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Re: [PATCH] xen: fix randconfig build problems after introducing SYSCTL
- To: Stefano Stabellini <stefano.stabellini@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Date: Wed, 22 Oct 2025 11:03:46 +0100
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- Delivery-date: Wed, 22 Oct 2025 10:04:14 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 22/10/2025 5:39 am, Stefano Stabellini wrote:
> diff --git a/xen/arch/x86/Kconfig b/xen/arch/x86/Kconfig
> index 3f0f3a0f3a..c2689a3f1c 100644
> --- a/xen/arch/x86/Kconfig
> +++ b/xen/arch/x86/Kconfig
> @@ -144,8 +144,7 @@ config XEN_IBT
>
> config SHADOW_PAGING
> bool "Shadow Paging"
> - default !PV_SHIM_EXCLUSIVE
> - depends on PV || HVM
> + depends on (PV || HVM) && !PV_SHIM_EXCLUSIVE
> help
Committing this would need an XSA to revert it.
As stated in the help text, shadow paging is needed for the PV-L1TF
security mitigation. This includes PVShim.
The default is wrong too. I ran out of energy trying to get it fixed.
~Andrew
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