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Date:   Thu, 25 Feb 2021 10:02:26 +0800
From:   "Liu, Jing2" <>
To:     Sean Christopherson <>
Cc:     Dave Hansen <>,,
        Vitaly Kuznetsov <>,
        Wanpeng Li <>,
        Jim Mattson <>,
        Joerg Roedel <>,
        Thomas Gleixner <>,
        Ingo Molnar <>, Borislav Petkov <>,, "H. Peter Anvin" <>,,
Subject: Re: [PATCH v1] kvm: x86: Revise guest_fpu xcomp_bv field

On 2/25/2021 4:40 AM, Sean Christopherson wrote:
> On Tue, Feb 23, 2021, Liu, Jing2 wrote:
>> XCOMP_BV[63] field indicates that the save area is in the
>> compacted format and XCOMP_BV[62:0] indicates the states that
>> have space allocated in the save area, including both XCR0
>> and XSS bits enable by the host kernel. Use xfeatures_mask_all
>> for calculating xcomp_bv and reuse XCOMP_BV_COMPACTED_FORMAT
>> defined by kernel.
> Works for me, just please wrap at ~73-75 chars, not ~64.
> Thanks!
Sure, let me update v2.


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