linux-kernel - Re: [PATCH v5 04/12] KVM: SVM: Modify intercept

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CALMp9eSHVS+HmbYUMdRgt9gPQaWUGBHt_owDenPOz4+KiDti5Q@mail.gmail.com>
Date:   Wed, 26 Aug 2020 13:55:09 -0700
From:   Jim Mattson <jmattson@...gle.com>
To:     Babu Moger <babu.moger@....com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Sean Christopherson <sean.j.christopherson@...el.com>,
        Wanpeng Li <wanpengli@...cent.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 v5 04/12] KVM: SVM: Modify intercept_exceptions to generic intercepts

On Wed, Aug 26, 2020 at 12:14 PM Babu Moger <babu.moger@....com> wrote:
>
> Modify intercept_exceptions to generic intercepts in vmcb_control_area. Use
> the generic vmcb_set_intercept, vmcb_clr_intercept and vmcb_is_intercept to
> set/clear/test the intercept_exceptions bits.
>
> Signed-off-by: Babu Moger <babu.moger@....com>
> Reviewed-by: Jim Mattson <jmattson@...gle.com>
> ---

> @@ -835,7 +832,7 @@ static bool nested_exit_on_exception(struct vcpu_svm *svm)
>  {
>         unsigned int nr = svm->vcpu.arch.exception.nr;
>
> -       return (svm->nested.ctl.intercept_exceptions & (1 << nr));
> +       return (svm->nested.ctl.intercepts[EXCEPTION_VECTOR] & (1 << nr));
Nit: BIT(nr) rather than (1 << nr).