1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * tools/testing/selftests/kvm/include/memstress.h 4 * 5 * Copyright (C) 2020, Google LLC. 6 */ 7 8 #ifndef SELFTEST_KVM_MEMSTRESS_H 9 #define SELFTEST_KVM_MEMSTRESS_H 10 11 #include <pthread.h> 12 13 #include "kvm_util.h" 14 15 /* Default guest test virtual memory offset */ 16 #define DEFAULT_GUEST_TEST_MEM 0xc0000000 17 18 #define DEFAULT_PER_VCPU_MEM_SIZE (1 << 30) /* 1G */ 19 20 #define MEMSTRESS_MEM_SLOT_INDEX 1 21 22 struct memstress_vcpu_args { 23 uint64_t gpa; 24 uint64_t gva; 25 uint64_t pages; 26 27 /* Only used by the host userspace part of the vCPU thread */ 28 struct kvm_vcpu *vcpu; 29 int vcpu_idx; 30 }; 31 32 struct memstress_args { 33 struct kvm_vm *vm; 34 /* The starting address and size of the guest test region. */ 35 uint64_t gpa; 36 uint64_t size; 37 uint64_t guest_page_size; 38 uint32_t random_seed; 39 uint32_t write_percent; 40 41 /* Run vCPUs in L2 instead of L1, if the architecture supports it. */ 42 bool nested; 43 /* Randomize which pages are accessed by the guest. */ 44 bool random_access; 45 /* True if all vCPUs are pinned to pCPUs */ 46 bool pin_vcpus; 47 /* The vCPU=>pCPU pinning map. Only valid if pin_vcpus is true. */ 48 uint32_t vcpu_to_pcpu[KVM_MAX_VCPUS]; 49 50 /* Test is done, stop running vCPUs. */ 51 bool stop_vcpus; 52 53 struct memstress_vcpu_args vcpu_args[KVM_MAX_VCPUS]; 54 }; 55 56 extern struct memstress_args memstress_args; 57 58 struct kvm_vm *memstress_create_vm(enum vm_guest_mode mode, int nr_vcpus, 59 uint64_t vcpu_memory_bytes, int slots, 60 enum vm_mem_backing_src_type backing_src, 61 bool partition_vcpu_memory_access); 62 void memstress_destroy_vm(struct kvm_vm *vm); 63 64 void memstress_set_write_percent(struct kvm_vm *vm, uint32_t write_percent); 65 void memstress_set_random_seed(struct kvm_vm *vm, uint32_t random_seed); 66 void memstress_set_random_access(struct kvm_vm *vm, bool random_access); 67 68 void memstress_start_vcpu_threads(int vcpus, void (*vcpu_fn)(struct memstress_vcpu_args *)); 69 void memstress_join_vcpu_threads(int vcpus); 70 void memstress_guest_code(uint32_t vcpu_id); 71 72 uint64_t memstress_nested_pages(int nr_vcpus); 73 void memstress_setup_nested(struct kvm_vm *vm, int nr_vcpus, struct kvm_vcpu *vcpus[]); 74 75 #endif /* SELFTEST_KVM_MEMSTRESS_H */ 76