From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44251) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YRMpr-0004QH-SY for qemu-devel@nongnu.org; Fri, 27 Feb 2015 10:28:16 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YRMpm-00053p-Pw for qemu-devel@nongnu.org; Fri, 27 Feb 2015 10:28:15 -0500 Message-ID: <54F08D09.6050508@suse.de> Date: Fri, 27 Feb 2015 16:28:09 +0100 From: Alexander Graf MIME-Version: 1.0 References: <1424992797-10016-1-git-send-email-cyril.bur@au1.ibm.com> In-Reply-To: <1424992797-10016-1-git-send-email-cyril.bur@au1.ibm.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [Qemu-ppc] [PATCH v2] PPC: Introduce the Virtual Time Base (VTB) SPR register List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Cyril Bur , qemu-ppc@nongnu.org Cc: qemu-devel@nongnu.org On 27.02.15 00:19, Cyril Bur wrote: > This patch adds basic support for the VTB. > > PowerISA: > The Virtual Time Base (VTB) is a 64-bit incrementing counter. > Virtual Time Base increments at the same rate as the Time Base until its value > becomes 0xFFFF_FFFF_FFFF_FFFF (2 64 - 1); at the next increment its value > becomes 0x0000_0000_0000_0000. There is no interrupt or other indication when > this occurs. > > The operation of the Virtual Time Base has the following additional > properties. > 1. Loading a GPR from the Virtual Time Base has no effect on the accuracy of > the Virtual Time Base. > 2. Copying the contents of a GPR to the Virtual Time Base replaces the > contents of the Virtual Time Base with the contents of the GPR. > > Signed-off-by: Cyril Bur Thanks, applied to ppc-next. Alex