Signed-off-by: Oliver Upton oliver.upton@linux.dev --- tools/testing/selftests/kvm/.gitignore | 1 + tools/testing/selftests/kvm/Makefile | 1 + .../selftests/kvm/aarch64/user_hypercalls.c | 130 ++++++++++++++++++ 3 files changed, 132 insertions(+) create mode 100644 tools/testing/selftests/kvm/aarch64/user_hypercalls.c

diff --git a/tools/testing/selftests/kvm/.gitignore b/tools/testing/selftests/kvm/.gitignore index 2f0d705db9db..4f45e987985f 100644 --- a/tools/testing/selftests/kvm/.gitignore +++ b/tools/testing/selftests/kvm/.gitignore @@ -5,6 +5,7 @@ /aarch64/get-reg-list /aarch64/hypercalls /aarch64/psci_test +/aarch64/user_hypercalls /aarch64/vcpu_width_config /aarch64/vgic_init /aarch64/vgic_irq diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile index 0172eb6cb6ee..8ac1988ea669 100644 --- a/tools/testing/selftests/kvm/Makefile +++ b/tools/testing/selftests/kvm/Makefile @@ -153,6 +153,7 @@ TEST_GEN_PROGS_aarch64 += aarch64/debug-exceptions TEST_GEN_PROGS_aarch64 += aarch64/get-reg-list TEST_GEN_PROGS_aarch64 += aarch64/hypercalls TEST_GEN_PROGS_aarch64 += aarch64/psci_test +TEST_GEN_PROGS_aarch64 += aarch64/user_hypercalls TEST_GEN_PROGS_aarch64 += aarch64/vcpu_width_config TEST_GEN_PROGS_aarch64 += aarch64/vgic_init TEST_GEN_PROGS_aarch64 += aarch64/vgic_irq diff --git a/tools/testing/selftests/kvm/aarch64/user_hypercalls.c b/tools/testing/selftests/kvm/aarch64/user_hypercalls.c new file mode 100644 index 000000000000..94ac821c5474 --- /dev/null +++ b/tools/testing/selftests/kvm/aarch64/user_hypercalls.c @@ -0,0 +1,130 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include <linux/arm-smccc.h> + +#include "kvm_util.h" +#include "processor.h" +#include "test_util.h" + +struct test_case { + uint64_t cap; + uint32_t function; + uint64_t args[6]; +}; + +#define TEST_OWNER(name) \ +{ \ + .cap = BIT_ULL(KVM_ARM_USER_HYPERCALL_OWNER_ ## name), \ + .function = ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_32, \ + ARM_SMCCC_OWNER_ ## name, \ + 0), \ + .args = { \ + __LINE__, \ + __LINE__ + 1, \ + __LINE__ + 2, \ + __LINE__ + 3, \ + __LINE__ + 4, \ + __LINE__ + 5, \ + }, \ +}, \ +{ \ + .cap = BIT_ULL(KVM_ARM_USER_HYPERCALL_OWNER_ ## name), \ + .function = ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, \ + ARM_SMCCC_SMC_64, \ + ARM_SMCCC_OWNER_ ## name, \ + 0), \ + .args = { \ + __LINE__, \ + __LINE__ + 1, \ + __LINE__ + 2, \ + __LINE__ + 3, \ + __LINE__ + 4, \ + __LINE__ + 5, \ + }, \ +} \ + +static struct test_case test_cases[] = { + TEST_OWNER(ARCH), + TEST_OWNER(CPU), + TEST_OWNER(SIP), + TEST_OWNER(OEM), + TEST_OWNER(STANDARD), + TEST_OWNER(STANDARD_HYP), + TEST_OWNER(VENDOR_HYP), + TEST_OWNER(TRUSTED_APP), + TEST_OWNER(TRUSTED_OS), +}; + +static void guest_main(const struct test_case *test) +{ + struct arm_smccc_res unused; + + smccc_hvc(test->function, test->args[0], test->args[1], test->args[2], + test->args[3], test->args[4], test->args[5], 0, &unused); + + GUEST_ASSERT(0); +} + +static void handle_hvc(const struct test_case *test, struct kvm_vcpu *vcpu) +{ + struct kvm_run *run = vcpu->run; + + TEST_ASSERT(run->hypercall.nr == test->function, + "unexpected function ID: %llx (expected %x)", + run->hypercall.nr, test->function); + + TEST_ASSERT(!memcmp(&run->hypercall.args, &test->args, sizeof(test->args)), + "unexpected hypercall arguments"); +} + +static void handle_ucall(struct kvm_vcpu *vcpu) +{ + struct ucall uc; + + switch (get_ucall(vcpu, &uc)) { + case UCALL_ABORT: + REPORT_GUEST_ASSERT(uc); + break; + default: + TEST_FAIL("unhandled ucall: %lu", uc.cmd); + } +} + +static void run_test(const struct test_case *test) +{ + struct kvm_vcpu *vcpu; + struct kvm_vm *vm; + + vm = vm_create_with_one_vcpu(&vcpu, guest_main); + vm_enable_cap(vm, KVM_CAP_ARM_USER_HYPERCALLS, test->cap); + ucall_init(vm, NULL); + + vcpu_args_set(vcpu, 1, test); + + vcpu_run(vcpu); + switch (vcpu->run->exit_reason) { + case KVM_EXIT_HYPERCALL: + handle_hvc(test, vcpu); + break; + case KVM_EXIT_MMIO: + handle_ucall(vcpu); + break; + default: + TEST_FAIL("unhandled exit reason: %u (%s)", vcpu->run->exit_reason, + exit_reason_str(vcpu->run->exit_reason)); + } + + ucall_uninit(vm); + kvm_vm_free(vm); +} + +int main(void) +{ + int i; + + TEST_REQUIRE(kvm_has_cap(KVM_CAP_ARM_USER_HYPERCALLS)); + + for (i = 0; i < ARRAY_SIZE(test_cases); i++) + run_test(&test_cases[i]); +}