From 1ddd3ea75ac3be79dbd800507dd7e08928bd454d Mon Sep 17 00:00:00 2001 From: Sean Christopherson Date: Wed, 27 Nov 2024 16:55:38 -0800 Subject: [PATCH] KVM: selftests: Compute number of extra pages needed in mmu_stress_test Create mmu_stress_tests's VM with the correct number of extra pages needed to map all of memory in the guest. The bug hasn't been noticed before as the test currently runs only on x86, which maps guest memory with 1GiB pages, i.e. doesn't need much memory in the guest for page tables. Reviewed-by: James Houghton Reviewed-by: Andrew Jones Link: https://lore.kernel.org/r/20241128005547.4077116-8-seanjc@google.com Signed-off-by: Sean Christopherson --- tools/testing/selftests/kvm/mmu_stress_test.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/mmu_stress_test.c b/tools/testing/selftests/kvm/mmu_stress_test.c index 847da23ec1b12..5467b12f59036 100644 --- a/tools/testing/selftests/kvm/mmu_stress_test.c +++ b/tools/testing/selftests/kvm/mmu_stress_test.c @@ -209,7 +209,13 @@ int main(int argc, char *argv[]) vcpus = malloc(nr_vcpus * sizeof(*vcpus)); TEST_ASSERT(vcpus, "Failed to allocate vCPU array"); - vm = vm_create_with_vcpus(nr_vcpus, guest_code, vcpus); + vm = __vm_create_with_vcpus(VM_SHAPE_DEFAULT, nr_vcpus, +#ifdef __x86_64__ + max_mem / SZ_1G, +#else + max_mem / vm_guest_mode_params[VM_MODE_DEFAULT].page_size, +#endif + guest_code, vcpus); max_gpa = vm->max_gfn << vm->page_shift; TEST_ASSERT(max_gpa > (4 * slot_size), "MAXPHYADDR <4gb "); -- 2.47.2