: all warnings being treated as errors
mv: cannot stat './.builtin-kvm.o.tmp': No such file or directory
With the build fix:
Acked-by: Ravi Bangoria
'perf version' on powerpc segfaults when used with non-supported
option:
# perf version -a
Segmentation fault (core dumped)
Fix this.
Signed-off-by: Ravi Bangoria
Reviewed-by: Kamalesh babulal
Tested-by: Mamatha Inamdar
---
tools/perf/builtin-version.c | 1 +
1 file changed, 1 insertion
this
instruction was emulated by emulate_step. But because handle_dabr_fault
did not restore emulated register state, r29 still contains stale
value in above register state.
Fixes: 5aae8a5370802 ("powerpc, hw_breakpoints: Implement hw_breakpoints for
64-bit server processors"
t;powerpc/perf: Fix oops when kthread execs
> user process")
>
> Reported-by: Ravi Bangoria
> Reported-by: Young Xiao <92siuy...@gmail.com>
> Cc: Ravi Bangoria
> Cc: Naveen N. Rao
> Cc: Michael Ellerman
> Cc: Jiri Olsa
> Cc: Frederic Weisbecker
> Cc: Stepha
On 5/30/19 2:08 PM, Ravi Bangoria wrote:
>> ---
>> Subject: perf: Fix perf_sample_regs_user()
>> From: Peter Zijlstra
>> Date: Wed May 29 14:37:24 CEST 2019
>>
>> perf_sample_regs_user() uses 'current->mm' to test for the presence of
>> userspa
LGTM. For the series,
Reviewed-By: Ravi Bangoria
Mikey, mpe ...
Any thoughts?
key")
Reported-by: Nageswara R Sastry
Signed-off-by: Ravi Bangoria
---
tools/perf/builtin-c2c.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 9e6cc86..fc68a94 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/buil
On 9/25/19 9:36 AM, Ravi Bangoria wrote:
v3: https://lists.ozlabs.org/pipermail/linuxppc-dev/2019-July/193339.html
v3->v4:
- Instead of considering exception as extraneous when dar is outside of
user specified range, analyse the instruction and check for overlap
between u
We are hadrcoding length everywhere in the watchpoint code.
Introduce macros for the length and use them.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/include/asm/hw_breakpoint.h | 3 +++
arch/powerpc/kernel/hw_breakpoint.c | 4 ++--
arch/powerpc/kernel/ptrace.c | 6
ror=strict-aliasing]
temp16 = *((__u16 *)target);
^
Fixed that.
Ravi Bangoria (7):
Powerpc/Watchpoint: Introduce macros for watchpoint length
Powerpc/Watchpoint: Fix length calculation for unaligned target
Powerpc/Watchpoint: Fix ptrace code that muck around with address/
of blindly ignoring the exception, get actual address range
by analysing an instruction, and ignore only if actual range does
not overlap with user specified range.
Note: The behavior is unchanged for 8xx.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/kernel/hw_breakpoint.c | 52
including next doubleword in the length.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/include/asm/hw_breakpoint.h | 2 +
arch/powerpc/kernel/dawr.c | 6 +--
arch/powerpc/kernel/hw_breakpoint.c | 67 +---
arch/powerpc/kernel/process.c| 3 ++
ar
-by: Ravi Bangoria
---
.../selftests/powerpc/ptrace/ptrace-hwbreak.c | 32 +--
1 file changed, 23 insertions(+), 9 deletions(-)
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-hwbreak.c
b/tools/testing/selftests/powerpc/ptrace/ptrace-hwbreak.c
index 916e97f5f8b1
: No overlap
TESTED: Partial overlap
TESTED: Partial overlap
TESTED: No overlap
TESTED: Full overlap
success: perf_hwbreak
Signed-off-by: Ravi Bangoria
---
.../selftests/powerpc/ptrace/perf-hwbreak.c | 119 +-
1 file changed, 118 insertions(+), 1 deletion(-)
diff --git
second doubleword. So fix that as well.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/include/asm/hw_breakpoint.h | 4 ++--
arch/powerpc/kernel/ptrace.c | 9 +++--
2 files changed, 5 insertions(+), 8 deletions(-)
diff --git a/arch/powerpc/include/asm/hw_breakpoint.h
b/arch
success: ptrace-hwbreak
Signed-off-by: Ravi Bangoria
---
.../selftests/powerpc/ptrace/ptrace-hwbreak.c | 571 +++---
1 file changed, 361 insertions(+), 210 deletions(-)
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-hwbreak.c
b/tools/testing/selftests/powerpc/ptrace/ptrace
@Christophe, Is patch5 works for you on 8xx?
