Merge tag 'kvm-x86-2025.02.21' of https://github.com/kvm-x86/kvm-unit-tests into HEAD

KVM-Unit-Tests x86 changes:

- Expand the per-CPU data+stack area to 12KiB per CPU to reduce the
probability

Merge tag 'kvm-x86-2025.02.21' of https://github.com/kvm-x86/kvm-unit-tests into HEAD

KVM-Unit-Tests x86 changes:

- Expand the per-CPU data+stack area to 12KiB per CPU to reduce the
probability of tests overflowing their stack and clobbering pre-CPU
data.

- Add testcases for LA57 canonical checks.

- Add testcases for LAM.

- Add a smoke test to make sure KVM doesn't bleed split-lock #AC/#DB into
the guest.

- Fix many warts and bugs in the PMU test, and prepare it for PMU version 5
and beyond.

- Many misc fixes and cleanups.

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x86: Add test cases for LAM_{U48,U57}

This unit test covers:
1. CR3 LAM bits toggles.
2. Memory/MMIO access with user mode address containing LAM metadata.

Signed-off-by: Binbin Wu <binbin.wu@linux

x86: Add test cases for LAM_{U48,U57}

This unit test covers:
1. CR3 LAM bits toggles.
2. Memory/MMIO access with user mode address containing LAM metadata.

Signed-off-by: Binbin Wu <binbin.wu@linux.intel.com>
Reviewed-by: Chao Gao <chao.gao@intel.com>
Link: https://lore.kernel.org/r/20240701073010.91417-5-binbin.wu@linux.intel.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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x86: Add test case for LAM_SUP

This unit test covers:
1. CR4.LAM_SUP toggles.
2. Memory & MMIO access with supervisor mode address with LAM metadata.
3. INVLPG memory operand doesn't contain LAM met

x86: Add test case for LAM_SUP

This unit test covers:
1. CR4.LAM_SUP toggles.
2. Memory & MMIO access with supervisor mode address with LAM metadata.
3. INVLPG memory operand doesn't contain LAM meta data, if the address
is non-canonical form then the INVLPG is the same as a NOP (no #GP).
4. INVPCID memory operand (descriptor pointer) could contain LAM meta data,
however, the address in the descriptor should be canonical.

In x86/unittests.cfg, add 2 test cases/guest conf, with and without LAM.

LAM feature spec: https://cdrdv2.intel.com/v1/dl/getContent/671368,
Chapter LINEAR ADDRESS MASKING (LAM)

Signed-off-by: Robert Hoo <robert.hu@linux.intel.com>
Co-developed-by: Binbin Wu <binbin.wu@linux.intel.com>
Signed-off-by: Binbin Wu <binbin.wu@linux.intel.com>
Reviewed-by: Chao Gao <chao.gao@intel.com>
Link: https://lore.kernel.org/r/20240701073010.91417-4-binbin.wu@linux.intel.com
[sean: s/set/get for the helper, smush tests, call it "lam", use "-cpu max"]
Signed-off-by: Sean Christopherson <seanjc@google.com>

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