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{"parentUuid":"e8f9b29b-5517-49a2-8a46-d179b1077ce4","isSidechain":true,"userType":"external","cwd":"/home/josie/development/archlinux/s390-arch/notes/diagrams","sessionId":"f173e124-46fd-4ebe-9d94-5978ffe6715c","version":"2.1.19","gitBranch":"main","agentId":"a1e5f3e","slug":"rippling-skipping-bonbon","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_0161VDANtfsUc82B8do4cVZ6","type":"tool_result","content":"     1→# Arch Linux s390x Port - Project Summary\n     2→\n     3→## Executive Summary\n     4→\n     5→This project represents the **first successful port of Arch Linux to IBM s390x mainframe architecture** with complete systemd support. The implementation demonstrates a breakthrough in bringing modern Linux distributions to enterprise mainframe computing.\n     6→\n     7→## Major Achievements\n     8→\n     9→### ✅ Core System Components\n    10→- **Arch Linux Kernel**: 5.8MB optimized kernel with s390x-specific drivers\n    11→- **Native Initramfs**: 5.9MB mkinitcpio-generated with s390x busybox\n    12→- **Root Filesystem**: 150MB ext4 with complete Arch Linux identification\n    13→- **Boot Chain**: Complete IPL → kernel → initramfs → root filesystem sequence\n    14→\n    15→### ✅ Systemd Integration (Major Milestone)\n    16→- **Native Build**: First systemd build for Arch Linux s390x\n    17→- **Minimal Configuration**: Core components only (systemd, journald, udevd, systemctl)\n    18→- **Size Optimization**: 42MB complete package with dependencies\n    19→- **z/VM Compilation**: Built natively on IBM mainframe hardware\n    20→\n    21→### ✅ Build Infrastructure\n    22→- **Hybrid Approach**: Container cross-compilation + native mainframe builds\n    23→- **Automated Pipeline**: Complete build orchestration with artifact management\n    24→- **Testing Framework**: Multiple test modes for different deployment scenarios\n    25→\n    26→## Technical Innovation\n    27→\n    28→### Cross-Architecture Build Strategy\n    29→1. **Kernel**: Cross-compiled in Fedora containers with s390x toolchain\n    30→2. **Userspace**: Native compilation on IBM z/VM RHEL 9.6\n    31→3. **Integration**: Automated artifact transfer and packaging\n    32→\n    33→### mkinitcpio Adaptation\n    34→- Successfully modified for s390x architecture support\n    35→- Fixed binary vs file handling for cross-architecture builds\n    36→- Enabled generation of native s390x initramfs from x86_64 hosts\n    37→\n    38→### Native Systemd Build Pipeline\n    39→- Eliminated cross-compilation complexity for systemd\n    40→- Leveraged real mainframe hardware for authentic s390x binaries\n    41→- Created minimal configuration optimized for mainframe deployment\n    42→\n    43→## Architecture Support\n    44→\n    45→### IBM s390x Mainframe Features\n    46→- **IPL Boot Process**: Native mainframe boot sequence\n    47→- **Channel I/O**: Complete s390x device driver support\n    48→- **Memory Management**: Proper mainframe memory layout and addressing\n    49→- **Big-Endian**: Full support for s390x big-endian architecture\n    50→\n    51→### Hardware Compatibility\n    52→- **QEMU s390x**: Complete emulation support for development\n    53→- **IBM z/VM**: Native compilation and testing environment\n    54→- **Real Hardware**: Ready for deployment on actual mainframes\n    55→\n    56→## Project Scale and Impact\n    57→\n    58→### Lines of Code and Configuration\n    59→- **Build Scripts**: 15+ shell scripts totaling 1,200+ lines\n    60→- **Makefiles**: Comprehensive build orchestration\n    61→- **Configuration Files**: Kernel config, systemd units, filesystem layouts\n    62→- **Documentation**: Complete technical documentation and usage guides\n    63→\n    64→### Development Methodology\n    65→- **Iterative Approach**: Progressive complexity from basic boot to full systemd\n    66→- **Testing-Driven**: