linux-kernel - Re: [PATCH v3 05/11] KVM: SVM: Modify 64 bit intercept field to two 32 bit vectors

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Date:   Wed, 29 Jul 2020 14:06:21 -0700
From:   Jim Mattson <jmattson@...gle.com>
To:     Babu Moger <babu.moger@....com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        kvm list <kvm@...r.kernel.org>, Joerg Roedel <joro@...tes.org>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH v3 05/11] KVM: SVM: Modify 64 bit intercept field to two
 32 bit vectors

On Tue, Jul 28, 2020 at 4:38 PM Babu Moger <babu.moger@....com> wrote:
>
> Convert all the intercepts to one array of 32 bit vectors in
> vmcb_control_area. This makes it easy for future intercept vector
> additions.  Also update trace functions.
>
> Signed-off-by: Babu Moger <babu.moger@....com>
> ---

> @@ -128,8 +129,7 @@ enum {
>
>  struct __attribute__ ((__packed__)) vmcb_control_area {
>         u32 intercepts[MAX_VECTORS];
> -       u64 intercept;
> -       u8 reserved_1[40];
> +       u8 reserved_1[60 - (MAX_VECTORS * 4)];

Perhaps this could be simplified to 'u32 reserved_1[15 - MAX_VECTORS];'

>         u16 pause_filter_thresh;
>         u16 pause_filter_count;
>         u64 iopm_base_pa;

Reviewed-by: Jim Mattson <jmattson@...gle.com>