linux-kernel - Re: [PATCH v2.1] KVM: SVM: Add support for AMD's OSVW feature in guests

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]

Date:	Mon, 9 Jan 2012 10:14:09 -0200
From:	Marcelo Tosatti <mtosatti@...hat.com>
To:	Boris Ostrovsky <ostr@...64.org>
Cc:	avi@...hat.com, Joerg.Roedel@....com, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, boris.ostrovsky@....com
Subject: Re: [PATCH v2.1] KVM: SVM: Add support for AMD's OSVW feature in
 guests

On Fri, Jan 06, 2012 at 11:13:56AM -0500, Boris Ostrovsky wrote:
> From: Boris Ostrovsky <boris.ostrovsky@....com>
> 
> In some cases guests should not provide workarounds for errata even when the
> physical processor is affected. For example, because of erratum 400 on family
> 10h processors a Linux guest will read an MSR (resulting in VMEXIT) before
> going to idle in order to avoid getting stuck in a non-C0 state. This is not
> necessary: HLT and IO instructions are intercepted and therefore there is no
> reason for erratum 400 workaround in the guest.
> 
> This patch allows us to present a guest with certain errata as fixed,
> regardless of the state of actual hardware.
> 
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@....com>

Patch does not apply, please regenerate against
git://git.kernel.org/pub/scm/virt/kvm/kvm.git master branch.

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/