[PATCH] selftests/sgx: Fix corrupted cpuid macro invocation

From: Jarkko Sakkinen <jarkko@kernel.org>
To: Shuah Khan <shuah@kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>,
	Reinette Chatre <reinette.chatre@intel.com>,
	linux-kselftest@vger.kernel.org, linux-sgx@vger.kernel.org,
	Jarkko Sakkinen <jarkko@kernel.org>
Subject: [PATCH] selftests/sgx: Fix corrupted cpuid macro invocation
Date: Sat,  4 Dec 2021 22:23:55 +0200	[thread overview]
Message-ID: <20211204202355.23005-1-jarkko@kernel.org> (raw)

Compilation results:

$ make -C tools/testing/selftests/sgx/
make: Entering directory '/home/jarkko/Projects/linux-sgx/tools/testing/selftests/sgx'
gcc -Wall -Werror -g -I../../../../tools/include -fPIC -z noexecstack -c main.c -o /home/jarkko/Projects/linux-sgx/tools/testing/selftests/sgx/main.o
main.c: In function ‘get_total_epc_mem’:
main.c:296:17: error: implicit declaration of function ‘__cpuid’ [-Werror=implicit-function-declaration]
  296 |                 __cpuid(&eax, &ebx, &ecx, &edx);
      |                 ^~~~~~~
cc1: all warnings being treated as errors
make: *** [Makefile:33: /home/jarkko/Projects/linux-sgx/tools/testing/selftests/sgx/main.o] Error 1
make: Leaving directory '/home/jarkko/Projects/linux-sgx/tools/testing/selftests/sgx'

Include to cpuid.h is missing and the macro usage is incorrect.

Include cpuid.h and use __cpuid_count() macro in order to fix the
compilation issue.

Fixes: f0ff2447b861 ("selftests/sgx: Add a new kselftest: Unclobbered_vdso_oversubscribed")
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
---
 tools/testing/selftests/sgx/main.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/sgx/main.c b/tools/testing/selftests/sgx/main.c
index 7e912db4c6c5..370c4995f7c4 100644
--- a/tools/testing/selftests/sgx/main.c
+++ b/tools/testing/selftests/sgx/main.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 /*  Copyright(c) 2016-20 Intel Corporation. */
 
+#include <cpuid.h>
 #include <elf.h>
 #include <errno.h>
 #include <fcntl.h>
@@ -291,9 +292,7 @@ static unsigned long get_total_epc_mem(void)
 	int section = 0;
 
 	while (true) {
-		eax = SGX_CPUID;
-		ecx = section + SGX_CPUID_EPC;
-		__cpuid(&eax, &ebx, &ecx, &edx);
+		__cpuid_count(SGX_CPUID, section + SGX_CPUID_EPC, eax, ebx, ecx, edx);
 
 		type = eax & SGX_CPUID_EPC_MASK;
 		if (type == SGX_CPUID_EPC_INVALID)
-- 
2.32.0