Getting the following :
root@vgoip:~# ./ptrace-hwbreak
test: ptrace-hwbreak
tags: git_version:v5.4-rc2-710-gf0082e173fe4-dirty
PTRACE_SET_DEBUGREG, WO, len: 1: Ok
PTRACE_SET_DEBUGREG, WO, len: 2: Ok
PTRACE_SET_DEBUGREG, WO, len: 4: Ok
On 10/10/19 10:14 AM, Ravi Bangoria wrote:
@Christophe, Is patch5 works for you on 8xx?
Getting the following :
root@vgoip:~# ./ptrace-hwbreak
test: ptrace-hwbreak
tags: git_version:v5.4-rc2-710-gf0082e173fe4-dirty
PTRACE_SET_DEBUGREG, WO, len: 1: Ok
PTRACE_SET_DEBUGREG, WO, len: 2: Ok
://lore.kernel.org/linuxppc-dev/20200414031659.58875-1-ravi.bango...@linux.ibm.com
v3->v4:
- Reduce the scope of local variables to increase readability at some
places, suggested by Christophe.
- Added Michael Neuling's Reviewed by for the series.
- Rebased to powerpc/next
Ravi Bangoria (16):
powe
to HBP_NUM_MAX, which will now represent
maximum number of watchpoints supported by Powerpc.
Signed-off-by: Ravi Bangoria
Reviewed-by: Michael Neuling
---
arch/powerpc/include/asm/cputable.h | 6 +-
arch/powerpc/include/asm/hw_breakpoint.h | 5 +
arch/powerpc/include/asm/processor.h
Future Power architecture is introducing second DAWR. Add SPRN_ macros
for the same.
Signed-off-by: Ravi Bangoria
Reviewed-by: Michael Neuling
---
arch/powerpc/include/asm/reg.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm
Introduce new parameter 'nr' to __set_breakpoint() which indicates
which DAWR should be programed. Also convert current_brk variable
to an array.
Signed-off-by: Ravi Bangoria
Reviewed-by: Michael Neuling
---
arch/powerpc/include/asm/debug.h | 2 +-
arch/powerpc/include/asm
User can ask for num of available watchpoints(dbginfo.num_data_bps)
using ptrace(PPC_PTRACE_GETHWDBGINFO). Return actual number of
available watchpoints on the machine rather than hardcoded 1.
Signed-off-by: Ravi Bangoria
Reviewed-by: Michael Neuling
---
arch/powerpc/kernel/ptrace/ptrace
Future Power architecture is introducing second DAWR. Use real
register names from ISA for current macros:
s/SPRN_DAWR/SPRN_DAWR0/
s/SPRN_DAWRX/SPRN_DAWRX0/
Signed-off-by: Ravi Bangoria
Reviewed-by: Michael Neuling
---
arch/powerpc/include/asm/reg.h | 4 ++--
arch/powerpc/kernel
So far powerpc hw supported only one watchpoint. But Future Power
architecture is introducing 2nd DAWR. Convert thread_struct->hw_brk
into an array.
Signed-off-by: Ravi Bangoria
Reviewed-by: Michael Neuling
---
arch/powerpc/include/asm/processor.h | 2 +-
arch/powerpc/kernel/proces
it.
