search for: kvm_get_dirty_log

...s not have any user-visibe effect other than a small +performance penalty. + +2. ioctl calls to the kvm-vm file descriptor +KVM does support the following ioctls on s390 that are common with other +architectures and do behave the same: +KVM_CREATE_VCPU +KVM_SET_USER_MEMORY_REGION (*) see note +KVM_GET_DIRTY_LOG (**) see note + +Notes: +* kvm does only allow exactly one memory slot on s390, which has to start + at guest absolute address zero and at a user address that is aligned on any + page boundary. This hardware "limitation" allows us to have a few unique + optimizations. The memory s...

...s not have any user-visibe effect other than a small +performance penalty. + +2. ioctl calls to the kvm-vm file descriptor +KVM does support the following ioctls on s390 that are common with other +architectures and do behave the same: +KVM_CREATE_VCPU +KVM_SET_USER_MEMORY_REGION (*) see note +KVM_GET_DIRTY_LOG (**) see note + +Notes: +* kvm does only allow exactly one memory slot on s390, which has to start + at guest absolute address zero and at a user address that is aligned on any + page boundary. This hardware "limitation" allows us to have a few unique + optimizations. The memory s...

...& + (memslot->flags & skip_mask) == 0) + max_gfn = max(max_gfn, memslot->base_gfn + + memslot->npages); + + spin_unlock(&kvm->mmu_lock); + srcu_read_unlock(&kvm->srcu, idx); + + return max_gfn; +} + #ifndef CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT /** * kvm_get_dirty_log - get a snapshot of dirty pages

...e/linux/kvm.h +++ kvm.quilt/include/linux/kvm.h @@ -249,6 +249,7 @@ struct kvm_vapic_addr { #define KVM_CAP_SET_TSS_ADDR 4 #define KVM_CAP_EXT_CPUID 5 #define KVM_CAP_VAPIC 6 +#define KVM_CAP_SYNC_SHADOW_WITH_USER 7 /* * ioctls for VM fds @@ -267,6 +268,7 @@ struct kvm_vapic_addr { #define KVM_GET_DIRTY_LOG _IOW(KVMIO, 0x42, struct kvm_dirty_log) #define KVM_SET_MEMORY_ALIAS _IOW(KVMIO, 0x43, struct kvm_memory_alias) #define KVM_GET_SUPPORTED_CPUID _IOWR(KVMIO, 0x48, struct kvm_cpuid2) +#define KVM_SYNC_SHADOW_WITH_USER _IO(KVMIO, 0x49) /* Device model IOC */ #define KVM_CREATE_IRQC...

...is on how to get the page dirty rate. Does kvm libvirt provide a dirty page log facility that provides user space with a bitmap of modified pages since the last call? And if yes, please kindly direct me on how to get started. I have searched and come across things like VIR_NODE_MEMORY_STATS and kvm_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log, int *is_dirty), I do not know if these are the ones and if yes how I can use them. Thank you very much

This patch series introduces a backend for kvm to run on IBM System z machines that uses the mainframe's sie virtualization capability. This work runs 64bit guests on z800/z890/z900/z990/z9/z10 class machines with a 64bit linux host. Userspace will follow once we're done brushing it over. The patch queue consists of the following patches, which can be applied in sequence on top of kvm.git

This patch series introduces a backend for kvm to run on IBM System z machines that uses the mainframe's sie virtualization capability. This work runs 64bit guests on z800/z890/z900/z990/z9/z10 class machines with a 64bit linux host. Userspace will follow once we're done brushing it over. The patch queue consists of the following patches, which can be applied in sequence on top of kvm.git

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VMs (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VMs (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place