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-rw-r--r--tools/testing/selftests/sgx/test_encl.c141
1 files changed, 141 insertions, 0 deletions
diff --git a/tools/testing/selftests/sgx/test_encl.c b/tools/testing/selftests/sgx/test_encl.c
new file mode 100644
index 000000000..ae791df3e
--- /dev/null
+++ b/tools/testing/selftests/sgx/test_encl.c
@@ -0,0 +1,141 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright(c) 2016-20 Intel Corporation. */
+
+#include <stddef.h>
+#include "defines.h"
+
+/*
+ * Data buffer spanning two pages that will be placed first in .data
+ * segment. Even if not used internally the second page is needed by
+ * external test manipulating page permissions.
+ */
+static uint8_t encl_buffer[8192] = { 1 };
+
+enum sgx_enclu_function {
+ EACCEPT = 0x5,
+ EMODPE = 0x6,
+};
+
+static void do_encl_emodpe(void *_op)
+{
+ struct sgx_secinfo secinfo __aligned(sizeof(struct sgx_secinfo)) = {0};
+ struct encl_op_emodpe *op = _op;
+
+ secinfo.flags = op->flags;
+
+ asm volatile(".byte 0x0f, 0x01, 0xd7"
+ : /* no outputs */
+ : "a" (EMODPE),
+ "b" (&secinfo),
+ "c" (op->epc_addr)
+ : "memory" /* read from secinfo pointer */);
+}
+
+static void do_encl_eaccept(void *_op)
+{
+ struct sgx_secinfo secinfo __aligned(sizeof(struct sgx_secinfo)) = {0};
+ struct encl_op_eaccept *op = _op;
+ int rax;
+
+ secinfo.flags = op->flags;
+
+ asm volatile(".byte 0x0f, 0x01, 0xd7"
+ : "=a" (rax)
+ : "a" (EACCEPT),
+ "b" (&secinfo),
+ "c" (op->epc_addr)
+ : "memory" /* read from secinfo pointer */);
+
+ op->ret = rax;
+}
+
+static void *memcpy(void *dest, const void *src, size_t n)
+{
+ size_t i;
+
+ for (i = 0; i < n; i++)
+ ((char *)dest)[i] = ((char *)src)[i];
+
+ return dest;
+}
+
+static void *memset(void *dest, int c, size_t n)
+{
+ size_t i;
+
+ for (i = 0; i < n; i++)
+ ((char *)dest)[i] = c;
+
+ return dest;
+}
+
+static void do_encl_init_tcs_page(void *_op)
+{
+ struct encl_op_init_tcs_page *op = _op;
+ void *tcs = (void *)op->tcs_page;
+ uint32_t val_32;
+
+ memset(tcs, 0, 16); /* STATE and FLAGS */
+ memcpy(tcs + 16, &op->ssa, 8); /* OSSA */
+ memset(tcs + 24, 0, 4); /* CSSA */
+ val_32 = 1;
+ memcpy(tcs + 28, &val_32, 4); /* NSSA */
+ memcpy(tcs + 32, &op->entry, 8); /* OENTRY */
+ memset(tcs + 40, 0, 24); /* AEP, OFSBASE, OGSBASE */
+ val_32 = 0xFFFFFFFF;
+ memcpy(tcs + 64, &val_32, 4); /* FSLIMIT */
+ memcpy(tcs + 68, &val_32, 4); /* GSLIMIT */
+ memset(tcs + 72, 0, 4024); /* Reserved */
+}
+
+static void do_encl_op_put_to_buf(void *op)
+{
+ struct encl_op_put_to_buf *op2 = op;
+
+ memcpy(&encl_buffer[0], &op2->value, 8);
+}
+
+static void do_encl_op_get_from_buf(void *op)
+{
+ struct encl_op_get_from_buf *op2 = op;
+
+ memcpy(&op2->value, &encl_buffer[0], 8);
+}
+
+static void do_encl_op_put_to_addr(void *_op)
+{
+ struct encl_op_put_to_addr *op = _op;
+
+ memcpy((void *)op->addr, &op->value, 8);
+}
+
+static void do_encl_op_get_from_addr(void *_op)
+{
+ struct encl_op_get_from_addr *op = _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 *) = {
+ do_encl_op_put_to_buf,
+ do_encl_op_get_from_buf,
+ do_encl_op_put_to_addr,
+ do_encl_op_get_from_addr,
+ do_encl_op_nop,
+ do_encl_eaccept,
+ do_encl_emodpe,
+ do_encl_init_tcs_page,
+ };
+
+ struct encl_op_header *op = (struct encl_op_header *)rdi;
+
+ if (op->type < ENCL_OP_MAX)
+ (*encl_op_array[op->type])(op);
+}