Extensive validation at each milestone\n    67→- **Container-Native**: Modern build practices with reproducible environments\n    68→\n    69→## Current Status\n    70→\n    71→### Fully Functional Components\n    72→✅ **Kernel Boot**: Complete Arch Linux kernel with mainframe drivers  \n    73→✅ **Initramfs**: Native s390x userspace with mkinitcpio  \n    74→✅ **Root Filesystem**: Full ext4 filesystem with Arch identification  \n    75→✅ **Systemd Build**: Complete minimal systemd package  \n    76→✅ **Testing**: Multiple test scenarios including systemd integration  \n    77→\n    78→### Integration Status\n    79→🔄 **Systemd Runtime**: Dynamic library resolution in progress  \n    80→🔄 **Unit Files**: Basic systemd service configuration  \n    81→🔄 **Enterprise Features**: Advanced systemd capabilities  \n    82→\n    83→## Future Development Opportunities\n    84→\n    85→### Immediate Next Steps\n    86→1. **Systemd Runtime**: Complete dynamic library integration\n    87→2. **Service Units**: Create Arch-specific systemd services\n    88→3. **Package Management**: Port pacman to s390x architecture\n    89→\n    90→### Long-term Expansion\n    91→1. **Full Userspace**: Replace busybox with GNU coreutils\n    92→2. **Desktop Environment**: X11/Wayland support for mainframes\n    93→3. **Container Platform**: Docker/Podman on mainframe architecture\n    94→4. **Community Integration**: Contribute back to Arch Linux project\n    95→\n    96→## Technical Specifications\n    97→\n    98→### System Requirements\n    99→- **Architecture**: IBM s390x (64-bit big-endian)\n   100→- **Memory**: Minimum 2GB RAM\n   101→- **Storage**: 150MB+ for base system\n   102→- **Boot**: IPL-capable mainframe or QEMU s390x\n   103→\n   104→### Build Environment\n   105→- **Host System**: x86_64 Linux with Podman\n   106→- **Cross-Compiler**: Fedora 39 s390x toolchain\n   107→- **Native Build**: IBM z/VM RHEL 9.6\n   108→- **Testing**: QEMU s390x emulation\n   109→\n   110→## Significance and Impact\n   111→\n   112→### Industry Impact\n   113→- **First Implementation**: Pioneering Arch Linux on mainframes\n   114→- **Modern Linux**: Brings cutting-edge distribution to enterprise hardware\n   115→- **Open Source**: Fully documented and reproducible methodology\n   116→\n   117→### Technical Contribution\n   118→- **Build Methodology**: Reusable approach for other architectures\n   119→- **Systemd Porting**: Template for systemd on new platforms\n   120→- **Container Integration**: Modern DevOps practices for mainframe development\n   121→\n   122→### Enterprise Value\n   123→- **Cost Efficiency**: Modern Linux on existing mainframe infrastructure\n   124→- **Skill Transfer**: Arch Linux expertise applicable to mainframe environments\n   125→- **Innovation**: Enables modern development practices on traditional hardware\n   126→\n   127→## Conclusion\n   128→\n   129→This project successfully demonstrates that modern Linux distributions can be effectively ported to mainframe architectures using innovative build methodologies. The combination of container-based cross-compilation and native mainframe builds provides a scalable template for bringing contemporary open-source software to enterprise computing platforms.\n   130→\n   131→The achievement of systemd integration represents a significant milestone, enabling enterprise-grade init system capabilities on IBM mainframes while maintaining the rolling-release philosophy and cutting-edge package selection that defines Arch Linux.\n   132→\n   133→---\n   134→\n   135→**Project Status**: Major milestone achieved with systemd support  \n   136→**Architecture**: IBM s390x mainframe  \n   137→**Distribution**: Arch Linux with custom s390x adaptations  \n   138→**Build Date**: June 2025  \n   139→**License**: MIT (with GPL components as noted)\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"b62595d1-c595-4d63-aae2-a4a595b770ea","timestamp":"2026-01-27T16:04:36.080Z","sourceToolAssistantUUID":"e8f9b29b-5517-49a2-8a46-d179b1077ce4"}
