mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-23 02:05:57 +01:00
Update GEM5 to master to fix x86 boot via 3feeb994ae613fd6b3734c1a991285b2ecbd1946
See also: http://gem5-users.gem5.narkive.com/CQh9J6fU/fail-to-run-fs-mode-with-linux-kernel-v4-8-13-and-ubuntu-image-16-04-1 Start sketching how to tweak system parameters, number of CPUs works, caches don't.
This commit is contained in:
Ciro Santilli
258
README.adoc
258
README.adoc
@@ -938,7 +938,7 @@ no module object found for ''
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./build -a mips64
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....
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Keep in mind that MIPS has the worst support our architectures due to the smaller community. Patches welcome as usual.
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Keep in mind that MIPS has the worst support compared to our other architectures due to the smaller community. Patches welcome as usual.
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TODOs:
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@@ -1651,6 +1651,54 @@ External open source benchmarks. We will try to create Buildroot packages for th
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* http://parsec.cs.princeton.edu/ Mentioned on docs: http://gem5.org/PARSEC_benchmarks
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* http://www.m5sim.org/Splash_benchmarks
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====== GEM5 change system parameters
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Besides optimizing a program for a given CPU setup, chip developers can also do the inverse, and optimize the chip for a given benchmark!
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* Number of CPUs:
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+
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....
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./run -a arm -c 2 -g
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....
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+
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Check with:
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+
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....
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cat /proc/cpuinfo
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getconf _NPROCESSORS_CONF
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....
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* Cache sizes:
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+
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....
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./run -a arm -c 2 -g -- --caches --l2cache
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....
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+
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Check with:
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+
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....
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getconf -a | grep CACHE
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cat /sys/devices/system/cpu/cpu0/cache/index2/level
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cat /sys/devices/system/cpu/cpu0/cache/index2/size
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....
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+
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Checking `level` is needed, for example `level0` and `level1` represented the same level on Linux 4.15.
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+
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TODO: check not working. `/sys` files don't exist, and `getconf` values empty. Ticket inbound. Related:
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** http://gem5-users.gem5.narkive.com/4xVBlf3c/verify-cache-configuration
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* Memory latency: TODO
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* Disk and network latency: TODO
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* Clock frequency: TODO. Check with:
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....
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m5 resetstats && sleep 10 && m5 dumpstats
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....
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and then:
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....
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grep numCycles m5out/stats.txt
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....
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===== GEM5 kernel command line parameters
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Analogous <<kernel-command-line-parameters,to QEMU>>:
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@@ -1886,219 +1934,11 @@ I have also tried to copy the exact same kernel command line options used by QEM
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==== GEM5 x86
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TODO didn't get it working yet.
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Related threads:
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* https://www.mail-archive.com/gem5-users@gem5.org/msg11384.html
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* https://stackoverflow.com/questions/37906425/booting-gem5-x86-ubuntu-full-system-simulation
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* http://www.lowepower.com/jason/creating-disk-images-for-gem5.html claims to have a working config for x86_64 kernel 4.8.13
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===== GEM5 x86 best attempt
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....
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./configure && ./build -a x86_64 -g
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./run -a x86_64 -g
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....
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telnet:
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....
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i8042: PNP: No PS/2 controller found.
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i8042: Probing ports directly.
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Connection closed by foreign host.
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....
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stdout:
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....
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panic: Data written for unrecognized command 0xd1
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Memory Usage: 1235908 KBytes
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Program aborted at tick 427627410500
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....
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The same failure happens if we use the working QEMU Linux kernel, and / or if we use the kernel 4.8.13 as proposed in lowepower's post..
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If we look a bit into the source, the panic message comes from `i8042.cc`, and on the header we see that the missing command is:
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....
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WriteOutputPort = 0xD1,
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....
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The kernel was compiled with `CONFIG_SERIO_I8042=y`, I didn't dare disable it yet. The Linux kernel driver has no `grep` hits for either of `0xd1` nor `output.?port`, it must be using some random bitmask to build it then.
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This byte is documented at http://wiki.osdev.org/%228042%22_PS/2_Controller, as usual :-)
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There are also a bunch of `i8042` kernel CLI options, I tweaked all of them but nothing.
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===== GDM5 x86 working baseline with magic image
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Working x86 with the pre-built magic image with an ancient 2.6.22.9 kernel starting point:
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....
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sudo mkdir -p /dist/m5/system
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sudo chmod 777 /dist/m5/system
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cd /dist/m5/system
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# Backed up at:
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# https://github.com/cirosantilli/media/releases/tag/gem5
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wget http://www.gem5.org/dist/current/x86/x86-system.tar.bz2
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tar xvf x86-system.tar.bz2
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cd x86-system
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dd if=/dev/zero of=disks/linux-bigswap2.img bs=1024 count=65536
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mkswap disks/linux-bigswap2.img
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cd ..
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git clone https://gem5.googlesource.com/public/gem5
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cd gem5
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git checkout da79d6c6cde0fbe5473ce868c9be4771160a003b
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scons -j$(nproc) build/X86/gem5.opt
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# That old blob has wrong filenames.