Signed-off-by: Ravi Bangoria
Reviewed-by: Michael Neuling
---
arch/powerpc/kernel/hw_breakpoint.c | 7 --
arch/powerpc/kernel/process.c | 6 -
arch/powerpc/kernel/ptrace/ptrace-noadv.c | 28 +--
3 files changed, 31 insertions(+), 10 deletions
range overlaps.
Signed-off-by: Ravi Bangoria
Reviewed-by: Michael Neuling
---
arch/powerpc/include/asm/hw_breakpoint.h | 2 +
arch/powerpc/kernel/hw_breakpoint.c | 221 +++
kernel/events/hw_breakpoint.c| 16 ++
3 files changed, 239 insertions(+)
diff
Xmon allows overwriting breakpoints because it's supported by only
one dawr. But with multiple dawrs, overwriting becomes ambiguous
or unnecessary complicated. So let's not allow it.
Signed-off-by: Ravi Bangoria
Reviewed-by: Michael Neuling
---
arch/powerpc/xmon/xmon.c | 4
1 file changed
Add support for 2nd DAWR in xmon. With this, we can have two
simultaneous breakpoints from xmon.
Signed-off-by: Ravi Bangoria
Reviewed-by: Michael Neuling
---
arch/powerpc/xmon/xmon.c | 101 ++-
1 file changed, 69 insertions(+), 32 deletions(-)
diff --git
Currently we calculate hw aligned start and end addresses manually.
Replace them with builtin ALIGN_DOWN() and ALIGN() macros.
So far end_addr was inclusive but this patch makes it exclusive (by
avoiding -1) for better readability.
Suggested-by: Christophe Leroy
Signed-off-by: Ravi Bangoria
Introduce is_ptrace_bp() function and move the check inside the
function. We will utilize it more in later set of patches.
Signed-off-by: Ravi Bangoria
Reviewed-by: Michael Neuling
---
arch/powerpc/kernel/hw_breakpoint.c | 7 ++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git
is
configured for readonly watchpoint and the instruction is store, this
DAWR must not have caused exception.
Signed-off-by: Ravi Bangoria
Reviewed-by: Michael Neuling
---
arch/powerpc/include/asm/processor.h | 2 +-
arch/powerpc/include/asm/sstep.h | 2 +
arch/powerpc/kernel/hw_breakpoint.c
-off-by: Ravi Bangoria
Reviewed-by: Michael Neuling
---
arch/powerpc/kernel/dawr.c | 10 +++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/kernel/dawr.c b/arch/powerpc/kernel/dawr.c
index 8114ad3a8574..500f52fa4711 100644
--- a/arch/powerpc/kernel/dawr.c
+++ b
Instead of disabling only one watchpoint, get num of available
watchpoints dynamically and disable all of them.
Signed-off-by: Ravi Bangoria
Reviewed-by: Michael Neuling
---
arch/powerpc/include/asm/hw_breakpoint.h | 16
1 file changed, 8 insertions(+), 8 deletions(-)
diff
Introduce new parameter 'nr' to set_dawr() which indicates which DAWR
should be programed.
Signed-off-by: Ravi Bangoria
Reviewed-by: Michael Neuling
---
arch/powerpc/include/asm/hw_breakpoint.h | 4 ++--
arch/powerpc/kernel/dawr.c | 15 ++-
arch/powerpc/kernel
On 10/12/19 1:01 PM, Christophe Leroy wrote:
Le 10/10/2019 à 08:25, Ravi Bangoria a écrit :
On 10/10/19 10:14 AM, Ravi Bangoria wrote:
@Christophe, Is patch5 works for you on 8xx?
Getting the following :
root@vgoip:~# ./ptrace-hwbreak
test: ptrace-hwbreak
tags: git_version:v5.4
On 10/12/19 2:21 PM, Christophe Leroy wrote:
Le 10/10/2019 à 06:44, Ravi Bangoria a écrit :
@Christophe, Is patch5 works for you on 8xx?
Getting the following :
root@vgoip:~# ./ptrace-hwbreak
test: ptrace-hwbreak
tags: git_version:v5.4-rc2-710-gf0082e173fe4-dirty
PTRACE_SET_DEBUGREG
We are hadrcoding length everywhere in the watchpoint code.
