x86/fred: Make exc_page_fault() work for FRED

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On a FRED system, the faulting address (CR2) is passed on the stack,
to avoid the problem of transient state.  Thus the page fault address
is read from the FRED stack frame instead of CR2 when FRED is enabled.

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/20231205105030.8698-22-xin3.li@intel.com

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H. Peter Anvin (Intel) 2023-12-05 02:50:10 -08:00 • committed by Borislav Petkov (AMD)

parent ad41a14cc2

commit 58c80cc55e

1 changed files with 4 additions and 1 deletions

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arch/x86/mm/fault.c

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