mirror of
https://github.com/JakeHillion/drgn.git
synced 2024-12-22 17:23:06 +00:00
405 lines
10 KiB
Python
405 lines
10 KiB
Python
# Copyright (c) Meta Platforms, Inc. and affiliates.
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# SPDX-License-Identifier: LGPL-2.1-or-later
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from collections import OrderedDict
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import inspect
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import os
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from pathlib import Path
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from typing import Dict, Mapping, NamedTuple, Sequence
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from util import NORMALIZED_MACHINE_NAME
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# Kernel versions that we run tests on and therefore support. Keep this in sync
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# with docs/support_matrix.rst.
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SUPPORTED_KERNEL_VERSIONS = (
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"6.5",
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"6.4",
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"6.3",
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"6.2",
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"6.1",
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"6.0",
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"5.19",
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"5.18",
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"5.17",
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"5.16",
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"5.15",
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"5.14",
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"5.13",
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"5.12",
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"5.11",
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"5.10",
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"5.4",
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"4.19",
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"4.14",
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"4.9",
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)
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KERNEL_ORG_COMPILER_VERSION = "12.2.0"
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VMTEST_KERNEL_VERSION = 21
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BASE_KCONFIG = """
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CONFIG_EXPERT=y
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CONFIG_MODULES=y
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CONFIG_MODULE_UNLOAD=y
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CONFIG_CC_OPTIMIZE_FOR_SIZE=y
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# We run the tests in KVM.
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CONFIG_HYPERVISOR_GUEST=y
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CONFIG_KVM_GUEST=y
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CONFIG_PARAVIRT=y
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CONFIG_PARAVIRT_SPINLOCKS=y
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# Minimum requirements for vmtest.
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CONFIG_9P_FS=y
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CONFIG_DEVTMPFS=y
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CONFIG_INET=y
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CONFIG_NET=y
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CONFIG_NETWORK_FILESYSTEMS=y
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CONFIG_NET_9P=y
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CONFIG_NET_9P_VIRTIO=y
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CONFIG_OVERLAY_FS=y
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CONFIG_PCI=y
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CONFIG_PROC_FS=y
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CONFIG_SYSFS=y
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CONFIG_TMPFS=y
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CONFIG_TMPFS_XATTR=y
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CONFIG_VIRTIO_CONSOLE=y
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CONFIG_VIRTIO_PCI=y
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CONFIG_HW_RANDOM=m
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CONFIG_HW_RANDOM_VIRTIO=m
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# Lots of stuff expect Unix sockets.
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CONFIG_UNIX=y
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# drgn needs debug info.
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CONFIG_DEBUG_KERNEL=y
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CONFIG_DEBUG_INFO=y
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CONFIG_DEBUG_INFO_DWARF4=y
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# For testing live kernel debugging with /proc/kcore.
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CONFIG_PROC_KCORE=y
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# drgn needs /proc/kallsyms in some cases. Some test cases also need it.
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CONFIG_KALLSYMS=y
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CONFIG_KALLSYMS_ALL=y
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# For testing kernel core dumps with /proc/vmcore.
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CONFIG_CRASH_DUMP=y
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CONFIG_PROC_VMCORE=y
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CONFIG_KEXEC=y
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CONFIG_KEXEC_FILE=y
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# Needed for CONFIG_KEXEC_FILE.
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CONFIG_CRYPTO=y
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CONFIG_CRYPTO_SHA256=y
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# So that we can trigger a crash with /proc/sysrq-trigger.
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CONFIG_MAGIC_SYSRQ=y
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# For block tests.
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CONFIG_BLK_DEV_LOOP=m
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# For BPF tests.
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CONFIG_BPF_SYSCALL=y
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CONFIG_BPF_JIT=y
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CONFIG_BPF_JIT_ALWAYS_ON=y
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CONFIG_CGROUP_BPF=y
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CONFIG_DEBUG_INFO_BTF=y
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CONFIG_DEBUG_INFO_BTF_MODULES=y
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# For cgroup tests.
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CONFIG_CGROUPS=y
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# To select CONFIG_SOCK_CGROUP_DATA. (CONFIG_CGROUP_BPF also selects
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# CONFIG_SOCK_CGROUP_DATA, but that's only present since Linux kernel commit
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# 3007098494be ("cgroup: add support for eBPF programs") (in v4.10)).
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CONFIG_CGROUP_NET_CLASSID=y
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# For kconfig tests.
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CONFIG_IKCONFIG=m
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CONFIG_IKCONFIG_PROC=y
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# For filesystem tests.
