search for: access_tree

...} + } +} diff --git a/include/linux/kvmi_host.h b/include/linux/kvmi_host.h index 1fae589d9d35..11eb9b1c3c5e 100644 --- a/include/linux/kvmi_host.h +++ b/include/linux/kvmi_host.h @@ -64,6 +64,9 @@ struct kvm_introspection { atomic_t ev_seq; bool cleanup_on_unhook; + + struct radix_tree_root access_tree; + rwlock_t access_tree_lock; }; int kvmi_version(void); diff --git a/include/uapi/linux/kvmi.h b/include/uapi/linux/kvmi.h index 2872f90ff092..dc82f192534c 100644 --- a/include/uapi/linux/kvmi.h +++ b/include/uapi/linux/kvmi.h @@ -45,6 +45,8 @@ enum { KVMI_VCPU_GET_MTRR_TYPE = 21, KVMI_VCP...

...| + KVMI_PAGE_ACCESS_X; void *kvmi_msg_alloc(void) { @@ -34,23 +51,96 @@ void kvmi_msg_free(void *addr) kmem_cache_free(msg_cache, addr); } +static struct kvmi_mem_access *__kvmi_get_gfn_access(struct kvmi *ikvm, + const gfn_t gfn) +{ + return radix_tree_lookup(&ikvm->access_tree, gfn); +} + +static int kvmi_get_gfn_access(struct kvmi *ikvm, const gfn_t gfn, + u8 *access) +{ + struct kvmi_mem_access *m; + + *access = full_access; + + read_lock(&ikvm->access_tree_lock); + m = __kvmi_get_gfn_access(ikvm, gfn); + if (m) + *access = m->access; + read_unlock(...

This patch series is based on the VM introspection patches (https://lore.kernel.org/kvm/20200721210922.7646-1-alazar at bitdefender.com/), extending the introspection API with EPT Views and Virtualization Exceptions (#VE) support. The purpose of this series is to get an initial feedback and to see if we are on the right track, especially because the changes made to add the EPT views are not small

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 VM-s (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 VM-s (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