Re: [Xen-devel] [PATCH] x86/boot: Clean up the trampoline transition into Long mode

[Wei Liu <wl@xxxxxxx>]

On Thu, Jan 02, 2020 at 02:59:53PM +0000, Andrew Cooper wrote:
> The jmp after setting %cr0 is redundant with the following ljmp.
> 
> The CPUID to protect the jump to higher mappings was inserted due to an
> abundance of caution/paranoia before Spectre was public.  There is not a
> matching protection in the S3 resume path, and there is nothing
> interesting in memory at this point.

What do you mean by "there is nothing interesting in memory" here?

As far as I can tell idel page table has been loaded.  During AP
bring-up it contains runtime data, no?

Wei.

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