From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: Shuah Khan <shuah@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
Boqun Feng <boqun.feng@gmail.com>,
Andy Lutomirski <luto@amacapital.net>,
Dave Watson <davejwatson@fb.com>, Paul Turner <pjt@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Russell King <linux@arm.linux.org.uk>,
Ingo Molnar <mingo@redhat.com>, "H . Peter Anvin" <hpa@zytor.com>,
Andi Kleen <andi@firstfloor.org>, Chris Lameter <cl@linux.com>,
Ben Maurer <bmaurer@fb.com>, Steven Rostedt <rostedt@goodmis.org>,
Josh Triplett <josh@joshtriplett.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Michael Kerrisk <mtk.manpages@gmail.com>,
Joel Fernandes <joelaf@google.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Alan Modra <amodra@gmail.com>,
linuxppc-dev@lists.ozlabs.org
Subject: [PATCH for 5.2 10/12] rseq/selftests: powerpc code signature: generate valid instructions
Date: Mon, 29 Apr 2019 11:28:01 -0400 [thread overview]
Message-ID: <20190429152803.7719-11-mathieu.desnoyers@efficios.com> (raw)
In-Reply-To: <20190429152803.7719-1-mathieu.desnoyers@efficios.com>
Use "twui" as the guard instruction for the restartable sequence abort
handler.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
CC: Michael Ellerman <mpe@ellerman.id.au>
CC: Boqun Feng <boqun.feng@gmail.com>
CC: Peter Zijlstra <peterz@infradead.org>
CC: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
CC: Alan Modra <amodra@gmail.com>
CC: linuxppc-dev@lists.ozlabs.org
---
tools/testing/selftests/rseq/rseq-ppc.h | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/rseq/rseq-ppc.h b/tools/testing/selftests/rseq/rseq-ppc.h
index 9df18487fa9f..76be90196fe4 100644
--- a/tools/testing/selftests/rseq/rseq-ppc.h
+++ b/tools/testing/selftests/rseq/rseq-ppc.h
@@ -6,7 +6,15 @@
* (C) Copyright 2016-2018 - Boqun Feng <boqun.feng@gmail.com>
*/
-#define RSEQ_SIG 0x53053053
+/*
+ * RSEQ_SIG is used with the following trap instruction:
+ *
+ * powerpc-be: 0f e5 00 0b twui r5,11
+ * powerpc64-le: 0b 00 e5 0f twui r5,11
+ * powerpc64-be: 0f e5 00 0b twui r5,11
+ */
+
+#define RSEQ_SIG 0x0fe5000b
#define rseq_smp_mb() __asm__ __volatile__ ("sync" ::: "memory", "cc")
#define rseq_smp_lwsync() __asm__ __volatile__ ("lwsync" ::: "memory", "cc")
--
2.11.0
WARNING: multiple messages have this Message-ID (diff)
From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: Shuah Khan <shuah@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux-api@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
Peter Zijlstra <peterz@infradead.org>,
"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
Boqun Feng <boqun.feng@gmail.com>,
Andy Lutomirski <luto@amacapital.net>,
Dave Watson <davejwatson@fb.com>, Paul Turner <pjt@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
Russell King <linux@arm.linux.org.uk>,
Ingo Molnar <mingo@redhat.com>, "H . Peter Anvin" <hpa@zytor.com>,
Andi Kleen <andi@firstfloor.org>, Chris Lameter <cl@linux.com>,
Ben Maurer <bmaurer@fb.com>, Steven Rostedt <rostedt@goodmis.org>,
Josh Triplett <josh@joshtriplett.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm>
Subject: [PATCH for 5.2 10/12] rseq/selftests: powerpc code signature: generate valid instructions
Date: Mon, 29 Apr 2019 11:28:01 -0400 [thread overview]
Message-ID: <20190429152803.7719-11-mathieu.desnoyers@efficios.com> (raw)
In-Reply-To: <20190429152803.7719-1-mathieu.desnoyers@efficios.com>
Use "twui" as the guard instruction for the restartable sequence abort
handler.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
CC: Michael Ellerman <mpe@ellerman.id.au>
CC: Boqun Feng <boqun.feng@gmail.com>
CC: Peter Zijlstra <peterz@infradead.org>
CC: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
CC: Alan Modra <amodra@gmail.com>
CC: linuxppc-dev@lists.ozlabs.org
---
