Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 updates from Will Deacon:

 - vDSO build improvements including support for building with BSD.

 - Cleanup to the AMU support code and initialisation rework to support
   cpufreq drivers built as modules.

 - Removal of synthetic frame record from exception stack when entering
   the kernel from EL0.

 - Add support for the TRNG firmware call introduced by Arm spec
   DEN0098.

 - Cleanup and refactoring across the board.

 - Avoid calling arch_get_random_seed_long() from
   add_interrupt_randomness()

 - Perf and PMU updates including support for Cortex-A78 and the v8.3
   SPE extensions.

 - Significant steps along the road to leaving the MMU enabled during
   kexec relocation.

 - Faultaround changes to initialise prefaulted PTEs as 'old' when
   hardware access-flag updates are supported, which drastically
   improves vmscan performance.

 - CPU errata updates for Cortex-A76 (#1463225) and Cortex-A55
   (#1024718)

 - Preparatory work for yielding the vector unit at a finer granularity
   in the crypto code, which in turn will one day allow us to defer
   softirq processing when it is in use.

 - Support for overriding CPU ID register fields on the command-line.

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (85 commits)
  drivers/perf: Replace spin_lock_irqsave to spin_lock
  mm: filemap: Fix microblaze build failure with 'mmu_defconfig'
  arm64: Make CPU_BIG_ENDIAN depend on ld.bfd or ld.lld 13.0.0+
  arm64: cpufeatures: Allow disabling of Pointer Auth from the command-line
  arm64: Defer enabling pointer authentication on boot core
  arm64: cpufeatures: Allow disabling of BTI from the command-line
  arm64: Move "nokaslr" over to the early cpufeature infrastructure
  KVM: arm64: Document HVC_VHE_RESTART stub hypercall
  arm64: Make kvm-arm.mode={nvhe, protected} an alias of id_aa64mmfr1.vh=0
  arm64: Add an aliasing facility for the idreg override
  arm64: Honor VHE being disabled from the command-line
  arm64: Allow ID_AA64MMFR1_EL1.VH to be overridden from the command line
  arm64: cpufeature: Add an early command-line cpufeature override facility
  arm64: Extract early FDT mapping from kaslr_early_init()
  arm64: cpufeature: Use IDreg override in __read_sysreg_by_encoding()
  arm64: cpufeature: Add global feature override facility
  arm64: Move SCTLR_EL1 initialisation to EL-agnostic code
  arm64: Simplify init_el2_state to be non-VHE only
  arm64: Move VHE-specific SPE setup to mutate_to_vhe()
  arm64: Drop early setting of MDSCR_EL2.TPMS
  ...

15 files changed, 60 insertions, 58 deletions

diff --git a/drivers/char/random.c b/drivers/char/random.c
index 5f3b8ac9d97b..84e24986a97a 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1261,8 +1261,6 @@ void add_interrupt_randomness(int irq, int irq_flags)
 	cycles_t		cycles = random_get_entropy();
 	__u32			c_high, j_high;
 	__u64			ip;
-	unsigned long		seed;
-	int			credit = 0;
 
 	if (cycles == 0)
 		cycles = get_reg(fast_pool, regs);
@@ -1298,23 +1296,12 @@ void add_interrupt_randomness(int irq, int irq_flags)
 
 	fast_pool->last = now;
 	__mix_pool_bytes(r, &fast_pool->pool, sizeof(fast_pool->pool));
-
-	/*
-	 * If we have architectural seed generator, produce a seed and
-	 * add it to the pool.  For the sake of paranoia don't let the
-	 * architectural seed generator dominate the input from the
-	 * interrupt noise.
-	 */
-	if (arch_get_random_seed_long(&seed)) {
-		__mix_pool_bytes(r, &seed, sizeof(seed));
-		credit = 1;
-	}
 	spin_unlock(&r->lock);
 
 	fast_pool->count = 0;
 