Introduce macros for the length and use them.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/include/asm/hw_breakpoint.h | 3 +++
arch/powerpc/kernel/hw_breakpoint.c | 4 ++--
arch/powerpc/kernel/ptrace.c | 6
including next doubleword in the length.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/include/asm/hw_breakpoint.h | 2 +
arch/powerpc/kernel/dawr.c | 6 +--
arch/powerpc/kernel/hw_breakpoint.c | 67 +---
arch/powerpc/kernel/process.c| 3 ++
ar
: No overlap
TESTED: Partial overlap
TESTED: Partial overlap
TESTED: No overlap
TESTED: Full overlap
success: perf_hwbreak
Signed-off-by: Ravi Bangoria
---
.../selftests/powerpc/ptrace/perf-hwbreak.c | 111 +-
1 file changed, 110 insertions(+), 1 deletion(-)
diff --git
success: ptrace-hwbreak
Signed-off-by: Ravi Bangoria
---
.../selftests/powerpc/ptrace/ptrace-hwbreak.c | 571 +++---
1 file changed, 361 insertions(+), 210 deletions(-)
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-hwbreak.c
b/tools/testing/selftests/powerpc/ptrace/ptrace
second doubleword. So fix that as well.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/include/asm/hw_breakpoint.h | 4 ++--
arch/powerpc/kernel/ptrace.c | 9 +++--
2 files changed, 5 insertions(+), 8 deletions(-)
diff --git a/arch/powerpc/include/asm/hw_breakpoint.h
b/arch
of blindly ignoring the exception, get actual address range
by analysing an instruction, and ignore only if actual range does
not overlap with user specified range.
Note: The behavior is unchanged for 8xx.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/kernel/hw_breakpoint.c | 52
nts are not supported with DABR. Test
unaligned watchpoint only when DAWR is present.
Ravi Bangoria (7):
Powerpc/Watchpoint: Introduce macros for watchpoint length
Powerpc/Watchpoint: Fix length calculation for unaligned target
Powerpc/Watchpoint: Fix ptrace code that muck around with address/len
Powe
-by: Ravi Bangoria
---
.../selftests/powerpc/ptrace/ptrace-hwbreak.c | 32 +--
1 file changed, 23 insertions(+), 9 deletions(-)
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-hwbreak.c
b/tools/testing/selftests/powerpc/ptrace/ptrace-hwbreak.c
index 916e97f5f8b1
ted it
with ep88xc_defconfig.
Ravi Bangoria (5):
Powerpc/Watchpoint: Fix length calculation for unaligned target
Powerpc/Watchpoint: Don't ignore extraneous exceptions blindly
Powerpc/Watchpoint: Rewrite ptrace-hwbreak.c selftest
Powerpc/Watchpoint: Add dar outside test in perf-hwbreak.c selftest
Powe
success: ptrace-hwbreak
Signed-off-by: Ravi Bangoria
---
.../selftests/powerpc/ptrace/ptrace-hwbreak.c | 571 +++---
1 file changed, 361 insertions(+), 210 deletions(-)
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-hwbreak.c
b/tools/testing/selftests/powerpc/ptrace/ptrace
including next doubleword in the length. Plus, fix
ptrace code which is messing up address/len.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/include/asm/debug.h | 1 +
arch/powerpc/include/asm/hw_breakpoint.h | 9 +++--
arch/powerpc/kernel/dawr.c | 6 ++--
arch/powe
of blindly ignoring the exception, get actual address range
by analysing an instruction, and ignore only if actual range does
not overlap with user specified range.
Note: The behaviour is unchanged for 8xx.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/kernel/hw_breakpoint.c | 52
: No overlap
TESTED: Partial overlap
TESTED: Partial overlap
TESTED: No overlap
TESTED: Full overlap
success: perf_hwbreak
Signed-off-by: Ravi Bangoria
---
.../selftests/powerpc/ptrace/perf-hwbreak.c | 111 +-
1 file changed, 110 insertions(+), 1 deletion(-)
diff --git
On the 8xx, signals are generated after executing the instruction.
