one process leaking into the paste of another.
This code enables use of the cp_abort instruction if a supported
processor is detected.
NOTE: this is for userspace only, not in kernel, and does not deal
with KVM guests.
Patch created with much assistance from Michael Neuling
Signed-off-by: Chris
On Tue, Apr 26, 2016 at 04:42:09PM +1000, Cyril Bur wrote:
Hi Chris,
Patch looks good. Looks like you've put 8 spaces (instead of a tab) on the
PPC_CP_ABORT line.
Argh. I'm not sure how that happened, thanks.
Apart from that,
Reviewed-by: Cyril Bur
Cheers,
-c
__
On Wed, Apr 27, 2016 at 03:25:59PM +, David Laight wrote:
From: Chris Smart
Sent: 26 April 2016 01:29
The copy paste facility introduced in POWER9 provides an optimised
mechanism for a userspace application to copy a cacheline. This is
provided by a pair of instructions, copy and paste
.
Signed-off-by: Chris Smart
---
arch/powerpc/crypto/crc-vpmsum_test.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/crypto/crc-vpmsum_test.c
b/arch/powerpc/crypto/crc-vpmsum_test.c
index 47985219a68f..dce86e75f1a8 100644
--- a/arch/powerpc/crypto/crc-vpmsum_test.c
+++ b/arch
thing to check.
Confirming that strstr calls strlen on the first argument, which would
dereference a null pointer.
Reviewed-by: Chris Smart
Signed-off-by: Suraj Jitindar Singh
---
arch/powerpc/platforms/pseries/setup.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/platforms/
The paste should never succeed and the test fails if it does.
This is a test for commit, "8a64904 powerpc: Add support for userspace
P9 copy paste."
Patch created with much assistance from Michael Neuling
Signed-off-by: Chris Smart
---
tools/testing/selftests/powerpc/Makefile
The code in machine_restart/power_off/halt() includes #ifdefs around
calls to smp_send_stop(), however these are not required as
include/linux/smp.h includes an empty version of this function for
CONFIG_SMP=n builds.
Signed-off-by: Chris Smart
---
arch/powerpc/kernel/setup-common.c | 6 --
1
pasting to a co-processor and paste_last is the synchronisation
point for preceding copy/paste sequences.
Thanks to Michael Neuling for his help.
Signed-off-by: Chris Smart
---
arch/powerpc/kernel/align.c | 15 +++
1 file changed, 15 insertions(+)
diff --git a/arch/powerpc/kernel
Test that an ISA 3.0 compliant machine performing an unaligned copy,
copy_first, paste or paste_last is sent a SIGBUS.
Signed-off-by: Chris Smart
---
tools/testing/selftests/powerpc/Makefile | 3 +-
.../testing/selftests/powerpc/alignment/.gitignore | 4 ++
tools/testing/selftests
On Thu, Jun 09, 2016 at 08:57:50AM +0200, Christophe Leroy wrote:
Le 09/06/2016 à 08:01, Chris Smart a écrit :
Calling ISA 3.0 instructions copy, copy_first, paste and paste_last
generates an alignment fault when copying or pasting unaligned
data (128 byte). We catch this and send SIGBUS to
pasting to a co-processor and paste_last is the synchronisation
point for preceding copy/paste sequences.
Thanks to Michael Neuling for his help.
Signed-off-by: Chris Smart
---
Changes since v1:
- define and use instruction for mask test
arch/powerpc/include/asm/ppc-opcode.h | 4
arch
Test that an ISA 3.0 compliant machine performing an unaligned copy,
copy_first, paste or paste_last is sent a SIGBUS.
Signed-off-by: Chris Smart
---
Changes since v1:
- check that the instruction we trapped on was the one we want
- split out tests into common code
tools/testing/selftests
On Fri, Jun 17, 2016 at 05:20:05PM +1000, Balbir Singh wrote:
On 17/06/16 09:33, Chris Smart wrote:
[snip]
+
+/*
+ * ISA 3.0 (such as P9) copy, copy_first, paste and paste_last alignment
+ * check.
+ *
+ * Send a SIGBUS to the process that caused the fault
On Thu, Jun 16, 2016 at 11:04:12PM -0500, Segher Boessenkool wrote:
On Fri, Jun 17, 2016 at 09:33:45AM +1000, Chris Smart wrote:
+#define PPC_INST_COPY 0x7c00060c
+#define PPC_INST_COPY_FIRST0x7c20060c
+#define PPC_INST_PASTE 0x7c00070c
+#define
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