Clarify Security Support Status of Different Architectures (#539504)
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Thomas Gerbet
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# Platform Support {#chap-platform-support}
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Packages receive varying degrees of support, both in terms of maintainer attention and available computation resources for continuous integration (CI). We have 7 defined tiers denoting how well supported each platform is.
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Packages receive varying degrees of support, both in terms of maintainer and security team attention and available computation resources for continuous integration (CI). We have 7 defined tiers denoting how well supported each platform is.
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## Tiers {#sec-platform-tiers}
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### Tier 1 {#sec-platform-tier1}
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[Tier 1](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-1) platforms receive the highest level of support where problems can block updates, platform-specific patches are freely applied, and most packages are expected to work.
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[Tier 1](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-1) platforms receive the highest level of support where problems can block updates, security fixes are treated with urgency, platform-specific patches are freely applied, and most packages are expected to work.
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### Tier 2 {#sec-platform-tier2}
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[Tier 2](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-2) platforms are expected to remain functional with updates, receive platform-specific patches as needed, and have many packages built by Hydra with full ofBorg support.
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[Tier 2](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-2) platforms are expected to remain functional and secure with updates, receive platform-specific patches as needed, and have many packages built by Hydra with full ofBorg support.
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### Tier 3 {#sec-platform-tier3}
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@@ -22,25 +22,25 @@ Platform Tiers [4 through 7](https://github.com/NixOS/rfcs/blob/master/rfcs/0046
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## Breakdown {#sec-platform-breakdown}
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| Triple | Support Tier | Channel Blockers | Hydra Support | Ofborg Support | Bootstrap Tarballs | Cross Compiling Support |
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| ------------------------------------- | ------------ | ---------------- | ------------- | -------------- | ------------------ | ----------------------- |
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| `x86_64-unknown-linux-gnu` | [Tier 1](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-1) | Many | ✔️ | ✔️ | ✔️ | ✔️ |
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| `aarch64-unknown-linux-gnu` | [Tier 2](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-2) | Some | ✔️ | ✔️ | ✔️ | ✔️ |
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| `x86_64-unknown-linux-musl` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | Limited | ❌ | ✔️ | ✔️ |
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| `aarch64-unknown-linux-musl` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | Limited | ❌ | ✔️ | ✔️ |
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| `x86_64-unknown-unknown-freebsd` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ✔️ | ✔️ |
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| `arm64-apple-darwin` | [Tier 2](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-2) | Some | ✔️ | ✔️ | ✔️ | ❌ |
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| `i686-unknown-linux-gnu` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | Limited | ❌ | ✔️ | ✔️ |
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| `riscv32-unknown-linux-gnu` | [Tier 4](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-4) | None | ❌ | ❌ | ❌ | ✔️ |
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| `riscv64-unknown-linux-gnu` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ✔️ | ✔️ |
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| `loongarch64-unknown-linux-gnu` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ✔️ | ✔️ |
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| `armv6l-unknown-linux-gnueabihf` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ✔️ | ✔️ |
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| `armv6l-unknown-linux-musleabihf` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ✔️ | ✔️ |
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| `armv7l-unknown-linux-gnueabihf` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ✔️ | ✔️ |
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| `armv5tel-unknown-linux-gnueabi` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ✔️ | ✔️ |
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| `mips64el-unknown-linux-gnuabi64` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ✔️ | ✔️ |
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| `mips64el-unknown-linux-gnuabin32` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ✔️ | ✔️ |
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| `mipsel-unknown-linux-gnu` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ✔️ | ✔️ |
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| `powerpc64-unknown-linux-gnuabielfv2` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ✔️ | ✔️ |
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| `powerpc64le-unknown-linux-gnu` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ✔️ | ✔️ |
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| `s390x-unknown-linux-gnu` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ✔️ | ✔️ |
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| Triple | Support Tier | Channel Blockers | Hydra Support | Security Support | Ofborg Support | Bootstrap Tarballs | Cross Compiling Support |
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|---------------------------------------|------------------------------------------------------------------------------------------------|------------------|---------------|------------------|----------------|--------------------|-------------------------|
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| `x86_64-unknown-linux-gnu` | [Tier 1](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-1) | Many | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ |
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| `aarch64-unknown-linux-gnu` | [Tier 2](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-2) | Some | ✔️ | ✔️ | ✔️ | ✔️ | ✔️ |
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| `x86_64-unknown-linux-musl` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | Limited | ❌ | ❌ | ✔️ | ✔️ |
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| `aarch64-unknown-linux-musl` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | Limited | ❌ | ❌ | ✔️ | ✔️ |
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| `x86_64-unknown-unknown-freebsd` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ❌ | ✔️ | ✔️ |
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| `arm64-apple-darwin` | [Tier 2](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-2) | Some | ✔️ | ✔️ | ✔️ | ✔️ | ❌ |
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| `i686-unknown-linux-gnu` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | Limited | ❌ | ❌ | ✔️ | ✔️ |
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| `riscv32-unknown-linux-gnu` | [Tier 4](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-4) | None | ❌ | ❌ | ❌ | ❌ | ✔️ |
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| `riscv64-unknown-linux-gnu` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ❌ | ✔️ | ✔️ |
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| `loongarch64-unknown-linux-gnu` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ❌ | ✔️ | ✔️ |
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| `armv6l-unknown-linux-gnueabihf` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ❌ | ✔️ | ✔️ |
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| `armv6l-unknown-linux-musleabihf` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ❌ | ✔️ | ✔️ |
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| `armv7l-unknown-linux-gnueabihf` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ❌ | ✔️ | ✔️ |
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| `armv5tel-unknown-linux-gnueabi` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ❌ | ✔️ | ✔️ |
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| `mips64el-unknown-linux-gnuabi64` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ❌ | ✔️ | ✔️ |
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| `mips64el-unknown-linux-gnuabin32` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ❌ | ✔️ | ✔️ |
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| `mipsel-unknown-linux-gnu` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ❌ | ✔️ | ✔️ |
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| `powerpc64-unknown-linux-gnuabielfv2` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ❌ | ✔️ | ✔️ |
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| `powerpc64le-unknown-linux-gnu` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ❌ | ✔️ | ✔️ |
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| `s390x-unknown-linux-gnu` | [Tier 3](https://github.com/NixOS/rfcs/blob/master/rfcs/0046-platform-support-tiers.md#tier-3) | None | ❌ | ❌ | ❌ | ✔️ | ✔️ |
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