[Intel-SIG] 8.2.1 - Backport LAM Qemu support for SRF · Pull Request !11 · anolis/qemu-kvm

This PR includes [patches](https://patchwork.kernel.org/project/kvm/cover/20240112060042.19925-1-binbin.wu@linux.intel.com/) which support LAM for Qemu.
This patchset is based on v8.2, while backport the patches there is not any conflicts.
The total patch number is 2.

**Description**

Linear-address masking (LAM) [1], modifies the checking that is applied to
*64-bit* linear addresses, allowing software to use of the untranslated
address bits for metadata and masks the metadata bits before using them as
linear addresses to access memory.

When the feature is virtualized and exposed to guest, it can be used for 
efficient
address sanitizers (ASAN) implementation and for optimizations in JITs and 
virtual machines.

The KVM patch series can be found in [2].

[1] Intel ISE https://cdrdv2.intel.com/v1/dl/getContent/671368
    Chapter Linear Address Masking (LAM)
[2] https://lore.kernel.org/kvm/20230913124227.12574-1-binbin.wu@linux.intel.com

**Upstream Commits**

- https://github.com/qemu/qemu/commit/0117067131f9
- https://github.com/qemu/qemu/commit/ba6780905943

**Passed Tests**
1. Kernel LAM kselftests in guest: PASS
2. kvm-unit-tests with LAM on in guest: PASS
3. Qemu unit tests: PASS

类型	指派人员	状态
审查	shannon.zhao 已审查通过 Xuchun Shang 已审查通过	已完成 (2/1人)
测试	shannon.zhao 已测试通过 Xuchun Shang 已测试通过	已完成 (2/1人)

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