So no need to manually single-step on 8xx.
Signed-off-by: Ravi Bangoria
---
.../selftests/powerpc/ptrace/ptrace-hwbreak.c | 26 ++-
1 file changed, 19 insertions(+), 7 deletions(-)
diff --git a/tools/testing
On 9/4/19 8:12 PM, Naveen N. Rao wrote:
Ravi Bangoria wrote:
On Powerpc64, watchpoint match range is double-word granular. On
a watchpoint hit, DAR is set to the first byte of overlap between
actual access and watched range. And thus it's quite possible that
DAR does not point inside user
Hi Jordan,
On 7/20/20 12:24 PM, Jordan Niethe wrote:
On Fri, Jul 17, 2020 at 2:11 PM Ravi Bangoria
wrote:
Power10 has removed 512 bytes boundary from match criteria. i.e. The watch
range can cross 512 bytes boundary.
It looks like this change is not mentioned in ISA v3.1 Book III 9.4
Data
On 7/20/20 9:12 AM, Jordan Niethe wrote:
On Fri, Jul 17, 2020 at 2:11 PM Ravi Bangoria
wrote:
So far Book3S Powerpc supported only one watchpoint. Power10 is
introducing 2nd DAWR. Enable 2nd DAWR support for Power10.
Availability of 2nd DAWR will depend on CPU_FTR_DAWR1.
Signed-off
On 7/17/20 11:14 AM, Jordan Niethe wrote:
On Fri, Jul 17, 2020 at 2:10 PM Ravi Bangoria
wrote:
Add new device-tree feature for 2nd DAWR. If this feature is present,
2nd DAWR is supported, otherwise not.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/include/asm/cputable.h | 7
@@ -46,7 +47,7 @@ struct arch_hw_breakpoint {
static inline int nr_wp_slots(void)
{
- return HBP_NUM_MAX;
+ return cpu_has_feature(CPU_FTR_DAWR1) ? HBP_NUM_TWO : HBP_NUM_ONE;
So it'd be something like:
+ return cpu_has_feature(CPU_FTR_DAWR1) ? HBP_NUM_MAX : 1;
But
On 7/21/20 5:06 PM, Michael Ellerman wrote:
Ravi Bangoria writes:
On 7/20/20 9:12 AM, Jordan Niethe wrote:
On Fri, Jul 17, 2020 at 2:11 PM Ravi Bangoria
wrote:
So far Book3S Powerpc supported only one watchpoint. Power10 is
introducing 2nd DAWR. Enable 2nd DAWR support for Power10
On 7/21/20 4:59 PM, Michael Ellerman wrote:
Ravi Bangoria writes:
On 7/17/20 11:14 AM, Jordan Niethe wrote:
On Fri, Jul 17, 2020 at 2:10 PM Ravi Bangoria
wrote:
Add new device-tree feature for 2nd DAWR. If this feature is present,
2nd DAWR is supported, otherwise not.
Signed-off
On 7/21/20 7:37 PM, Michael Ellerman wrote:
Ravi Bangoria writes:
On 7/21/20 4:59 PM, Michael Ellerman wrote:
Ravi Bangoria writes:
On 7/17/20 11:14 AM, Jordan Niethe wrote:
On Fri, Jul 17, 2020 at 2:10 PM Ravi Bangoria
wrote:
Add new device-tree feature for 2nd DAWR. If this feature
Hi Jordan,
@@ -536,7 +538,12 @@ static bool check_dawrx_constraints(struct pt_regs *regs,
int type,
if (OP_IS_LOAD(type) && !(info->type & HW_BRK_TYPE_READ))
return false;
- if (OP_IS_STORE(type) && !(info->type & HW_BRK_TYPE_WRITE))
+ /*
+* The
Hi Pratik,
On 7/10/20 10:52 AM, Pratik Rajesh Sampat wrote:
Additional registers DAWR0, DAWRX0 may be lost on Power 10 for
stop levels < 4.
p10 has one more pair DAWR1/DAWRX1. Please include that as well.