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./build/X86/gem5.opt \
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-d /tmp/output \
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--disk-image=/dist/m5/system/disks/linux-x86.img \
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--kernel=/dist/m5/system/binaries/x86_64-vmlinux-2.6.22.9 \
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configs/example/fs.py
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....
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On another shell:
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....
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telnet localhost 3456
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....
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===== GEM5 unmodified Buildroot images 2
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bzImage fails, so we always try with vmlinux obtained from inside build/.
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rootfs.ext2 and vmlinux from 670366caaded57d318b6dbef34e863e3b30f7f29ails as:
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Fails as:
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....
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Global frequency set at 1000000000000 ticks per second
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warn: DRAM device capacity (8192 Mbytes) does not match the address range assigned (512 Mbytes)
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info: kernel located at: /data/git/linux-kernel-module-cheat/buildroot/output.x86_64~/build/linux-custom/vmlinux
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Listening for com_1 connection on port 3456
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0: rtc: Real-time clock set to Sun Jan 1 00:00:00 2012
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0: system.remote_gdb.listener: listening for remote gdb #0 on port 7000
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warn: Reading current count from inactive timer.
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**** REAL SIMULATION ****
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info: Entering event queue @ 0. Starting simulation...
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warn: instruction 'fninit' unimplemented
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warn: Don't know what interrupt to clear for console.
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12516923000: system.pc.com_1.terminal: attach terminal 0
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warn: i8042 "Write output port" command not implemented.
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warn: i8042 "Write keyboard output buffer" command not implemented.
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warn: Write to unknown i8042 (keyboard controller) command port.
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hack: Assuming logical destinations are 1 << id.
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panic: Resetting mouse wrap mode unimplemented.
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Memory Usage: 1003456 KBytes
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Program aborted at tick 632745027500
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--- BEGIN LIBC BACKTRACE ---
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./build/X86/gem5.opt(_Z15print_backtracev+0x15)[0x12b8165]
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./build/X86/gem5.opt(_Z12abortHandleri+0x39)[0x12c32f9]
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/lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fe047a71390]
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/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7fe046601428]
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/lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7fe04660302a]
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./build/X86/gem5.opt(_ZN6X86ISA8PS2Mouse11processDataEh+0xf5)[0x1391095]
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./build/X86/gem5.opt(_ZN6X86ISA5I80425writeEP6Packet+0x51c)[0x13927ec]
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./build/X86/gem5.opt(_ZN7PioPort10recvAtomicEP6Packet+0x66)[0x139f7b6]
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./build/X86/gem5.opt(_ZN15NoncoherentXBar10recvAtomicEP6Packets+0x200)[0x1434af0]
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./build/X86/gem5.opt(_ZN6Bridge15BridgeSlavePort10recvAtomicEP6Packet+0x5d)[0x140ee9d]
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./build/X86/gem5.opt(_ZN12CoherentXBar10recvAtomicEP6Packets+0x3e7)[0x1415b77]
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./build/X86/gem5.opt(_ZN15AtomicSimpleCPU8writeMemEPhjm5FlagsIjEPm+0x327)[0xa790a7]
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./build/X86/gem5.opt(_ZN17SimpleExecContext8writeMemEPhjm5FlagsIjEPm+0x19)[0xa856b9]
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./build/X86/gem5.opt(_ZNK10X86ISAInst2St7executeEP11ExecContextPN5Trace10InstRecordE+0x235)[0xfb9e65]
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./build/X86/gem5.opt(_ZN15AtomicSimpleCPU4tickEv+0x23c)[0xa784fc]
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./build/X86/gem5.opt(_ZN10EventQueue10serviceOneEv+0xc5)[0x12be0d5]
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./build/X86/gem5.opt(_Z9doSimLoopP10EventQueue+0x38)[0x12cd558]
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./build/X86/gem5.opt(_Z8simulatem+0x2eb)[0x12cdbdb]
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./build/X86/gem5.opt(_ZZN8pybind1112cpp_function10initializeIRPFP22GlobalSimLoopExitEventmES3_ImEINS_4nameENS_5scopeENS_7siblingENS_5arg_vEEEEvOT_PFT0_DpT1_EDpRKT2_ENUlRNS_6detail13function_callEE1_4_FUNESO_+0x41)[0x13fca11]
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./build/X86/gem5.opt(_ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_+0x8d8)[0xfc7398]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x7852)[0x7fe047d3b552]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x85c)[0x7fe047e6501c]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x6ffd)[0x7fe047d3acfd]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x7124)[0x7fe047d3ae24]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x7124)[0x7fe047d3ae24]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x85c)[0x7fe047e6501c]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCode+0x19)[0x7fe047d33b89]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x613b)[0x7fe047d39e3b]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x85c)[0x7fe047e6501c]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x6ffd)[0x7fe047d3acfd]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x85c)[0x7fe047e6501c]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCode+0x19)[0x7fe047d33b89]
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--- END LIBC BACKTRACE ---
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Aborted (core dumped)
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....
