x86/fred: Add a NMI entry stub for FRED

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On a FRED system, NMIs nest both with themselves and faults, transient
information is saved into the stack frame, and NMI unblocking only
happens when the stack frame indicates that so should happen.

Thus, the NMI entry stub for FRED is really quite small...

Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Signed-off-by: Xin Li <xin3.li@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Tested-by: Shan Kang <shan.kang@intel.com>
Link: https://lore.kernel.org/r/20231216063139.25567-1-xin3.li@intel.com

...

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H. Peter Anvin (Intel) 2023-12-15 22:31:39 -08:00 • committed by Borislav Petkov (AMD)

parent 99fcc968e7

commit f8b8ee45f8

1 changed files with 42 additions and 0 deletions

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arch/x86/kernel/nmi.c

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