Re: [RFC PATCH 5/5] x86/entry: Store CPU info on exception entry

[Rik van Riel]

On Fri, 2022-08-05 at 10:30 -0700, ira.weiny@xxxxxxxxx wrote:
> From: Ira Weiny <ira.weiny@xxxxxxxxx>
> 
> The CPU information of an exception is useful in determining where
> bad
> CPUs are in a large data center.
> 
> Define arch_{save|restore}_auxiliary_pt_regs() and set
> ARCH_HAS_PTREGS_AUXILIARY default to yes.
> 
> Store the CPU on exception entry and use it later.
> 
> Cc: Rik van Riel <riel@xxxxxxxxxxx>
> Suggested-by: Borislav Petkov <bp@xxxxxxxxx>
> Suggested-by: Dave Hansen <dave.hansen@xxxxxxxxx>
> Signed-off-by: Ira Weiny <ira.weiny@xxxxxxxxx>

Acked-by: Rik van Riel <riel@xxxxxxxxxxx>

-- 
All Rights Reversed.

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