From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59653) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1adelw-0003Xu-Rk for qemu-devel@nongnu.org; Wed, 09 Mar 2016 09:07:39 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1adelv-0004A5-Dt for qemu-devel@nongnu.org; Wed, 09 Mar 2016 09:07:32 -0500 References: <1455288361-30117-1-git-send-email-peter.maydell@linaro.org> <56DD9C58.7050306@redhat.com> <56DEBF6A.6070809@redhat.com> <56DEC234.70907@redhat.com> <56DEC860.1060707@redhat.com> <56DECE5F.6000207@redhat.com> <56E02DCD.5060008@redhat.com> From: Paolo Bonzini Message-ID: <56E02E1C.2090207@redhat.com> Date: Wed, 9 Mar 2016 15:07:24 +0100 MIME-Version: 1.0 In-Reply-To: <56E02DCD.5060008@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 0/4] virt: provide secure-only RAM and first flash List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Laszlo Ersek , Ard Biesheuvel Cc: Peter Maydell , qemu-arm , QEMU Developers , Markus Armbruster , "Michael S. Tsirkin" On 09/03/2016 15:06, Laszlo Ersek wrote: > However: despite reusing the core SMM code identically in the guest, > there is at least one stark behavioral difference: in QEMU the SMI is > raised only on the processor that triggers it. This exercises paths in > the core SMM code where processors have to count down timeouts and bring > each other in, and these busy loops are very visible to an interactive > user in certain circumstances. Right, and that's unfortunately something that's hard to change because SeaBIOS relies on it. :(( Paolo