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description/arch: tlb ipi

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Cheng Jian
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@@ -131,11 +131,21 @@ Intel Architecture Day 2021, 官宣了自己的服务于终端和桌面场景的
## 2.2 TLB
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### 2.2.1 TLB range
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| 时间 | 作者 | 特性 | 描述 | 是否合入主线 | 链接 |
|:----:|:----:|:---:|:----:|:---------:|:----:|
| 2020/06/25 | Tianjia Zhang <tianjia.zhang@linux.alibaba.com> | [arm64: tlb: add support for TTL feature](https://patchwork.kernel.org/project/linux-arm-kernel/cover/20200625080314.230-1-yezhenyu2@huawei.com) | 为了降低 TLB 失效的成本, ARMv8.4 在 TLBI 指令中提供了 TTL 字段. TTL 字段表示保存被失效地址的叶条目的页表遍历级别. 这组补丁实现了对 TTL 的支持. | v4 ☑ 5.9-rc1 | [Patchwork RESEND,v5,0/6](https://patchwork.kernel.org/project/linux-arm-kernel/cover/20200625080314.230-1-yezhenyu2@huawei.com) |
| 2020/07/15 | Zhenyu Ye <yezhenyu2@huawei.com> | [arm64: tlb: Use the TLBI RANGE feature in arm64](https://lore.kernel.org/linux-crypto/20210818033117.91717-1-tianjia.zhang@linux.alibaba.com) | 为 ARM64 实现 CONFIG_ARM64_TLB_RANGE, 在实现了 ARM64_HAS_TLB_RANGE 的机器上使用此 feature 实现了 `__flush_tlb_range()` | v3 ☑ 5.9-rc1 | [2020/07/08 PatchWork RFC,v5,0/2](https://patchwork.kernel.org/project/linux-arm-kernel/cover/20200708124031.1414-1-yezhenyu2@huawei.com)<br>*-*-*-*-*-*-*-* <br>[2020/07/09 PatchWork v1,0/2](https://patchwork.kernel.org/project/linux-arm-kernel/cover/20200710094420.517-1-yezhenyu2@huawei.com)<br>*-*-*-*-*-*-*-* <br>[2020/07/10 PatchWork v2,0/2](https://patchwork.kernel.org/project/linux-arm-kernel/cover/20200710094420.517-1-yezhenyu2@huawei.com)<br>*-*-*-*-*-*-*-* <br>[2020/07/15 Patchwork v3,0/3](https://patchwork.kernel.org/project/linux-arm-kernel/cover/20200715071945.897-1-yezhenyu2@huawei.com) |
### 2.2.2 TLB IPI
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| 时间 | 作者 | 特性 | 描述 | 是否合入主线 | 链接 |
|:----:|:----:|:---:|:----:|:---------:|:----:|
| 2020/06/25 | Tianjia Zhang <tianjia.zhang@linux.alibaba.com> | [arm64, mm: Use IPIs for TLB invalidation.](http://lists.infradead.org/pipermail/linux-arm-kernel/2015-July/355866.htm) | 在 Cavium ThunderX (ARM64) 的机器上, 某些场景下不能使用广播 TLB, TLB 广播风暴会导致严重的性能问题, 所以我们在必要时使用 IPIs. 测试发现, 它还使内核构建的速度更快. | v1 ☐ | [Patchwork 0/3](https://patchwork.kernel.org/project/linux-arm-kernel/cover/20200625080314.230-1-yezhenyu2@huawei.com) |
## 2.3 指令加速
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