ot accessible
> from real mode though.
>
> So to keep calling the function, let's turn on MSR_DR while we call it.
> That way, all pointer references to the stack are handled virtually.
>
> Reported-by: Matt Evans
> Fixes: 863771a28e27 ("powerpc/32s: Convert switch_mm
Hi Michael,
> On 28 Mar 2018, at 11:36, Matt Evans wrote:
>
> Howdy Michael,
>
>> On 28 Mar 2018, at 06:54, Michael Ellerman wrote:
>>
>> Matt Evans writes:
>>
>>> When using SIG_DBG_BRANCH_TRACING, MSR.BE is left enabled in the
>>>
Howdy Michael,
> On 28 Mar 2018, at 06:54, Michael Ellerman wrote:
>
> Matt Evans writes:
>
>> When using SIG_DBG_BRANCH_TRACING, MSR.BE is left enabled in the
>> user context when single_step_exception() prepares the SIGTRAP
>> delivery. The resulting branch-t
ned-off-by: Matt Evans
---
arch/powerpc/kernel/traps.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 1e48d157196a..5eaab234e747 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -46
Hi Vladimir,
On 21 Sep 2013, at 17:25, Vladimir Murzin wrote:
> commit b6069a9570 (filter: add MOD operation) added generic
> support for modulus operation in BPF.
>
> This patch brings JIT support for PPC64
>
> Signed-off-by: Vladimir Murzin
> Acked-by: Matt Evans
Not
(r_scratch1 + 1)
>>> + PPC_LI32(r_scratch2, K);
>>> + PPC_DIVWU(r_scratch1, r_A, r_scratch2);
>>> + PPC_MUL(r_scratch1, r_scratch2, r_scratch1);
>>>
>
> This looks like it's in only used in the BPF JIT code.
>
> Matt, any chance you an ACK/NACK this?
Sure, that looks sensible, thanks Vladimir.
Acked-by: Matt Evans
>
> Mikey
>
>>
>> Signed-off-by: Vladimir Murzin
>> ---
>> a
t,
if defined, int-ll64.h is included instead.
Signed-off-by: Matt Evans
---
arch/powerpc/include/asm/types.h |5 -
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/include/asm/types.h b/arch/powerpc/include/asm/types.h
index 8947b98..d82e94e 100644
--- a
ame way as x86-64:
echo 1 > /proc/sys/net/core/bpf_jit_enable
Or, enabled with extra debug output:
echo 2 > /proc/sys/net/core/bpf_jit_enable
Signed-off-by: Matt Evans
---
V3: Added BUILD_BUG_ON to assert PACA CPU ID is 16bits, made a comment (in
LD_MSH) a bit clearer
On 19/07/11 17:17, Kumar Gala wrote:
>
> On Jul 19, 2011, at 2:06 AM, Matt Evans wrote:
>
>> On 19/07/11 16:59, Kumar Gala wrote:
>>>
>>> On Jul 18, 2011, at 9:13 PM, Matt Evans wrote:
>>>
>>>> [snip]
>>>>
>>>> V2: Re
On 19/07/11 16:59, Kumar Gala wrote:
>
> On Jul 18, 2011, at 9:13 PM, Matt Evans wrote:
>
>> An implementation of a code generator for BPF programs to speed up packet
>> filtering on PPC64, inspired by Eric Dumazet's x86-64 version.
>>
>> Filter code is gen
ame way as x86-64:
echo 1 > /proc/sys/net/core/bpf_jit_enable
Or, enabled with extra debug output:
echo 2 > /proc/sys/net/core/bpf_jit_enable
Signed-off-by: Matt Evans
---
V2: Removed some cut/paste woe in setting SEEN_X even on writes.
Merci for le review, Eric!
arch
On 19/07/11 05:42, David Miller wrote:
> From: Eric Dumazet
> Date: Mon, 18 Jul 2011 10:39:35 +0200
>
>> So in PPC SEEN_XREG only is to be set of X is read, not if written.
