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# Copyright 2020 syzkaller project authors. All rights reserved.
# Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
shell:
- make x86_64_defconfig: [-nodefconfig]
- make kvm_guest.config
config:
# root=/dev/sda is not necessary correct, but it's a common setting and user arguments are appended
# to the builtin command line, so user can always override this.
# vsyscall=native required to run x86_64 executables on android kernels (it disables VDSO by default).
- CMDLINE: [append, "root=/dev/sda console=ttyS0 vsyscall=native numa=fake=2 kvm-intel.nested=1 spec_store_bypass_disable=prctl nopcid vivid.n_devs=16 vivid.multiplanar=1,2,1,2,1,2,1,2,1,2,1,2,1,2,1,2 netrom.nr_ndevs=16 rose.rose_ndevs=16 dummy_hcd.num=8 watchdog_thresh=55 workqueue.watchdog_thresh=140 sysctl.net.core.netdev_unregister_timeout_secs=140"]
- CMDLINE_BOOL
# Deterministic hang/stall detection.
# Without careful tuning the same hang/stall can be detected in multiple, radically-different ways.
# For example, an infinite loop can be detected as CPU stall, RCU stall, hung task or workqueue stall.
# This may lead to lots of duplicate bugs. In order to prevent this we strictly order hang/stall detection
# timeouts based on their causality (CPU stall can cause hung task, but not vise versa). See #516 for details.
#
# 1. RCU stalls has the highest priority.
# RCU_CPU_STALL_TIMEOUT=100 results in stalls detected after 100-101 secs.
#
# 2. Then softlockup detector.
# kernel.watchdog_thresh = 55 detects stalls after 110-132 secs.
#
# 3. Then hung tasks, workqueue stalls and netdev unregister hangs.
# Unfortunately we can't separate them because that would require setting "no output" timeout to 10+ minutes.
# watchdog_thresh=140 and DEFAULT_HUNG_TASK_TIMEOUT=140 both result in detection after 140-280 secs.
#
# 4. Finally, "no output" crashes.
# sys/targets.Timeouts.NoOutput is set to 300 secs.
#
# Don't change these values without considering all other values as well.
# Note: executor also sets hung_task_check_interval_secs=20 sysctl.
# Note: gVisor watchdog timeout is 3 mins + 1/4 of that for checking period = 3m45s.
# Note: other arches that use qemu emulation scale all these timeouts by 3 (sys/targets.Timeouts.Scale).
- RCU_CPU_STALL_TIMEOUT: 100
# The constraints repeat constraints on inclusion of debug.yml which enables hung task detection.
- DEFAULT_HUNG_TASK_TIMEOUT: [140, -nonoise, -kmsan, -kcsan, -kmemleak]
# Should be faster this way.
- MCORE2
- BASE_FULL
# 32-on-64 support (compat).
- IA32_EMULATION
# X86_X32 renamed to X86_X32_ABI in v5.18
- X86_X32: [-baseline, -v5.18]
- X86_X32_ABI: [-baseline, v5.18]
# Moved from legacy config, reason for enabling is unknown.
- KALLSYMS_ABSOLUTE_PERCPU
- X86_MSR
- X86_CPUID
- X86_5LEVEL: n
# Should be faster this way.
- PARAVIRT_SPINLOCKS
- PARAVIRT_DEBUG
- PROCESSOR_SELECT
- CPU_SUP_HYGON: n
- CPU_SUP_CENTAUR: n
- CPU_SUP_ZHAOXIN: n
# Required to boot Debian Wheezy.
- X86_VSYSCALL_EMULATION
# Intel network support.
# TODO: should we switch to virtio instead?
- ETHERNET
- NET_VENDOR_INTEL
- E1000
- X86_ACPI_CPUFREQ
- CPU_IDLE_GOV_HALTPOLL: [v4.16]
- X86_INTEL_TSX_MODE_ON: [v4.16]
- INTEL_IDLE
- LEGACY_VSYSCALL_EMULATE
- EFI: n
- TRACE_EVENT_INJECT: [v5.5]
- PM_TRACE_RTC: [optional]
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