[PATCH V3 09/13] selftests/sgx: Provide per-op parameter structs for the test enclave

From: Reinette Chatre
Date: Mon Nov 15 2021 - 17:52:52 EST

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From: Jarkko Sakkinen <jarkko@xxxxxxxxxx>

To add more operations to the test enclave, the protocol needs to allow
to have operations with varying parameters. Create a separate parameter
struct for each existing operation, with the shared parameters in struct
encl_op_header.

Signed-off-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
Acked-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
[reinette: rebased to apply on top of oversubscription test series]
Signed-off-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
---
Changes since V1:
- Add signature from Dave.

tools/testing/selftests/sgx/defines.h | 14 ++++-
tools/testing/selftests/sgx/main.c | 68 +++++++++++++------------
tools/testing/selftests/sgx/test_encl.c | 33 +++++++-----
3 files changed, 69 insertions(+), 46 deletions(-)

diff --git a/tools/testing/selftests/sgx/defines.h b/tools/testing/selftests/sgx/defines.h
index f88562afcaa0..6ff95a766287 100644
--- a/tools/testing/selftests/sgx/defines.h
+++ b/tools/testing/selftests/sgx/defines.h
@@ -21,11 +21,21 @@
enum encl_op_type {
ENCL_OP_PUT,
ENCL_OP_GET,
+ ENCL_OP_MAX,
};

-struct encl_op {
+struct encl_op_header {
uint64_t type;
- uint64_t buffer;
+};
+
+struct encl_op_put {
+ struct encl_op_header header;
+ uint64_t value;
+};
+
+struct encl_op_get {
+ struct encl_op_header header;
+ uint64_t value;
};

#endif /* DEFINES_H */
diff --git a/tools/testing/selftests/sgx/main.c b/tools/testing/selftests/sgx/main.c
index ee8139a22a3c..3996c00486b6 100644
--- a/tools/testing/selftests/sgx/main.c
+++ b/tools/testing/selftests/sgx/main.c
@@ -220,27 +220,28 @@ FIXTURE_TEARDOWN(enclave)

TEST_F(enclave, unclobbered_vdso)
{
- struct encl_op op;
+ struct encl_op_put put_op;
+ struct encl_op_get get_op;

ASSERT_TRUE(setup_test_encl(ENCL_HEAP_SIZE_DEFAULT, &self->encl, _metadata));

memset(&self->run, 0, sizeof(self->run));
self->run.tcs = self->encl.encl_base;

- op.type = ENCL_OP_PUT;
- op.buffer = MAGIC;
+ put_op.header.type = ENCL_OP_PUT;
+ put_op.value = MAGIC;

- EXPECT_EQ(ENCL_CALL(&op, &self->run, false), 0);
+ EXPECT_EQ(ENCL_CALL(&put_op, &self->run, false), 0);

EXPECT_EEXIT(&self->run);
EXPECT_EQ(self->run.user_data, 0);

- op.type = ENCL_OP_GET;
- op.buffer = 0;
+ get_op.header.type = ENCL_OP_GET;
+ get_op.value = 0;

- EXPECT_EQ(ENCL_CALL(&op, &self->run, false), 0);
+ EXPECT_EQ(ENCL_CALL(&get_op, &self->run, false), 0);

- EXPECT_EQ(op.buffer, MAGIC);
+ EXPECT_EQ(get_op.value, MAGIC);
EXPECT_EEXIT(&self->run);
EXPECT_EQ(self->run.user_data, 0);
}
@@ -292,7 +293,8 @@ static unsigned long get_total_epc_mem(void)
TEST_F(enclave, unclobbered_vdso_oversubscribed)
{
unsigned long total_mem;
- struct encl_op op;
+ struct encl_op_put put_op;
+ struct encl_op_get get_op;

total_mem = get_total_epc_mem();
ASSERT_NE(total_mem, 0);
@@ -301,20 +303,20 @@ TEST_F(enclave, unclobbered_vdso_oversubscribed)
memset(&self->run, 0, sizeof(self->run));
self->run.tcs = self->encl.encl_base;

- op.type = ENCL_OP_PUT;
- op.buffer = MAGIC;
+ put_op.header.type = ENCL_OP_PUT;
+ put_op.value = MAGIC;

- EXPECT_EQ(ENCL_CALL(&op, &self->run, false), 0);
+ EXPECT_EQ(ENCL_CALL(&put_op, &self->run, false), 0);

EXPECT_EEXIT(&self->run);
EXPECT_EQ(self->run.user_data, 0);

- op.type = ENCL_OP_GET;
- op.buffer = 0;
+ get_op.header.type = ENCL_OP_GET;
+ get_op.value = 0;

- EXPECT_EQ(ENCL_CALL(&op, &self->run, false), 0);
+ EXPECT_EQ(ENCL_CALL(&get_op, &self->run, false), 0);

