From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcelo Tosatti Subject: Re: [PATCH] [ACPI] Enable direct GSI mapping for APIC Date: Fri, 2 May 2008 12:35:38 -0300 Message-ID: <20080502153538.GA12124@dmt> References: <481B2B5C.50602@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel@lists.sourceforge.net To: Alexander Graf Return-path: Content-Disposition: inline In-Reply-To: <481B2B5C.50602@suse.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces@lists.sourceforge.net Errors-To: kvm-devel-bounces@lists.sourceforge.net List-Id: kvm.vger.kernel.org On Fri, May 02, 2008 at 04:55:24PM +0200, Alexander Graf wrote: > Hi, > > in the DSDT there are two different ways of defining, how an interrupt > is supposed to be routed. Currently we are using the LNKA - LNKD method, > which afaict is for legacy support. > The other method is to directly tell the Operating System, which APIC > pin the device is attached to. We can get that information from the very > same entry, the LNKA to LNKD pseudo devices receive it. > > For now this does not give any obvious improvement. It does leave room > for more advanced mappings, with several IOAPICs that can handle more > devices separately. This might help when we have a lot of devices, as > currently all devices sit on two interrupt lanes. > > More importantly (for me) though, is that Darwin enables the APIC mode > unconditionally, so it won't easily run in legacy mode. Hi Alexander, I'm just about to resend the patchset to add 3 PCI bridges, which already adds the _SUN method appropriately. Please rebase the APRT patch on top of that. Thanks! ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone