On Mon, Nov 07, 2022 at 02:02:11PM -0800, Haitao Huang wrote:
> So we can EACCEPT multiple pages inside enclave without EEXIT,
> preparing for testing with MADV_WILLNEED for ranges bigger than
> a single page.
>
> Signed-off-by: Haitao Huang <haitao.huang@xxxxxxxxxxxxxxx>
> ---
> tools/testing/selftests/sgx/defines.h | 1 +
> tools/testing/selftests/sgx/test_encl.c | 20 ++++++++++++++------
> 2 files changed, 15 insertions(+), 6 deletions(-)
>
> diff --git a/tools/testing/selftests/sgx/defines.h b/tools/testing/selftests/sgx/defines.h
> index d8587c971941..8578e773d3d8 100644
> --- a/tools/testing/selftests/sgx/defines.h
> +++ b/tools/testing/selftests/sgx/defines.h
> @@ -60,6 +60,7 @@ struct encl_op_eaccept {
> struct encl_op_header header;
> uint64_t epc_addr;
> uint64_t flags;
> + uint64_t len;
> uint64_t ret;
> };
>
> diff --git a/tools/testing/selftests/sgx/test_encl.c b/tools/testing/selftests/sgx/test_encl.c
> index c0d6397295e3..fc797385200b 100644
> --- a/tools/testing/selftests/sgx/test_encl.c
> +++ b/tools/testing/selftests/sgx/test_encl.c
> @@ -35,14 +35,22 @@ 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;
Should be empty line after declarations.
> + if (op->len == 0)
> + op->len = 4096;
What is this?
>
> secinfo.flags = op->flags;
> -
> - asm volatile(".byte 0x0f, 0x01, 0xd7"
> - : "=a" (rax)
> - : "a" (EACCEPT),
> - "b" (&secinfo),
> - "c" (op->epc_addr));
> + for (uint64_t addr = op->epc_addr;
> + addr < op->epc_addr + op->len; addr += 4096) {
> + asm volatile(".byte 0x0f, 0x01, 0xd7"
> + : "=a" (rax)
> + : "a" (EACCEPT),
> + "b" (&secinfo),
> + "c" (addr));
> + if (rax) {
> + op->ret = rax;
> + return;
> + }
> + }
>
> op->ret = rax;
> }
> --
> 2.25.1
>
BR, Jarkko
