[tip: x86/sgx] selftests/sgx: Remove redundant enclave base address save/restore

[tip-bot2 for Jo Van Bulck]

The following commit has been merged into the x86/sgx branch of tip:

Commit-ID:     4f812df8f37463767c2a74c2bd77de94acdb2be6
Gitweb:        https://git.kernel.org/tip/4f812df8f37463767c2a74c2bd77de94acdb2be6
Author:        Jo Van Bulck <jo.vanbulck@xxxxxxxxxxxxxx>
AuthorDate:    Thu, 05 Oct 2023 17:38:47 +02:00
Committer:     Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
CommitterDate: Fri, 08 Dec 2023 10:05:27 -08:00

selftests/sgx: Remove redundant enclave base address save/restore

Remove redundant push/pop pair that stores and restores the enclave base
address in the test enclave, as it is never used after the pop and can
anyway be easily retrieved via the __encl_base symbol.

Signed-off-by: Jo Van Bulck <jo.vanbulck@xxxxxxxxxxxxxx>
Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Reviewed-by: Jarkko Sakkinen <jarkko@xxxxxxxxxx>
Acked-by: Kai Huang <kai.huang@xxxxxxxxx>
Link: https://lore.kernel.org/all/20231005153854.25566-7-jo.vanbulck%40cs.kuleuven.be
---
 tools/testing/selftests/sgx/test_encl_bootstrap.S | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/tools/testing/selftests/sgx/test_encl_bootstrap.S b/tools/testing/selftests/sgx/test_encl_bootstrap.S
index 03ae0f5..e0ce993 100644
--- a/tools/testing/selftests/sgx/test_encl_bootstrap.S
+++ b/tools/testing/selftests/sgx/test_encl_bootstrap.S
@@ -55,12 +55,9 @@ encl_entry_core:
 	push	%rax
 
 	push	%rcx # push the address after EENTER
-	push	%rbx # push the enclave base address
 
 	call	encl_body
 
-	pop	%rbx # pop the enclave base address
-
 	/* Clear volatile GPRs, except RAX (EEXIT function). */
 	xor     %rcx, %rcx
 	xor     %rdx, %rdx