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Date: Tue, 17 May 2011 23:43:32 +0200
From: Ingo Molnar <mingo@...e.hu>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
"H. Peter Anvin" <hpa@...or.com>,
Andrew Morton <akpm@...ux-foundation.org>
Subject: [GIT PULL] x86 fixes
Linus,
Please pull the latest x86-fixes-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git x86-fixes-for-linus
Most of the diffstat is due to the two UV fixes, which do not affect other
machines.
Thanks,
Ingo
------------------>
Borislav Petkov (2):
Revert "x86, AMD: Fix APIC timer erratum 400 affecting K8 Rev.A-E processors"
x86, AMD: Fix ARAT feature setting again
Cliff Wickman (1):
x86: Fix UV BAU for non-consecutive nasids
Jack Steiner (1):
x86, UV: Fix NMI handler for UV platforms
Julia Lawall (1):
x86, mce, AMD: Fix leaving freed data in a list
Youquan Song (1):
x86, apic: Fix spurious error interrupts triggering on all non-boot APs
arch/x86/include/asm/apicdef.h | 1 +
arch/x86/include/asm/uv/uv_bau.h | 17 ++++-
arch/x86/include/asm/uv/uv_hub.h | 2 +
arch/x86/include/asm/uv/uv_mmrs.h | 16 +++++-
arch/x86/kernel/apic/x2apic_uv_x.c | 48 ++++++++++++++--
arch/x86/kernel/cpu/amd.c | 4 +-
arch/x86/kernel/cpu/mcheck/mce_amd.c | 1 +
arch/x86/kernel/cpu/mcheck/therm_throt.c | 12 ++--
arch/x86/platform/uv/tlb_uv.c | 92 ++++++++++++++++++++---------
9 files changed, 147 insertions(+), 46 deletions(-)
diff --git a/arch/x86/include/asm/apicdef.h b/arch/x86/include/asm/apicdef.h
index d87988b..34595d5 100644
--- a/arch/x86/include/asm/apicdef.h
+++ b/arch/x86/include/asm/apicdef.h
@@ -78,6 +78,7 @@
#define APIC_DEST_LOGICAL 0x00800
#define APIC_DEST_PHYSICAL 0x00000
#define APIC_DM_FIXED 0x00000
+#define APIC_DM_FIXED_MASK 0x00700
#define APIC_DM_LOWEST 0x00100
#define APIC_DM_SMI 0x00200
#define APIC_DM_REMRD 0x00300
diff --git a/arch/x86/include/asm/uv/uv_bau.h b/arch/x86/include/asm/uv/uv_bau.h
index 3e094af..130f1ee 100644
--- a/arch/x86/include/asm/uv/uv_bau.h
+++ b/arch/x86/include/asm/uv/uv_bau.h
@@ -94,6 +94,8 @@
/* after this # consecutive successes, bump up the throttle if it was lowered */
#define COMPLETE_THRESHOLD 5
+#define UV_LB_SUBNODEID 0x10
+
/*
* number of entries in the destination side payload queue
*/
@@ -124,7 +126,7 @@
* The distribution specification (32 bytes) is interpreted as a 256-bit
* distribution vector. Adjacent bits correspond to consecutive even numbered
* nodeIDs. The result of adding the index of a given bit to the 15-bit
- * 'base_dest_nodeid' field of the header corresponds to the
+ * 'base_dest_nasid' field of the header corresponds to the
* destination nodeID associated with that specified bit.