Ravi
Hi Nick,
On 7/13/20 11:22 AM, Nicholas Piggin wrote:
Excerpts from Pratik Rajesh Sampat's message of July 10, 2020 3:22 pm:
Additional registers DAWR0, DAWRX0 may be lost on Power 10 for
stop levels < 4.
Therefore save the values of these SPRs before entering a "stop"
state and restore their
Hi Arnaldo,
Can you please consider this trivial fix.
Ravi
On 6/19/20 7:04 PM, Ravi Bangoria wrote:
Any option macro with _SET suffix should set opt->set variable which
is not happening for OPT_CALLBACK_SET(). This is causing issues with
perf record --switch-output-event. Fix that.
Bef
: Use builtin ALIGN*() macros")
Reported-by: Milton Miller
Signed-off-by: Ravi Bangoria
Tested-by: Jordan Niethe
---
arch/powerpc/kernel/hw_breakpoint.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/hw_breakpoint.c
b/arch/powerpc/kernel/hw_breakpoi
->v4:
- v3 patch #2 is split into two v4 patches: #2 and #3
- Few other minor neats suggested by Jordan Niethe
- Rebased to powerpc/next
[1]:
https://lore.kernel.org/linuxppc-dev/20200514111741.97993-1-ravi.bango...@linux.ibm.com/
Ravi Bangoria (10):
powerpc/watchpoint: Fix 512 byte bound
Franco de Carvalho
Signed-off-by: Ravi Bangoria
---
arch/powerpc/kernel/hw_breakpoint.c | 72 -
1 file changed, 41 insertions(+), 31 deletions(-)
diff --git a/arch/powerpc/kernel/hw_breakpoint.c
b/arch/powerpc/kernel/hw_breakpoint.c
index 031e6defc08e..a971e22aea81 10
ot;)
Fixes: 74c6881019b7 ("powerpc/watchpoint: Prepare handler to handle more than
one watchpoint")
Signed-off-by: Ravi Bangoria
---
arch/powerpc/kernel/hw_breakpoint.c | 21 -
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/hw_breakpoi
Current H_SET_MODE hcall macro name for setting/resetting DAWR0 is
H_SET_MODE_RESOURCE_SET_DAWR. Add suffix 0 to macro name as well.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/include/asm/hvcall.h | 2 +-
arch/powerpc/include/asm/plpar_wrappers.h | 2 +-
arch/powerpc/kvm/book3s_hv.c
Add new device-tree feature for 2nd DAWR. If this feature is present,
2nd DAWR is supported, otherwise not.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/include/asm/cputable.h | 7 +--
arch/powerpc/kernel/dt_cpu_ftrs.c | 7 +++
2 files changed, 12 insertions(+), 2 deletions(-)
diff
CPU_FTR_DAWR to CPU_FTRS_POWER10. Note that
this change does not enable 2nd DAWR support.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/include/asm/cputable.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/include/asm/cputable.h
b/arch/powerpc/include/asm/cputable.h
Power10 has removed 512 bytes boundary from match criteria. i.e. The watch
range can cross 512 bytes boundary.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/kernel/hw_breakpoint.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kernel/hw_breakpoint.c
b
So far Book3S Powerpc supported only one watchpoint. Power10 is
introducing 2nd DAWR. Enable 2nd DAWR support for Power10.
Availability of 2nd DAWR will depend on CPU_FTR_DAWR1.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/include/asm/cputable.h | 4 +++-
arch/powerpc/include/asm
or
guests and thus this change is mostly applicable for guests only.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/kernel/prom.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 9cc49f265c86..c76c09b97bc8 100644
--- a/arch/po
2nd DAWR can be set/unset using H_SET_MODE hcall with resource value 5.
