diff mbox series

[v3,08/14] KVM: selftests: Compute number of extra pages needed in mmu_stress_test

Message ID 20241009154953.1073471-9-seanjc@google.com
State Accepted
Headers show
Series [v3,01/14] KVM: Move KVM_REG_SIZE() definition to common uAPI header | expand

Commit Message

Sean Christopherson Oct. 9, 2024, 3:49 p.m. UTC 
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 <jthoughton@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
 tools/testing/selftests/kvm/mmu_stress_test.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/tools/testing/selftests/kvm/mmu_stress_test.c b/tools/testing/selftests/kvm/mmu_stress_test.c
index 847da23ec1b1..5467b12f5903 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 ");