tools/testing/selftests/rseq/rseq-ppc.h | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/rseq/rseq-ppc.h b/tools/testing/selftests/rseq/rseq-ppc.h
index 9df18487fa9f..76be90196fe4 100644
--- a/tools/testing/selftests/rseq/rseq-ppc.h
+++ b/tools/testing/selftests/rseq/rseq-ppc.h
@@ -6,7 +6,15 @@
* (C) Copyright 2016-2018 - Boqun Feng <boqun.feng@gmail.com>
*/
-#define RSEQ_SIG 0x53053053
+/*
+ * RSEQ_SIG is used with the following trap instruction:
+ *
+ * powerpc-be: 0f e5 00 0b twui r5,11
+ * powerpc64-le: 0b 00 e5 0f twui r5,11
+ * powerpc64-be: 0f e5 00 0b twui r5,11
+ */
+
+#define RSEQ_SIG 0x0fe5000b
#define rseq_smp_mb() __asm__ __volatile__ ("sync" ::: "memory", "cc")
#define rseq_smp_lwsync() __asm__ __volatile__ ("lwsync" ::: "memory", "cc")
--
2.11.0
WARNING: multiple messages have this Message-ID (diff)
From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
To: Shuah Khan <shuah@kernel.org>
Cc: Joel Fernandes <joelaf@google.com>,
Peter Zijlstra <peterz@infradead.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Dave Watson <davejwatson@fb.com>,
Will Deacon <will.deacon@arm.com>,
Andi Kleen <andi@firstfloor.org>,
Paul Mackerras <paulus@samba.org>,
"H . Peter Anvin" <hpa@zytor.com>, Chris Lameter <cl@linux.com>,
Russell King <linux@arm.linux.org.uk>,
Ingo Molnar <mingo@redhat.com>,
Michael Kerrisk <mtk.manpages@gmail.com>,
"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
Paul Turner <pjt@google.com>, Alan Modra <amodra@gmail.com>,
Boqun Feng <boqun.feng@gmail.com>,
Josh Triplett <josh@joshtriplett.org>,
Steven Rostedt <rostedt@goodmis.org>, Ben Maurer <bmaurer@fb.com>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Thomas Gleixner <tglx@linutronix.de>,
linux-api@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-kernel@vger.kernel.org,
Andy Lutomirski <luto@amacapital.net>,
Andrew Morton <akpm@linux-foundation.org>,
Linus Torvalds <torvalds@linux-foundation.org>
Subject: [PATCH for 5.2 10/12] rseq/selftests: powerpc code signature: generate valid instructions
Date: Mon, 29 Apr 2019 11:28:01 -0400 [thread overview]
Message-ID: <20190429152803.7719-11-mathieu.desnoyers@efficios.com> (raw)
In-Reply-To: <20190429152803.7719-1-mathieu.desnoyers@efficios.com>
Use "twui" as the guard instruction for the restartable sequence abort
handler.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Paul Mackerras <paulus@samba.org>
CC: Michael Ellerman <mpe@ellerman.id.au>
CC: Boqun Feng <boqun.feng@gmail.com>
CC: Peter Zijlstra <peterz@infradead.org>
CC: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
CC: Alan Modra <amodra@gmail.com>
CC: linuxppc-dev@lists.ozlabs.org
---
tools/testing/selftests/rseq/rseq-ppc.h | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/rseq/rseq-ppc.h b/tools/testing/selftests/rseq/rseq-ppc.h
index 9df18487fa9f..76be90196fe4 100644
--- a/tools/testing/selftests/rseq/rseq-ppc.h
+++ b/tools/testing/selftests/rseq/rseq-ppc.h
@@ -6,7 +6,15 @@
* (C) Copyright 2016-2018 - Boqun Feng <boqun.feng@gmail.com>
*/
-#define RSEQ_SIG 0x53053053
+/*
+ * RSEQ_SIG is used with the following trap instruction:
+ *
+ * powerpc-be: 0f e5 00 0b twui r5,11
+ * powerpc64-le: 0b 00 e5 0f twui r5,11
+ * powerpc64-be: 0f e5 00 0b twui r5,11
+ */
+
+#define RSEQ_SIG 0x0fe5000b
#define rseq_smp_mb() __asm__ __volatile__ ("sync" ::: "memory", "cc")
#define rseq_smp_lwsync() __asm__ __volatile__ ("lwsync" ::: "memory", "cc")
--
2.11.0
next prev parent reply other threads:[~2019-04-29 15:29 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-29 15:27 [PATCH for 5.2 00/12] Restartable Sequences selftests updates Mathieu Desnoyers
2019-04-29 15:27 ` Mathieu Desnoyers
2019-04-29 15:27 ` [PATCH for 5.2 01/12] rseq/selftests: x86: Work-around bogus gcc-8 optimisation Mathieu Desnoyers
2019-04-29 15:27 ` Mathieu Desnoyers
2019-04-29 15:27 ` Mathieu Desnoyers