Enable powervm guest support with that. This has no effect on kvm guest
because kvm will return error if guest does hcall with resource value 5.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/include/asm/hvcall.h | 1
: Use builtin ALIGN*() macros")
Reported-by: Milton Miller
Signed-off-by: Ravi Bangoria
Tested-by: Jordan Niethe
---
arch/powerpc/kernel/hw_breakpoint.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/hw_breakpoint.c
b/arch/powerpc/kernel/hw_breakpoi
Franco de Carvalho
Signed-off-by: Ravi Bangoria
---
arch/powerpc/kernel/hw_breakpoint.c | 72 -
1 file changed, 41 insertions(+), 31 deletions(-)
diff --git a/arch/powerpc/kernel/hw_breakpoint.c
b/arch/powerpc/kernel/hw_breakpoint.c
index 031e6defc08e..a971e22aea81 10
com/
Ravi Bangoria (10):
powerpc/watchpoint: Fix 512 byte boundary limit
powerpc/watchpoint: Fix DAWR exception constraint
powerpc/watchpoint: Fix DAWR exception for CACHEOP
powerpc/watchpoint: Enable watchpoint functionality on power10 guest
powerpc/dt_cpu_ftrs: Add feature for 2nd D
CPU_FTR_DAWR to CPU_FTRS_POWER10. Note that
this change does not enable 2nd DAWR support.
Signed-off-by: Ravi Bangoria
Tested-by: Jordan Niethe
---
arch/powerpc/include/asm/cputable.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/powerpc/include/asm/cputable.h
b/arch
Add new device-tree feature for 2nd DAWR. If this feature is present,
2nd DAWR is supported, otherwise not.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/include/asm/cputable.h | 3 ++-
arch/powerpc/kernel/dt_cpu_ftrs.c | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/arch
or
guests and thus this change is mostly applicable for guests only.
Signed-off-by: Ravi Bangoria
Tested-by: Jordan Niethe
---
arch/powerpc/kernel/prom.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 033d43819ed8..01dda206
ot;)
Fixes: 74c6881019b7 ("powerpc/watchpoint: Prepare handler to handle more than
one watchpoint")
Signed-off-by: Ravi Bangoria
---
arch/powerpc/kernel/hw_breakpoint.c | 21 -
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/hw_breakpoi
2nd DAWR can be set/unset using H_SET_MODE hcall with resource value 5.
Enable powervm guest support with that. This has no effect on kvm guest
because kvm will return error if guest does hcall with resource value 5.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/include/asm/hvcall.h | 1
Current H_SET_MODE hcall macro name for setting/resetting DAWR0 is
H_SET_MODE_RESOURCE_SET_DAWR. Add suffix 0 to macro name as well.
Signed-off-by: Ravi Bangoria
Reviewed-by: Jordan Niethe
---
arch/powerpc/include/asm/hvcall.h | 2 +-
arch/powerpc/include/asm/plpar_wrappers.h | 2
So far Book3S Powerpc supported only one watchpoint. Power10 is
introducing 2nd DAWR. Enable 2nd DAWR support for Power10.
Availability of 2nd DAWR will depend on CPU_FTR_DAWR1.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/include/asm/cputable.h | 5 +++--
arch/powerpc/include/asm
mentions about removal of 512B boundary:
Multiple DEAW:
Added a second Data Address Watchpoint. [H]DAR is
set to the first byte of overlap. 512B boundary is
removed.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/kernel/hw_breakpoint.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions
that availability of
2nd DAWR is independent of this flag and should be checked using
ppc_debug_info->num_data_bps.
Signed-off-by: Ravi Bangoria
---
v1->v2:
- Mention new flag in Documentaion/ as well.
Documentation/powerpc/ptrace.rst | 1 +
arch/powerpc/include/uapi/asm/ptrace.h
Introduce KVM_CAP_PPC_DAWR1 which can be used by Qemu to query whether
kvm supports 2nd DAWR or not.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/kvm/powerpc.c | 3 +++
include/uapi/linux/kvm.h | 1 +
2 files changed, 4 insertions(+)
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc
, one is RO, other is WO
TESTED: Process specific, 512 bytes, unaligned
success: perf_hwbreak
Signed-off-by: Ravi Bangoria
---
.../selftests/powerpc/ptrace/perf-hwbreak.c | 568 +-
1 file changed, 567 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/powerpc
Power10 is introducing second DAWR. Use real register names (with
suffix 0) from ISA for current macros and variables used by kvm.