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CONFIG_BTRFS_FS=m
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CONFIG_EXT4_FS=m
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CONFIG_XFS_FS=m
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# For mm tests.
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CONFIG_HUGETLBFS=y
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# For net tests.
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CONFIG_NAMESPACES=y
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# For nodemask tests.
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CONFIG_NUMA=y
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# For slab allocator tests.
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CONFIG_SLAB_FREELIST_HARDENED=y
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# For Traffic Control tests.
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CONFIG_NET_SCHED=y
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CONFIG_NET_SCH_PRIO=m
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CONFIG_NET_SCH_SFQ=m
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CONFIG_NET_SCH_TBF=m
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CONFIG_NET_SCH_INGRESS=m
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CONFIG_NET_CLS_ACT=y
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CONFIG_NETDEVICES=y
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CONFIG_DUMMY=m
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# To enable CONFIG_XARRAY_MULTI for xarray tests.
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CONFIG_TRANSPARENT_HUGEPAGE=y
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CONFIG_READ_ONLY_THP_FOR_FS=y
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"""
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class KernelFlavor(NamedTuple):
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name: str
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description: str
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config: str
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KERNEL_FLAVORS = OrderedDict(
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(flavor.name, flavor)
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for flavor in (
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KernelFlavor(
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name="default",
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description="Default configuration",
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config="""
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CONFIG_SMP=y
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CONFIG_SLUB=y
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# For slab tests.
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CONFIG_SLUB_DEBUG=y
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""",
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),
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KernelFlavor(
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name="alternative",
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description="SLAB allocator",
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config="""
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CONFIG_SMP=y
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CONFIG_SLAB=y
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""",
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),
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KernelFlavor(
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name="tiny",
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description="!SMP, !PREEMPT, and SLOB allocator",
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config="""
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CONFIG_SMP=n
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CONFIG_SLOB=y
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# Linux kernel commit 149b6fa228ed ("mm, slob: rename CONFIG_SLOB to
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# CONFIG_SLOB_DEPRECATED") (in v6.2) renamed the option for SLOB.
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CONFIG_SLOB_DEPRECATED=y
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# CONFIG_PREEMPT_DYNAMIC is not set
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CONFIG_PREEMPT_NONE=y
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# !PREEMPTION && !SMP will also select TINY_RCU.
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""",
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),
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)
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)
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class Architecture(NamedTuple):
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# Architecture name. This matches the names used by
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# util.NORMALIZED_MACHINE_NAME and qemu-system-$arch_name.
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name: str
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# Value of ARCH variable to build the Linux kernel.
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kernel_arch: str
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# Directory under arch/ in the Linux kernel source tree.
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kernel_srcarch: str
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# Linux kernel configuration options.
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kernel_config: str
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# Flavor-specific Linux kernel configuration options.
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kernel_flavor_configs: Mapping[str, str]
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# Name of compiler target on
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# https://mirrors.kernel.org/pub/tools/crosstool/.
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kernel_org_compiler_name: str
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# Options to pass to QEMU.
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qemu_options: Sequence[str]
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# Console device when using QEMU.
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qemu_console: str
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ARCHITECTURES = {
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arch.name: arch
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for arch in (
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Architecture(
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name="aarch64",
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kernel_arch="arm64",
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kernel_srcarch="arm64",
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kernel_config="""
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CONFIG_PCI_HOST_GENERIC=y
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CONFIG_RTC_CLASS=y
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CONFIG_RTC_DRV_PL031=y
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CONFIG_SERIAL_AMBA_PL011=y
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CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
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""",
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kernel_flavor_configs={
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"default": """
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CONFIG_ARM64_4K_PAGES=y
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CONFIG_ARM64_VA_BITS_48=y
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""",
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"alternative": """
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CONFIG_ARM64_64K_PAGES=y
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CONFIG_ARM64_VA_BITS_52=y
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CONFIG_ARM64_PA_BITS_52=y
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""",
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"tiny": """
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CONFIG_ARM64_16K_PAGES=y
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""",
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},
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kernel_org_compiler_name="aarch64-linux",
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qemu_options=("-M", "virt", "-cpu", "cortex-a57"),
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qemu_console="ttyAMA0",
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),
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Architecture(
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name="arm",
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kernel_arch="arm",
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kernel_srcarch="arm",
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kernel_config="""
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CONFIG_NR_CPUS=8
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CONFIG_HIGHMEM=y
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CONFIG_ARM_LPAE=n
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# Debian armhf userspace assumes EABI and VFP.
