Re: [Xen-devel] [PATCH v5 0/10] arm: more kconfig configurability and small default configs

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

On Tue, 12 Jun 2018, Jan Beulich wrote:
> >> >> As a consequence of these changes, some options will become user-visible
> >> >> and not dependent on CONFIG_EXPERT. It does not mean that Xen Project
> >> >> will security support all possible combinations of kconfig options.
> >> >> Instead, there will be a small set of pre-canned configurations that
> >> >> will be supported.  See: 
> >> >> https://marc.info/?l=xen-devel&m=152424389512432 
> >> > 
> >> > George, Ian, Jan, shall SUPPORT.MD be updated to reflect the Kconfig 
> >> > changes?
> >> > 
> >> > I am mostly thinking about the board support and the fact that more 
> >> > options on Arm are selectable by the users.
> >> 
> >> I think that would be very desirable, yes.
> > 
> > Do you want me to add a patch for that to this series, or should I do it
> > separately?
> 
> I think such a doc change should be right in a particular patch making
> things user selectable.

I have added the following to patch #5, the one introducing all the UART
Kconfigs on ARM. I think it is the one introducing more new options. I
removed Julien's ACK because of this change. Let me know if you think we
need more details in SUPPORT.md.

diff --git a/SUPPORT.md b/SUPPORT.md
index 264b23f..e70f35c 100644
--- a/SUPPORT.md
+++ b/SUPPORT.md
@@ -16,6 +16,18 @@ for the definitions of the support status levels etc.
 
 # Feature Support
 
+## Kconfig
+
+On x86, Kconfig options that depend on CONFIG_EXPERT are not security
+supported. Other Kconfig options that do not depend on CONFIG_EXPERT are
+supported, if the related features marked as supported in this document.
+
+On ARM, a wider range of Kconfig configurations is available to enable
+very small lines of code counts in the hypervisor. Not all possible
+combinations of kconfig options are security supported. Instead, a small
+set of pre-canned configurations is supported, see xen/arch/arm/configs.
+
+
 ## Host Architecture
 
 ### x86-64

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