linux-kernel - [PATCH 0/4] selftests/vm/pkeys: Bug fixes and a new test

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Date:   Fri, 11 Jun 2021 09:41:53 -0700
From:   Dave Hansen <dave.hansen@...ux.intel.com>
To:     linux-mm@...ck.org
Cc:     linux-kernel@...r.kernel.org,
        Dave Hansen <dave.hansen@...ux.intel.com>, tglx@...utronix.de,
        linuxram@...ibm.com, sandipan@...ux.ibm.com,
        akpm@...ux-foundation.org, fweimer@...hat.com,
        desnesn@...ux.vnet.ibm.com, mingo@...nel.org,
        bauerman@...ux.ibm.com, aneesh.kumar@...ux.ibm.com,
        mpe@...erman.id.au, mhocko@...nel.org, msuchanek@...e.de,
        shuah@...nel.org, x86@...nel.org
Subject: [PATCH 0/4] selftests/vm/pkeys: Bug fixes and a new test

There has been a lot of activity on the x86 front around the XSAVE
architecture which is used to context-switch processor state (among
other things).  In addition, AMD has recently joined the protection
keys club by adding processor support for PKU.

The AMD implementation helped uncover a kernel bug around the PKRU
"init state", which actually applied to Intel's implementation but
was just harder to hit.  This series adds a test which is expected
to help find this class of bug both on AMD and Intel.  All the work
around pkeys on x86 also uncovered a few bugs in the selftest.

Any testing of this new code (especially from my powerpc friends)
would be appreciated.

Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ram Pai <linuxram@...ibm.com>
Cc: Sandipan Das <sandipan@...ux.ibm.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Florian Weimer <fweimer@...hat.com>
Cc: "Desnes A. Nunes do Rosario" <desnesn@...ux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@...nel.org>
Cc: Thiago Jung Bauermann <bauerman@...ux.ibm.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@...ux.ibm.com>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Michal Hocko <mhocko@...nel.org>
Cc: Michal Suchanek <msuchanek@...e.de>
Cc: Shuah Khan <shuah@...nel.org>
Cc: x86@...nel.org