*/
struct bau_target_uvhubmask {
@@ -176,7 +178,7 @@ struct bau_msg_payload {
struct bau_msg_header {
unsigned int dest_subnodeid:6; /* must be 0x10, for the LB */
/* bits 5:0 */
- unsigned int base_dest_nodeid:15; /* nasid of the */
+ unsigned int base_dest_nasid:15; /* nasid of the */
/* bits 20:6 */ /* first bit in uvhub map */
unsigned int command:8; /* message type */
/* bits 28:21 */
@@ -378,6 +380,10 @@ struct ptc_stats {
unsigned long d_rcanceled; /* number of messages canceled by resets */
};
+struct hub_and_pnode {
+ short uvhub;
+ short pnode;
+};
/*
* one per-cpu; to locate the software tables
*/
@@ -399,10 +405,12 @@ struct bau_control {
int baudisabled;
int set_bau_off;
short cpu;
+ short osnode;
short uvhub_cpu;
short uvhub;
short cpus_in_socket;
short cpus_in_uvhub;
+ short partition_base_pnode;
unsigned short message_number;
unsigned short uvhub_quiesce;
short socket_acknowledge_count[DEST_Q_SIZE];
@@ -422,15 +430,16 @@ struct bau_control {
int congested_period;
cycles_t period_time;
long period_requests;
+ struct hub_and_pnode *target_hub_and_pnode;
};
static inline int bau_uvhub_isset(int uvhub, struct bau_target_uvhubmask *dstp)
{
return constant_test_bit(uvhub, &dstp->bits[0]);
}
-static inline void bau_uvhub_set(int uvhub, struct bau_target_uvhubmask *dstp)
+static inline void bau_uvhub_set(int pnode, struct bau_target_uvhubmask *dstp)
{
- __set_bit(uvhub, &dstp->bits[0]);
+ __set_bit(pnode, &dstp->bits[0]);
}
static inline void bau_uvhubs_clear(struct bau_target_uvhubmask *dstp,
int nbits)
diff --git a/arch/x86/include/asm/uv/uv_hub.h b/arch/x86/include/asm/uv/uv_hub.h
index a501741..4298002 100644
--- a/arch/x86/include/asm/uv/uv_hub.h
+++ b/arch/x86/include/asm/uv/uv_hub.h
@@ -398,6 +398,8 @@ struct uv_blade_info {
unsigned short nr_online_cpus;
unsigned short pnode;
short memory_nid;
+ spinlock_t nmi_lock;
+ unsigned long nmi_count;
};
extern struct uv_blade_info *uv_blade_info;
extern short *uv_node_to_blade;
diff --git a/arch/x86/include/asm/uv/uv_mmrs.h b/arch/x86/include/asm/uv/uv_mmrs.h
index 20cafea..f5bb64a 100644
--- a/arch/x86/include/asm/uv/uv_mmrs.h
+++ b/arch/x86/include/asm/uv/uv_mmrs.h
@@ -5,7 +5,7 @@
*
* SGI UV MMR definitions
*
- * Copyright (C) 2007-2010 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2007-2011 Silicon Graphics, Inc. All rights reserved.
*/
#ifndef _ASM_X86_UV_UV_MMRS_H
@@ -1099,5 +1099,19 @@ union uvh_rtc1_int_config_u {
} s;
};
+/* ========================================================================= */
+/* UVH_SCRATCH5 */
+/* ========================================================================= */
+#define UVH_SCRATCH5 0x2d0200UL
+#define UVH_SCRATCH5_32 0x00778
+
+#define UVH_SCRATCH5_SCRATCH5_SHFT 0
+#define UVH_SCRATCH5_SCRATCH5_MASK 0xffffffffffffffffUL
+union uvh_scratch5_u {
+ unsigned long v;
+ struct uvh_scratch5_s {
+ unsigned long scratch5 : 64; /* RW, W1CS */
+ } s;
+};
#endif /* __ASM_UV_MMRS_X86_H__ */
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 33b10a0..7acd2d2 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -37,6 +37,13 @@
#include <asm/smp.h>
#include <asm/x86_init.h>
#include <asm/emergency-restart.h>
+#include <asm/nmi.h>
+
+/* BMC sets a bit this MMR non-zero before sending an NMI */
+#define UVH_NMI_MMR UVH_SCRATCH5
+#define UVH_NMI_MMR_CLEAR (UVH_NMI_MMR + 8)
+#define UV_NMI_PENDING_MASK (1UL << 63)
+DEFINE_PER_CPU(unsigned long, cpu_last_nmi_count);
DEFINE_PER_CPU(int, x2apic_extra_bits);
@@ -642,18 +649,46 @@ void __cpuinit uv_cpu_init(void)
*/
int uv_handle_nmi(struct notifier_block *self, unsigned long reason, void *data)
{
+ unsigned long real_uv_nmi;
+ int bid;
+
if (reason != DIE_NMIUNKNOWN)
return NOTIFY_OK;
if (in_crash_kexec)
/* do nothing if entering the crash kernel */
return NOTIFY_OK;
+
/*
- * Use a lock so only one cpu prints at a time
- * to prevent intermixed output.
+ * Each blade has an MMR that indicates when an NMI has been sent
+ * to cpus on the blade. If an NMI is detected, atomically
+ * clear the MMR and update a per-blade NMI count used to
+ * cause each cpu on the blade to notice a new NMI.
