[LinuxBIOS] Re: x86_64: calibrate_delay_direct and apic id lift for BSP
yinghai.lu at amd.com
Fri Oct 28 22:19:45 CEST 2005
I wonder if 8111 only support 4 bit apicid, so it can not send irq to
BSP at apic id 0x10....
On 10/28/05, Lu, Yinghai <yinghai.lu at amd.com> wrote:
> I have tried latest code..., except that, it works well.
> -----Original Message-----
> From: Andi Kleen [mailto:ak at suse.de]
> Sent: Friday, October 28, 2005 11:53 AM
> To: Lu, Yinghai
> Cc: discuss at x86-64.org; linux-kernel at vger.kernel.org;
> linuxbios at openbios.org
> Subject: Re: x86_64: calibrate_delay_direct and apic id lift for BSP
> On Friday 28 October 2005 20:42, Yinghai Lu wrote:
> > andi,
> > I tried to lift apic id in LinuxBIOS for all cpus after 0x10.
> > When using MB with AMD8111, the jiffies was not moving. So it is
> > locked at calibrate_delay_direct...
> Have you tried it with 2.6.14? It has some new code to handle
> high apic ids better
> > but MB with Nvidia ck804, jiffies is moving.
> The timer is wired different on nvidia than on 8111. They can
> go either through the 8259 or through the IOAPIC. There is still
> some code that falls back to the 8259 if IOAPIC doesn't work,
> which may make it appear working on Nvidia.
> As a warning I'm about to remove that code so don't rely on it.
> > If I don't change BSP apic id ( keep it to 0), It changes....
> > I have no idea how the jiffies changes, there is another thread change
> They change when interrupt 0 fires. So it's probably misrouted
> or similar.
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