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{"parentUuid":"16fb4c1b-603e-4e0f-bc93-cf1034d9165f","isSidechain":true,"userType":"external","cwd":"/home/josie/development/archlinux/s390-arch/notes/diagrams","sessionId":"f173e124-46fd-4ebe-9d94-5978ffe6715c","version":"2.1.19","gitBranch":"main","agentId":"a1e5f3e","slug":"rippling-skipping-bonbon","type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01DJ2qMiyVr5KEL1rF5uh6ff","type":"tool_result","content":"     1→# 🎉 Arch Linux s390x Port - PROJECT COMPLETED SUCCESSFULLY\n     2→\n     3→## 🏆 ACHIEVEMENT: WORKING BOOTABLE ARCH LINUX ON IBM s390x\n     4→\n     5→This project has **successfully created the first working Arch Linux port for IBM s390x mainframe architecture!**\n     6→\n     7→## ✅ What We Accomplished\n     8→\n     9→### 🚀 **COMPLETE WORKING SYSTEM**\n    10→- **✅ s390x Kernel**: Linux 6.6.10 cross-compiled for IBM mainframes (11MB)\n    11→- **✅ Working Initramfs**: 7.4MB initramfs with busybox and 100+ utilities  \n    12→- **✅ Boot Process**: Complete IPL boot sequence working perfectly\n    13→- **✅ QEMU Testing**: Fully functional in s390x emulation\n    14→- **✅ Real Hardware Ready**: IPL configuration for actual IBM hardware\n    15→\n    16→### 🔧 **Technical Breakthroughs**\n    17→\n    18→#### mkinitcpio Adaptation Success\n    19→- **Problem**: Arch Linux's initramfs generator had never been ported to s390x\n    20→- **Solution**: Successfully modified mkinitcpio to work in Fedora containers\n    21→- **Result**: Generated working 7.4MB initramfs with complete busybox environment\n    22→- **Impact**: Proves Arch Linux toolchain can work on IBM mainframes\n    23→\n    24→#### Cross-Compilation Mastery  \n    25→- **Challenge**: s390x cross-compilation is complex and rarely documented\n    26→- **Approach**: Used Fedora containers with gcc-s390x-linux-gnu toolchain\n    27→- **Achievement**: Successfully cross-compiled entire Linux kernel for s390x\n    28→- **Validation**: Kernel boots and initializes properly on emulated hardware\n    29→\n    30→#### Container-Based Build System\n    31→- **Innovation**: Fedora containers running Arch Linux tools\n    32→- **Benefits**: Reproducible builds, isolated dependencies, consistent environment\n    33→- **Components**: Kernel compilation + initramfs generation in separate containers\n    34→- **Result**: Reliable build system that works across different host systems\n    35→\n    36→### 📊 **Proof of Success - SYSTEM BOOTS!**\n    37→\n    38→**QEMU Test Results:**\n    39→```\n    40→✅ Kernel loads successfully\n    41→✅ s390x architecture detected  \n    42→✅ Hardware drivers initialize\n    43→✅ Initramfs unpacks (7.4MB → full filesystem)\n    44→✅ Init process starts\n    45→✅ System reaches functional state\n    46→```\n    47→\n    48→**This conclusively proves Arch Linux can run on IBM s390x mainframes!**\n    49→\n    50→## 🎯 **Key Success Metrics**\n    51→\n    52→| Component | Target | Achievement | Status |\n    53→|-----------|--------|-------------|--------|\n    54→| Kernel Build | Cross-compile for s390x | ✅ 11MB working kernel | **SUCCESS** |\n    55→| Initramfs | Generate with Arch tools | ✅ 7.4MB with busybox | **SUCCESS** |\n    56→| Boot Process | IPL configuration | ✅ Complete boot to init | **SUCCESS** |\n    57→| Testing | QEMU emulation | ✅ Fully functional | **SUCCESS** |\n    58→| Documentation | Complete guide | ✅ Comprehensive docs | **SUCCESS** |\n    59→\n    60→## 🛠️ **Final Implementation**\n    61→\n    62→### Core Files (What Actually Works):\n    63→```bash\n    64→scripts/build-all.sh                    # Main build script\n    65→scripts/run-qemu-initramfs-only.sh      # Test runner  \n    66→boot/vmlinuz-linux              # Working s390x kernel\n    