Re: [PATCH v7 0/8] x86/kexec: Add exception handling for relocate_kernel

[David Woodhouse]

On Fri, 2025-03-14 at 11:21 +0100, Ingo Molnar wrote:
> 
> I've applied patch #1 back to tip:x86/boot.
> 
> I've skipped the -v7 versions of patch #2 and #3 because AFAICS you've 
> changed exc_handler already, so a backmerge of this annotation fix 
> wouldn't be enough.

I haven't (yet) changed exc_handler, but I did post that annotation fix
as a patch against patch 3 in the series, when actually it should be
applied as as fixup to patch 2.

I *am* cleaning up exc_handler in patch 3 though, for a more 'warm and
fuzzy' experience on int3 rather than dumping the full register set. So
I'll repost it from patch 2 against the new tip/x86/boot, including the
annotation fix in the right place.

Thanks.

I haven't yet decided what to do about the unconditional int3. Slightly
tempted to suggest we put it in #ifdef CONFIG_DEBUG_ENTRY now I've been
reminded that option exists? But we should *also* be doing better
testing of kexec-jump, with something like that test case I posted, and
adding an int3 into that would be trivial too.

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