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Re: [Qemu-devel] [edk2-devel] [PATCH] q35: lpc: allow to lock down 128K
From: |
Igor Mammedov |
Subject: |
Re: [Qemu-devel] [edk2-devel] [PATCH] q35: lpc: allow to lock down 128K RAM at default SMBASE address |
Date: |
Tue, 17 Sep 2019 15:11:21 +0200 |
On Wed, 11 Sep 2019 19:30:46 +0200
"Laszlo Ersek" <address@hidden> wrote:
> On 09/10/19 17:58, Igor Mammedov wrote:
> > On Mon, 9 Sep 2019 21:15:44 +0200
> > Laszlo Ersek <address@hidden> wrote:
>
> [...]
>
> > It looks like fwcfg smi feature negotiation isn't reusable in this case.
> > I'd prefer not to add another device just for another SMI feature
> > negotiation/activation.
>
> I thought it could be a register on the new CPU hotplug controller that
> we're going to need anyway (if I understand correctly, at least).
If we don't have to 'park' hotplugged CPUs, then I don't see a need for
an extra controller.
> But:
>
> > How about stealing reserved register from pci-host similar to your
> > extended TSEG commit (2f295167 q35/mch: implement extended TSEG sizes)?
> > (Looking into spec can (ab)use 0x58 or 0x59 register)
>
> Yes, that should work.
>
> In fact, I had considered 0x58 / 0x59 when looking for unused registers
> for extended TSEG configuration:
>
> http://mid.mail-archive.com/address@hidden
>
> So I'm OK with this, thank you.
Thanks for the tip!
... patches with a stolen register are on the way to mail-list.
- Re: [Qemu-devel] [edk2-rfc] [edk2-devel] CPU hotplug using SMM with QEMU+OVMF, (continued)
- Re: [Qemu-devel] [edk2-rfc] [edk2-devel] CPU hotplug using SMM with QEMU+OVMF, Igor Mammedov, 2019/09/03
- Re: [Qemu-devel] [edk2-rfc] [edk2-devel] CPU hotplug using SMM with QEMU+OVMF, Laszlo Ersek, 2019/09/03
- Re: [Qemu-devel] [edk2-rfc] [edk2-devel] CPU hotplug using SMM with QEMU+OVMF, Igor Mammedov, 2019/09/04
- Re: [Qemu-devel] [edk2-rfc] [edk2-devel] CPU hotplug using SMM with QEMU+OVMF, Laszlo Ersek, 2019/09/05
- Re: [Qemu-devel] [edk2-rfc] [edk2-devel] CPU hotplug using SMM with QEMU+OVMF, Igor Mammedov, 2019/09/05
- [Qemu-devel] [PATCH] q35: lpc: allow to lock down 128K RAM at default SMBASE address, Igor Mammedov, 2019/09/05
- Re: [Qemu-devel] [PATCH] q35: lpc: allow to lock down 128K RAM at default SMBASE address, Laszlo Ersek, 2019/09/09
- Re: [Qemu-devel] [PATCH] q35: lpc: allow to lock down 128K RAM at default SMBASE address, Laszlo Ersek, 2019/09/09
- Re: [Qemu-devel] [PATCH] q35: lpc: allow to lock down 128K RAM at default SMBASE address, Igor Mammedov, 2019/09/10
- Re: [Qemu-devel] [PATCH] q35: lpc: allow to lock down 128K RAM at default SMBASE address, Laszlo Ersek, 2019/09/11
- Re: [Qemu-devel] [edk2-devel] [PATCH] q35: lpc: allow to lock down 128K RAM at default SMBASE address,
Igor Mammedov <=