 	/* award one bit for the contents of the fast pool */
-	credit_entropy_bits(r, credit + 1);
+	credit_entropy_bits(r, 1);
 }
 EXPORT_SYMBOL_GPL(add_interrupt_randomness);
 
diff --git a/drivers/firmware/smccc/smccc.c b/drivers/firmware/smccc/smccc.c
index 00c88b809c0c..d52bfc5ed5e4 100644
--- a/drivers/firmware/smccc/smccc.c
+++ b/drivers/firmware/smccc/smccc.c
@@ -5,16 +5,22 @@
 
 #define pr_fmt(fmt) "smccc: " fmt
 
+#include <linux/cache.h>
 #include <linux/init.h>
 #include <linux/arm-smccc.h>
+#include <asm/archrandom.h>
 
 static u32 smccc_version = ARM_SMCCC_VERSION_1_0;
 static enum arm_smccc_conduit smccc_conduit = SMCCC_CONDUIT_NONE;
 
+bool __ro_after_init smccc_trng_available = false;
+
 void __init arm_smccc_version_init(u32 version, enum arm_smccc_conduit conduit)
 {
 	smccc_version = version;
 	smccc_conduit = conduit;
+
+	smccc_trng_available = smccc_probe_trng();
 }
 
 enum arm_smccc_conduit arm_smccc_1_1_get_conduit(void)
diff --git a/drivers/perf/arm-cci.c b/drivers/perf/arm-cci.c
index 87c4be9dd412..f81e2ec90005 100644
--- a/drivers/perf/arm-cci.c
+++ b/drivers/perf/arm-cci.c
@@ -1026,12 +1026,11 @@ static void pmu_event_set_period(struct perf_event *event)
 
 static irqreturn_t pmu_handle_irq(int irq_num, void *dev)
 {
-	unsigned long flags;
 	struct cci_pmu *cci_pmu = dev;
 	struct cci_pmu_hw_events *events = &cci_pmu->hw_events;
 	int idx, handled = IRQ_NONE;
 
-	raw_spin_lock_irqsave(&events->pmu_lock, flags);
+	raw_spin_lock(&events->pmu_lock);
 
 	/* Disable the PMU while we walk through the counters */
 	__cci_pmu_disable(cci_pmu);
@@ -1061,7 +1060,7 @@ static irqreturn_t pmu_handle_irq(int irq_num, void *dev)
 
 	/* Enable the PMU and sync possibly overflowed counters */
 	__cci_pmu_enable_sync(cci_pmu);
-	raw_spin_unlock_irqrestore(&events->pmu_lock, flags);
+	raw_spin_unlock(&events->pmu_lock);
 
 	return IRQ_RETVAL(handled);
 }
@@ -1376,7 +1375,7 @@ static struct attribute *pmu_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group pmu_attr_group = {
+static const struct attribute_group pmu_attr_group = {
 	.attrs = pmu_attrs,
 };
 
diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c
index a76ff594f3ca..1328159fe564 100644
--- a/drivers/perf/arm-cmn.c
+++ b/drivers/perf/arm-cmn.c
@@ -616,7 +616,7 @@ static struct attribute *arm_cmn_cpumask_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group arm_cmn_cpumask_attr_group = {
+static const struct attribute_group arm_cmn_cpumask_attr_group = {
 	.attrs = arm_cmn_cpumask_attrs,
 };
 
@@ -1150,7 +1150,7 @@ static int arm_cmn_commit_txn(struct pmu *pmu)
 static int arm_cmn_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
 {
 	struct arm_cmn *cmn;
-	unsigned int target;
+	unsigned int i, target;
 
 	cmn = hlist_entry_safe(node, struct arm_cmn, cpuhp_node);
 	if (cpu != cmn->cpu)
@@ -1161,6 +1161,8 @@ static int arm_cmn_pmu_offline_cpu(unsigned int cpu, struct hlist_node *node)
 		return 0;
 
