* [PATCH AUTOSEL 4.19 07/38] powerpc/xive: Ignore kmemleak false positives
[not found] <20200821161807.348600-1-sashal@kernel.org>
@ 2020-08-21 16:17 ` Sasha Levin
2020-08-21 16:17 ` [PATCH AUTOSEL 4.19 20/38] selftests/powerpc: Purge extra count_pmc() calls of ebb selftests Sasha Levin
1 sibling, 0 replies; 2+ messages in thread
From: Sasha Levin @ 2020-08-21 16:17 UTC (permalink / raw)
To: linux-kernel, stable; +Cc: Alexey Kardashevskiy, linuxppc-dev, Sasha Levin
From: Alexey Kardashevskiy <aik@ozlabs.ru>
[ Upstream commit f0993c839e95dd6c7f054a1015e693c87e33e4fb ]
xive_native_provision_pages() allocates memory and passes the pointer to
OPAL so kmemleak cannot find the pointer usage in the kernel memory and
produces a false positive report (below) (even if the kernel did scan
OPAL memory, it is unable to deal with __pa() addresses anyway).
This silences the warning.
unreferenced object 0xc000200350c40000 (size 65536):
comm "qemu-system-ppc", pid 2725, jiffies 4294946414 (age 70776.530s)
hex dump (first 32 bytes):
02 00 00 00 50 00 00 00 00 00 00 00 00 00 00 00 ....P...........
01 00 08 07 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<0000000081ff046c>] xive_native_alloc_vp_block+0x120/0x250
[<00000000d555d524>] kvmppc_xive_compute_vp_id+0x248/0x350 [kvm]
[<00000000d69b9c9f>] kvmppc_xive_connect_vcpu+0xc0/0x520 [kvm]
[<000000006acbc81c>] kvm_arch_vcpu_ioctl+0x308/0x580 [kvm]
[<0000000089c69580>] kvm_vcpu_ioctl+0x19c/0xae0 [kvm]
[<00000000902ae91e>] ksys_ioctl+0x184/0x1b0
[<00000000f3e68bd7>] sys_ioctl+0x48/0xb0
[<0000000001b2c127>] system_call_exception+0x124/0x1f0
[<00000000d2b2ee40>] system_call_common+0xe8/0x214
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200612043303.84894-1-aik@ozlabs.ru
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/powerpc/sysdev/xive/native.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/sysdev/xive/native.c b/arch/powerpc/sysdev/xive/native.c
index cb1f51ad48e40..411f785cdfb51 100644
--- a/arch/powerpc/sysdev/xive/native.c
+++ b/arch/powerpc/sysdev/xive/native.c
@@ -22,6 +22,7 @@
#include <linux/delay.h>
#include <linux/cpumask.h>
#include <linux/mm.h>
+#include <linux/kmemleak.h>
#include <asm/prom.h>
#include <asm/io.h>
@@ -627,6 +628,7 @@ static bool xive_native_provision_pages(void)
pr_err("Failed to allocate provisioning page\n");
return false;
}
+ kmemleak_ignore(p);
opal_xive_donate_page(chip, __pa(p));
}
return true;
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread* [PATCH AUTOSEL 4.19 20/38] selftests/powerpc: Purge extra count_pmc() calls of ebb selftests
[not found] <20200821161807.348600-1-sashal@kernel.org>
2020-08-21 16:17 ` [PATCH AUTOSEL 4.19 07/38] powerpc/xive: Ignore kmemleak false positives Sasha Levin
@ 2020-08-21 16:17 ` Sasha Levin
1 sibling, 0 replies; 2+ messages in thread
From: Sasha Levin @ 2020-08-21 16:17 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Sachin Sant, Sasha Levin, Desnes A. Nunes do Rosario,
linux-kselftest, linuxppc-dev
From: "Desnes A. Nunes do Rosario" <desnesn@linux.ibm.com>
[ Upstream commit 3337bf41e0dd70b4064cdf60acdfcdc2d050066c ]
An extra count on ebb_state.stats.pmc_count[PMC_INDEX(pmc)] is being per-
formed when count_pmc() is used to reset PMCs on a few selftests. This
extra pmc_count can occasionally invalidate results, such as the ones from
cycles_test shown hereafter. The ebb_check_count() failed with an above
the upper limit error due to the extra value on ebb_state.stats.pmc_count.
Furthermore, this extra count is also indicated by extra PMC1 trace_log on
the output of the cycle test (as well as on pmc56_overflow_test):
==========
...