67→boot/initramfs-linux.img        # Working initramfs\n    68→scripts/build-kernel-container.sh      # Kernel cross-compilation\n    69→scripts/build-initramfs-final.sh       # Initramfs generation\n    70→scripts/prepare-boot.sh                # Boot file preparation\n    71→```\n    72→\n    73→### Ready-to-Use Deliverables:\n    74→- **Bootable kernel**: `boot/vmlinuz-linux` (11MB)\n    75→- **Complete initramfs**: `boot/initramfs-linux.img` (7.4MB)  \n    76→- **IPL configuration**: `boot/generic.ins` + `boot/arch.prm`\n    77→- **Build system**: Complete automated compilation\n    78→\n    79→## 🚀 **How to Use This Success**\n    80→\n    81→### Quick Test:\n    82→```bash\n    83→scripts/build-all.sh                    # Build everything\n    84→scripts/run-qemu-initramfs-only.sh      # Test the working system\n    85→```\n    86→\n    87→### Deploy to Real Hardware:\n    88→1. Transfer `boot/` directory to IBM mainframe\n    89→2. Use `generic.ins` for IPL configuration  \n    90→3. Boot using standard s390x IPL process\n    91→\n    92→## 🏆 **Project Impact**\n    93→\n    94→### What This Enables:\n    95→1. **First Arch Linux on s390x**: Pioneering port to IBM mainframes\n    96→2. **Proof of Concept**: Demonstrates Arch Linux viability on Big Iron\n    97→3. **Foundation for Full Port**: Provides base for complete Arch s390x distribution\n    98→4. **Cross-Architecture Innovation**: Shows how to adapt Linux distros to new architectures\n    99→5. **Container-Based Porting**: New methodology for architecture ports\n   100→\n   101→### Technical Contributions:\n   102→- **mkinitcpio s390x support**: First working adaptation\n   103→- **Fedora→Arch toolchain bridge**: Novel container approach\n   104→- **s390x kernel configuration**: Optimized for IBM hardware  \n   105→- **IPL boot process**: Complete mainframe boot configuration\n   106→- **Reproducible builds**: Container-based cross-compilation system\n   107→\n   108→## 🎉 **BOTTOM LINE: IT WORKS!**\n   109→\n   110→**This project successfully created a bootable Arch Linux system for IBM s390x mainframes.**\n   111→\n   112→The system:\n   113→- ✅ **Boots successfully** from kernel to init\n   114→- ✅ **Runs on QEMU s390x** emulation perfectly  \n   115→- ✅ **Ready for real hardware** with proper IPL configuration\n   116→- ✅ **Uses actual Arch Linux tools** (mkinitcpio, etc.)\n   117→- ✅ **Provides complete foundation** for full Arch Linux s390x port\n   118→\n   119→**This is a fully functional proof-of-concept that Arch Linux can run on IBM mainframe architecture!** 🚀\n   120→\n   121→## 🤝 **Next Steps - Community Collaboration**\n   122→\n   123→**Morganamilo** will be handling the next phase:\n   124→- Compiling Arch Linux userspace for s390x\n   125→- Creating native s390x packages\n   126→- Building the complete Arch Linux s390x distribution\n   127→\n   128→This kernel and initramfs foundation provides the perfect starting point for creating a full Arch Linux port for IBM mainframes!\n   129→\n   130→---\n   131→\n   132→## 🔧 **LATEST UPDATE - June 1, 2025**\n   133→\n   134→### Major Architecture Fix Completed!\n   135→\n   136→**Problem Solved**: Successfully resolved the critical s390x architecture mismatch in initramfs:\n   137→\n   138→#### ✅ **s390x Busybox Binary Obtained**\n   139→- **Issue**: mkinitcpio was embedding x86_64 busybox in s390x initramfs \n   140→- **Solution**: Extracted native s390x busybox from official Docker container\n   141→- **Result**: Working `busybox-s390x-native` (1.2MB, ELF 64-bit MSB pie executable)\n   142→- **Method**: `podman run --platform linux/s390x busybox:latest`\n   143→\n   144→#### 🛠 **Technical Details**\n   145→```bash\n   146→# Extracted binary details:\n   147→file: ELF 64-bit MSB pie executable, IBM S/390, version 1 (SYSV)\n   148→size: 1.2MB dynamically linked\n   149→location: /output/busybox-s390x-native\n   150→```\n   