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Re: [PATCH 2/2] xen: Kconfig: nest Xen guest options
- To: <boris.ostrovsky@xxxxxxxxxx>, Jason Andryuk <jandryuk@xxxxxxxxx>, "Juergen Gross" <jgross@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Thu, 15 Oct 2020 14:10:40 +0100
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- Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, <x86@xxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>, <linux-kernel@xxxxxxxxxxxxxxx>
- Delivery-date: Thu, 15 Oct 2020 13:10:59 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 15/10/2020 13:37, boris.ostrovsky@xxxxxxxxxx wrote:
> On 10/14/20 1:53 PM, Jason Andryuk wrote:
>> +config XEN_512GB
>> + bool "Limit Xen pv-domain memory to 512GB"
>> + depends on XEN_PV && X86_64
>
> Why is X86_64 needed here?
>512G support was implemented using a direct-mapped P2M, and is rather
beyond the virtual address capabilities of 32bit.
~Andrew
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