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-rw-r--r--arch/powerpc/platforms/microwatt/microwatt.h7
-rw-r--r--arch/powerpc/platforms/microwatt/rng.c10
-rw-r--r--arch/powerpc/platforms/microwatt/setup.c8
-rw-r--r--arch/powerpc/platforms/powernv/Makefile1
-rw-r--r--arch/powerpc/platforms/powernv/powernv.h2
-rw-r--r--arch/powerpc/platforms/powernv/rng.c66
-rw-r--r--arch/powerpc/platforms/powernv/setup.c2
-rw-r--r--arch/powerpc/platforms/pseries/papr_scm.c3
-rw-r--r--arch/powerpc/platforms/pseries/pseries.h2
-rw-r--r--arch/powerpc/platforms/pseries/rng.c11
-rw-r--r--arch/powerpc/platforms/pseries/setup.c1
11 files changed, 77 insertions, 36 deletions
diff --git a/arch/powerpc/platforms/microwatt/microwatt.h b/arch/powerpc/platforms/microwatt/microwatt.h
new file mode 100644
index 000000000000..335417e95e66
--- /dev/null
+++ b/arch/powerpc/platforms/microwatt/microwatt.h
@@ -0,0 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _MICROWATT_H
+#define _MICROWATT_H
+
+void microwatt_rng_init(void);
+
+#endif /* _MICROWATT_H */
diff --git a/arch/powerpc/platforms/microwatt/rng.c b/arch/powerpc/platforms/microwatt/rng.c
index 7bc4d1cbfaf0..8ece87d005c8 100644
--- a/arch/powerpc/platforms/microwatt/rng.c
+++ b/arch/powerpc/platforms/microwatt/rng.c
@@ -11,6 +11,7 @@
#include <asm/archrandom.h>
#include <asm/cputable.h>
#include <asm/machdep.h>
+#include "microwatt.h"
#define DARN_ERR 0xFFFFFFFFFFFFFFFFul
@@ -29,7 +30,7 @@ static int microwatt_get_random_darn(unsigned long *v)
return 1;
}
-static __init int rng_init(void)
+void __init microwatt_rng_init(void)
{
unsigned long val;
int i;
@@ -37,12 +38,7 @@ static __init int rng_init(void)
for (i = 0; i < 10; i++) {
if (microwatt_get_random_darn(&val)) {
ppc_md.get_random_seed = microwatt_get_random_darn;
- return 0;
+ return;
}
}
-
- pr_warn("Unable to use DARN for get_random_seed()\n");
-
- return -EIO;
}
-machine_subsys_initcall(, rng_init);
diff --git a/arch/powerpc/platforms/microwatt/setup.c b/arch/powerpc/platforms/microwatt/setup.c
index 0b02603bdb74..6b32539395a4 100644
--- a/arch/powerpc/platforms/microwatt/setup.c
+++ b/arch/powerpc/platforms/microwatt/setup.c
@@ -16,6 +16,8 @@
#include <asm/xics.h>
#include <asm/udbg.h>
+#include "microwatt.h"
+
static void __init microwatt_init_IRQ(void)
{
xics_init();
@@ -32,10 +34,16 @@ static int __init microwatt_populate(void)
}
machine_arch_initcall(microwatt, microwatt_populate);
+static void __init microwatt_setup_arch(void)
+{
+ microwatt_rng_init();
+}
+
define_machine(microwatt) {
.name = "microwatt",
.probe = microwatt_probe,
.init_IRQ = microwatt_init_IRQ,
+ .setup_arch = microwatt_setup_arch,
.progress = udbg_progress,
.calibrate_decr = generic_calibrate_decr,
};
diff --git a/arch/powerpc/platforms/powernv/Makefile b/arch/powerpc/platforms/powernv/Makefile
index 6488b3842199..19f0fc5c6f1b 100644
--- a/arch/powerpc/platforms/powernv/Makefile
+++ b/arch/powerpc/platforms/powernv/Makefile
@@ -4,6 +4,7 @@
# in particular, idle code runs a bunch of things in real mode
KASAN_SANITIZE_idle.o := n
KASAN_SANITIZE_pci-ioda.o := n
+KASAN_SANITIZE_pci-ioda-tce.o := n
# pnv_machine_check_early
KASAN_SANITIZE_setup.o := n
diff --git a/arch/powerpc/platforms/powernv/powernv.h b/arch/powerpc/platforms/powernv/powernv.h
index e297bf4abfcb..866efdc103fd 100644
--- a/arch/powerpc/platforms/powernv/powernv.h
+++ b/arch/powerpc/platforms/powernv/powernv.h
@@ -42,4 +42,6 @@ ssize_t memcons_copy(struct memcons *mc, char *to, loff_t pos, size_t count);
u32 __init memcons_get_size(struct memcons *mc);
struct memcons *__init memcons_init(struct device_node *node, const char *mc_prop_name);
+void pnv_rng_init(void);
+
#endif /* _POWERNV_H */
diff --git a/arch/powerpc/platforms/powernv/rng.c b/arch/powerpc/platforms/powernv/rng.c
index e3d44b36ae98..3805ad13b8f3 100644
--- a/arch/powerpc/platforms/powernv/rng.c
+++ b/arch/powerpc/platforms/powernv/rng.c
@@ -17,6 +17,7 @@
#include <asm/prom.h>
#include <asm/machdep.h>
#include <asm/smp.h>
+#include "powernv.h"
#define DARN_ERR 0xFFFFFFFFFFFFFFFFul
@@ -28,7 +29,6 @@ struct powernv_rng {
static DEFINE_PER_CPU(struct powernv_rng *, powernv_rng);
-
int powernv_hwrng_present(void)
{
struct powernv_rng *rng;
@@ -98,9 +98,6 @@ static int __init initialise_darn(void)
return 0;
}
}
-
- pr_warn("Unable to use DARN for get_random_seed()\n");
-
return -EIO;
}