 	perf_pmu_migrate_context(&cmn->pmu, cpu, target);
+	for (i = 0; i < cmn->num_dtcs; i++)
+		irq_set_affinity_hint(cmn->dtc[i].irq, cpumask_of(target));
 	cmn->cpu = target;
 	return 0;
 }
@@ -1502,7 +1504,7 @@ static int arm_cmn_probe(struct platform_device *pdev)
 	struct arm_cmn *cmn;
 	const char *name;
 	static atomic_t id;
-	int err, rootnode, this_id;
+	int err, rootnode;
 
 	cmn = devm_kzalloc(&pdev->dev, sizeof(*cmn), GFP_KERNEL);
 	if (!cmn)
@@ -1549,14 +1551,9 @@ static int arm_cmn_probe(struct platform_device *pdev)
 		.cancel_txn = arm_cmn_end_txn,
 	};
 
-	this_id = atomic_fetch_inc(&id);
-	if (this_id == 0) {
-		name = "arm_cmn";
-	} else {
-		name = devm_kasprintf(cmn->dev, GFP_KERNEL, "arm_cmn_%d", this_id);
-		if (!name)
-			return -ENOMEM;
-	}
+	name = devm_kasprintf(cmn->dev, GFP_KERNEL, "arm_cmn_%d", atomic_fetch_inc(&id));
+	if (!name)
+		return -ENOMEM;
 
 	err = cpuhp_state_add_instance(arm_cmn_hp_state, &cmn->cpuhp_node);
 	if (err)
diff --git a/drivers/perf/arm_dmc620_pmu.c b/drivers/perf/arm_dmc620_pmu.c
index 004930eb4bbb..66ad5b3ece19 100644
--- a/drivers/perf/arm_dmc620_pmu.c
+++ b/drivers/perf/arm_dmc620_pmu.c
@@ -159,7 +159,7 @@ static struct attribute *dmc620_pmu_events_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group dmc620_pmu_events_attr_group = {
+static const struct attribute_group dmc620_pmu_events_attr_group = {
 	.name = "events",
 	.attrs = dmc620_pmu_events_attrs,
 };
@@ -222,7 +222,7 @@ static struct attribute *dmc620_pmu_formats_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group dmc620_pmu_format_attr_group = {
+static const struct attribute_group dmc620_pmu_format_attr_group = {
 	.name	= "format",
 	.attrs	= dmc620_pmu_formats_attrs,
 };
@@ -717,6 +717,7 @@ static struct platform_driver dmc620_pmu_driver = {
 	.driver	= {
 		.name		= DMC620_DRVNAME,
 		.acpi_match_table = dmc620_acpi_match,
+		.suppress_bind_attrs = true,
 	},
 	.probe	= dmc620_pmu_device_probe,
 	.remove	= dmc620_pmu_device_remove,
diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c
index cb2f55f450e4..2d10d84fb79c 100644
--- a/drivers/perf/arm_pmu.c
+++ b/drivers/perf/arm_pmu.c
@@ -577,7 +577,7 @@ static struct attribute *armpmu_common_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group armpmu_common_attr_group = {
+static const struct attribute_group armpmu_common_attr_group = {
 	.attrs = armpmu_common_attrs,
 };
 
diff --git a/drivers/perf/arm_smmuv3_pmu.c b/drivers/perf/arm_smmuv3_pmu.c
index 74474bb322c3..8ff7a67f691c 100644
--- a/drivers/perf/arm_smmuv3_pmu.c
+++ b/drivers/perf/arm_smmuv3_pmu.c
@@ -493,7 +493,7 @@ static struct attribute *smmu_pmu_cpumask_attrs[] = {
 	NULL
 };
 
-static struct attribute_group smmu_pmu_cpumask_group = {
+static const struct attribute_group smmu_pmu_cpumask_group = {
 	.attrs = smmu_pmu_cpumask_attrs,
 };
 