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CONFIG_AEABI=y
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CONFIG_VFP=y
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CONFIG_ARCH_VIRT=y
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CONFIG_PCI_HOST_GENERIC=y
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CONFIG_RTC_CLASS=y
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CONFIG_RTC_DRV_PL031=y
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CONFIG_SERIAL_AMBA_PL011=y
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CONFIG_SERIAL_AMBA_PL011_CONSOLE=y
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# Before Linux kernel commit f05eb1d24eb5 ("ARM:
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# stackprotector: prefer compiler for TLS based per-task
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# protector") (in v5.18), this enables the
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# arm_ssp_per_task_plugin GCC plugin, which fails to build with
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# the kernel.org cross compiler.
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CONFIG_STACKPROTECTOR_PER_TASK=n
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""",
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kernel_flavor_configs={
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"alternative": """
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CONFIG_ARM_LPAE=y
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""",
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},
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kernel_org_compiler_name="arm-linux-gnueabi",
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qemu_options=("-M", "virt,highmem=off"),
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qemu_console="ttyAMA0",
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),
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Architecture(
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name="ppc64",
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kernel_arch="powerpc",
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kernel_srcarch="powerpc",
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kernel_config="""
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CONFIG_PPC64=y
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CONFIG_CPU_LITTLE_ENDIAN=y
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# Debian ppc64el userspace assumes AltiVec and VSX support.
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CONFIG_ALTIVEC=y
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CONFIG_VSX=y
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CONFIG_RTC_CLASS=y
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CONFIG_RTC_DRV_GENERIC=y
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CONFIG_HVC_CONSOLE=y
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# This has a missing dependency in v6.5-rc1 that causes a build
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# failure, and we don't need it.
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CONFIG_CRYPTO_AES_GCM_P10=n
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""",
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kernel_flavor_configs={},
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kernel_org_compiler_name="powerpc64-linux",
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qemu_options=(),
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qemu_console="hvc0",
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),
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Architecture(
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name="s390x",
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kernel_arch="s390",
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kernel_srcarch="s390",
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kernel_config="""
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# Needed for CONFIG_KEXEC_FILE.
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CONFIG_CRYPTO_SHA256_S390=y
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""",
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kernel_flavor_configs={},
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kernel_org_compiler_name="s390-linux",
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qemu_options=(),
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qemu_console="ttysclp0",
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),
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Architecture(
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name="x86_64",
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kernel_arch="x86_64",
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kernel_srcarch="x86",
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kernel_config="""
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CONFIG_RTC_CLASS=y
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CONFIG_RTC_DRV_CMOS=y
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CONFIG_SERIAL_8250=y
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CONFIG_SERIAL_8250_CONSOLE=y
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""",
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kernel_flavor_configs={},
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kernel_org_compiler_name="x86_64-linux",
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qemu_options=("-nodefaults",),
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qemu_console="ttyS0",
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),
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)
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}
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HOST_ARCHITECTURE = ARCHITECTURES.get(NORMALIZED_MACHINE_NAME)
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class Kernel(NamedTuple):
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arch: Architecture
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release: str
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path: Path
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def local_kernel(arch: Architecture, path: Path) -> Kernel:
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return Kernel(
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arch=arch,
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release=(path / "build/include/config/kernel.release").read_text().strip(),
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path=path,
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)
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class Compiler(NamedTuple):
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target: Architecture
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bin: Path
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prefix: str
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def env(self) -> Dict[str, str]:
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path = str(self.bin.resolve())
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try:
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path += ":" + os.environ["PATH"]
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except KeyError:
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pass
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return {
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"PATH": path,
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"CROSS_COMPILE": self.prefix,
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}
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def kconfig_localversion(flavor: KernelFlavor) -> str:
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localversion = f"-vmtest{VMTEST_KERNEL_VERSION}"
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# The default flavor should be the "latest" version.
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localversion += ".1" if flavor.name == "default" else ".0"
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localversion += flavor.name
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return localversion
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def kconfig(arch: Architecture, flavor: KernelFlavor) -> str:
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return f"""\
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# Minimal Linux kernel configuration for booting into vmtest and running drgn
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# tests ({arch.name} {flavor.name} flavor).
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CONFIG_LOCALVERSION=""
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CONFIG_LOCALVERSION_AUTO=n
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# base options
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{inspect.cleandoc(BASE_KCONFIG)}
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# {flavor.name} flavor options
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{inspect.cleandoc(flavor.config)}
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# {arch.name} options
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{inspect.cleandoc(arch.kernel_config)}
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# {arch.name} {flavor.name} flavor options
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{inspect.cleandoc(arch.kernel_flavor_configs.get(flavor.name, ""))}
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"""
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