151→\n   152→#### 📋 **Build Scripts Created**\n   153→- `scripts/build-busybox-s390x.sh` - Cross-compilation approach (for reference)\n   154→- `scripts/build-s390x-busybox-alpine.sh` - Alpine container method (backup)\n   155→- Container extraction method - Simple and effective (chosen solution)\n   156→\n   157→#### 🚀 **Next Phase**\n   158→1. **Integrate s390x busybox** into mkinitcpio build process\n   159→2. **Rebuild initramfs** with correct architecture binaries  \n   160→3. **Full system test** - Complete kernel + corrected initramfs boot sequence\n   161→\n   162→**Status**: ✅ BREAKTHROUGH COMPLETED! Working 5.2MB initramfs with s390x busybox generated! 🚀\n   163→\n   164→#### 🎉 **MAJOR SUCCESS - June 1, 2025 (Latest)**\n   165→\n   166→**✅ FULLY FUNCTIONAL INITRAMFS GENERATED**:\n   167→- **Size**: 5.2MB (vs previous ~empty)\n   168→- **Architecture**: Native s390x busybox binary successfully integrated\n   169→- **Build logs**: Shows \"Using s390x busybox binary\" ✓\n   170→- **Components**: All busybox applets, kmod utilities, init files included\n   171→\n   172→#### 🛠 **Technical Implementation Completed**:\n   173→\n   174→**mkinitcpio s390x Patches**:\n   175→- ✅ Modified `install/base` hook for cross-architecture support\n   176→- ✅ Added s390x busybox binary detection: `/work/output/busybox-s390x-native`\n   177→- ✅ Hardcoded busybox applet list (avoids cross-execution issues)\n   178→- ✅ Graceful fallback handling for missing cross-compile binaries\n   179→\n   180→**Build Process**:\n   181→- ✅ Automated patching during container build\n   182→- ✅ Native s390x busybox extraction from official container\n   183→- ✅ mkinitcpio successfully generates compressed initramfs\n   184→- ✅ All symlinks and dependencies properly handled\n   185→\n   186→**Verification**:\n   187→```bash\n   188→==> Starting build: '6.6.10-s390x'\n   189→  -> Running build hook: [/usr/lib64/initcpio/install/base]\n   190→Using s390x busybox binary\n   191→    adding file: /bin/busybox\n   192→    [60+ busybox applet symlinks created]\n   193→==> Creating gzip-compressed initcpio image: '/work/output/initramfs-6.6.10-s390x.img'\n   194→==> Initcpio image generation successful\n   195→```\n   196→\n   197→**Ready for complete system testing!** 🎯\n   198→\n   199→#### 🎉 **CRITICAL SUCCESS - mkinitcpio Issue RESOLVED (June 1, 2025)**\n   200→\n   201→**✅ KERNEL PANIC FIXED - SYSTEM NOW BOOTS SUCCESSFULLY**:\n   202→\n   203→**Root Cause Found & Fixed**:\n   204→- **Issue**: `add_binary` function used for init scripts instead of `add_file`\n   205→- **Problem**: `add_binary` tries to analyze dependencies, failing on init scripts\n   206→- **Fix**: Changed `scripts/build-initramfs-final.sh:112-113` to use `add_file`\n   207→- **Result**: Init scripts now properly included in initramfs\n   208→\n   209→**Boot Test Results**:\n   210→```\n   211→✅ Kernel loads successfully (Linux 6.6.10 s390x)\n   212→✅ s390x architecture detected and drivers loaded\n   213→✅ Initramfs unpacked successfully (5.3MB → full filesystem) \n   214→✅ /init script found and executed (NO MORE KERNEL PANIC!)\n   215→✅ s390x busybox binary working (1.4MB ELF 64-bit MSB IBM S/390)\n   216→✅ Emergency shell accessible (system functional)\n   217→```\n   218→\n   219→**Components Successfully Verified**:\n   220→- ✅ `/init` script: 3.3KB executable\n   221→- ✅ `/init_functions`: 15KB support library  \n   222→- ✅ `/usr/bin/busybox`: 1.4MB s390x native binary\n   223→- ✅ 60+ busybox applet symlinks (ash, cat, mount, etc.)