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authorChang S. Bae <chang.seok.bae@intel.com>2025-04-15 19:16:55 -0700
committerIngo Molnar <mingo@kernel.org>2025-04-16 09:44:14 +0200
commitab6f87ddd0c6d3fb114cdf897eb9839cbd429439 (patch)
tree01af3796d1872985ae917a2028ba49615fa2b47d
parent50c5b071e2833d2b61e3774cd792620311df157c (diff)
selftests/x86/apx: Add APX test
The extended general-purpose registers for APX may contain random data, which is currently assumed by the xstate testing framework. This allows the testing of the new userspace feature using the common test code. Invoke the test entry function from apx.c after enumerating the state component and adding it to the support list Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Reviewed-by: Sohil Mehta <sohil.mehta@intel.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Link: https://lore.kernel.org/r/20250416021720.12305-6-chang.seok.bae@intel.com
-rw-r--r--tools/testing/selftests/x86/Makefile3
-rw-r--r--tools/testing/selftests/x86/apx.c10
-rw-r--r--tools/testing/selftests/x86/xstate.c3
-rw-r--r--tools/testing/selftests/x86/xstate.h2
4 files changed, 16 insertions, 2 deletions
diff --git a/tools/testing/selftests/x86/Makefile b/tools/testing/selftests/x86/Makefile
index 28422c32cc8f..f703fcfe9f7c 100644
--- a/tools/testing/selftests/x86/Makefile
+++ b/tools/testing/selftests/x86/Makefile
@@ -19,7 +19,7 @@ TARGETS_C_32BIT_ONLY := entry_from_vm86 test_syscall_vdso unwind_vdso \
test_FCMOV test_FCOMI test_FISTTP \
vdso_restorer
TARGETS_C_64BIT_ONLY := fsgsbase sysret_rip syscall_numbering \
- corrupt_xstate_header amx lam test_shadow_stack avx
+ corrupt_xstate_header amx lam test_shadow_stack avx apx
# Some selftests require 32bit support enabled also on 64bit systems
TARGETS_C_32BIT_NEEDED := ldt_gdt ptrace_syscall
@@ -136,3 +136,4 @@ $(OUTPUT)/nx_stack_64: CFLAGS += -Wl,-z,noexecstack
$(OUTPUT)/avx_64: CFLAGS += -mno-avx -mno-avx512f
$(OUTPUT)/amx_64: EXTRA_FILES += xstate.c
$(OUTPUT)/avx_64: EXTRA_FILES += xstate.c
+$(OUTPUT)/apx_64: EXTRA_FILES += xstate.c
diff --git a/tools/testing/selftests/x86/apx.c b/tools/testing/selftests/x86/apx.c
new file mode 100644
index 000000000000..d9c8d41b8c5a
--- /dev/null
+++ b/tools/testing/selftests/x86/apx.c
@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#define _GNU_SOURCE
+
+#include "xstate.h"
+
+int main(void)
+{
+ test_xstate(XFEATURE_APX);
+}
diff --git a/tools/testing/selftests/x86/xstate.c b/tools/testing/selftests/x86/xstate.c
index 23c1d6c964ea..97fe4bd8bc77 100644
--- a/tools/testing/selftests/x86/xstate.c
+++ b/tools/testing/selftests/x86/xstate.c
@@ -31,7 +31,8 @@
(1 << XFEATURE_OPMASK) | \
(1 << XFEATURE_ZMM_Hi256) | \
(1 << XFEATURE_Hi16_ZMM) | \
- (1 << XFEATURE_XTILEDATA))
+ (1 << XFEATURE_XTILEDATA) | \
+ (1 << XFEATURE_APX))
static inline uint64_t xgetbv(uint32_t index)
{
diff --git a/tools/testing/selftests/x86/xstate.h b/tools/testing/selftests/x86/xstate.h
index 42af36ec852f..e91e3092b5d2 100644
--- a/tools/testing/selftests/x86/xstate.h
+++ b/tools/testing/selftests/x86/xstate.h
@@ -33,6 +33,7 @@ enum xfeature {
XFEATURE_RSRVD_COMP_16,
XFEATURE_XTILECFG,
XFEATURE_XTILEDATA,
+ XFEATURE_APX,
XFEATURE_MAX,
};
@@ -59,6 +60,7 @@ static const char *xfeature_names[] =
"unknown xstate feature",
"AMX Tile config",
"AMX Tile data",
+ "APX registers",
"unknown xstate feature",
};