diff options
Diffstat (limited to 'tools/testing/selftests/kvm/s390x')
| -rw-r--r-- | tools/testing/selftests/kvm/s390x/memop.c | 137 |
1 files changed, 124 insertions, 13 deletions
diff --git a/tools/testing/selftests/kvm/s390x/memop.c b/tools/testing/selftests/kvm/s390x/memop.c index 42282663b38b..b04c2c1b3c30 100644 --- a/tools/testing/selftests/kvm/s390x/memop.c +++ b/tools/testing/selftests/kvm/s390x/memop.c @@ -422,6 +422,46 @@ static void test_copy_key_fetch_prot(void) kvm_vm_free(t.kvm_vm); } +#define ERR_PROT_MOP(...) \ +({ \ + int rv; \ + \ + rv = ERR_MOP(__VA_ARGS__); \ + TEST_ASSERT(rv == 4, "Should result in protection exception"); \ +}) + +static void test_errors_key(void) +{ + struct test_default t = test_default_init(guest_copy_key_fetch_prot); + + HOST_SYNC(t.vcpu, STAGE_INITED); + HOST_SYNC(t.vcpu, STAGE_SKEYS_SET); + + /* vm/vcpu, mismatching keys, fetch protection in effect */ + CHECK_N_DO(ERR_PROT_MOP, t.vcpu, LOGICAL, WRITE, mem1, t.size, GADDR_V(mem1), KEY(2)); + CHECK_N_DO(ERR_PROT_MOP, t.vcpu, LOGICAL, READ, mem2, t.size, GADDR_V(mem2), KEY(2)); + CHECK_N_DO(ERR_PROT_MOP, t.vm, ABSOLUTE, WRITE, mem1, t.size, GADDR_V(mem1), KEY(2)); + CHECK_N_DO(ERR_PROT_MOP, t.vm, ABSOLUTE, READ, mem2, t.size, GADDR_V(mem2), KEY(2)); + + kvm_vm_free(t.kvm_vm); +} + +static void test_errors_key_storage_prot_override(void) +{ + struct test_default t = test_default_init(guest_copy_key_fetch_prot); + + HOST_SYNC(t.vcpu, STAGE_INITED); + t.run->s.regs.crs[0] |= CR0_STORAGE_PROTECTION_OVERRIDE; + t.run->kvm_dirty_regs = KVM_SYNC_CRS; + HOST_SYNC(t.vcpu, STAGE_SKEYS_SET); + + /* vm, mismatching keys, storage protection override not applicable to vm */ + CHECK_N_DO(ERR_PROT_MOP, t.vm, ABSOLUTE, WRITE, mem1, t.size, GADDR_V(mem1), KEY(2)); + CHECK_N_DO(ERR_PROT_MOP, t.vm, ABSOLUTE, READ, mem2, t.size, GADDR_V(mem2), KEY(2)); + + kvm_vm_free(t.kvm_vm); +} + const uint64_t last_page_addr = -PAGE_SIZE; static void guest_copy_key_fetch_prot_override(void) @@ -481,6 +521,58 @@ out: kvm_vm_free(t.kvm_vm); } +static void test_errors_key_fetch_prot_override_not_enabled(void) +{ + struct test_default t = test_default_init(guest_copy_key_fetch_prot_override); + vm_vaddr_t guest_0_page, guest_last_page; + + guest_0_page = vm_vaddr_alloc(t.kvm_vm, PAGE_SIZE, 0); + guest_last_page = vm_vaddr_alloc(t.kvm_vm, PAGE_SIZE, last_page_addr); + if (guest_0_page != 0 || guest_last_page != last_page_addr) { + print_skip("did not allocate guest pages at required positions"); + goto out; + } + HOST_SYNC(t.vcpu, STAGE_INITED); + HOST_SYNC(t.vcpu, STAGE_SKEYS_SET); + + /* vcpu, mismatching keys on fetch, fetch protection override not enabled */ + CHECK_N_DO(ERR_PROT_MOP, t.vcpu, LOGICAL, READ, mem2, 2048, GADDR_V(0), KEY(2)); + +out: + kvm_vm_free(t.kvm_vm); +} + +static void test_errors_key_fetch_prot_override_enabled(void) +{ + struct test_default t = test_default_init(guest_copy_key_fetch_prot_override); + vm_vaddr_t guest_0_page, guest_last_page; + + guest_0_page = vm_vaddr_alloc(t.kvm_vm, PAGE_SIZE, 0); + guest_last_page = vm_vaddr_alloc(t.kvm_vm, PAGE_SIZE, last_page_addr); + if (guest_0_page != 0 || guest_last_page != last_page_addr) { + print_skip("did not allocate guest pages at required positions"); + goto out; + } + HOST_SYNC(t.vcpu, STAGE_INITED); + t.run->s.regs.crs[0] |= CR0_FETCH_PROTECTION_OVERRIDE; + t.run->kvm_dirty_regs = KVM_SYNC_CRS; + HOST_SYNC(t.vcpu, STAGE_SKEYS_SET); + + /* + * vcpu, mismatching keys on fetch, + * fetch protection override does not apply because memory range