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Re: [Xen-devel] [edk2-devel] [PATCH v4 29/35] OvmfPkg/OvmfXen: Override PcdFSBClock to Xen vLAPIC timer frequency

To: Roger Pau Monné <roger.pau@xxxxxxxxxx>
From: Anthony PERARD <anthony.perard@xxxxxxxxxx>
Date: Thu, 8 Aug 2019 14:28:32 +0100
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Cc: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>, Jordan Justen <jordan.l.justen@xxxxxxxxx>, devel@xxxxxxxxxxxxxx, Julien Grall <julien.grall@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, Laszlo Ersek <lersek@xxxxxxxxxx>
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List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On Wed, Aug 07, 2019 at 05:54:51PM +0200, Roger Pau Monné wrote:
> On Mon, Jul 29, 2019 at 04:39:38PM +0100, Anthony PERARD wrote:
> > PcdFSBClock is used by SecPeiDxeTimerLibCpu, the TimerLib
> > implementation. It will also be used by XenTimerDxe. Override
> > PcdFSBClock to match Xen vLAPIC timer frequency.
> 
> I'm kind of surprised that his is not automatically detected?
> 
> Is it a bug in Xen or just always hardcoded on OVMF?

It's hardcoded. Why would you need auto detection when you always run on
the same machine ;-).

-- 
Anthony PERARD

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Follow-Ups:
- Re: [Xen-devel] [edk2-devel] [PATCH v4 29/35] OvmfPkg/OvmfXen: Override PcdFSBClock to Xen vLAPIC timer frequency
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References:
- Re: [Xen-devel] [edk2-devel] [PATCH v4 29/35] OvmfPkg/OvmfXen: Override PcdFSBClock to Xen vLAPIC timer frequency
  - From: Roger Pau Monné

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