>>
>> So you dont have to set SEEN_XREG bit in this part :
>
> Matt, do you want to integrate changes based upon Eric's fee
ame way as x86-64:
echo 1 > /proc/sys/net/core/bpf_jit_enable
Or, enabled with extra debug output:
echo 2 > /proc/sys/net/core/bpf_jit_enable
Signed-off-by: Matt Evans
---
Since the RFC post, this has incorporated the bugfixes/tidies from review plus a
couple more found in fu
Hi Eric,
On 25/06/11 17:49, Eric Dumazet wrote:
> Le samedi 25 juin 2011 à 09:33 +0200, Andreas Schwab a écrit :
>> Matt Evans writes:
>>
>>> + stdur1, -128(r1); \
>>
>>> + addir5, r1, 128+BPF_PPC_STACK_BASIC+
On 25/06/11 17:33, Andreas Schwab wrote:
> Matt Evans writes:
>
>> +stdur1, -128(r1); \
>
>> +addir5, r1, 128+BPF_PPC_STACK_BASIC+(2*8); \
>
>
On 25/06/11 11:58, Ben Hutchings wrote:
> On Fri, 2011-06-24 at 16:02 +1000, Matt Evans wrote:
> [...]
>> +case BPF_S_ALU_ADD_K: /* A += K; */
>> +if (!K)
>> +break;
>> +
+obj-$(CONFIG_BPF_JIT) += bpf_jit.o bpf_jit_comp.o
diff --git a/arch/powerpc/net/bpf_jit.S b/arch/powerpc/net/bpf_jit.S
new file mode 100644
index 000..ce2225e
--- /dev/null
+++ b/arch/powerpc/net/bpf_jit.S
@@ -0,0 +1,138 @@
+/* bpf_jit.S: Packet/header access helper functions
+ * for PPC64 BPF compi
Hi,
Inspired by Eric Dumazet's x86-64 compiler for Berkeley Packet Filter programs,
I've written a BPF compiler for 64-bit PowerPC. Although it hasn't finished its
strenuous testing regime, I'll have intermittent net access for a couple of
weeks so thought I'd post it for feedback now and submit
smp_release_cpus() waits for all cpus (including the bootcpu) due to an
off-by-one count on boot_cpu_count (which is all CPUs). This patch replaces
that with spinning_secondaries (which is all secondary CPUs).
Signed-off-by: Matt Evans
---
arch/powerpc/include/asm/smp.h |2 +-
arch/powerpc
On 07/04/11 17:06, Kumar Gala wrote:
>
> On Apr 7, 2011, at 12:48 AM, Matt Evans wrote:
>
>> diff --git a/arch/powerpc/include/asm/cputable.h
>> b/arch/powerpc/include/asm/cputable.h
>> index be3cdf9..7b0fe7c 100644
>> --- a/arch/powerpc/include/asm/cputable.h
Some of the 64bit PPC CPU features are MMU-related, so this patch moves
them to MMU_FTR_ bits. All cpu_has_feature()-style tests are moved to
mmu_has_feature(), and seven feature bits are freed as a result.
Signed-off-by: Matt Evans
---
Boot-tested on pseries and G5.
arch/powerpc/include/asm
On 30/03/11 07:00, Dmitry Torokhov wrote:
> On Sunday, March 27, 2011 09:53:00 pm Matt Evans wrote:
>> @@ -2282,7 +2284,7 @@ hw_died:
>> /* FIXME this should be a delayed service routine
>> * that clears the EHB.
>> */
>> -xhci_
Make the caller loop while there are events to handle, instead.
Signed-off-by: Matt Evans
---
Added a comment on the return value, defining <0 to be 'bad'.
drivers/usb/host/xhci-ring.c | 18 +++---
1 files changed, 11 insertions(+), 7 deletions(-)
diff --git a/dri
During a "plug-unplug" stress test on an NEC xHCI card, a null pointer
dereference was observed. xhci_address_device() dereferenced a null
virt_dev (possibly an erroneous udev->slot_id?); this patch adds a WARN_ON &
message to aid debug if it can be recreated.