@@ -548,7 +548,7 @@ static umode_t smmu_pmu_event_is_visible(struct kobject *kobj,
 	return 0;
 }
 
-static struct attribute_group smmu_pmu_events_group = {
+static const struct attribute_group smmu_pmu_events_group = {
 	.name = "events",
 	.attrs = smmu_pmu_events,
 	.is_visible = smmu_pmu_event_is_visible,
@@ -583,7 +583,7 @@ static struct attribute *smmu_pmu_identifier_attrs[] = {
 	NULL
 };
 
-static struct attribute_group smmu_pmu_identifier_group = {
+static const struct attribute_group smmu_pmu_identifier_group = {
 	.attrs = smmu_pmu_identifier_attrs,
 	.is_visible = smmu_pmu_identifier_attr_visible,
 };
@@ -602,7 +602,7 @@ static struct attribute *smmu_pmu_formats[] = {
 	NULL
 };
 
-static struct attribute_group smmu_pmu_format_group = {
+static const struct attribute_group smmu_pmu_format_group = {
 	.name = "format",
 	.attrs = smmu_pmu_formats,
 };
diff --git a/drivers/perf/arm_spe_pmu.c b/drivers/perf/arm_spe_pmu.c
index cc00915ad6d1..d3929ccebfd2 100644
--- a/drivers/perf/arm_spe_pmu.c
+++ b/drivers/perf/arm_spe_pmu.c
@@ -54,7 +54,7 @@ struct arm_spe_pmu {
 	struct hlist_node			hotplug_node;
 
 	int					irq; /* PPI */
-
+	u16					pmsver;
 	u16					min_period;
 	u16					counter_sz;
 
@@ -146,7 +146,7 @@ static struct attribute *arm_spe_pmu_cap_attr[] = {
 	NULL,
 };
 
-static struct attribute_group arm_spe_pmu_cap_group = {
+static const struct attribute_group arm_spe_pmu_cap_group = {
 	.name	= "caps",
 	.attrs	= arm_spe_pmu_cap_attr,
 };
@@ -227,7 +227,7 @@ static struct attribute *arm_spe_pmu_formats_attr[] = {
 	NULL,
 };
 
-static struct attribute_group arm_spe_pmu_format_group = {
+static const struct attribute_group arm_spe_pmu_format_group = {
 	.name	= "format",
 	.attrs	= arm_spe_pmu_formats_attr,
 };
@@ -247,7 +247,7 @@ static struct attribute *arm_spe_pmu_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group arm_spe_pmu_group = {
+static const struct attribute_group arm_spe_pmu_group = {
 	.attrs	= arm_spe_pmu_attrs,
 };
 
@@ -655,6 +655,18 @@ static irqreturn_t arm_spe_pmu_irq_handler(int irq, void *dev)
 	return IRQ_HANDLED;
 }
 
+static u64 arm_spe_pmsevfr_res0(u16 pmsver)
+{
+	switch (pmsver) {
+	case ID_AA64DFR0_PMSVER_8_2:
+		return SYS_PMSEVFR_EL1_RES0_8_2;
+	case ID_AA64DFR0_PMSVER_8_3:
+	/* Return the highest version we support in default */
+	default:
+		return SYS_PMSEVFR_EL1_RES0_8_3;
+	}
+}
+
 /* Perf callbacks */
 static int arm_spe_pmu_event_init(struct perf_event *event)
 {
@@ -670,7 +682,7 @@ static int arm_spe_pmu_event_init(struct perf_event *event)
 	    !cpumask_test_cpu(event->cpu, &spe_pmu->supported_cpus))
 		return -ENOENT;
 
-	if (arm_spe_event_to_pmsevfr(event) & SYS_PMSEVFR_EL1_RES0)
+	if (arm_spe_event_to_pmsevfr(event) & arm_spe_pmsevfr_res0(spe_pmu->pmsver))
 		return -EOPNOTSUPP;
 
 	if (attr->exclude_idle)
@@ -937,6 +949,7 @@ static void __arm_spe_pmu_dev_probe(void *info)
 			fld, smp_processor_id());
 		return;
 	}
+	spe_pmu->pmsver = (u16)fld;
 
