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Re: [Xen-devel] [PATCH v8 1/7] xen/pvh: Split CONFIG_XEN_PVH into CONFIG_PVH and CONFIG_XEN_PVH
- To: Juergen Gross <jgross@xxxxxxxx>, Maran Wilson <maran.wilson@xxxxxxxxxx>, x86@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx
- From: Paolo Bonzini <pbonzini@xxxxxxxxxx>
- Date: Fri, 7 Dec 2018 14:41:46 +0100
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- Cc: thomas.lendacky@xxxxxxx, dave.hansen@xxxxxxxxxxxxxxx, rkrcmar@xxxxxxxxxx, hpa@xxxxxxxxx, mingo@xxxxxxxxxx, rdunlap@xxxxxxxxxxxxx, luto@xxxxxxxxxx, jpoimboe@xxxxxxxxxx, tglx@xxxxxxxxxxxxx, bp@xxxxxxx, boris.ostrovsky@xxxxxxxxxx, kirill.shutemov@xxxxxxxxxxxxxxx, roger.pau@xxxxxxxxxx
- Delivery-date: Fri, 07 Dec 2018 13:41:58 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Openpgp: preference=signencrypt
On 07/12/18 07:02, Juergen Gross wrote:
> On 06/12/2018 23:11, Paolo Bonzini wrote:
>> On 06/12/18 07:04, Maran Wilson wrote:
>>> +config PVH
>>> + bool "Support for running PVH guests"
>>> + ---help---
>>> + This option enables the PVH entry point for guest virtual machines
>>> + as specified in the x86/HVM direct boot ABI.
>>> +
>>
>> IIUC this breaks "normal" bzImage boot, so we should have something like
>>
>> The resulting kernel will not boot with most x86 boot loaders
>> such as GRUB or SYSLINUX. Unless you plan to start the kernel
>> using QEMU or Xen, you probably want to say N here.
>
> The resulting kernel should be able to be booted either in PVH mode
> via the PVH entry point or the "normal" way via the still existing
> old entry point(s).
>
> It is an _additional_ way to boot the kernel, not an exclusive
> alternative.
Yup, understood now. Different binaries but one build.
Paolo
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