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selftests/sgx: Add test for multiple TCS entry 

commit 688542e29f upstream.

Each thread executing in an enclave is associated with a Thread Control
Structure (TCS). The SGX test enclave contains two hardcoded TCS, thus
supporting two threads in the enclave.

Add a test to ensure it is possible to enter enclave at both entrypoints.

Intel-SIG: commit 688542e29f selftests/sgx: Add test for multiple TCS
entry.
Backport for SGX EDMM support.

Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lkml.kernel.org/r/7be151a57b4c7959a2364753b995e0006efa3da1.1636997631.git.reinette.chatre@intel.com
[ Zhiquan Li: amend commit log ]
Signed-off-by: Zhiquan Li <zhiquan1.li@intel.com>
This commit is contained in:
Reinette Chatre 2021-11-15 10:35:26 -08:00 committed by Jianping Liu
parent a232b35483
commit dc8ef6849c
3 changed files with 39 additions and 0 deletions
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1
tools/testing/selftests/sgx/defines.h
View File

@ -23,6 +23,7 @@ enum encl_op_type {
ENCL_OP_GET_FROM_BUFFER,
ENCL_OP_PUT_TO_ADDRESS,
ENCL_OP_GET_FROM_ADDRESS,
ENCL_OP_NOP,
ENCL_OP_MAX,
};

32
tools/testing/selftests/sgx/main.c
View File

@ -408,6 +408,38 @@ TEST_F(enclave, clobbered_vdso_and_user_function)
EXPECT_EQ(self->run.user_data, 0);
}
/*
* Sanity check that it is possible to enter either of the two hardcoded TCS
*/
TEST_F(enclave, tcs_entry)
{
struct encl_op_header 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_NOP;
EXPECT_EQ(ENCL_CALL(&op, &self->run, true), 0);
EXPECT_EEXIT(&self->run);
EXPECT_EQ(self->run.exception_vector, 0);
EXPECT_EQ(self->run.exception_error_code, 0);
EXPECT_EQ(self->run.exception_addr, 0);
/* Move to the next TCS. */
self->run.tcs = self->encl.encl_base + PAGE_SIZE;
EXPECT_EQ(ENCL_CALL(&op, &self->run, true), 0);
EXPECT_EEXIT(&self->run);
EXPECT_EQ(self->run.exception_vector, 0);
EXPECT_EQ(self->run.exception_error_code, 0);
EXPECT_EQ(self->run.exception_addr, 0);
}
/*
* Second page of .data segment is used to test changing PTE permissions.
* This spans the local encl_buffer within the test enclave.

6
tools/testing/selftests/sgx/test_encl.c
View File

@ -49,6 +49,11 @@ static void do_encl_op_get_from_addr(void *_op)
memcpy(&op->value, (void *)op->addr, 8);
}
static void do_encl_op_nop(void *_op)
{
}
void encl_body(void *rdi, void *rsi)
{
const void (*encl_op_array[ENCL_OP_MAX])(void *) = {
@ -56,6 +61,7 @@ void encl_body(void *rdi, void *rsi)
do_encl_op_get_from_buf,
do_encl_op_put_to_addr,
do_encl_op_get_from_addr,
do_encl_op_nop,
};
struct encl_op_header *op = (struct encl_op_header *)rdi;