From: Willy Tarreau <w@1wt.eu>
To: "Paul E . McKenney" <paulmck@kernel.org>
Cc: Pranith Kumar <bobby.prani@gmail.com>,
Alviro Iskandar Setiawan <alviro.iskandar@gnuweeb.org>,
Ammar Faizi <ammarfaizi2@gnuweeb.org>,
David Laight <David.Laight@ACULAB.COM>,
Mark Brown <broonie@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Shuah Khan <shuah@kernel.org>,
linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org,
Willy Tarreau <w@1wt.eu>
Subject: [PATCH 09/17] selftests/nolibc: on x86, support exiting with isa-debug-exit
Date: Tue, 19 Jul 2022 23:44:41 +0200 [thread overview]
Message-ID: <20220719214449.2520-11-w@1wt.eu> (raw)
In-Reply-To: <20220719214449.2520-1-w@1wt.eu>
QEMU, when started with "-device isa-debug-exit -no-reboot" will exit
with status code 2N+1 when N is written to 0x501. This is particularly
convenient for automated tests but this is not portable. As such we
only enable this on x86_64 when pid==1. In addition, this requires an
ioperm() call but in order not to have to define arch-specific syscalls
we just perform the syscall by hand there.
Signed-off-by: Willy Tarreau <w@1wt.eu>
---
tools/testing/selftests/nolibc/nolibc-test.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c
index 5f2173610d03..45793b6f2244 100644
--- a/tools/testing/selftests/nolibc/nolibc-test.c
+++ b/tools/testing/selftests/nolibc/nolibc-test.c
@@ -638,6 +638,15 @@ int main(int argc, char **argv, char **envp)
printf("Leaving init with final status: %d\n", !!ret);
if (ret == 0)
reboot(LINUX_REBOOT_CMD_POWER_OFF);
+#if defined(__x86_64__)
+ /* QEMU started with "-device isa-debug-exit -no-reboot" will
+ * exit with status code 2N+1 when N is written to 0x501. We
+ * hard-code the syscall here as it's arch-dependent.
+ */
+ else if (my_syscall3(__NR_ioperm, 0x501, 1, 1) == 0)
+ asm volatile ("outb %%al, %%dx" :: "d"(0x501), "a"(0));
+ /* if it does nothing, fall back to the regular panic */
+#endif
}
printf("Exiting with status %d\n", !!ret);
--
2.17.5
next prev parent reply other threads:[~2022-07-19 21:47 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-19 21:44 [PATCH 00/17] nolibc: add preliminary self tests Willy Tarreau
2022-07-19 21:44 ` [PATCH 01/17] tools/nolibc: make argc 32-bit in riscv startup code Willy Tarreau
2022-07-19 21:44 ` [PATCH 02/17] tools/nolibc: fix build warning in sys_mmap() when my_syscall6 is not defined Willy Tarreau
2022-07-19 21:44 ` [PATCH 03/17] tools/nolibc: make sys_mmap() automatically use the right __NR_mmap definition Willy Tarreau
2022-07-19 21:44 ` [PATCH 04/17] selftests/nolibc: add basic infrastructure to ease creation of nolibc tests Willy Tarreau
2022-07-19 21:44 ` [PATCH 05/17] selftests/nolibc: support a test definition format Willy Tarreau
2022-07-19 21:44 ` [PATCH 06/17] selftests/nolibc: implement a few tests for various syscalls Willy Tarreau
2022-07-19 21:44 ` [PATCH 07/17] selftests/nolibc: add a few tests for some libc functions Willy Tarreau
2022-07-19 21:44 ` [PATCH 07/17] selftests/nolibc: add a few tests for some stdlib functions Willy Tarreau
2022-07-19 21:44 ` [PATCH 08/17] selftests/nolibc: exit with poweroff on success when getpid() == 1 Willy Tarreau
2022-07-19 21:44 ` Willy Tarreau [this message]
2022-07-19 21:44 ` [PATCH 10/17] selftests/nolibc: recreate and populate /dev and /proc if missing Willy Tarreau
2022-07-19 21:44 ` [PATCH 11/17] selftests/nolibc: condition some tests on /proc existence Willy Tarreau
2022-07-19 21:44 ` [PATCH 12/17] selftests/nolibc: support glibc as well Willy Tarreau
2022-07-19 21:44 ` [PATCH 13/17] selftests/nolibc: add a "kernel" target to build the kernel with the initramfs Willy Tarreau
2022-07-19 21:44 ` [PATCH 14/17] selftests/nolibc: add a "defconfig" target Willy Tarreau
2022-07-19 21:44 ` [PATCH 15/17] selftests/nolibc: add a "run" target to start the kernel in QEMU Willy Tarreau
2022-07-19 21:44 ` [PATCH 16/17] selftests/nolibc: "sysroot" target installs a local copy of the sysroot Willy Tarreau
2022-07-19 21:44 ` [PATCH 17/17] selftests/nolibc: add a "help" target Willy Tarreau
2022-07-19 22:49 ` [PATCH 00/17] nolibc: add preliminary self tests Paul E. McKenney
2022-07-20 3:26 ` Willy Tarreau
2022-07-20 16:03 ` Ammar Faizi
2022-07-20 16:20 ` Willy Tarreau
2022-07-20 17:05 ` Ammar Faizi
2022-07-20 17:14 ` Willy Tarreau
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220719214449.2520-11-w@1wt.eu \
--to=w@1wt.eu \
--cc=David.Laight@ACULAB.COM \
--cc=alviro.iskandar@gnuweeb.org \
--cc=ammarfaizi2@gnuweeb.org \
--cc=bobby.prani@gmail.com \
--cc=broonie@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-kselftest@vger.kernel.org \
--cc=paulmck@kernel.org \
--cc=shuah@kernel.org \
--cc=torvalds@linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).