+ */
+ bid = uv_numa_blade_id();
+ real_uv_nmi = (uv_read_local_mmr(UVH_NMI_MMR) & UV_NMI_PENDING_MASK);
+
+ if (unlikely(real_uv_nmi)) {
+ spin_lock(&uv_blade_info[bid].nmi_lock);
+ real_uv_nmi = (uv_read_local_mmr(UVH_NMI_MMR) & UV_NMI_PENDING_MASK);
+ if (real_uv_nmi) {
+ uv_blade_info[bid].nmi_count++;
+ uv_write_local_mmr(UVH_NMI_MMR_CLEAR, UV_NMI_PENDING_MASK);
+ }
+ spin_unlock(&uv_blade_info[bid].nmi_lock);
+ }
+
+ if (likely(__get_cpu_var(cpu_last_nmi_count) == uv_blade_info[bid].nmi_count))
+ return NOTIFY_DONE;
+
+ __get_cpu_var(cpu_last_nmi_count) = uv_blade_info[bid].nmi_count;
+
+ /*
+ * Use a lock so only one cpu prints at a time.
+ * This prevents intermixed output.
*/
spin_lock(&uv_nmi_lock);
- pr_info("NMI stack dump cpu %u:\n", smp_processor_id());
+ pr_info("UV NMI stack dump cpu %u:\n", smp_processor_id());
dump_stack();
spin_unlock(&uv_nmi_lock);
@@ -661,7 +696,8 @@ int uv_handle_nmi(struct notifier_block *self, unsigned long reason, void *data)
}
static struct notifier_block uv_dump_stack_nmi_nb = {
- .notifier_call = uv_handle_nmi
+ .notifier_call = uv_handle_nmi,
+ .priority = NMI_LOCAL_LOW_PRIOR - 1,
};
void uv_register_nmi_notifier(void)
@@ -720,8 +756,9 @@ void __init uv_system_init(void)
printk(KERN_DEBUG "UV: Found %d blades\n", uv_num_possible_blades());
bytes = sizeof(struct uv_blade_info) * uv_num_possible_blades();
- uv_blade_info = kmalloc(bytes, GFP_KERNEL);
+ uv_blade_info = kzalloc(bytes, GFP_KERNEL);
BUG_ON(!uv_blade_info);
+
for (blade = 0; blade < uv_num_possible_blades(); blade++)
uv_blade_info[blade].memory_nid = -1;
@@ -747,6 +784,7 @@ void __init uv_system_init(void)
uv_blade_info[blade].pnode = pnode;
uv_blade_info[blade].nr_possible_cpus = 0;
uv_blade_info[blade].nr_online_cpus = 0;
+ spin_lock_init(&uv_blade_info[blade].nmi_lock);
max_pnode = max(pnode, max_pnode);
blade++;
}
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index bb9eb29..6f9d1f6 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -613,7 +613,7 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c)
#endif
/* As a rule processors have APIC timer running in deep C states */
- if (c->x86 >= 0xf && !cpu_has_amd_erratum(amd_erratum_400))
+ if (c->x86 > 0xf && !cpu_has_amd_erratum(amd_erratum_400))
set_cpu_cap(c, X86_FEATURE_ARAT);
/*
@@ -698,7 +698,7 @@ cpu_dev_register(amd_cpu_dev);
*/
const int amd_erratum_400[] =
- AMD_OSVW_ERRATUM(1, AMD_MODEL_RANGE(0x0f, 0x4, 0x2, 0xff, 0xf),
+ AMD_OSVW_ERRATUM(1, AMD_MODEL_RANGE(0xf, 0x41, 0x2, 0xff, 0xf),
AMD_MODEL_RANGE(0x10, 0x2, 0x1, 0xff, 0xf));
EXPORT_SYMBOL_GPL(amd_erratum_400);
diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c
index 167f97b..bb0adad 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
@@ -509,6 +509,7 @@ recurse:
out_free:
if (b) {
kobject_put(&b->kobj);
+ list_del(&b->miscj);
kfree(b);
}
return err;
diff --git a/arch/x86/kernel/cpu/mcheck/therm_throt.c b/arch/x86/kernel/cpu/mcheck/therm_throt.c
index 6f8c5e9..0f03446 100644
--- a/arch/x86/kernel/cpu/mcheck/therm_throt.c
+++ b/arch/x86/kernel/cpu/mcheck/therm_throt.c
@@ -446,18 +446,20 @@ void intel_init_thermal(struct cpuinfo_x86 *c)
*/
rdmsr(MSR_IA32_MISC_ENABLE, l, h);
+ h = lvtthmr_init;
/*
* The initial value of thermal LVT entries on all APs always reads
* 0x10000 because APs are woken up by BSP issuing INIT-SIPI-SIPI
* sequence to them and LVT registers are reset to 0s except for
* the mask bits which are set to 1s when APs receive INIT IPI.