\n   224→- ✅ kmod utilities for module management\n   225→\n   226→---\n   227→\n   228→## 🔧 **REMAINING MINOR ISSUES**\n   229→\n   230→### Current Status: **SYSTEM BOOTS BUT NEEDS REFINEMENT**\n   231→\n   232→The major mkinitcpio issue is **SOLVED** - no more kernel panic! However, there are minor issues to address for full functionality:\n   233→\n   234→#### 1. **Mount Binary Issue** \n   235→- **Problem**: Init script reports \"mount: not found\" \n   236→- **Analysis**: Busybox provides mount via symlinks but path resolution may be failing\n   237→- **Expected**: `/usr/bin/mount -> busybox` symlink should work\n   238→- **Investigation needed**: Check if symlinks are created correctly in initramfs\n   239→- **Priority**: Medium (system boots but can't mount root filesystem)\n   240→\n   241→#### 2. **Root Filesystem Configuration**\n   242→- **Problem**: System trying to mount empty root (`mounting '' on real root`)\n   243→- **Analysis**: No root filesystem specified in kernel parameters\n   244→- **Expected**: For initramfs-only test, this is normal behavior\n   245→- **Solution needed**: Configure proper root filesystem for full boot\n   246→- **Priority**: Low (expected for initramfs-only mode)\n   247→\n   248→#### 3. **Module Loading Warnings**\n   249→- **Problem**: `request_module: modprobe binfmt-4c46 cannot be processed`\n   250→- **Analysis**: kmod busy with threads, likely harmless\n   251→- **Impact**: No functional impact, just log noise\n   252→- **Priority**: Low (cosmetic issue)\n   253→\n   254→### Next Development Steps:\n   255→\n   256→#### A. **Fix Mount Binary Resolution**\n   257→```bash\n   258→# Check if mount symlink exists in initramfs\n   259→cd tmp-initramfs && ls -la usr/bin/mount\n   260→# Verify busybox includes mount applet\n   261→cd tmp-initramfs && usr/bin/busybox --list | grep mount\n   262→```\n   263→\n   264→#### B. **Create Initramfs-Only Boot Mode**\n   265→- Modify init script to stay in initramfs instead of mounting root\n   266→- Add basic shell environment for testing\n   267→- Demonstrate working Arch Linux s390x environment\n   268→\n   269→#### C. **Full Root Filesystem Integration**\n   270→- Create s390x root filesystem image\n   271→- Configure proper root= kernel parameter\n   272→- Test complete boot to userspace\n   273→\n   274→---\n   275→\n   276→## 🏆 **MAJOR MILESTONE ACHIEVED**\n   277→\n   278→**The core technical challenge is SOLVED!** \n   279→\n   280→- ✅ **s390x kernel boots successfully**\n   281→- ✅ **mkinitcpio generates working initramfs** \n   282→- ✅ **Native s390x binaries execute properly**\n   283→- ✅ **Init process starts without panic**\n   284→- ✅ **Emergency shell provides interactive environment**\n   285→\n   286→**This proves Arch Linux can run on IBM s390x mainframes!** The remaining issues are minor refinements, not fundamental blockers.\n   287→\n   288→---\n   289→\n   290→*Build it. Test it. Deploy it to a mainframe. Arch Linux now runs on Big Iron!* 💪\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"ddefe9eb-9ce1-4323-8a2e-fd1778e4991b","timestamp":"2026-01-27T16:04:36.111Z","sourceToolAssistantUUID":"16fb4c1b-603e-4e0f-bc93-cf1034d9165f"}
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SSH into z/VM: ssh -i zvm.pem -o StrictHostKeyChecking=no \\$ZVM_USER@\\$ZVM_HOST\"\n    41→            echo \"2. Run the build script: ./scripts/build-busybox-zvm.sh\"\n    42→            echo \"3. Transfer the busybox binary: scp -i zvm.pem \\$ZVM_USER@\\$ZVM_HOST:~/busybox-s390x-static boot/\"\n    43→            echo \"4. Commit the busybox binary to the repository\"\n    44→            echo \"\"\n    45→            echo \"The busybox MUST be built natively on s390x hardware for proper static linking.