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

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Message-ID: <CALzav=ekHM8a3yYHHUJNgtYVwLYf1hFhEmrXJjHUXRt=xrSy4A@mail.gmail.com>
Date: Mon, 17 Nov 2025 13:06:47 -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 12:08 PM David Matlack <dmatlack@...gle.com> wrote:
>
> 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)

Correction: I forgot that TEST_PROGS is reserved for test shell
scripts, so this variable needs a different name.

> 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)