 	/* Read PMBIDR first to determine whether or not we have access */
 	reg = read_sysreg_s(SYS_PMBIDR_EL1);
diff --git a/drivers/perf/fsl_imx8_ddr_perf.c b/drivers/perf/fsl_imx8_ddr_perf.c
index a11bfd8a0823..be1f26b62ddb 100644
--- a/drivers/perf/fsl_imx8_ddr_perf.c
+++ b/drivers/perf/fsl_imx8_ddr_perf.c
@@ -133,7 +133,7 @@ static struct attribute *ddr_perf_identifier_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group ddr_perf_identifier_attr_group = {
+static const struct attribute_group ddr_perf_identifier_attr_group = {
 	.attrs = ddr_perf_identifier_attrs,
 	.is_visible = ddr_perf_identifier_attr_visible,
 };
@@ -188,7 +188,7 @@ static struct attribute *ddr_perf_filter_cap_attr[] = {
 	NULL,
 };
 
-static struct attribute_group ddr_perf_filter_cap_attr_group = {
+static const struct attribute_group ddr_perf_filter_cap_attr_group = {
 	.name = "caps",
 	.attrs = ddr_perf_filter_cap_attr,
 };
@@ -209,7 +209,7 @@ static struct attribute *ddr_perf_cpumask_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group ddr_perf_cpumask_attr_group = {
+static const struct attribute_group ddr_perf_cpumask_attr_group = {
 	.attrs = ddr_perf_cpumask_attrs,
 };
 
@@ -265,7 +265,7 @@ static struct attribute *ddr_perf_events_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group ddr_perf_events_attr_group = {
+static const struct attribute_group ddr_perf_events_attr_group = {
 	.name = "events",
 	.attrs = ddr_perf_events_attrs,
 };
@@ -281,7 +281,7 @@ static struct attribute *ddr_perf_format_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group ddr_perf_format_attr_group = {
+static const struct attribute_group ddr_perf_format_attr_group = {
 	.name = "format",
 	.attrs = ddr_perf_format_attrs,
 };
diff --git a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
index 5ac6c9113767..ac1a8c120a00 100644
--- a/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_ddrc_pmu.c
@@ -319,7 +319,7 @@ static struct attribute *hisi_ddrc_pmu_identifier_attrs[] = {
 	NULL
 };
 
-static struct attribute_group hisi_ddrc_pmu_identifier_group = {
+static const struct attribute_group hisi_ddrc_pmu_identifier_group = {
 	.attrs = hisi_ddrc_pmu_identifier_attrs,
 };
 
diff --git a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
index 41b2dceb5f26..3402f1a395a8 100644
--- a/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_hha_pmu.c
@@ -331,7 +331,7 @@ static struct attribute *hisi_hha_pmu_identifier_attrs[] = {
 	NULL
 };
 
-static struct attribute_group hisi_hha_pmu_identifier_group = {
+static const struct attribute_group hisi_hha_pmu_identifier_group = {
 	.attrs = hisi_hha_pmu_identifier_attrs,
 };
 
diff --git a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
index 705501d18d03..7d792435c2aa 100644
--- a/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
+++ b/drivers/perf/hisilicon/hisi_uncore_l3c_pmu.c
@@ -321,7 +321,7 @@ static struct attribute *hisi_l3c_pmu_identifier_attrs[] = {
 	NULL
 };
 
