linux-kernel - Re: [PATCH] x86/kvm: virt_xxx memory barriers instead of mandatory barriers

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] [day] [month] [year] [list]

Message-ID: <20170412190432.GE20145@potion>
Date:   Wed, 12 Apr 2017 21:04:33 +0200
From:   Radim Krčmář <rkrcmar@...hat.com>
To:     Wanpeng Li <kernellwp@...il.com>
Cc:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Paolo Bonzini <pbonzini@...hat.com>,
        Wanpeng Li <wanpeng.li@...mail.com>
Subject: Re: [PATCH] x86/kvm: virt_xxx memory barriers instead of mandatory
 barriers

2017-04-11 02:49-0700, Wanpeng Li:
> From: Wanpeng Li <wanpeng.li@...mail.com>
> 
> virt_xxx memory barriers are implemented trivially using the low-level 
> __smp_xxx macros, __smp_xxx is equal to a compiler barrier for strong 
> TSO memory model, however, mandatory barriers will unconditional add 
> memory barriers, this patch replaces the rmb() in kvm_steal_clock() by 
> virt_rmb().
> 
> Cc: Paolo Bonzini <pbonzini@...hat.com>
> Cc: Radim Krčmář <rkrcmar@...hat.com>
> Signed-off-by: Wanpeng Li <wanpeng.li@...mail.com>
> ---

Applied to kvm/queue, thanks.