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| author | Yosry Ahmed <yosry.ahmed@linux.dev> | 2025-12-31 02:01:31 +0300 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2026-01-08 23:02:05 +0300 |
| commit | 97dfbdfea405a0820ccfcf00afdda4c0f47c3df8 (patch) | |
| tree | 9044cc0819d32b00905e7b89d171c02ffa75342c | |
| parent | 69e81ed5e6a59c12c0c6756c3f0524e2ddb023f4 (diff) | |
| download | linux-97dfbdfea405a0820ccfcf00afdda4c0f47c3df8.tar.xz | |
KVM: selftests: Stop passing a memslot to nested_map_memslot()
On x86, KVM selftests use memslot 0 for all the default regions used by
the test infrastructure. This is an implementation detail.
nested_map_memslot() is currently used to map the default regions by
explicitly passing slot 0, which leaks the library implementation into
the caller.
Rename the function to a very verbose
nested_identity_map_default_memslots() to reflect what it actually does.
Add an assertion that only memslot 0 is being used so that the
implementation does not change from under us.
No functional change intended.
Signed-off-by: Yosry Ahmed <yosry.ahmed@linux.dev>
Link: https://patch.msgid.link/20251230230150.4150236-3-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
| -rw-r--r-- | tools/testing/selftests/kvm/include/x86/vmx.h | 4 | ||||
| -rw-r--r-- | tools/testing/selftests/kvm/lib/x86/vmx.c | 12 | ||||
| -rw-r--r-- | tools/testing/selftests/kvm/x86/vmx_dirty_log_test.c | 2 |
3 files changed, 11 insertions, 7 deletions
diff --git a/tools/testing/selftests/kvm/include/x86/vmx.h b/tools/testing/selftests/kvm/include/x86/vmx.h index 96e2b4c630a9..91916b8aa94b 100644 --- a/tools/testing/selftests/kvm/include/x86/vmx.h +++ b/tools/testing/selftests/kvm/include/x86/vmx.h @@ -563,8 +563,8 @@ void nested_pg_map(struct vmx_pages *vmx, struct kvm_vm *vm, uint64_t nested_paddr, uint64_t paddr); void nested_map(struct vmx_pages *vmx, struct kvm_vm *vm, uint64_t nested_paddr, uint64_t paddr, uint64_t size); -void nested_map_memslot(struct vmx_pages *vmx, struct kvm_vm *vm, - uint32_t memslot); +void nested_identity_map_default_memslots(struct vmx_pages *vmx, + struct kvm_vm *vm); void nested_identity_map_1g(struct vmx_pages *vmx, struct kvm_vm *vm, uint64_t addr, uint64_t size); bool kvm_cpu_has_ept(void); diff --git a/tools/testing/selftests/kvm/lib/x86/vmx.c b/tools/testing/selftests/kvm/lib/x86/vmx.c index 29b082a58daa..eec33ec63811 100644 --- a/tools/testing/selftests/kvm/lib/x86/vmx.c +++ b/tools/testing/selftests/kvm/lib/x86/vmx.c @@ -494,12 +494,16 @@ void nested_map(struct vmx_pages *vmx, struct kvm_vm *vm, /* Prepare an identity extended page table that maps all the * physical pages in VM. */ -void nested_map_memslot(struct vmx_pages *vmx, struct kvm_vm *vm, - uint32_t memslot) +void nested_identity_map_default_memslots(struct vmx_pages *vmx, + struct kvm_vm *vm) { + uint32_t s, memslot = 0; sparsebit_idx_t i, last; - struct userspace_mem_region *region = - memslot2region(vm, memslot); + struct userspace_mem_region *region = memslot2region(vm, memslot); + + /* Only memslot 0 is mapped here, ensure it's the only one being used */ + for (s = 0; s < NR_MEM_REGIONS; s++) + TEST_ASSERT_EQ(vm->memslots[s], 0); i = (region->region.guest_phys_addr >> vm->page_shift) - 1; last = i + (region->region.memory_size >> vm->page_shift); diff --git a/tools/testing/selftests/kvm/x86/vmx_dirty_log_test.c b/tools/testing/selftests/kvm/x86/vmx_dirty_log_test.c index 98cb6bdab3e6..aab7333aaef0 100644 --- a/tools/testing/selftests/kvm/x86/vmx_dirty_log_test.c +++ b/tools/testing/selftests/kvm/x86/vmx_dirty_log_test.c @@ -121,7 +121,7 @@ static void test_vmx_dirty_log(bool enable_ept) */ if (enable_ept) { prepare_eptp(vmx, vm); - nested_map_memslot(vmx, vm, 0); + nested_identity_map_default_memslots(vmx, vm); nested_map(vmx, vm, NESTED_TEST_MEM1, GUEST_TEST_MEM, PAGE_SIZE); nested_map(vmx, vm, NESTED_TEST_MEM2, GUEST_TEST_MEM, PAGE_SIZE); } |