Signed-o
On weakly-ordered systems, the reading of an event's content must occur
after reading the event's validity.
Signed-off-by: Matt Evans
---
drivers/usb/host/xhci-ring.c |5 +
1 files changed, 5 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/host/xhci-ring.c b/driver
Hi Sarah,
Reposting the whole set, since there're 4 instead of 5 having dropped the 'add
debug' patch in the middle and I thought differing 'vN a/b' subjects may get
confusing otherwise. (Two of the patches haven't changed. :/ )
These remove the scratty temp variables and comment the return val
Hi,
On 29/03/11 09:19, Sarah Sharp wrote:
> On Fri, Mar 25, 2011 at 06:43:59PM +1100, Matt Evans wrote:
>> Add more debug to print queued transfers, show control intentions and
>> modify an existing message to hexify address output.
>
> Are these new debug messages really ne
On 29/03/11 09:16, Sarah Sharp wrote:
> On Fri, Mar 25, 2011 at 06:43:44PM +1100, Matt Evans wrote:
>> Hi Sarah,
>>
>>
>> This series addresses the endian issues with the xHCI driver, and has brought
>> lovely USB 3 to PPC. :-) I've tested various types
Make the caller loop while there are events to handle, instead.
Signed-off-by: Matt Evans
---
1 byte smaller after Sergei's suggestion.
drivers/usb/host/xhci-ring.c | 16 +---
1 files changed, 9 insertions(+), 7 deletions(-)
diff --git a/drivers/usb/host/xhci-ring.c b/dr
On weakly-ordered systems, the reading of an event's content must occur
after reading the event's validity.
Signed-off-by: Matt Evans
---
Segher, thanks for the comment; explanation added.
drivers/usb/host/xhci-ring.c |5 +
1 files changed, 5 insertions(+), 0 deletions(-)
di
Make the caller loop while there are events to handle, instead.
Signed-off-by: Matt Evans
---
drivers/usb/host/xhci-ring.c | 16 +---
1 files changed, 9 insertions(+), 7 deletions(-)
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb/host/xhci-ring.c
index b46efd9..97bedd6
During a "plug-unplug" stress test on an NEC xHCI card, a null pointer
dereference was observed. xhci_address_device() dereferenced a null
virt_dev (possibly an erroneous udev->slot_id?); this patch adds a WARN_ON &
message to aid debug if it can be recreated.
Signed-o
On weakly-ordered systems, the reading of an event's content must occur
after reading the event's validity.
Signed-off-by: Matt Evans
---
drivers/usb/host/xhci-ring.c |2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/usb/host/xhci-ring.c b/drivers/usb
Add more debug to print queued transfers, show control intentions and
modify an existing message to hexify address output.
Signed-off-by: Matt Evans
---
drivers/usb/host/xhci-dbg.c |2 +-
drivers/usb/host/xhci-hub.c |3 +++
drivers/usb/host/xhci-ring.c |5 +
3 files changed, 9
Hi Sarah,
This series addresses the endian issues with the xHCI driver, and has brought
lovely USB 3 to PPC. :-) I've tested various types of traffic on ppc4xx and
POWER7 and (some sound driver bugs notwithstanding) all seems fine. Also
addresses an ordering problem we found and the recursive n
f secondaries.
Signed-off-by: Matt Evans
Cc: stable
---
arch/powerpc/kernel/head_64.S |6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index 844a44b..4d6681d 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/
;
> Signed-off-by: Anton Blanchard
Looks like a sensible idea!
Acked-by: Matt Evans
> ---
>
> Index: powerpc.git/arch/powerpc/kernel/crash.c
> ===
> --- powerpc.git.orig/arch/powerpc/kernel/crash.c 2010-
ons in the subsequent kernel.
Now, the behaviour is that all available CPUs that were offlined are now
online & usable after the kexec. This mimics the behaviour of a full reboot
(on which all CPUs will be restarted).