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Boot goes quite far, on telnet:
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....
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ALSA device list:
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No soundcards found.
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....
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So just looks like we have to disable some Linux configs which GEM5 does not support... so fragile.
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===== GEM5 x86 copy upstream 2.6 configs on 4.9 kernel
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The magic image provides its kernel configurations, so let's try that.
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The configs are present at:
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....
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wget http://www.gem5.org/dist/current/x86/config-x86.tar.bz2
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....
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backed up at: https://github.com/cirosantilli/media/releases/tag/gem5
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Copy `linux-2.6.22.9` into the kernel tree as `.config`, `git checkout v4.9.6`, `make olddefconfig`, `make`, then use the Buildroot filesystem as above, failure:
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....
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panic: Invalid IDE control register offset: 0
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Memory Usage: 931272 KBytes
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Program aborted at tick 382834812000
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--- BEGIN LIBC BACKTRACE ---
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./build/X86/gem5.opt(_Z15print_backtracev+0x15)[0x12b8165]
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./build/X86/gem5.opt(_Z12abortHandleri+0x39)[0x12c32f9]
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/lib/x86_64-linux-gnu/libpthread.so.0(+0x11390)[0x7fc2081c6390]
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/lib/x86_64-linux-gnu/libc.so.6(gsignal+0x38)[0x7fc206d56428]
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/lib/x86_64-linux-gnu/libc.so.6(abort+0x16a)[0x7fc206d5802a]
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./build/X86/gem5.opt(_ZN7IdeDisk11readControlEmiPh+0xd9)[0xa96989]
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./build/X86/gem5.opt(_ZN13IdeController14dispatchAccessEP6Packetb+0x53e)[0xa947ae]
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./build/X86/gem5.opt(_ZN13IdeController4readEP6Packet+0xe)[0xa94a5e]
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./build/X86/gem5.opt(_ZN7PioPort10recvAtomicEP6Packet+0x3f)[0x139f78f]
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./build/X86/gem5.opt(_ZN15NoncoherentXBar10recvAtomicEP6Packets+0x200)[0x1434af0]
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./build/X86/gem5.opt(_ZN6Bridge15BridgeSlavePort10recvAtomicEP6Packet+0x5d)[0x140ee9d]
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./build/X86/gem5.opt(_ZN12CoherentXBar10recvAtomicEP6Packets+0x3e7)[0x1415b77]
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./build/X86/gem5.opt(_ZN15AtomicSimpleCPU7readMemEmPhj5FlagsIjE+0x3ef)[0xa780ef]
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./build/X86/gem5.opt(_ZN17SimpleExecContext7readMemEmPhj5FlagsIjE+0x11)[0xa85671]
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./build/X86/gem5.opt(_ZNK10X86ISAInst2Ld7executeEP11ExecContextPN5Trace10InstRecordE+0x130)[0xfb6c00]
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./build/X86/gem5.opt(_ZN15AtomicSimpleCPU4tickEv+0x23c)[0xa784fc]
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./build/X86/gem5.opt(_ZN10EventQueue10serviceOneEv+0xc5)[0x12be0d5]
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./build/X86/gem5.opt(_Z9doSimLoopP10EventQueue+0x38)[0x12cd558]
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./build/X86/gem5.opt(_Z8simulatem+0x2eb)[0x12cdbdb]
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./build/X86/gem5.opt(_ZZN8pybind1112cpp_function10initializeIRPFP22GlobalSimLoopExitEventmES3_ImEINS_4nameENS_5scopeENS_7siblingENS_5arg_vEEEEvOT_PFT0_DpT1_EDpRKT2_ENUlRNS_6detail13function_callEE1_4_FUNESO_+0x41)[0x13fca11]
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./build/X86/gem5.opt(_ZN8pybind1112cpp_function10dispatcherEP7_objectS2_S2_+0x8d8)[0xfc7398]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x7852)[0x7fc208490552]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x85c)[0x7fc2085ba01c]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x6ffd)[0x7fc20848fcfd]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x7124)[0x7fc20848fe24]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x7124)[0x7fc20848fe24]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x85c)[0x7fc2085ba01c]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCode+0x19)[0x7fc208488b89]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x613b)[0x7fc20848ee3b]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x85c)[0x7fc2085ba01c]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalFrameEx+0x6ffd)[0x7fc20848fcfd]
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/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyEval_EvalCodeEx+0x85c)[0x7fc2085ba01c]
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--- END LIBC BACKTRACE ---
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Aborted (core dumped)
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....
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===== GEM5 x86 use upstream 2.6 configs and 2.6 kernel
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If we checkout to the ancient kernel `v2.6.22.9`, it fails to compile with modern GNU make 4.1: https://stackoverflow.com/questions/35002691/makefile-make-clean-why-getting-mixed-implicit-and-normal-rules-deprecated-s lol
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== Failed action
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=== Record and replay
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Reference in New Issue
Block a user