2019-04-29 15:27 ` mathieu.desnoyers
2019-04-29 15:27 ` [PATCH for 5.2 02/12] rseq/selftests: Add __rseq_exit_point_array section for debuggers Mathieu Desnoyers
2019-04-29 15:27 ` Mathieu Desnoyers
2019-04-29 15:27 ` Mathieu Desnoyers
2019-04-29 15:27 ` mathieu.desnoyers
2019-04-29 15:27 ` [PATCH for 5.2 03/12] rseq/selftests: Introduce __rseq_cs_ptr_array, rename __rseq_table to __rseq_cs Mathieu Desnoyers
2019-04-29 15:27 ` Mathieu Desnoyers
2019-04-29 15:27 ` Mathieu Desnoyers
2019-04-29 15:27 ` mathieu.desnoyers
2019-04-29 15:27 ` [PATCH for 5.2 04/12] rseq/selftests: Use __rseq_handled symbol to coexist with glibc Mathieu Desnoyers
2019-04-29 15:27 ` Mathieu Desnoyers
2019-04-29 15:27 ` [PATCH for 5.2 05/12] rseq/selftests: s390: use jg instruction for jumps outside of the asm Mathieu Desnoyers
2019-04-29 15:27 ` Mathieu Desnoyers
2019-04-29 15:27 ` Mathieu Desnoyers
2019-04-29 15:27 ` mathieu.desnoyers
2019-04-29 15:27 ` [PATCH for 5.2 06/12] rseq/selftests: x86: use ud1 instruction as RSEQ_SIG opcode Mathieu Desnoyers
2019-04-29 15:27 ` Mathieu Desnoyers
2019-04-29 15:27 ` Mathieu Desnoyers
2019-04-29 15:27 ` mathieu.desnoyers
2019-04-29 15:27 ` [PATCH for 5.2 07/12] rseq/selftests: s390: use trap4 for RSEQ_SIG Mathieu Desnoyers
2019-04-29 15:27 ` Mathieu Desnoyers
2019-05-16 20:39 ` shuah
2019-05-16 20:39 ` shuah
2019-05-16 20:49 ` Mathieu Desnoyers
2019-05-16 20:49 ` Mathieu Desnoyers
2019-04-29 15:27 ` [PATCH for 5.2 08/12] rseq/selftests: arm: use udf instruction " Mathieu Desnoyers
2019-04-29 15:27 ` Mathieu Desnoyers
2019-04-29 15:27 ` Mathieu Desnoyers
2019-04-29 15:27 ` mathieu.desnoyers
2019-05-03 19:38 ` [PATCH v2 " Mathieu Desnoyers
2019-05-03 19:38 ` Mathieu Desnoyers
2019-05-03 19:38 ` Mathieu Desnoyers
2019-05-03 19:38 ` mathieu.desnoyers
2019-06-06 18:02 ` Mathieu Desnoyers
2019-06-06 18:02 ` Mathieu Desnoyers
2019-06-06 18:02 ` Mathieu Desnoyers
2019-06-06 18:02 ` Mathieu Desnoyers
2019-06-06 18:02 ` mathieu.desnoyers
2019-06-08 15:52 ` Mathieu Desnoyers
2019-06-08 15:52 ` Mathieu Desnoyers
2019-06-08 15:52 ` Mathieu Desnoyers
2019-06-08 15:52 ` Mathieu Desnoyers
2019-06-08 15:52 ` mathieu.desnoyers
2019-04-29 15:28 ` [PATCH for 5.2 09/12] rseq/selftests: aarch64 code signature: handle big-endian environment Mathieu Desnoyers
2019-04-29 15:28 ` Mathieu Desnoyers
2019-04-29 15:28 ` Mathieu Desnoyers
2019-04-29 15:28 ` mathieu.desnoyers
2019-04-29 15:28 ` Mathieu Desnoyers [this message]
2019-04-29 15:28 ` [PATCH for 5.2 10/12] rseq/selftests: powerpc code signature: generate valid instructions Mathieu Desnoyers
2019-04-29 15:28 ` Mathieu Desnoyers
2019-04-29 15:28 ` [PATCH for 5.2 11/12] rseq/selftests: mips: use break instruction for RSEQ_SIG Mathieu Desnoyers
2019-04-29 15:28 ` Mathieu Desnoyers
2019-04-29 15:28 ` [PATCH for 5.2 12/12] rseq/selftests: add -no-integrated-as for clang Mathieu Desnoyers
2019-04-29 15:28 ` Mathieu Desnoyers
2019-04-29 15:28 ` Mathieu Desnoyers
2019-04-29 15:28 ` mathieu.desnoyers
2019-04-29 17:03 ` Nick Desaulniers
2019-04-29 17:03 ` Nick Desaulniers
2019-04-29 17:03 ` Nick Desaulniers
2019-04-29 17:03 ` ndesaulniers
2019-04-29 20:28 ` Mathieu Desnoyers
2019-04-29 20:28 ` Mathieu Desnoyers
2019-04-29 20:28 ` Mathieu Desnoyers
2019-04-29 20:28 ` mathieu.desnoyers
2019-04-29 20:30 ` Nick Desaulniers
2019-04-29 20:30 ` Nick Desaulniers
2019-04-29 20:30 ` Nick Desaulniers
2019-04-29 20:30 ` ndesaulniers
2019-05-03 18:36 ` [PATCH for 5.2 00/12] Restartable Sequences selftests updates Mathieu Desnoyers
2019-05-03 18:36 ` Mathieu Desnoyers
2019-05-03 18:53 ` shuah
2019-05-03 18:53 ` shuah
2019-05-03 19:22 ` Mathieu Desnoyers
2019-05-03 19:22 ` Mathieu Desnoyers
2019-05-03 21:46 ` Joe Perches
2019-05-03 21:46 ` Joe Perches
2019-05-03 22:59 ` shuah
2019-05-03 22:59 ` shuah
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