linux-kernel - Re: [PATCH v11 00/16] LAM and LASS KVM Enabling

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Message-ID: <b60c5dbd-9a69-6244-ea88-bea70bca8ee7@linux.intel.com>
Date:   Tue, 24 Oct 2023 16:31:12 +0800
From:   Binbin Wu <binbin.wu@...ux.intel.com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        pbonzini@...hat.com, chao.gao@...el.com, kai.huang@...el.com,
        David.Laight@...LAB.COM, robert.hu@...ux.intel.com,
        guang.zeng@...el.com
Subject: Re: [PATCH v11 00/16] LAM and LASS KVM Enabling



On 10/24/2023 7:43 AM, Sean Christopherson wrote:
> On Wed, 13 Sep 2023 20:42:11 +0800, Binbin Wu wrote:
>> This patch series includes KVM enabling patches for Linear-address masking
>> (LAM) v11 and Linear Address Space Separation (LASS) v3 since the two features
>> have overlapping prep work and concepts. Sent as a single series to reduce the
>> probability of conflicts.
>>
>> The patch series is organized as follows:
>> - Patch 1-4: Common prep work for both LAM and LASS.
>> - Patch 5-13: LAM part.
>> - Patch 14-16: LASS part.
>>
>> [...]
> Applied to kvm-x86 lam (for 6.8)!  I skipped the LASS patches, including patch 2
> (the branch targets patch).  I kept the IMPLICIT emulator flag even thought it's
> not strictly needed as it's a nice way to document non-existent code.
>
> I massaged a few changelogs and fixed the KVM_X86_OP_OPTIONAL() issue, but
> otherwise I don't think I made any code changes (it's been a long day :-) ).
> Please take a look to make sure it all looks good.
Hi Sean,
Thanks for changelogs massage and the KVM_X86_OP_OPTIONAL() issue fix.
The LAM patches were applied as expected.


>
> Thanks!
>
> [01/16] KVM: x86: Consolidate flags for __linearize()
>          https://github.com/kvm-x86/linux/commit/81c940395b14
> [02/16] KVM: x86: Use a new flag for branch targets
>          (no commit info)
> [03/16] KVM: x86: Add an emulation flag for implicit system access
>          https://github.com/kvm-x86/linux/commit/90532843aebf
> [04/16] KVM: x86: Add X86EMUL_F_INVLPG and pass it in em_invlpg()
>          https://github.com/kvm-x86/linux/commit/34b4ed7c1eaf
> [05/16] KVM: x86/mmu: Drop non-PA bits when getting GFN for guest's PGD
>          https://github.com/kvm-x86/linux/commit/8b83853c5c98
> [06/16] KVM: x86: Add & use kvm_vcpu_is_legal_cr3() to check CR3's legality
>          https://github.com/kvm-x86/linux/commit/82ba7169837e
> [07/16] KVM: x86: Remove kvm_vcpu_is_illegal_gpa()
>          https://github.com/kvm-x86/linux/commit/95df55ee42fe
> [08/16] KVM: x86: Introduce get_untagged_addr() in kvm_x86_ops and call it in emulator
>          https://github.com/kvm-x86/linux/commit/7a747b6c84a1
> [09/16] KVM: x86: Untag address for vmexit handlers when LAM applicable
>          https://github.com/kvm-x86/linux/commit/ef99001b30a8
> [10/16] KVM: x86: Virtualize LAM for supervisor pointer
>          https://github.com/kvm-x86/linux/commit/4daea9a5183f
> [11/16] KVM: x86: Virtualize LAM for user pointer
>          https://github.com/kvm-x86/linux/commit/0cadc474eff0
> [12/16] KVM: x86: Advertise and enable LAM (user and supervisor)
>          https://github.com/kvm-x86/linux/commit/6ef90ee226f1
> [13/16] KVM: x86: Use KVM-governed feature framework to track "LAM enabled"
>          https://github.com/kvm-x86/linux/commit/b291db540763
> [14/16] KVM: emulator: Add emulation of LASS violation checks on linear address
>          (no commit info)
> [15/16] KVM: VMX: Virtualize LASS
>          (no commit info)
> [16/16] KVM: x86: Advertise LASS CPUID to user space
>          (no commit info)
>
> --
> https://github.com/kvm-x86/linux/tree/next