linux-kernel - [PATCH v3 0/3] x86/fpu: Make AMX state ready for CPU idle

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Message-Id: <20220325022219.829-1-chang.seok.bae@intel.com>
Date:   Thu, 24 Mar 2022 19:22:16 -0700
From:   "Chang S. Bae" <chang.seok.bae@...el.com>
To:     linux-kernel@...r.kernel.org, x86@...nel.org,
        linux-pm@...r.kernel.org
Cc:     tglx@...utronix.de, dave.hansen@...ux.intel.com,
        peterz@...radead.org, bp@...en8.de, rafael@...nel.org,
        ravi.v.shankar@...el.com, chang.seok.bae@...el.com
Subject: [PATCH v3 0/3] x86/fpu: Make AMX state ready for CPU idle

Changes from v2 [1]:
* Secure XCR0 accessors from the compiler reordering issue (Dave Hansen).
* Check the feature flag instead of fpu_state_size_dynamic() (Dave Hansen).
* Remove the meaningless backslash (Rafael Wysocki).

Note the two changes this series wants are now in the mainline:
* the opcode for TILERELEASE [2] and
* the C-state table for Sapphire Rapids [3]

The series on top of the above is available here:
  git://github.com/intel/amx-linux.git tilerelease

Thanks,
Chang

[1]: https://lore.kernel.org/lkml/20220309223431.26560-1-chang.seok.bae@intel.com/
[2]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/arch?id=9dd94df75b30eca03ed2151dd5bbc152a6f19abf
[3]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/arch?id=9edf3c0ffef0ec1bed8300315852b5c6a0997130

Chang S. Bae (3):
  x86/fpu: Make XCR0 accessors immune to unwanted compiler reordering
  x86/fpu: Add a helper to prepare AMX state for low-power CPU idle
  intel_idle: Add a new flag to initialize the AMX state

 arch/x86/include/asm/fpu/api.h       |  2 ++
 arch/x86/include/asm/fpu/xcr.h       |  8 ++++++--
 arch/x86/include/asm/special_insns.h |  9 +++++++++
 arch/x86/kernel/fpu/core.c           | 13 +++++++++++++
 drivers/idle/intel_idle.c            | 18 ++++++++++++++++--
 5 files changed, 46 insertions(+), 4 deletions(-)

-- 
2.17.1