Re: [PATCH v7 05/27] x86/fpu/xstate: Add XSAVES system states for shadow stack
From: Peter Zijlstra <peterz@infradead.org>
Date: 2019-06-07 07:07:56
Also in:
linux-arch, linux-doc, linux-mm, lkml
On Thu, Jun 06, 2019 at 01:06:24PM -0700, Yu-cheng Yu wrote:
Intel Control-flow Enforcement Technology (CET) introduces the
following MSRs.
MSR_IA32_U_CET (user-mode CET settings),
MSR_IA32_PL3_SSP (user-mode shadow stack),
MSR_IA32_PL0_SSP (kernel-mode shadow stack),
MSR_IA32_PL1_SSP (Privilege Level 1 shadow stack),
MSR_IA32_PL2_SSP (Privilege Level 2 shadow stack).
Introduce them into XSAVES system states.
Signed-off-by: Yu-cheng Yu <redacted>
---
arch/x86/include/asm/fpu/types.h | 22 +++++++++++++++++++++
arch/x86/include/asm/fpu/xstate.h | 4 +++-
arch/x86/include/uapi/asm/processor-flags.h | 2 ++
arch/x86/kernel/fpu/xstate.c | 10 ++++++++++
4 files changed, 37 insertions(+), 1 deletion(-)And yet, no changes to msr-index.h !?