Re: [PATCH v9 19/22] KVM: nVMX: Handle FRED VMCS fields in nested VMX context
From: Xin Li
Date: Tue Jan 20 2026 - 13:11:22 EST
> On Jan 20, 2026, at 8:07 AM, Dave Hansen <dave.hansen@xxxxxxxxx> wrote:
>
> On 1/19/26 22:30, Xin Li wrote:
>>> On Dec 1, 2025, at 10:32 PM, Chao Gao <chao.gao@xxxxxxxxx> wrote:
>>>> + nested_vmx_set_intercept_for_msr(vmx, msr_bitmap_l1, msr_bitmap_l0,
>>>> + MSR_IA32_FRED_RSP0, MSR_TYPE_RW);
>>> Why is only this specific MSR handled? What about other FRED MSRs?
>> Peter just gave a good explanation:
>>
>> https://lore.kernel.org/lkml/f0768546-a767-4d74-956e-b40128272a09@xxxxxxxxx/
>
> Yup! It would be great to get some of that content into the changelogs
> and comments.
Sure, I will do it with Peter :)
And we already have a document file: Documentation/arch/x86/x86_64/fred.rst.
I think the comment is more for native, right?