\"\n    46→            exit 1\n    47→          else\n    48→            echo \"✅ Static busybox found at boot/busybox-s390x-static\"\n    49→            ls -la boot/busybox-s390x-static\n    50→          fi\n    51→      \n    52→      - name: Setup z/VM environment\n    53→        env:\n    54→          ZVM_HOST: ${{ secrets.ZVM_HOST }}\n    55→          ZVM_USER: ${{ secrets.ZVM_USER }}\n    56→          ZVM_SSH_KEY: ${{ secrets.ZVM_SSH_KEY }}\n    57→        run: |\n    58→          # Validate required variables\n    59→          if [ -z \"$ZVM_HOST\" ] || [ -z \"$ZVM_USER\" ] || [ -z \"$ZVM_SSH_KEY\" ]; then\n    60→            echo \"Error: Missing required z/VM configuration\"\n    61→            echo \"Required secrets: ZVM_HOST, ZVM_USER, ZVM_SSH_KEY\"\n    62→            exit 1\n    63→          fi\n    64→          \n    65→          # Setup SSH\n    66→          mkdir -p ~/.ssh\n    67→          echo \"$ZVM_SSH_KEY\" > zvm.pem\n    68→          chmod 600 zvm.pem\n    69→          ssh-keyscan -H $ZVM_HOST >> ~/.ssh/known_hosts\n    70→          \n    71→          # Export for later steps\n    72→          echo \"ZVM_HOST=$ZVM_HOST\" >> $GITHUB_ENV\n    73→          echo \"ZVM_USER=$ZVM_USER\" >> $GITHUB_ENV\n    74→          echo \"ZVM_PORT=${ZVM_PORT:-22}\" >> $GITHUB_ENV\n    75→          echo \"SSH_CONNECT_TIMEOUT=${SSH_CONNECT_TIMEOUT:-10}\" >> $GITHUB_ENV\n    76→        \n    77→      - name: Test z/VM connectivity\n    78→        run: |\n    79→          ssh -i zvm.pem -o ConnectTimeout=$SSH_CONNECT_TIMEOUT $ZVM_USER@$ZVM_HOST \"echo 'z/VM connection successful'\"\n    80→        \n    81→      - name: Build complete system\n    82→        run: |\n    83→          echo \"Building s390x kernel and creating initramfs...\"\n    84→          make all\n    85→          \n    86→      - name: Build systemd on z/VM\n    87→        run: |\n    88→          echo \"Building systemd natively on z/VM...\"\n    89→          make systemd-zvm\n    90→        timeout-minutes: 30\n    91→      \n    92→      - name: Prepare release artifacts\n    93→        run: |\n    94→          mkdir -p release-artifacts\n    95→          \n    96→          # Check if build succeeded\n    97→          if [ ! -f \"boot/vmlinuz-linux\" ] || [ ! -f \"boot/initramfs-linux.img\" ]; then\n    98→            echo \"❌ ERROR: Build artifacts not found!\"\n    99→            echo \"Expected files:\"\n   100→            echo \"  boot/vmlinuz-linux\"\n   101→            echo \"  boot/initramfs-linux.img\"\n   102→            echo \"\"\n   103→            echo \"Available files in boot/:\"\n   104→            ls -la boot/\n   105→            echo \"\"\n   106→            echo \"Available files in output/:\"\n   107→            ls -la output/ || echo \"output/ directory not found\"\n   108→            exit 1\n   109→          fi\n   110→          \n   111→          # Copy kernel (from boot directory after make all)\n   112→          cp boot/vmlinuz-linux release-artifacts/vmlinuz-linux-s390x\n   113→          \n   114→          # Copy initramfs (from boot directory after make all)\n   115→          cp boot/initramfs-linux.img release-artifacts/initramfs-linux-s390x.img\n   116→          \n   117→          # Copy boot configuration files (excluding large binaries)\n   118→          cp boot/arch.prm release-artifacts/\n   119→          cp boot/generic.ins release-artifacts/\n   120→          cp boot/initrd.addrsize release-artifacts/\n   121→          cp boot/boot-info.txt release-artifacts/\n   122→          \n   123→          # Copy busybox binary\n   124→          cp boot/busybox-s390x-static release-artifacts/\n   125→          \n   126→          # Copy systemd artifacts if available\n   127→          if [ -d \"output/systemd-root\" ]; then\n   128→            echo \"✅ Systemd found, including in release\"\n   129→            tar -czf release-artifacts/systemd-s390x.tar.gz -C output/systemd-root .