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From: Dave Hansen <dave.hansen@linux.intel.com>
To: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org,
	Dave Hansen <dave.hansen@linux.intel.com>,
	tglx@linutronix.de, linuxram@us.ibm.com, sandipan@linux.ibm.com,
	akpm@linux-foundation.org, fweimer@redhat.com,
	desnesn@linux.vnet.ibm.com, mingo@kernel.org,
	bauerman@linux.ibm.com, aneesh.kumar@linux.ibm.com,
	mpe@ellerman.id.au, mhocko@kernel.org, msuchanek@suse.de,
	shuah@kernel.org, x86@kernel.org
Subject: [PATCH 0/4] selftests/vm/pkeys: Bug fixes and a new test
Date: Fri, 11 Jun 2021 09:41:53 -0700	[thread overview]
Message-ID: <20210611164153.91B76FB8@viggo.jf.intel.com> (raw)

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@linutronix.de>
Cc: Ram Pai <linuxram@us.ibm.com>
Cc: Sandipan Das <sandipan@linux.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Florian Weimer <fweimer@redhat.com>
Cc: "Desnes A. Nunes do Rosario" <desnesn@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Michal Suchanek <msuchanek@suse.de>
Cc: Shuah Khan <shuah@kernel.org>
Cc: x86@kernel.org

WARNING: multiple messages have this Message-ID (diff)
From: Dave Hansen <dave.hansen@linux.intel.com>
To: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org,Dave Hansen
	<dave.hansen@linux.intel.com>,tglx@linutronix.de,linuxram@us.ibm.com,sandipan@linux.ibm.com,akpm@linux-foundation.org,fweimer@redhat.com,desnesn@linux.vnet.ibm.com,mingo@kernel.org,bauerman@linux.ibm.com,aneesh.kumar@linux.ibm.com,mpe@ellerman.id.au,mhocko@kernel.org,msuchanek@suse.de,shuah@kernel.org,x86@kernel.org
Subject: [PATCH 0/4] selftests/vm/pkeys: Bug fixes and a new test
Date: Fri, 11 Jun 2021 09:41:53 -0700	[thread overview]
Message-ID: <20210611164153.91B76FB8@viggo.jf.intel.com> (raw)

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@linutronix.de>
Cc: Ram Pai <linuxram@us.ibm.com>
Cc: Sandipan Das <sandipan@linux.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Florian Weimer <fweimer@redhat.com>
Cc: "Desnes A. Nunes do Rosario" <desnesn@linux.vnet.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Michal Suchanek <msuchanek@suse.de>
Cc: Shuah Khan <shuah@kernel.org>
Cc: x86@kernel.org


             reply	other threads:[~2021-06-11 16:41 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-11 16:41 Dave Hansen [this message]
2021-06-11 16:41 ` [PATCH 0/4] selftests/vm/pkeys: Bug fixes and a new test Dave Hansen
2021-06-11 16:41 ` [PATCH 1/4] selftests/vm/pkeys: Fix alloc_random_pkey() to make it really, really random Dave Hansen
2021-06-11 16:41   ` Dave Hansen
2021-06-11 16:41 ` [PATCH 2/4] selftests/vm/pkeys: Handle negative sys_pkey_alloc() return code Dave Hansen
2021-06-11 16:41   ` Dave Hansen
2021-06-11 16:42 ` [PATCH 3/4] selftests/vm/pkeys: Refill shadow register after implicit kernel write Dave Hansen
2021-06-11 16:42   ` Dave Hansen
2021-06-11 16:42 ` [PATCH 4/4] selftests/vm/pkeys: Exercise x86 XSAVE init state Dave Hansen
2021-06-11 16:42   ` Dave Hansen
2021-06-13  8:54 ` [PATCH 0/4] selftests/vm/pkeys: Bug fixes and a new test Aneesh Kumar K.V

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