| Message ID | 797ff1331cfe540fc378fcc4a4a7b00ff5099fbe.1638905135.git.reinette.chatre@intel.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | selftests/sgx: Fix build error caused by missing dependency | expand |
On Tue, 2021-12-07 at 11:40 -0800, Reinette Chatre wrote: > Commit f0ff2447b861 ("selftests/sgx: Add a new kselftest: > Unclobbered_vdso_oversubscribed") depends on __cpuid() without > providing the dependency and thus introduces a build error: > > $ make > gcc -Wall -Werror -g -I../../../../tools/include -fPIC -z noexecstack -c main.c -o /path/linux/tools/testing/selftests/sgx/main.o > main.c: In function ‘get_total_epc_mem’: > main.c:296:3: 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: /path/linux/tools/testing/selftests/sgx/main.o] Error 1 > $ > > Make the kernel's __cpuid() available locally in support of the > test's usage. It's too abstract, rather "Clone kernel's __cpuid() implementation to the self-test in order to make it available for the EPC enumeration code." > Fixes: f0ff2447b861 ("selftests/sgx: Add a new kselftest: Unclobbered_vdso_oversubscribed") > Reported-by: Jarkko Sakkinen <jarkko@kernel.org> > Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> The code change is acceptable. /Jarkko
Hi Jarkko, On 12/11/2021 12:15 AM, Jarkko Sakkinen wrote: > On Tue, 2021-12-07 at 11:40 -0800, Reinette Chatre wrote: >> Commit f0ff2447b861 ("selftests/sgx: Add a new kselftest: >> Unclobbered_vdso_oversubscribed") depends on __cpuid() without >> providing the dependency and thus introduces a build error: >> >> $ make >> gcc -Wall -Werror -g -I../../../../tools/include -fPIC -z noexecstack -c main.c -o /path/linux/tools/testing/selftests/sgx/main.o >> main.c: In function ‘get_total_epc_mem’: >> main.c:296:3: 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: /path/linux/tools/testing/selftests/sgx/main.o] Error 1 >> $ >> >> Make the kernel's __cpuid() available locally in support of the >> test's usage. > > It's too abstract, rather > > "Clone kernel's __cpuid() implementation to the self-test in order > to make it available for the EPC enumeration code." Will do. Thank you. > >> Fixes: f0ff2447b861 ("selftests/sgx: Add a new kselftest: Unclobbered_vdso_oversubscribed") >> Reported-by: Jarkko Sakkinen <jarkko@kernel.org> >> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> > > The code change is acceptable. Thank you. Reinette
diff --git a/tools/testing/selftests/sgx/main.c b/tools/testing/selftests/sgx/main.c index 7e912db4c6c5..6dead57a3121 100644 --- a/tools/testing/selftests/sgx/main.c +++ b/tools/testing/selftests/sgx/main.c @@ -73,6 +73,18 @@ static bool vdso_get_symtab(void *addr, struct vdso_symtab *symtab) return true; } +static inline void __cpuid(unsigned int *eax, unsigned int *ebx, + unsigned int *ecx, unsigned int *edx) +{ + asm volatile("cpuid" + : "=a" (*eax), + "=b" (*ebx), + "=c" (*ecx), + "=d" (*edx) + : "0" (*eax), "2" (*ecx) + : "memory"); +} + static unsigned long elf_sym_hash(const char *name) { unsigned long h = 0, high;
Commit f0ff2447b861 ("selftests/sgx: Add a new kselftest: Unclobbered_vdso_oversubscribed") depends on __cpuid() without providing the dependency and thus introduces a build error: $ make gcc -Wall -Werror -g -I../../../../tools/include -fPIC -z noexecstack -c main.c -o /path/linux/tools/testing/selftests/sgx/main.o main.c: In function ‘get_total_epc_mem’: main.c:296:3: 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: /path/linux/tools/testing/selftests/sgx/main.o] Error 1 $ Make the kernel's __cpuid() available locally in support of the test's usage. Fixes: f0ff2447b861 ("selftests/sgx: Add a new kselftest: Unclobbered_vdso_oversubscribed") Reported-by: Jarkko Sakkinen <jarkko@kernel.org> Signed-off-by: Reinette Chatre <reinette.chatre@intel.com> --- The commit introducing the issue can be found on the x86/sgx branch of tip.git. tools/testing/selftests/sgx/main.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)