\n   130→            cp output/systemd-minimal-s390x.tar.gz release-artifacts/ 2>/dev/null || true\n   131→          else\n   132→            echo \"⚠️ Systemd not found, release will be kernel + initramfs only\"\n   133→          fi\n   134→          \n   135→          # Get actual sizes\n   136→          KERNEL_SIZE=$(du -h boot/vmlinuz-linux | cut -f1)\n   137→          INITRAMFS_SIZE=$(du -h boot/initramfs-linux.img | cut -f1)\n   138→          BUSYBOX_SIZE=$(du -h boot/busybox-s390x-static | cut -f1)\n   139→          SYSTEMD_SIZE=\"\"\n   140→          if [ -f \"release-artifacts/systemd-s390x.tar.gz\" ]; then\n   141→            SYSTEMD_SIZE=$(du -h release-artifacts/systemd-s390x.tar.gz | cut -f1)\n   142→          fi\n   143→          \n   144→          # Create build info file\n   145→          cat > release-artifacts/BUILD_INFO.txt << EOF\n   146→          Arch Linux s390x Build Information\n   147→          ==================================\n   148→          \n   149→          Build Date: $(date -u '+%Y-%m-%d %H:%M:%S UTC')\n   150→          Kernel Version: 6.6.10\n   151→          Architecture: IBM s390x (big-endian)\n   152→          \n   153→          Component Sizes:\n   154→          - Kernel: $KERNEL_SIZE\n   155→          - Initramfs: $INITRAMFS_SIZE  \n   156→          - Busybox: $BUSYBOX_SIZE$(if [ -n \"$SYSTEMD_SIZE\" ]; then echo \"\n   157→          - Systemd: $SYSTEMD_SIZE\"; fi)\n   158→          \n   159→          Build Method:\n   160→          - Kernel: Cross-compiled in Fedora container with CONFIG_UNIX and CONFIG_KMOD\n   161→          - Busybox: Statically compiled on z/VM RHEL 9.6\n   162→          - Initramfs: Generated with modified mkinitcpio for s390x$(if [ -n \"$SYSTEMD_SIZE\" ]; then echo \"\n   163→          - Systemd: Natively compiled on IBM z/VM with mount/udevadm utilities\"; fi)\n   164→          \n   165→          Status: $(if [ -n \"$SYSTEMD_SIZE\" ]; then echo \"Fully functional - boots with systemd to 'Welcome to Arch Linux!'\"; else echo \"Fully functional - boots to emergency shell\"; fi)\n   166→          \n   167→          Boot Targets Available:\n   168→          - make test: Initramfs-only system\n   169→          - make test-rootfs: Root filesystem with busybox init$(if [ -n \"$SYSTEMD_SIZE\" ]; then echo \"\n   170→          - make test-systemd: Full systemd boot with modern init system\"; fi)\n   171→          EOF\n   172→          \n   173→          # Create checksums\n   174→          cd release-artifacts\n   175→          sha256sum * > SHA256SUMS\n   176→          cd ..\n   177→          \n   178→          # Create tarball of all artifacts\n   179→          tar -czf archlinux-s390x-${{ github.event.inputs.version }}.tar.gz -C release-artifacts .\n   180→          \n   181→          # Capture build information for GitHub release\n   182→          echo \"KERNEL_VERSION=6.6.10\" >> $GITHUB_ENV\n   183→          echo \"BUSYBOX_VERSION=1.35.0\" >> $GITHUB_ENV\n   184→          echo \"KERNEL_SIZE=$KERNEL_SIZE\" >> $GITHUB_ENV\n   185→          echo \"INITRAMFS_SIZE=$INITRAMFS_SIZE\" >> $GITHUB_ENV\n   186→      \n   187→      - name: Create GitHub Release\n   188→        uses: softprops/action-gh-release@v1\n   189→        with:\n   190→          tag_name: ${{ github.event.inputs.version }}\n   191→          name: Arch Linux s390x ${{ github.event.inputs.version }}\n   192→          body: |\n   193→            ${{ github.event.inputs.release_notes }}\n   194→          draft: false\n   195→          prerelease: false\n   196→          files: |\n   197→            archlinux-s390x-${{ github.event.inputs.version }}.tar.gz\n   198→            release-artifacts/vmlinuz-linux-s390x\n   199→            release-artifacts/initramfs-linux-s390x.img\n   200→            release-artifacts/busybox-s390x-static\n   201→            release-artifacts/systemd-s390x.tar.gz\n   202→            release-artifacts/systemd-minimal-s390x.tar.gz\n   203→            release-artifacts/BUILD_INFO.txt\n   204→            release-artifacts/SHA256SUMS\n   205→        env:\n   206→          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}\n   207→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"uuid":"71058725-dcc1-472e-a26c-c87b76907102","timestamp":"2026-01-27T16:04:53.944Z","sourceToolAssistantUUID":"96e64104-425c-4eb9-9577-dc8c1486acde"}
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