding IRQ route for each message. This is not only unhandy if the MSI messages are generated "on the fly" by user space, IRQ routes are a limited resource that user space has to manage carefully. By providing a direct injection path, we can both avoid using up limited resources and simplify the necessary steps for user land. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
- 12 4月, 2012 1 次提交
-
-
由 Alex Williamson 提交于
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: NAlex Williamson <alex.williamson@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
- 08 4月, 2012 4 次提交
-
-
由 Takuya Yoshikawa 提交于
Now that we do neither double buffering nor heuristic selection of the write protection method these are not needed anymore. Note: some drivers have their own implementation of set_bit_le() and making it generic needs a bit of work; so we use test_and_set_bit_le() and will later replace it with generic set_bit_le(). Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Marcelo Tosatti 提交于
S390's kvm_vcpu_stat does not contain halt_wakeup member. Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Christoffer Dall 提交于
The kvm_vcpu_kick function performs roughly the same funcitonality on most all architectures, so we shouldn't have separate copies. PowerPC keeps a pointer to interchanging waitqueues on the vcpu_arch structure and to accomodate this special need a __KVM_HAVE_ARCH_VCPU_GET_WQ define and accompanying function kvm_arch_vcpu_wq have been defined. For all other architectures this is a generic inline that just returns &vcpu->wq; Acked-by: NScott Wood <scottwood@freescale.com> Signed-off-by: NChristoffer Dall <c.dall@virtualopensystems.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Amos Kong 提交于
This patch makes the kvm_io_range array can be resized dynamically. Signed-off-by: NAmos Kong <akong@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
- 08 3月, 2012 7 次提交
-
-
由 Alex Shi 提交于
Using 'int' type is not suitable for a 'long' object. So, correct it. Signed-off-by: NAlex Shi <alex.shi@intel.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Avi Kivity 提交于
If some vcpus are created before KVM_CREATE_IRQCHIP, then irqchip_in_kernel() and vcpu->arch.apic will be inconsistent, leading to potential NULL pointer dereferences. Fix by: - ensuring that no vcpus are installed when KVM_CREATE_IRQCHIP is called - ensuring that a vcpu has an apic if it is installed after KVM_CREATE_IRQCHIP This is somewhat long winded because vcpu->arch.apic is created without kvm->lock held. Based on earlier patch by Michael Ellerman. Signed-off-by: NMichael Ellerman <michael@ellerman.id.au> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Takuya Yoshikawa 提交于
Other threads may process the same page in that small window and skip TLB flush and then return before these functions do flush. Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Takuya Yoshikawa 提交于
Some members of kvm_memory_slot are not used by every architecture. This patch is the first step to make this difference clear by introducing kvm_memory_slot::arch; lpage_info is moved into it. Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Takuya Yoshikawa 提交于
Narrow down the controlled text inside the conditional so that it will include lpage_info and rmap stuff only. For this we change the way we check whether the slot is being created from "if (npages && !new.rmap)" to "if (npages && !old.npages)". We also stop checking if lpage_info is NULL when we create lpage_info because we do it from inside the slot creation code block. Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Takuya Yoshikawa 提交于
This makes it easy to make lpage_info architecture specific. Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Takuya Yoshikawa 提交于
This patch cleans up the code and removes the "(void)level;" warning suppressor. Note that we can also use this for PT_PAGE_TABLE_LEVEL to treat every level uniformly later. Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
- 05 3月, 2012 4 次提交
-
-
由 Paul Mackerras 提交于
This moves __gfn_to_memslot() and search_memslots() from kvm_main.c to kvm_host.h to reduce the code duplication caused by the need for non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c to call gfn_to_memslot() in real mode. Rather than putting gfn_to_memslot() itself in a header, which would lead to increased code size, this puts __gfn_to_memslot() in a header. Then, the non-modular uses of gfn_to_memslot() are changed to call __gfn_to_memslot() instead. This way there is only one place in the source code that needs to be changed should the gfn_to_memslot() implementation need to be modified. On powerpc, the Book3S HV style of KVM has code that is called from real mode which needs to call gfn_to_memslot() and thus needs this. (Module code is allocated in the vmalloc region, which can't be accessed in real mode.) With this, we can remove builtin_gfn_to_memslot() from book3s_hv_rm_mmu.c. Signed-off-by: NPaul Mackerras <paulus@samba.org> Acked-by: NAvi Kivity <avi@redhat.com> Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Paul Mackerras 提交于
This adds an smp_wmb in kvm_mmu_notifier_invalidate_range_end() and an smp_rmb in mmu_notifier_retry() so that mmu_notifier_retry() will give the correct answer when called without kvm->mmu_lock being held. PowerPC Book3S HV KVM wants to use a bitlock per guest page rather than a single global spinlock in order to improve the scalability of updates to the guest MMU hashed page table, and so needs this. Signed-off-by: NPaul Mackerras <paulus@samba.org> Acked-by: NAvi Kivity <avi@redhat.com> Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Carsten Otte 提交于
This patch exports the s390 SIE hardware control block to userspace via the mapping of the vcpu file descriptor. In order to do so, a new arch callback named kvm_arch_vcpu_fault is introduced for all architectures. It allows to map architecture specific pages. Signed-off-by: NCarsten Otte <cotte@de.ibm.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Carsten Otte 提交于