- EXPECT_EQ(op.buffer, MAGIC);
+ EXPECT_EQ(get_op.value, MAGIC);
EXPECT_EEXIT(&self->run);
EXPECT_EQ(self->run.user_data, 0);

@@ -322,27 +324,28 @@ TEST_F(enclave, unclobbered_vdso_oversubscribed)

TEST_F(enclave, clobbered_vdso)
{
- struct encl_op op;
+ struct encl_op_put put_op;
+ struct encl_op_get get_op;

ASSERT_TRUE(setup_test_encl(ENCL_HEAP_SIZE_DEFAULT, &self->encl, _metadata));

memset(&self->run, 0, sizeof(self->run));
self->run.tcs = self->encl.encl_base;

- op.type = ENCL_OP_PUT;
- op.buffer = MAGIC;
+ put_op.header.type = ENCL_OP_PUT;
+ put_op.value = MAGIC;

- EXPECT_EQ(ENCL_CALL(&op, &self->run, true), 0);
+ EXPECT_EQ(ENCL_CALL(&put_op, &self->run, true), 0);

EXPECT_EEXIT(&self->run);
EXPECT_EQ(self->run.user_data, 0);

- op.type = ENCL_OP_GET;
- op.buffer = 0;
+ get_op.header.type = ENCL_OP_GET;
+ get_op.value = 0;

- EXPECT_EQ(ENCL_CALL(&op, &self->run, true), 0);
+ EXPECT_EQ(ENCL_CALL(&get_op, &self->run, true), 0);

- EXPECT_EQ(op.buffer, MAGIC);
+ EXPECT_EQ(get_op.value, MAGIC);
EXPECT_EEXIT(&self->run);
EXPECT_EQ(self->run.user_data, 0);
}
@@ -357,7 +360,8 @@ static int test_handler(long rdi, long rsi, long rdx, long ursp, long r8, long r

TEST_F(enclave, clobbered_vdso_and_user_function)
{
- struct encl_op op;
+ struct encl_op_put put_op;
+ struct encl_op_get get_op;

ASSERT_TRUE(setup_test_encl(ENCL_HEAP_SIZE_DEFAULT, &self->encl, _metadata));

@@ -367,20 +371,20 @@ TEST_F(enclave, clobbered_vdso_and_user_function)
self->run.user_handler = (__u64)test_handler;
self->run.user_data = 0xdeadbeef;

- op.type = ENCL_OP_PUT;
- op.buffer = MAGIC;
+ put_op.header.type = ENCL_OP_PUT;
+ put_op.value = MAGIC;

- EXPECT_EQ(ENCL_CALL(&op, &self->run, true), 0);
+ EXPECT_EQ(ENCL_CALL(&put_op, &self->run, true), 0);

EXPECT_EEXIT(&self->run);
EXPECT_EQ(self->run.user_data, 0);

- op.type = ENCL_OP_GET;
- op.buffer = 0;
+ get_op.header.type = ENCL_OP_GET;
+ get_op.value = 0;

- EXPECT_EQ(ENCL_CALL(&op, &self->run, true), 0);
+ EXPECT_EQ(ENCL_CALL(&get_op, &self->run, true), 0);

- EXPECT_EQ(op.buffer, MAGIC);
+ EXPECT_EQ(get_op.value, MAGIC);
EXPECT_EEXIT(&self->run);
EXPECT_EQ(self->run.user_data, 0);
}
diff --git a/tools/testing/selftests/sgx/test_encl.c b/tools/testing/selftests/sgx/test_encl.c
index 734ea52f9924..f11eb8315704 100644
--- a/tools/testing/selftests/sgx/test_encl.c
+++ b/tools/testing/selftests/sgx/test_encl.c
@@ -16,20 +16,29 @@ static void *memcpy(void *dest, const void *src, size_t n)
return dest;
}

-void encl_body(void *rdi, void *rsi)
+static void do_encl_op_put(void *op)
+{
+ struct encl_op_put *op2 = op;
+
+ memcpy(&encl_buffer[0], &op2->value, 8);
+}
+
+static void do_encl_op_get(void *op)
{
- struct encl_op *op = (struct encl_op *)rdi;
+ struct encl_op_get *op2 = op;

- switch (op->type) {
- case ENCL_OP_PUT:
- memcpy(&encl_buffer[0], &op->buffer, 8);
- break;
+ memcpy(&op2->value, &encl_buffer[0], 8);
+}
+
+void encl_body(void *rdi, void *rsi)
+{
+ const void (*encl_op_array[ENCL_OP_MAX])(void *) = {
+ do_encl_op_put,
+ do_encl_op_get,
+ };

- case ENCL_OP_GET:
- memcpy(&op->buffer, &encl_buffer[0], 8);
- break;
+ struct encl_op_header *op = (struct encl_op_header *)rdi;

- default:
- break;
- }
+ if (op->type < ENCL_OP_MAX)
+ (*encl_op_array[op->type])(op);
}
--
2.25.1

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