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Re: [XEN PATCH v4 04/14] x86: introduce CONFIG_ALTP2M Kconfig option
- To: Sergiy Kibrik <Sergiy_Kibrik@xxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 9 Jul 2024 09:14:46 +0200
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Xenia Ragiadakou <xenia.ragiadakou@xxxxxxx>, Tamas K Lengyel <tamas@xxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 09 Jul 2024 07:15:04 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 09.07.2024 07:52, Sergiy Kibrik wrote:
> Add new option to make altp2m code inclusion optional.
> Currently altp2m implemented for Intel EPT only, so option is dependant on
> VMX.
> Also the prompt itself depends on EXPERT=y, so that option is available
> for fine-tuning, if one want to play around with it.
>
> Use this option instead of more generic CONFIG_HVM option.
> That implies the possibility to build hvm code without altp2m support,
> hence we need to declare altp2m routines for hvm code to compile successfully
> (altp2m_vcpu_initialise(), altp2m_vcpu_destroy(), altp2m_vcpu_enable_ve())
>
> Also guard altp2m routines, so that they can be disabled completely in the
> build -- when target platform does not actually support altp2m
> (AMD-V & ARM as of now).
>
> Signed-off-by: Sergiy Kibrik <Sergiy_Kibrik@xxxxxxxx>
Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
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