Re: [PATCH v8 7/7] x86/sev: Add debugfs support for RMPOPT

[Borislav Petkov]

On Mon, Jun 15, 2026 at 07:50:56PM +0000, Ashish Kalra wrote:
> From: Ashish Kalra <ashish.kalra@xxxxxxx>
> 
> Add a debugfs interface to report per-CPU RMPOPT status across all
> system RAM.
> 
> To dump the per-CPU RMPOPT status for all system RAM:
> 
> /sys/kernel/debug/rmpopt# cat rmpopt-table
> 
> Memory @  0GB: CPU(s): none
> Memory @  1GB: CPU(s): none
> Memory @  2GB: CPU(s): 0-1023
> Memory @  3GB: CPU(s): 0-1023
> Memory @  4GB: CPU(s): none
> Memory @  5GB: CPU(s): 0-1023
> Memory @  6GB: CPU(s): 0-1023
> Memory @  7GB: CPU(s): 0-1023
> ...
> Memory @1025GB: CPU(s): 0-1023
> Memory @1026GB: CPU(s): 0-1023
> Memory @1027GB: CPU(s): 0-1023
> Memory @1028GB: CPU(s): 0-1023
> Memory @1029GB: CPU(s): 0-1023
> Memory @1030GB: CPU(s): 0-1023
> Memory @1031GB: CPU(s): 0-1023
> Memory @1032GB: CPU(s): 0-1023
> Memory @1033GB: CPU(s): 0-1023
> Memory @1034GB: CPU(s): 0-1023
> Memory @1035GB: CPU(s): 0-1023
> Memory @1036GB: CPU(s): 0-1023
> Memory @1037GB: CPU(s): 0-1023
> Memory @1038GB: CPU(s): none
> 
> Suggested-by: Thomas Lendacky <thomas.lendacky@xxxxxxx>
> Signed-off-by: Ashish Kalra <ashish.kalra@xxxxxxx>
> ---
>  arch/x86/virt/svm/sev.c | 128 ++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 128 insertions(+)

https://lwn.net/Articles/309298/

-- 
Regards/Gruss,
    Boris.

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