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Re: [Qemu-arm] [Qemu-devel] [RFC 0/2] ARM virt: Support up to 256 PCIe b
From: |
Auger Eric |
Subject: |
Re: [Qemu-arm] [Qemu-devel] [RFC 0/2] ARM virt: Support up to 256 PCIe buses |
Date: |
Thu, 24 May 2018 15:10:41 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 |
Hi Peter, Laszlo,
On 05/24/2018 03:07 PM, Peter Maydell wrote:
> On 24 May 2018 at 13:59, Laszlo Ersek <address@hidden> wrote:
>> On 05/24/18 11:11, Peter Maydell wrote:
>>> Won't it also break a guest which is just Linux loaded not via
>>> firmware which is an aarch32 kernel without LPAE support?
>>
>> Does such a thing exist? (I honestly have no clue.)
>
> Yes, it does; LPAE isn't a mandatory kernel config option.
> This is why we have the machine 'highmem' option, so that
> we can run on those kernels by not putting anything above
> the 4G boundary. Looking back at the history on that, we
> opted at the time for "default to highmem on, and if you're
> running an non-lpae kernel you need to turn it off manually".
> So we can handle those kernels by just not putting ECAM
> above 4G if highmem is false.
Actually that's what my series does. If highmem=off then we use the
legacy ECAM.
Thanks
Eric
>
> thanks
> -- PMM
>
- [Qemu-arm] [RFC 0/2] ARM virt: Support up to 256 PCIe buses, Eric Auger, 2018/05/23
- [Qemu-arm] [RFC 2/2] hw/arm/virt: Add virt-3.0 machine type, Eric Auger, 2018/05/23
- [Qemu-arm] [RFC 1/2] hw/arm/virt: Add a new 256MB ECAM region, Eric Auger, 2018/05/23
- Re: [Qemu-arm] [RFC 0/2] ARM virt: Support up to 256 PCIe buses, Laszlo Ersek, 2018/05/23
- Re: [Qemu-arm] [Qemu-devel] [RFC 0/2] ARM virt: Support up to 256 PCIe buses, Auger Eric, 2018/05/23
- Re: [Qemu-arm] [Qemu-devel] [RFC 0/2] ARM virt: Support up to 256 PCIe buses, Laszlo Ersek, 2018/05/23
- Re: [Qemu-arm] [Qemu-devel] [RFC 0/2] ARM virt: Support up to 256 PCIe buses, Auger Eric, 2018/05/23
- Re: [Qemu-arm] [Qemu-devel] [RFC 0/2] ARM virt: Support up to 256 PCIe buses, Peter Maydell, 2018/05/24
- Re: [Qemu-arm] [Qemu-devel] [RFC 0/2] ARM virt: Support up to 256 PCIe buses, Laszlo Ersek, 2018/05/24
- Re: [Qemu-arm] [Qemu-devel] [RFC 0/2] ARM virt: Support up to 256 PCIe buses, Peter Maydell, 2018/05/24
- Re: [Qemu-arm] [Qemu-devel] [RFC 0/2] ARM virt: Support up to 256 PCIe buses,
Auger Eric <=
- Re: [Qemu-arm] [Qemu-devel] [RFC 0/2] ARM virt: Support up to 256 PCIe buses, Laszlo Ersek, 2018/05/24
- Re: [Qemu-arm] [Qemu-devel] [RFC 0/2] ARM virt: Support up to 256 PCIe buses, Auger Eric, 2018/05/24
- Re: [Qemu-arm] [Qemu-devel] [RFC 0/2] ARM virt: Support up to 256 PCIe buses, Laszlo Ersek, 2018/05/24
- Re: [Qemu-arm] [Qemu-devel] [RFC 0/2] ARM virt: Support up to 256 PCIe buses, Ard Biesheuvel, 2018/05/24
- Re: [Qemu-arm] [Qemu-devel] [RFC 0/2] ARM virt: Support up to 256 PCIe buses, Laszlo Ersek, 2018/05/24
- Re: [Qemu-arm] [Qemu-devel] [RFC 0/2] ARM virt: Support up to 256 PCIe buses, Auger Eric, 2018/05/24