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| author |   Oliver Upton <oliver.upton@linux.dev> | 2023-04-08 12:17:32 +0000 |
|---|---|---|
| committer |   Marc Zyngier <maz@kernel.org> | 2023-04-08 15:22:55 +0100 |
| commit | 00e0c947118f456b622c1f2ca316c116dfb4e12c (patch) | |
| tree | cfcffd0cff6cf07d147b11537adca8842908a32e | |
| parent | KVM: arm64: Prevent userspace from handling SMC64 arch range (diff) | |
| download | wireguard-linux-00e0c947118f456b622c1f2ca316c116dfb4e12c.tar.xz wireguard-linux-00e0c947118f456b622c1f2ca316c116dfb4e12c.zip | |
KVM: arm64: Test that SMC64 arch calls are reserved
Assert that the SMC64 view of the Arm architecture range is reserved by
KVM and cannot be filtered by userspace.
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230408121732.3411329-3-oliver.upton@linux.dev
| -rw-r--r-- | tools/testing/selftests/kvm/aarch64/smccc_filter.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/aarch64/smccc_filter.c b/tools/testing/selftests/kvm/aarch64/smccc_filter.c index 0f9db0641847..dab671fdf239 100644 --- a/tools/testing/selftests/kvm/aarch64/smccc_filter.c +++ b/tools/testing/selftests/kvm/aarch64/smccc_filter.c @@ -99,6 +99,7 @@ static void test_filter_reserved_range(void) { struct kvm_vcpu *vcpu; struct kvm_vm *vm = setup_vm(&vcpu); + uint32_t smc64_fn; int r; r = __set_smccc_filter(vm, ARM_SMCCC_ARCH_WORKAROUND_1, @@ -106,6 +107,13 @@ static void test_filter_reserved_range(void) TEST_ASSERT(r < 0 && errno == EEXIST, "Attempt to filter reserved range should return EEXIST"); + smc64_fn = ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_64, + 0, 0); + + r = __set_smccc_filter(vm, smc64_fn, 1, KVM_SMCCC_FILTER_DENY); + TEST_ASSERT(r < 0 && errno == EEXIST, + "Attempt to filter reserved range should return EEXIST"); + kvm_vm_free(vm); } |