@@ -163,32 +160,59 @@ static __init int rng_create(struct device_node *dn)
rng_init_per_cpu(rng, dn);
- pr_info_once("Registering arch random hook.\n");
-
ppc_md.get_random_seed = powernv_get_random_long;
return 0;
}
-static __init int rng_init(void)
+static int __init pnv_get_random_long_early(unsigned long *v)
{
struct device_node *dn;
- int rc;
-
- for_each_compatible_node(dn, NULL, "ibm,power-rng") {
- rc = rng_create(dn);
- if (rc) {
- pr_err("Failed creating rng for %pOF (%d).\n",
- dn, rc);
- continue;
- }
- /* Create devices for hwrng driver */
- of_platform_device_create(dn, NULL, NULL);
- }
+ if (!slab_is_available())
+ return 0;
+
+ if (cmpxchg(&ppc_md.get_random_seed, pnv_get_random_long_early,
+ NULL) != pnv_get_random_long_early)
+ return 0;
+
+ for_each_compatible_node(dn, NULL, "ibm,power-rng")
+ rng_create(dn);
+
+ if (!ppc_md.get_random_seed)
+ return 0;
+ return ppc_md.get_random_seed(v);
+}
- initialise_darn();
+void __init pnv_rng_init(void)
+{
+ struct device_node *dn;
+
+ /* Prefer darn over the rest. */
+ if (!initialise_darn())
+ return;
+
+ dn = of_find_compatible_node(NULL, NULL, "ibm,power-rng");
+ if (dn)
+ ppc_md.get_random_seed = pnv_get_random_long_early;
+
+ of_node_put(dn);
+}
+
+static int __init pnv_rng_late_init(void)
+{
+ struct device_node *dn;
+ unsigned long v;
+
+ /* In case it wasn't called during init for some other reason. */
+ if (ppc_md.get_random_seed == pnv_get_random_long_early)
+ pnv_get_random_long_early(&v);
+
+ if (ppc_md.get_random_seed == powernv_get_random_long) {
+ for_each_compatible_node(dn, NULL, "ibm,power-rng")
+ of_platform_device_create(dn, NULL, NULL);
+ }
return 0;
}
-machine_subsys_initcall(powernv, rng_init);
+machine_subsys_initcall(powernv, pnv_rng_late_init);
diff --git a/arch/powerpc/platforms/powernv/setup.c b/arch/powerpc/platforms/powernv/setup.c
index 824c3ad7a0fa..dac545aa0308 100644
--- a/arch/powerpc/platforms/powernv/setup.c
+++ b/arch/powerpc/platforms/powernv/setup.c
@@ -203,6 +203,8 @@ static void __init pnv_setup_arch(void)
pnv_check_guarded_cores();
/* XXX PMCS */
+
+ pnv_rng_init();
}
static void __init pnv_init(void)
diff --git a/arch/powerpc/platforms/pseries/papr_scm.c b/arch/powerpc/platforms/pseries/papr_scm.c
index 181b855b3050..82cae08976bc 100644
--- a/arch/powerpc/platforms/pseries/papr_scm.c
+++ b/arch/powerpc/platforms/pseries/papr_scm.c
@@ -465,6 +465,9 @@ static int papr_scm_pmu_check_events(struct papr_scm_priv *p, struct nvdimm_pmu
u32 available_events;
int index, rc = 0;
+ if (!p->stat_buffer_len)
+ return -ENOENT;
+
available_events = (p->stat_buffer_len - sizeof(struct papr_scm_perf_stats))
/ sizeof(struct papr_scm_perf_stat);
if (available_events == 0)
diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h
index f5c916c839c9..1d75b7742ef0 100644
--- a/arch/powerpc/platforms/pseries/pseries.h
+++ b/arch/powerpc/platforms/pseries/pseries.h
@@ -122,4 +122,6 @@ void pseries_lpar_read_hblkrm_characteristics(void);
static inline void pseries_lpar_read_hblkrm_characteristics(void) { }
#endif
+void pseries_rng_init(void);
+
#endif /* _PSERIES_PSERIES_H */
diff --git a/arch/powerpc/platforms/pseries/rng.c b/arch/powerpc/platforms/pseries/rng.c
index 6268545947b8..6ddfdeaace9e 100644
--- a/arch/powerpc/platforms/pseries/rng.c
+++ b/arch/powerpc/platforms/pseries/rng.c
@@ -10,6 +10,7 @@
#include <asm/archrandom.h>
#include <asm/machdep.h>
#include <asm/plpar_wrappers.h>
+#include "pseries.h"
static int pseries_get_random_long(unsigned long *v)
@@ -24,19 +25,13 @@ static int pseries_get_random_long(unsigned long *v)
return 0;
}
-static __init int rng_init(void)
+void __init pseries_rng_init(void)
{
struct device_node *dn;
dn = of_find_compatible_node(NULL, NULL, "ibm,random");
if (!dn)
- return -ENODEV;
-
- pr_info("Registering arch random hook.\n");
-
+ return;
ppc_md.get_random_seed = pseries_get_random_long;
-
of_node_put(dn);
- return 0;
}
-machine_subsys_initcall(pseries, rng_init);
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c
index afb074269b42..ee4f1db49515 100644
--- a/arch/powerpc/platforms/pseries/setup.c
+++ b/arch/powerpc/platforms/pseries/setup.c
@@ -839,6 +839,7 @@ static void __init pSeries_setup_arch(void)
}
ppc_md.pcibios_root_bridge_prepare = pseries_root_bridge_prepare;
+ pseries_rng_init();
}
static void pseries_panic(char *str)
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