This patch introduces a new config option for user controlled kernel virtual machines. It introduces a parameter to KVM_CREATE_VM that allows to set bits that alter the capabilities of the newly created virtual machine. The parameter is passed to kvm_arch_init_vm for all architectures. The only valid modifier bit for now is KVM_VM_S390_UCONTROL. This requires CAP_SYS_ADMIN privileges and creates a user controlled virtual machine on s390 architectures. Signed-off-by: NCarsten Otte <cotte@de.ibm.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
- 01 2月, 2012 1 次提交
-
-
由 Takuya Yoshikawa 提交于
It is possible that the __set_bit() in mark_page_dirty() is called simultaneously on the same region of memory, which may result in only one bit being set, because some callers do not take mmu_lock before mark_page_dirty(). This problem is hard to produce because when we reach mark_page_dirty() beginning from, e.g., tdp_page_fault(), mmu_lock is being held during __direct_map(): making kvm-unit-tests' dirty log api test write to two pages concurrently was not useful for this reason. So we have confirmed that there can actually be race condition by checking if some callers really reach there without holding mmu_lock using spin_is_locked(): probably they were from kvm_write_guest_page(). To fix this race, this patch changes the bit operation to the atomic version: note that nr_dirty_pages also suffers from the race but we do not need exactly correct numbers for now. Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
- 27 12月, 2011 12 次提交
-
-
由 Hamo 提交于
by checking the return value from kvm_init_debug, we can ensure that the entries under debugfs for KVM have been created correctly. Signed-off-by: NYang Bai <hamo.by@gmail.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
由 Gleb Natapov 提交于
Drop bsp_vcpu pointer from kvm struct since its only use is incorrect anyway. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
由 Sasha Levin 提交于
Switch to using memdup_user when possible. This makes code more smaller and compact, and prevents errors. Signed-off-by: NSasha Levin <levinsasha928@gmail.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Sasha Levin 提交于
Switch to kmemdup() in two places to shorten the code and avoid possible bugs. Signed-off-by: NSasha Levin <levinsasha928@gmail.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Xiao Guangrong 提交于
The operation of getting dirty log is frequent when framebuffer-based displays are used(for example, Xwindow), so, we introduce a mapping table to speed up id_to_memslot() Signed-off-by: NXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Xiao Guangrong 提交于
Sort memslots base on its size and use line search to find it, so that the larger memslots have better fit The idea is from Avi Signed-off-by: NXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Xiao Guangrong 提交于
Introduce id_to_memslot to get memslot by slot id Signed-off-by: NXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Xiao Guangrong 提交于
Introduce kvm_for_each_memslot to walk all valid memslot Signed-off-by: NXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Xiao Guangrong 提交于
Introduce update_memslots to update slot which will be update to kvm->memslots Signed-off-by: NXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Xiao Guangrong 提交于
Introduce KVM_MEM_SLOTS_NUM macro to instead of KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS Signed-off-by: NXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Takuya Yoshikawa 提交于
Needed for the next patch which uses this number to decide how to write protect a slot. Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
由 Thomas Meyer 提交于
Use kmemdup rather than duplicating its implementation The semantic patch that makes this change is available in scripts/coccinelle/api/memdup.cocci. More information about semantic patching is available at http://coccinelle.lip6.fr/Signed-off-by: NThomas Meyer <thomas@m3y3r.de> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
-
- 26 9月, 2011 1 次提交
-
-
由 Sasha Levin 提交于
Currently the method of dealing with an IO operation on a bus (PIO/MMIO) is to call the read or write callback for each device registered on the bus until we find a device which handles it. Since the number of devices on a bus can be significant due to ioeventfds and coalesced MMIO zones, this leads to a lot of overhead on each IO operation. Instead of registering devices, we now register ranges which points to a device. Lookup is done using an efficient bsearch instead of a linear search. Performance test was conducted by comparing exit count per second with 200 ioeventfds created on one byte and the guest is trying to access a different byte continuously (triggering usermode exits). Before the patch the guest has achieved 259k exits per second, after the patch the guest does 274k exits per second. Cc: Avi Kivity <avi@redhat.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NSasha Levin <levinsasha928@gmail.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-
- 24 7月, 2011 1 次提交
-
-
由 Xiao Guangrong 提交于
The idea is from Avi: | We could cache the result of a miss in an spte by using a reserved bit, and | checking the page fault error code (or seeing if we get an ept violation or | ept misconfiguration), so if we get repeated mmio on a page, we don't need to | search the slot list/tree. | (https://lkml.org/lkml/2011/2/22/221) When the page fault is caused by mmio, we cache the info in the shadow page table, and also set the reserved bits in the shadow page table, so if the mmio is caused again, we can quickly identify it and emulate it directly Searching mmio gfn in memslots is heavy since we need to walk all memeslots, it can be reduced by this feature, and also avoid walking guest page table for soft mmu. [jan: fix operator precedence issue] Signed-off-by: NXiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
-