linux-kernel - [PATCH v2 0/2] x86/fpu: Extend kernel_fpu_begin

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date: Tue,  7 May 2024 16:53:42 -0700
From: "Chang S. Bae" <chang.seok.bae@...el.com>
To: linux-kernel@...r.kernel.org
Cc: x86@...nel.org,
	platform-driver-x86@...r.kernel.org,
	tglx@...utronix.de,
	mingo@...hat.com,
	bp@...en8.de,
	dave.hansen@...ux.intel.com,
	hdegoede@...hat.com,
	ilpo.jarvinen@...ux.intel.com,
	tony.luck@...el.com,
	ashok.raj@...el.com,
	jithu.joseph@...el.com,
	chang.seok.bae@...el.com
Subject: [PATCH v2 0/2] x86/fpu: Extend kernel_fpu_begin_mask() for the In-Field Scan driver

Following feedback from the previous posting [1], this revision comes
with the changelog updates for more clarity:

* The recent change in the SDM alone does not fully explain the
  underlying reasons. Provide a clearer explanation rather than simply
  echoing the SDM text.

* While it is feasible for administrators to isolate CPUs running the
  In-Field Scan tests from those running AMX workloads, this approach is
  considerably disruptive and conflicts with the goal of its live
  testing. Add this point to the changelog as well.

Thanks to Dave for highlighting these aspects [2]. Additionally, it is
worth noting that the IFS Technical Paper [3] was recently published,
which may offer further context on the IFS testing.

Thanks,
Chang

[1] V1: https://lore.kernel.org/lkml/20240430212508.105117-1-chang.seok.bae@intel.com/
[2] Feedback: https://lore.kernel.org/lkml/a41d7012-2eea-436e-9f7e-6a7702f7e2c2@intel.com/
[3] IFS Paper: https://www.intel.com/content/www/us/en/content-details/822279/finding-faulty-components-in-a-live-fleet-environment.html

Chang S. Bae (2):
  x86/fpu: Extend kernel_fpu_begin_mask() to initialize AMX state
  platform/x86/intel/ifs: Initialize AMX state for the scan test

 arch/x86/include/asm/fpu/api.h           |  1 +
 arch/x86/kernel/fpu/core.c               |  3 +++
 drivers/platform/x86/intel/ifs/ifs.h     | 15 +++++++++++++++
 drivers/platform/x86/intel/ifs/runtest.c |  6 ++++++
 4 files changed, 25 insertions(+)

base-commit: 7598293ab37c92025086de4b0ecd9474013a725f
-- 
2.34.1