Signed-off-by: Matt Evans
---
arch/powerpc/kernel/machine_kex
Tidies some typos, KERN_INFO-ise an info msg, and add a debug msg showing
when the final sequence starts.
Also adds a comment to kexec_prepare_cpus_wait() to make note of a possible
problem; the need for kexec to deal with CPUs that failed to originally start
up.
Signed-off-by: Matt Evans
Separated tidyup comments & debug away from the fix of restarting offline
available CPUs before waiting for them on kexec.
Matt Evans (2):
powerpc/kexec: Add to and tidy debug/comments in machine_kexec64.c
powerpc/kexec: Fix orphaned offline CPUs across kexec
arch/powerpc/ke
Michael Neuling wrote:
> In message <4c511216.30...@ozlabs.org> you wrote:
>> When CPU hotplug is used, some CPUs may be offline at the time a kexec is
>> performed. The subsequent kernel may expect these CPUs to be already running
> ,
>> and will declare them stuck. On pseries, there's also a so
s the kexeced kernel
may ask RTAS if they're online -- and RTAS would say they are. Again, stuck.
This patch kicks each present offline CPU awake before the kexec, so that
none are lost to these assumptions in the subsequent kernel.
Signed-off-by: Matt Evans
---
v2: Added FIXME commen
s the kexeced kernel
may ask RTAS if they're online -- and RTAS would say they are. Again, stuck.
This patch kicks each present offline CPU awake before the kexec, so that
none are lost to these assumptions in the subsequent kernel.
Signed-off-by: Matt Evans
---
arch/powerpc/kernel/machine_
With dynamic PACAs, the kexecing CPU's PACA won't lie within the kernel
static data and there is a chance that something may stomp it when preparing
to kexec. This patch switches this final CPU to a static PACA just before
we pull the switch.
Signed-off-by: Matt Evans
---
v2: Ch
With dynamic PACAs, the kexecing CPU's PACA won't lie within the kernel
static data and there is a chance that something may stomp it when preparing
to kexec. This patch switches this final CPU to a static PACA just before
we pull the switch.
Signed-off-by: Matt Evans
---
arch/powe
heavy test:
perf record -e L1-dcache-load-misses -e L1-dcache-store-misses ./misstest
Signed-off-by: Matt Evans
---
arch/powerpc/kernel/perf_event.c |5 -
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/kernel/perf_event.c b/arch/powerpc/kernel/perf_event.c
ind
Howdy Alex!
Alexander Graf wrote:
> We will soon start and replace instructions from the text section with
> other, paravirtualized versions. To ease the readability of those patches
> I split out the generic looping and magic page mapping code out.
>
> This patch still only contains stubs. But a
ult. This patch iterates for_each_online_cpu so stays
within the bounds of paca[] -- and every CPU is now 'possible'.
Signed-off-by: Matt Evans
---
arch/powerpc/kernel/machine_kexec_64.c | 18 +-
1 files changed, 1 insertions(+), 17 deletions(-)
diff --git a
Paul Mackerras wrote:
> [snip]
> The second alternative -- emulating the lwarx/stwcx and all the
> instructions in between -- sounds complicated but turns out to be
> pretty straightforward in fact, since the code for each instruction is
> pretty small, easy to verify that it's correct, and has lit
fixed-sized arrays from
add_dyn_reconf_usable_mem_property() and add_usable_mem_property(), in lieu of
malloc/realloc/free.
Signed-off-by: Matt Evans
---
kexec/arch/ppc64/fs2dt.c | 82 +++---
1 files changed, 70 insertions(+), 12 deletions(-)
diff --git a
ff-by: Matt Evans
---
kexec/arch/ppc64/fs2dt.c | 66 +
1 files changed, 54 insertions(+), 12 deletions(-)
diff --git a/kexec/arch/ppc64/fs2dt.c b/kexec/arch/ppc64/fs2dt.c
index 762bf04..7470132 100644
--- a/kexec/arch/ppc64/fs2dt.c
+++ b/kexec/arch/
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