linux-kernel - Re: [PATCH 00/11] KVM: selftests: AVX support + fixes

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Message-ID: <ZyUsoew4e3XQQEvr@google.com>
Date: Fri, 1 Nov 2024 12:31:45 -0700
From: Sean Christopherson <seanjc@...gle.com>
To: Paolo Bonzini <pbonzini@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Vitaly Kuznetsov <vkuznets@...hat.com>
Subject: Re: [PATCH 00/11] KVM: selftests: AVX support + fixes

On Thu, Oct 31, 2024, Sean Christopherson wrote:
> On Thu, 03 Oct 2024 16:43:26 -0700, Sean Christopherson wrote:
> > Enable CR4.OSXSAVE and XCR0.AVX by default when creating selftests vCPUs
> > in order to play nice with compilers that have been configured to enable
> > -march=x86-64-v3 by default.
> > 
> > While it would be easier to force v2 (or earlier), there are enough tests
> > that want XCR0 configured that it will (hopefully) be a net postive to
> > enable all XCR0 features by default.
> > 
> > [...]
> 
> Applied to kvm-x86 selftests, minus patch 1 which went into 6.12.  At some point
> in the 6.13 cycle I'll send a revert for the "march" madness.
> 
> [01/11] KVM: selftests: Fix out-of-bounds reads in CPUID test's array lookups
>         (no commit info)
> [02/11] KVM: selftests: Precisely mask off dynamic fields in CPUID test
>         https://github.com/kvm-x86/linux/commit/c0124e2e74a7
> [03/11] KVM: selftests: Mask off OSPKE and OSXSAVE when comparing CPUID entries
>         https://github.com/kvm-x86/linux/commit/01e2827157ef
> [04/11] KVM: selftests: Rework OSXSAVE CR4=>CPUID test to play nice with AVX insns
>         https://github.com/kvm-x86/linux/commit/cf50f01336d3
> [05/11] KVM: selftests: Configure XCR0 to max supported value by default
>         https://github.com/kvm-x86/linux/commit/331b8ddaebc1
> [06/11] KVM: selftests: Verify XCR0 can be "downgraded" and "upgraded"
>         https://github.com/kvm-x86/linux/commit/d87b459428c0
> [07/11] KVM: selftests: Drop manual CR4.OSXSAVE enabling from CR4/CPUID sync test
>         https://github.com/kvm-x86/linux/commit/86502f01b8b9
> [08/11] KVM: selftests: Drop manual XCR0 configuration from AMX test
>         https://github.com/kvm-x86/linux/commit/fd7b6d77fa6d
> [09/11] KVM: selftests: Drop manual XCR0 configuration from state test
>         https://github.com/kvm-x86/linux/commit/818646fea3ea
> [10/11] KVM: selftests: Drop manual XCR0 configuration from SEV smoke test
>         https://github.com/kvm-x86/linux/commit/ce22d24024ea
> [11/11] KVM: selftests: Ensure KVM supports AVX for SEV-ES VMSA FPU test
>         https://github.com/kvm-x86/linux/commit/08cc7ab1a6ca

And because I mucked up the mmu_stress_test/vcpu_get_reg() series and had to yank
it out, the hashes for this series got changed:

[02/11] KVM: selftests: Precisely mask off dynamic fields in CPUID test
        https://github.com/kvm-x86/linux/commit/f2c5aa31670d
[03/11] KVM: selftests: Mask off OSPKE and OSXSAVE when comparing CPUID entries
        https://github.com/kvm-x86/linux/commit/164cea33bfed
[04/11] KVM: selftests: Rework OSXSAVE CR4=>CPUID test to play nice with AVX insns
        https://github.com/kvm-x86/linux/commit/2b9a126a2986
[05/11] KVM: selftests: Configure XCR0 to max supported value by default
        https://github.com/kvm-x86/linux/commit/8b14c4d85d03
[06/11] KVM: selftests: Verify XCR0 can be "downgraded" and "upgraded"
        https://github.com/kvm-x86/linux/commit/8ae01bf64caa
[07/11] KVM: selftests: Drop manual CR4.OSXSAVE enabling from CR4/CPUID sync test
        https://github.com/kvm-x86/linux/commit/3678c7f6114f
[08/11] KVM: selftests: Drop manual XCR0 configuration from AMX test
        https://github.com/kvm-x86/linux/commit/d87331890a38
[09/11] KVM: selftests: Drop manual XCR0 configuration from state test
        https://github.com/kvm-x86/linux/commit/28439090ece6
[10/11] KVM: selftests: Drop manual XCR0 configuration from SEV smoke test
        https://github.com/kvm-x86/linux/commit/3c4c128d02ed
[11/11] KVM: selftests: Ensure KVM supports AVX for SEV-ES VMSA FPU test
        https://github.com/kvm-x86/linux/commit/89f8869835e4