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From 6e304517801fdfb58df582e37cd4df04b5adc1b6 Mon Sep 17 00:00:00 2001
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From: Frantisek Sumsal <frantisek@sumsal.cz>
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Date: Fri, 12 Nov 2021 21:43:12 +0100
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Subject: [PATCH] test: don't use `-cpu max` in GH Actions
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There appears to be an issue with newer QEMU versions (spotted with Arch
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Linux and C9S containers) which causes the respective GH Action to hang
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when booting a QEMU VM in combination with the `-cpu max` parameter.
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During (a particularly painful) debugging session I once managed to get
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some output from such "frozen" machine (using `earlycon` and
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`earlyprintk` kernel cmdline options), and in that particular case the
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VM died with a trap caused by an invalid opcode.
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I couldn't reproduce this locally, only in GH Actions environment with
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Arch Linux and C9S containers. Also, so far I haven't found out which
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specific CPUID flag causes this, but using the `IvyBridge-v2` feature
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set seems to mitigate the issue.
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(cherry picked from commit 3f56d481e8a3c67c2e795686e6ec3bfc4ea08e1d)
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---
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test/run-qemu | 5 +++--
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tools/test-github.sh | 1 +
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2 files changed, 4 insertions(+), 2 deletions(-)
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diff --git a/test/run-qemu b/test/run-qemu
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index 3c521a14..5dc61037 100755
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--- a/test/run-qemu
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+++ b/test/run-qemu
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@@ -3,13 +3,14 @@
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# We prefer kvm, kqemu, userspace in that order.
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export PATH=/usr/sbin:/usr/bin:/sbin:/bin
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+QEMU_CPU="${QEMU_CPU:-max}"
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-[[ -x /usr/bin/qemu ]] && BIN=/usr/bin/qemu && ARGS=(-cpu max)
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+[[ -x /usr/bin/qemu ]] && BIN=/usr/bin/qemu && ARGS=(-cpu "$QEMU_CPU")
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(lsmod | grep -q '^kqemu ') && BIN=/usr/bin/qemu && ARGS=(-kernel-kqemu -cpu host)
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[[ -c /dev/kvm && -x /usr/bin/kvm ]] && BIN=/usr/bin/kvm && ARGS=(-cpu host)
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[[ -c /dev/kvm && -x /usr/bin/qemu-kvm ]] && BIN=/usr/bin/qemu-kvm && ARGS=(-cpu host)
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[[ -c /dev/kvm && -x /usr/libexec/qemu-kvm ]] && BIN=/usr/libexec/qemu-kvm && ARGS=(-cpu host)
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-[[ -x /usr/bin/qemu-system-$(uname -m) ]] && BIN=/usr/bin/qemu-system-$(uname -m) && ARGS=(-cpu max)
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+[[ -x /usr/bin/qemu-system-$(uname -m) ]] && BIN=/usr/bin/qemu-system-$(uname -m) && ARGS=(-cpu "$QEMU_CPU")
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[[ -c /dev/kvm && -x /usr/bin/qemu-system-$(uname -m) ]] && BIN=/usr/bin/qemu-system-$(uname -m) && ARGS=(-enable-kvm -cpu host)
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[[ $BIN ]] || {
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diff --git a/tools/test-github.sh b/tools/test-github.sh
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index eab59dcc..1d61b8e3 100755
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--- a/tools/test-github.sh
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+++ b/tools/test-github.sh
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@@ -41,6 +41,7 @@ else
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cd /lib/modules
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ls -1 | tail -1
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)" \
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+ QEMU_CPU="IvyBridge-v2" \
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DRACUT_NO_XATTR=1 \
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TEST_RUN_ID="$RUN_ID" \
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${TESTS:+TESTS="$TESTS"} \
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