diff options
Diffstat (limited to 'tools/testing/selftests/kvm')
| -rw-r--r-- | tools/testing/selftests/kvm/dirty_log_test.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/tools/testing/selftests/kvm/dirty_log_test.c b/tools/testing/selftests/kvm/dirty_log_test.c index 6737b26b975e..cf2099abb121 100644 --- a/tools/testing/selftests/kvm/dirty_log_test.c +++ b/tools/testing/selftests/kvm/dirty_log_test.c @@ -263,6 +263,9 @@ static struct kvm_vm *create_vm(enum vm_guest_mode mode, uint32_t vcpuid, return vm; } +#define DIRTY_MEM_BITS 30 /* 1G */ +#define PAGE_SHIFT_4K 12 + static void run_test(enum vm_guest_mode mode, unsigned long iterations, unsigned long interval, uint64_t phys_offset) { @@ -272,6 +275,18 @@ static void run_test(enum vm_guest_mode mode, unsigned long iterations, uint64_t max_gfn; unsigned long *bmap; + /* + * We reserve page table for 2 times of extra dirty mem which + * will definitely cover the original (1G+) test range. Here + * we do the calculation with 4K page size which is the + * smallest so the page number will be enough for all archs + * (e.g., 64K page size guest will need even less memory for + * page tables). + */ + vm = create_vm(mode, VCPU_ID, + 2ul << (DIRTY_MEM_BITS - PAGE_SHIFT_4K), + guest_code); + switch (mode) { case VM_MODE_P52V48_4K: guest_pa_bits = 52; @@ -318,7 +333,7 @@ static void run_test(enum vm_guest_mode mode, unsigned long iterations, * A little more than 1G of guest page sized pages. Cover the * case where the size is not aligned to 64 pages. */ - guest_num_pages = (1ul << (30 - guest_page_shift)) + 16; + guest_num_pages = (1ul << (DIRTY_MEM_BITS - guest_page_shift)) + 16; #ifdef __s390x__ /* Round up to multiple of 1M (segment size) */ guest_num_pages = (guest_num_pages + 0xff) & ~0xffUL; @@ -344,8 +359,6 @@ static void run_test(enum vm_guest_mode mode, unsigned long iterations, bmap = bitmap_alloc(host_num_pages); host_bmap_track = bitmap_alloc(host_num_pages); - vm = create_vm(mode, VCPU_ID, guest_num_pages, guest_code); - #ifdef USE_CLEAR_DIRTY_LOG struct kvm_enable_cap cap = {}; |