x86/cpu: Add X86_CR4_FRED macro

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Add X86_CR4_FRED macro for the FRED bit in %cr4. This bit must not be
changed after initialization, so add it to the pinned CR4 bits.

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/20231205105030.8698-12-xin3.li@intel.com

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

parent cd19bab825

commit ff45746fbf

2 changed files with 9 additions and 3 deletions

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7

arch/x86/include/uapi/asm/processor-flags.h

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5

arch/x86/kernel/cpu/common.c

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