x86/ptrace: Add FRED additional information to the pt_regs structure

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FRED defines additional information in the upper 48 bits of cs/ss
fields. Therefore add the information definitions into the pt_regs
structure.

Specifically introduce a new structure fred_ss to denote the FRED flags
above SS selector, which avoids FRED_SSX_ macros and makes the code
simpler and easier to read.

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Originally-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/20231205105030.8698-15-xin3.li@intel.com

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This commit is contained in:

Xin Li 2023-12-05 02:50:03 -08:00 • committed by Borislav Petkov (AMD)

parent ee63291aa8

commit 3c77bf02d0

1 changed files with 61 additions and 5 deletions

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arch/x86/include/asm/ptrace.h

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