linux-kernel - Re: [PATCH V3 01/13] x86/HV: Initialize GHCB page in Isolation VM

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: <20210810105609.soi67eg2us5w7yuq@liuwe-devbox-debian-v2>
Date:   Tue, 10 Aug 2021 10:56:09 +0000
From:   Wei Liu <wei.liu@...nel.org>
To:     Tianyu Lan <ltykernel@...il.com>
Cc:     kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
        wei.liu@...nel.org, decui@...rosoft.com, tglx@...utronix.de,
        mingo@...hat.com, bp@...en8.de, x86@...nel.org, hpa@...or.com,
        dave.hansen@...ux.intel.com, luto@...nel.org, peterz@...radead.org,
        konrad.wilk@...cle.com, boris.ostrovsky@...cle.com,
        jgross@...e.com, sstabellini@...nel.org, joro@...tes.org,
        will@...nel.org, davem@...emloft.net, kuba@...nel.org,
        jejb@...ux.ibm.com, martin.petersen@...cle.com, arnd@...db.de,
        hch@....de, m.szyprowski@...sung.com, robin.murphy@....com,
        thomas.lendacky@....com, brijesh.singh@....com, ardb@...nel.org,
        Tianyu.Lan@...rosoft.com, pgonda@...gle.com,
        martin.b.radev@...il.com, akpm@...ux-foundation.org,
        kirill.shutemov@...ux.intel.com, rppt@...nel.org,
        sfr@...b.auug.org.au, saravanand@...com,
        krish.sadhukhan@...cle.com, aneesh.kumar@...ux.ibm.com,
        xen-devel@...ts.xenproject.org, rientjes@...gle.com,
        hannes@...xchg.org, tj@...nel.org, michael.h.kelley@...rosoft.com,
        iommu@...ts.linux-foundation.org, linux-arch@...r.kernel.org,
        linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-scsi@...r.kernel.org, netdev@...r.kernel.org,
        vkuznets@...hat.com, parri.andrea@...il.com, dave.hansen@...el.com
Subject: Re: [PATCH V3 01/13] x86/HV: Initialize GHCB page in Isolation VM

On Mon, Aug 09, 2021 at 01:56:05PM -0400, Tianyu Lan wrote:
[...]
>  static int hv_cpu_init(unsigned int cpu)
>  {
>  	union hv_vp_assist_msr_contents msr = { 0 };
> @@ -85,6 +111,8 @@ static int hv_cpu_init(unsigned int cpu)
>  		}
>  	}
>  
> +	hyperv_init_ghcb();
> +

Why is the return value not checked here? If that's not required, can
you leave a comment?

Wei.