[PATCH v6 1/4] x86/tests: Add tests for AMD SEV-ES #VC handling Add Kconfig options for testing AMD SEV related features.

Vasant Karasulli
2022-03-18T09:45:49Z

Signed-off-by: Vasant Karasulli <vkarasulli@suse.de>
---
arch/x86/Kbuild | 2 ++
arch/x86/Kconfig.debug | 16 ++++++++++++++++
arch/x86/kernel/Makefile | 7 +++++++
arch/x86/tests/Makefile | 1 +
4 files changed, 26 insertions(+)
create mode 100644 arch/x86/tests/Makefile

diff --git a/arch/x86/Kbuild b/arch/x86/Kbuild
index f384cb1a4f7a..90470c76866a 100644
--- a/arch/x86/Kbuild
+++ b/arch/x86/Kbuild
@@ -26,5 +26,7 @@ obj-y += net/

obj-$(CONFIG_KEXEC_FILE) += purgatory/

+obj-y += tests/
+
# for cleaning
subdir- += boot tools
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index d3a6f74a94bd..e4f61af66816 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -279,3 +279,19 @@ endchoice
config FRAME_POINTER
depends on !UNWINDER_ORC && !UNWINDER_GUESS
bool
+
+config X86_TESTS
+ bool "Tests for x86"
+ help
+ This enables building the tests under arch/x86/tests.
+
+if X86_TESTS
+config AMD_SEV_TEST_VC
+ bool "Test for AMD SEV VC exception handling"
+ depends on AMD_MEM_ENCRYPT
+ select FUNCTION_TRACER
+ select KPROBES
+ select KUNIT
+ help
+ Enable KUnit-based testing for AMD SEV #VC exception handling.
+endif # X86_TESTS
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 6aef9ee28a39..69472a576909 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -24,6 +24,13 @@ CFLAGS_REMOVE_sev.o = -pg
CFLAGS_REMOVE_cc_platform.o = -pg
endif

+# AMD_SEV_TEST_VC registers a kprobe by function name. IPA-SRA creates
+# function copies and renames them to have an .isra suffix, which breaks kprobes'
+# lookup. Build with -fno-ipa-sra for the test.
+ifdef CONFIG_AMD_SEV_TEST_VC
+CFLAGS_sev.o += -fno-ipa-sra
+endif
+
KASAN_SANITIZE_head$(BITS).o := n
KASAN_SANITIZE_dumpstack.o := n
KASAN_SANITIZE_dumpstack_$(BITS).o := n
diff --git a/arch/x86/tests/Makefile b/arch/x86/tests/Makefile
new file mode 100644
index 000000000000..f66554cd5c45
--- /dev/null
+++ b/arch/x86/tests/Makefile
@@ -0,0 +1 @@
+# SPDX-License-Identifier: GPL-2.0
--
2.32.0