x86/fred: Update MSR_IA32_FRED_RSP0 during task switch

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MSR_IA32_FRED_RSP0 is used during ring 3 event delivery, and needs to
be updated to point to the top of next task stack during task switch.

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/20231205105030.8698-18-xin3.li@intel.com

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H. Peter Anvin (Intel) 2023-12-05 02:50:06 -08:00 • committed by Borislav Petkov (AMD)

parent 65c9cc9e2c

commit 9356c4b888

1 changed files with 6 additions and 2 deletions

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arch/x86/include/asm/switch_to.h

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