Re: [PATCH v9 02/19] KVM: selftests: Allocate pgd in virt_map() as necessary

[Binbin Wu]

On 8/21/2025 12:28 PM, Sagi Shahar wrote:

If virt_map() is called before any call to ____vm_vaddr_alloc() it
will create the mapping using an invalid pgd.

Add call to virt_pgd_alloc() as part of virt_map() before creating the
mapping, similarly to ____vm_vaddr_alloc()

Signed-off-by: Sagi Shahar <sa...@google.com>

Reviewed-by: Binbin Wu <binbin...@linux.intel.com>

---
  tools/testing/selftests/kvm/lib/kvm_util.c | 1 +
  1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c 
b/tools/testing/selftests/kvm/lib/kvm_util.c
index c3f5142b0a54..b4c8702ba4bd 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -1609,6 +1609,7 @@ void virt_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t 
paddr,
        TEST_ASSERT(vaddr + size > vaddr, "Vaddr overflow");
        TEST_ASSERT(paddr + size > paddr, "Paddr overflow");

+ virt_pgd_alloc(vm);

        while (npages--) {
                virt_pg_map(vm, vaddr, paddr);
                sparsebit_set(vm->vpages_mapped, vaddr >> vm->page_shift);