acceeded + */ + CHECK_N_DO(ERR_PROT_MOP, t.vcpu, LOGICAL, READ, mem2, 2048 + 1, GADDR_V(0), KEY(2)); + CHECK_N_DO(ERR_PROT_MOP, t.vcpu, LOGICAL, READ, mem2, PAGE_SIZE + 2048 + 1, + GADDR_V(guest_last_page), KEY(2)); + /* vm, fetch protected override does not apply */ + CHECK_N_DO(ERR_PROT_MOP, t.vm, ABSOLUTE, READ, mem2, 2048, GADDR(0), KEY(2)); + CHECK_N_DO(ERR_PROT_MOP, t.vm, ABSOLUTE, READ, mem2, 2048, GADDR_V(guest_0_page), KEY(2)); + +out: + kvm_vm_free(t.kvm_vm); +} + static void guest_idle(void) { GUEST_SYNC(STAGE_INITED); /* for consistency's sake */ @@ -488,39 +580,54 @@ static void guest_idle(void) GUEST_SYNC(STAGE_IDLED); } -static void test_errors(void) +static void _test_errors_common(struct test_vcpu vcpu, enum mop_target target, int size) { - struct test_default t = test_default_init(guest_idle); int rv; - HOST_SYNC(t.vcpu, STAGE_INITED); - /* Bad size: */ - rv = ERR_MOP(t.vcpu, LOGICAL, WRITE, mem1, -1, GADDR_V(mem1)); + rv = ERR_MOP(vcpu, target, WRITE, mem1, -1, GADDR_V(mem1)); TEST_ASSERT(rv == -1 && errno == E2BIG, "ioctl allows insane sizes"); /* Zero size: */ - rv = ERR_MOP(t.vcpu, LOGICAL, WRITE, mem1, 0, GADDR_V(mem1)); + rv = ERR_MOP(vcpu, target, WRITE, mem1, 0, GADDR_V(mem1)); TEST_ASSERT(rv == -1 && (errno == EINVAL || errno == ENOMEM), "ioctl allows 0 as size"); /* Bad flags: */ - rv = ERR_MOP(t.vcpu, LOGICAL, WRITE, mem1, t.size, GADDR_V(mem1), SET_FLAGS(-1)); + rv = ERR_MOP(vcpu, target, WRITE, mem1, size, GADDR_V(mem1), SET_FLAGS(-1)); TEST_ASSERT(rv == -1 && errno == EINVAL, "ioctl allows all flags"); - /* Bad operation: */ - rv = ERR_MOP(t.vcpu, INVALID, WRITE, mem1, t.size, GADDR_V(mem1)); - TEST_ASSERT(rv == -1 && errno == EINVAL, "ioctl allows bad operations"); - /* Bad guest address: */ - rv = ERR_MOP(t.vcpu, LOGICAL, WRITE, mem1, t.size, GADDR((void *)~0xfffUL), CHECK_ONLY); + rv = ERR_MOP(vcpu, target, WRITE, mem1, size, GADDR((void *)~0xfffUL), CHECK_ONLY); TEST_ASSERT(rv > 0, "ioctl does not report bad guest memory access"); /* Bad host address: */ - rv = ERR_MOP(t.vcpu, LOGICAL, WRITE, 0, t.size, GADDR_V(mem1)); + rv = ERR_MOP(vcpu, target, WRITE, 0, size, GADDR_V(mem1)); TEST_ASSERT(rv == -1 && errno == EFAULT, "ioctl does not report bad host memory address"); + /* Bad key: */ + rv = ERR_MOP(vcpu, target, WRITE, mem1, size, GADDR_V(mem1), KEY(17)); + TEST_ASSERT(rv == -1 && errno == EINVAL, "ioctl allows invalid key"); +} + +static void test_errors(void) +{ + struct test_default t = test_default_init(guest_idle); + int rv; + + HOST_SYNC(t.vcpu, STAGE_INITED); + + _test_errors_common(t.vcpu, LOGICAL, t.size); + _test_errors_common(t.vm, ABSOLUTE, t.size); + + /* Bad operation: */ + rv = ERR_MOP(t.vcpu, INVALID, WRITE, mem1, t.size, GADDR_V(mem1)); + TEST_ASSERT(rv == -1 && errno == EINVAL, "ioctl allows bad operations"); + /* virtual addresses are not translated when passing INVALID */ + rv = ERR_MOP(t.vm, INVALID, WRITE, mem1, PAGE_SIZE, GADDR(0)); + TEST_ASSERT(rv == -1 && errno == EINVAL, "ioctl allows bad operations"); + /* Bad access register: */ t.run->psw_mask &= ~(3UL << (63 - 17)); t.run->psw_mask |= 1UL << (63 - 17); /* Enable AR mode */ @@ -560,6 +667,10 @@ int main(int argc, char *argv[]) test_copy_key_storage_prot_override(); test_copy_key_fetch_prot(); test_copy_key_fetch_prot_override(); + test_errors_key(); + test_errors_key_storage_prot_override(); + test_errors_key_fetch_prot_override_not_enabled(); + test_errors_key_fetch_prot_override_enabled(); } else { print_skip("storage key memop extension not supported"); } |