-static struct attribute_group hisi_l3c_pmu_identifier_group = {
+static const struct attribute_group hisi_l3c_pmu_identifier_group = {
 	.attrs = hisi_l3c_pmu_identifier_attrs,
 };
 
diff --git a/drivers/perf/qcom_l2_pmu.c b/drivers/perf/qcom_l2_pmu.c
index 23a0e008dafa..8883af955a2a 100644
--- a/drivers/perf/qcom_l2_pmu.c
+++ b/drivers/perf/qcom_l2_pmu.c
@@ -649,7 +649,7 @@ static struct attribute *l2_cache_pmu_cpumask_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group l2_cache_pmu_cpumask_group = {
+static const struct attribute_group l2_cache_pmu_cpumask_group = {
 	.attrs = l2_cache_pmu_cpumask_attrs,
 };
 
@@ -665,7 +665,7 @@ static struct attribute *l2_cache_pmu_formats[] = {
 	NULL,
 };
 
-static struct attribute_group l2_cache_pmu_format_group = {
+static const struct attribute_group l2_cache_pmu_format_group = {
 	.name = "format",
 	.attrs = l2_cache_pmu_formats,
 };
@@ -700,7 +700,7 @@ static struct attribute *l2_cache_pmu_events[] = {
 	NULL
 };
 
-static struct attribute_group l2_cache_pmu_events_group = {
+static const struct attribute_group l2_cache_pmu_events_group = {
 	.name = "events",
 	.attrs = l2_cache_pmu_events,
 };
diff --git a/drivers/perf/qcom_l3_pmu.c b/drivers/perf/qcom_l3_pmu.c
index 9ddb577c542b..fb34b87b9471 100644
--- a/drivers/perf/qcom_l3_pmu.c
+++ b/drivers/perf/qcom_l3_pmu.c
@@ -630,7 +630,7 @@ static struct attribute *qcom_l3_cache_pmu_formats[] = {
 	NULL,
 };
 
-static struct attribute_group qcom_l3_cache_pmu_format_group = {
+static const struct attribute_group qcom_l3_cache_pmu_format_group = {
 	.name = "format",
 	.attrs = qcom_l3_cache_pmu_formats,
 };
@@ -663,7 +663,7 @@ static struct attribute *qcom_l3_cache_pmu_events[] = {
 	NULL
 };
 
-static struct attribute_group qcom_l3_cache_pmu_events_group = {
+static const struct attribute_group qcom_l3_cache_pmu_events_group = {
 	.name = "events",
 	.attrs = qcom_l3_cache_pmu_events,
 };
@@ -685,7 +685,7 @@ static struct attribute *qcom_l3_cache_pmu_cpumask_attrs[] = {
 	NULL,
 };
 
-static struct attribute_group qcom_l3_cache_pmu_cpumask_attr_group = {
+static const struct attribute_group qcom_l3_cache_pmu_cpumask_attr_group = {
 	.attrs = qcom_l3_cache_pmu_cpumask_attrs,
 };
 
diff --git a/drivers/perf/xgene_pmu.c b/drivers/perf/xgene_pmu.c
index 633cf07ba672..44faa51ba799 100644
--- a/drivers/perf/xgene_pmu.c
+++ b/drivers/perf/xgene_pmu.c
@@ -1234,10 +1234,9 @@ static irqreturn_t xgene_pmu_isr(int irq, void *dev_id)
 	u32 intr_mcu, intr_mcb, intr_l3c, intr_iob;
 	struct xgene_pmu_dev_ctx *ctx;
 	struct xgene_pmu *xgene_pmu = dev_id;
-	unsigned long flags;
 	u32 val;
 
-	raw_spin_lock_irqsave(&xgene_pmu->lock, flags);
+	raw_spin_lock(&xgene_pmu->lock);
 
 	/* Get Interrupt PMU source */
 	val = readl(xgene_pmu->pcppmu_csr + PCPPMU_INTSTATUS_REG);
@@ -1273,7 +1272,7 @@ static irqreturn_t xgene_pmu_isr(int irq, void *dev_id)
 		}
 	}
 
-	raw_spin_unlock_irqrestore(&xgene_pmu->lock, flags);
+	raw_spin_unlock(&xgene_pmu->lock);
 
 	return IRQ_HANDLED;
 }