linux-kernel - Re: [PATCH v6 18/20] selftests/liveupdate: Add kexec-based selftest for session lifecycle

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Message-ID: <CALzav=f+6hQ-UYBpwmAyKHPmtvEq-Q=mOL20_rZmAcTyd87+Vg@mail.gmail.com>
Date: Mon, 17 Nov 2025 12:08:14 -0800
From: David Matlack <dmatlack@...gle.com>
To: Pasha Tatashin <pasha.tatashin@...een.com>
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Subject: Re: [PATCH v6 18/20] selftests/liveupdate: Add kexec-based selftest
 for session lifecycle

On Mon, Nov 17, 2025 at 11:27 AM David Matlack <dmatlack@...gle.com> wrote:

> Putting it all together, here is what I'd recommend for this Makefile
> (drop-in replacement for the current Makefile). This will also make it
> easier for me to share the library code with VFIO selftests, which
> I'll need to do in the VFIO series.
>
> (Sorry in advance for the line wrap. I had to send this through gmail.)

Oops I dropped the build rule for liveupdate.c. Here it is with that included:

# SPDX-License-Identifier: GPL-2.0-only

LIBLIVEUPDATE_C += luo_test_utils.c

TEST_GEN_PROGS += liveupdate
TEST_GEN_PROGS_EXTENDED += luo_kexec_simple
TEST_GEN_PROGS_EXTENDED += luo_multi_session

TEST_FILES += do_kexec.sh

include ../lib.mk

CFLAGS += $(KHDR_INCLUDES)
CFLAGS += -Wall -O2 -Wno-unused-function
CFLAGS += -MD
CFLAGS += $(EXTRA_CFLAGS)

LIBLIVEUPDATE_O := $(patsubst %.c, $(OUTPUT)/%.o, $(LIBLIVEUPDATE_C))
TEST_PROGS := $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED)
TEST_PROGS_O := $(patsubst %, %.o, $(TEST_PROGS))

TEST_DEP_FILES += $(patsubst %.o, %.d, $(LIBLIVEUPDATE_O))
TEST_DEP_FILES += $(patsubst %.o, %.d, $(TEST_PROGS_O))
-include $(TEST_DEP_FILES)

$(LIBLIVEUPDATE_O): $(OUTPUT)/%.o: %.c
        $(CC) $(CFLAGS) $(CPPFLAGS) $(TARGET_ARCH) -c $< -o $@

$(TEST_PROGS): %: %.o $(LIBLIVEUPDATE_O)
        $(CC) $(CFLAGS) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH) $<
$(LIBLIVEUPDATE_O) $(LDLIBS) -o $@

EXTRA_CLEAN += $(LIBLIVEUPDATE_O)
EXTRA_CLEAN += $(TEST_PROGS_O)
EXTRA_CLEAN += $(TEST_DEP_FILES)