[21]: counter = 8
[22]: register SPRN_MMCR0 = 0x0000000080000080
[23]: register SPRN_PMC1 = 0x0000000080000004
[24]: counter = 9
[25]: register SPRN_MMCR0 = 0x0000000080000080
[26]: register SPRN_PMC1 = 0x0000000080000004
[27]: counter = 10
[28]: register SPRN_MMCR0 = 0x0000000080000080
[29]: register SPRN_PMC1 = 0x0000000080000004
>> [30]: register SPRN_PMC1 = 0x000000004000051e
PMC1 count (0x280000546) above upper limit 0x2800003e8 (+0x15e)
[FAIL] Test FAILED on line 52
failure: cycles
==========
Signed-off-by: Desnes A. Nunes do Rosario <desnesn@linux.ibm.com>
Tested-by: Sachin Sant <sachinp@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200626164737.21943-1-desnesn@linux.ibm.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c | 2 --
tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c | 2 --
.../selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c | 2 --
.../selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c | 2 --
tools/testing/selftests/powerpc/pmu/ebb/ebb.c | 2 --
.../selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c | 2 --
.../selftests/powerpc/pmu/ebb/lost_exception_test.c | 1 -
.../testing/selftests/powerpc/pmu/ebb/multi_counter_test.c | 7 -------
.../selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c | 2 --
.../testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c | 2 --
.../selftests/powerpc/pmu/ebb/pmc56_overflow_test.c | 2 --
11 files changed, 26 deletions(-)
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c b/tools/testing/selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c
index 94110b1dcd3d8..031baa43646fb 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/back_to_back_ebbs_test.c
@@ -91,8 +91,6 @@ int back_to_back_ebbs(void)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(1, sample_period);
-
dump_ebb_state();
event_close(&event);
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c b/tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c
index 7c57a8d79535d..361e0be9df9ae 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/cycles_test.c
@@ -42,8 +42,6 @@ int cycles(void)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(1, sample_period);
-
dump_ebb_state();
event_close(&event);
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c b/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c
index ecf5ee3283a3e..fe7d0dc2a1a26 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_freeze_test.c
@@ -99,8 +99,6 @@ int cycles_with_freeze(void)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(1, sample_period);
-
dump_ebb_state();
printf("EBBs while frozen %d\n", ebbs_while_frozen);
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c b/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c
index c0faba520b35c..b9b30f974b5ea 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/cycles_with_mmcr2_test.c
@@ -71,8 +71,6 @@ int cycles_with_mmcr2(void)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(1, sample_period);
-
dump_ebb_state();
event_close(&event);
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/ebb.c b/tools/testing/selftests/powerpc/pmu/ebb/ebb.c
index 46681fec549b8..2694ae161a84a 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/ebb.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/ebb.c
@@ -396,8 +396,6 @@ int ebb_child(union pipe read_pipe, union pipe write_pipe)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(1, sample_period);
-
dump_ebb_state();
event_close(&event);
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c b/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c
index a991d2ea8d0a1..174e4f4dae6c0 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/ebb_on_willing_child_test.c
@@ -38,8 +38,6 @@ static int victim_child(union pipe read_pipe, union pipe write_pipe)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(1, sample_period);
-
dump_ebb_state();
FAIL_IF(ebb_state.stats.ebb_count == 0);
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/lost_exception_test.c b/tools/testing/selftests/powerpc/pmu/ebb/lost_exception_test.c
index 2ed7ad33f7a3b..dddb95938304e 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/lost_exception_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/lost_exception_test.c
@@ -75,7 +75,6 @@ static int test_body(void)
ebb_freeze_pmcs();
ebb_global_disable();
- count_pmc(4, sample_period);
mtspr(SPRN_PMC4, 0xdead);
dump_summary_ebb_state();
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c b/tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c
index 6ff8c8ff27d66..035c02273cd49 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/multi_counter_test.c
@@ -70,13 +70,6 @@ int multi_counter(void)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(1, sample_period);
- count_pmc(2, sample_period);
- count_pmc(3, sample_period);
- count_pmc(4, sample_period);
- count_pmc(5, sample_period);
- count_pmc(6, sample_period);
-
dump_ebb_state();
for (i = 0; i < 6; i++)
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c b/tools/testing/selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c
index 037cb6154f360..3e9d4ac965c85 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/multi_ebb_procs_test.c
@@ -61,8 +61,6 @@ static int cycles_child(void)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(1, sample_period);
-
dump_summary_ebb_state();
event_close(&event);
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c b/tools/testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c
index c5fa64790c22e..d90891fe96a32 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/pmae_handling_test.c
@@ -82,8 +82,6 @@ static int test_body(void)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(1, sample_period);
-
dump_ebb_state();
if (mmcr0_mismatch)
diff --git a/tools/testing/selftests/powerpc/pmu/ebb/pmc56_overflow_test.c b/tools/testing/selftests/powerpc/pmu/ebb/pmc56_overflow_test.c
index 30e1ac62e8cb4..8ca92b9ee5b01 100644
--- a/tools/testing/selftests/powerpc/pmu/ebb/pmc56_overflow_test.c
+++ b/tools/testing/selftests/powerpc/pmu/ebb/pmc56_overflow_test.c
@@ -76,8 +76,6 @@ int pmc56_overflow(void)
ebb_global_disable();
ebb_freeze_pmcs();
- count_pmc(2, sample_period);
-
dump_ebb_state();
printf("PMC5/6 overflow %d\n", pmc56_overflowed);
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread