diff options
Diffstat (limited to 'tools/testing/selftests/kvm/lib/kvm_util.c')
| -rw-r--r-- | tools/testing/selftests/kvm/lib/kvm_util.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index a04302666b02..70676a305523 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -5,6 +5,7 @@ * Copyright (C) 2018, Google LLC. */ +#define _GNU_SOURCE /* for program_invocation_name */ #include "test_util.h" #include "kvm_util.h" #include "kvm_util_internal.h" @@ -281,6 +282,31 @@ struct kvm_vm *vm_create(enum vm_guest_mode mode, uint64_t phy_pages, int perm) return vm; } +struct kvm_vm *vm_create_default(uint32_t vcpuid, uint64_t extra_mem_pages, + void *guest_code) +{ + /* The maximum page table size for a memory region will be when the + * smallest pages are used. Considering each page contains x page + * table descriptors, the total extra size for page tables (for extra + * N pages) will be: N/x+N/x^2+N/x^3+... which is definitely smaller + * than N/x*2. + */ + uint64_t extra_pg_pages = (extra_mem_pages / PTES_PER_MIN_PAGE) * 2; + struct kvm_vm *vm; + + vm = vm_create(VM_MODE_DEFAULT, DEFAULT_GUEST_PHY_PAGES + extra_pg_pages, O_RDWR); + + kvm_vm_elf_load(vm, program_invocation_name, 0, 0); + +#ifdef __x86_64__ + vm_create_irqchip(vm); +#endif + + vm_vcpu_add_default(vm, vcpuid, guest_code); + + return vm; +} + /* * VM Restart * |