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

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[ Upstream commit 3c77bf02d0 ]

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
Stable-dep-of: dc81e556f2 ("x86/fred: Clear WFE in missing-ENDBRANCH #CPs")
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Xin Li 2023-12-05 02:50:03 -08:00 • committed by Greg Kroah-Hartman

parent 498bdedca5

commit 9c268be377

1 changed files with 61 additions and 5 deletions

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arch/x86/include/asm/ptrace.h

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