Signed-off-by: Ravi Bangoria
---
Documentation/virt/kvm/api.rst| 4 +--
arch/powerpc/include/asm/kvm_host.h | 4 +--
arch/powerpc/include/uapi
perf-hwbreak selftest opens hw-breakpoint event at multiple places for
which it has same code repeated. Coalesce that code into a function.
Signed-off-by: Ravi Bangoria
---
.../selftests/powerpc/ptrace/perf-hwbreak.c | 78 +--
1 file changed, 38 insertions(+), 40 deletions
kvm code assumes single DAWR everywhere. Add code to support 2nd DAWR.
DAWR is a hypervisor resource and thus H_SET_MODE hcall is used to set/
unset it. Introduce new case H_SET_MODE_RESOURCE_SET_DAWR1 for 2nd DAWR.
Also, kvm will support 2nd DAWR only if CPU_FTR_DAWR1 is set.
Signed-off-by: Ravi
://lore.kernel.org/linuxppc-dev/20200723093330.306341-1-ravi.bango...@linux.ibm.com
Patches in this series applies fine on top of powerpc/next (9a77c4a0a125)
plus above dependency patches.
Ravi Bangoria (7):
powerpc/watchpoint/kvm: Rename current DAWR macros and variables
powerpc/watchpoint/kvm: Add
, len: 6: Ok
PPC_PTRACE_SETHWDEBUG 2, MODE_RANGE, DAWR Overlap, RO, len: 6: Ok
Signed-off-by: Ravi Bangoria
---
.../selftests/powerpc/ptrace/ptrace-hwbreak.c | 79 +++
1 file changed, 79 insertions(+)
diff --git a/tools/testing/selftests/powerpc/ptrace/ptrace-hwbreak.c
b/tools
erlapping): Ok
ptrace thread event -> perf other thread & cpu event: Ok
success: ptrace-perf-hwbreak
Signed-off-by: Ravi Bangoria
---
.../selftests/powerpc/ptrace/.gitignore | 1 +
.../testing/selftests/powerpc/ptrace/Makefile | 2 +-
.../powerpc/ptrace/ptrace-perf-hwbreak.
On 7/23/20 3:50 PM, Ravi Bangoria wrote:
Patch #1, #2 and #3 enables p10 2nd DAWR feature for Book3S kvm guest. DAWR
is a hypervisor resource and thus H_SET_MODE hcall is used to set/unset it.
A new case H_SET_MODE_RESOURCE_SET_DAWR1 is introduced in H_SET_MODE hcall
for setting/unsetting 2nd
Peter / mpe,
Is the v2 looks good? If so, can anyone of you please pick this up.
On 6/4/19 9:59 AM, Ravi Bangoria wrote:
> perf_event_open() limits the sample_period to 63 bits. See
> commit 0819b2e30ccb ("perf: Limit perf_event_attr::sample_period
> to 63 bits"). Make
Move feature availability check at the start of the function.
Rearrange comment to it's associated code. Use hw->address and
hw->len in the 512 bytes boundary check(to write if statement
in a single line). Add spacing between code blocks.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/
patch 1-3: Code refactor
patch 4: Speedup disabling breakpoint
patch 5: Fix length calculation for unaligned targets
Ravi Bangoria (5):
Powerpc/hw-breakpoint: Replace stale do_dabr() with do_break()
Powerpc/hw-breakpoint: Refactor hw_breakpoint_arch_parse()
Powerpc/hw-breakpoint: Refactor
Directly setting dawr and dawrx with 0 should be enough to
disable watchpoint. No need to reset individual bits in
variable and then set in hw.
Signed-off-by: Ravi Bangoria
---
arch/powerpc/include/asm/hw_breakpoint.h | 3 ++-
arch/powerpc/kernel/process.c| 12
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