- * Always restore the value that BIOS has programmed on AP based on
- * BSP's info we saved since BIOS is always setting the same value
- * for all threads/cores
+ * If BIOS takes over the thermal interrupt and sets its interrupt
+ * delivery mode to SMI (not fixed), it restores the value that the
+ * BIOS has programmed on AP based on BSP's info we saved since BIOS
+ * is always setting the same value for all threads/cores.
*/
- apic_write(APIC_LVTTHMR, lvtthmr_init);
+ if ((h & APIC_DM_FIXED_MASK) != APIC_DM_FIXED)
+ apic_write(APIC_LVTTHMR, lvtthmr_init);
- h = lvtthmr_init;
if ((l & MSR_IA32_MISC_ENABLE_TM1) && (h & APIC_DM_SMI)) {
printk(KERN_DEBUG
diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c
index 7cb6424..c58e0ea 100644
--- a/arch/x86/platform/uv/tlb_uv.c
+++ b/arch/x86/platform/uv/tlb_uv.c
@@ -699,16 +699,17 @@ const struct cpumask *uv_flush_tlb_others(const struct cpumask *cpumask,
struct mm_struct *mm,
unsigned long va, unsigned int cpu)
{
- int tcpu;
- int uvhub;
int locals = 0;
int remotes = 0;
int hubs = 0;
+ int tcpu;
+ int tpnode;
struct bau_desc *bau_desc;
struct cpumask *flush_mask;
struct ptc_stats *stat;
struct bau_control *bcp;
struct bau_control *tbcp;
+ struct hub_and_pnode *hpp;
/* kernel was booted 'nobau' */
if (nobau)
@@ -750,11 +751,18 @@ const struct cpumask *uv_flush_tlb_others(const struct cpumask *cpumask,
bau_desc += UV_ITEMS_PER_DESCRIPTOR * bcp->uvhub_cpu;
bau_uvhubs_clear(&bau_desc->distribution, UV_DISTRIBUTION_SIZE);
- /* cpu statistics */
for_each_cpu(tcpu, flush_mask) {
- uvhub = uv_cpu_to_blade_id(tcpu);
- bau_uvhub_set(uvhub, &bau_desc->distribution);
- if (uvhub == bcp->uvhub)
+ /*
+ * The distribution vector is a bit map of pnodes, relative
+ * to the partition base pnode (and the partition base nasid
+ * in the header).
+ * Translate cpu to pnode and hub using an array stored
+ * in local memory.
+ */
+ hpp = &bcp->socket_master->target_hub_and_pnode[tcpu];
+ tpnode = hpp->pnode - bcp->partition_base_pnode;
+ bau_uvhub_set(tpnode, &bau_desc->distribution);
+ if (hpp->uvhub == bcp->uvhub)
locals++;
else
remotes++;
@@ -855,7 +863,7 @@ void uv_bau_message_interrupt(struct pt_regs *regs)
* an interrupt, but causes an error message to be returned to
* the sender.
*/
-static void uv_enable_timeouts(void)
+static void __init uv_enable_timeouts(void)
{
int uvhub;
int nuvhubs;
@@ -1326,10 +1334,10 @@ static int __init uv_ptc_init(void)
}
/*
- * initialize the sending side's sending buffers
+ * Initialize the sending side's sending buffers.
*/
static void
-uv_activation_descriptor_init(int node, int pnode)
+uv_activation_descriptor_init(int node, int pnode, int base_pnode)
{
int i;
int cpu;
@@ -1352,11 +1360,11 @@ uv_activation_descriptor_init(int node, int pnode)
n = pa >> uv_nshift;
m = pa & uv_mmask;
+ /* the 14-bit pnode */
uv_write_global_mmr64(pnode, UVH_LB_BAU_SB_DESCRIPTOR_BASE,
(n << UV_DESC_BASE_PNODE_SHIFT | m));
-
/*
- * initializing all 8 (UV_ITEMS_PER_DESCRIPTOR) descriptors for each
+ * Initializing all 8 (UV_ITEMS_PER_DESCRIPTOR) descriptors for each
* cpu even though we only use the first one; one descriptor can
* describe a broadcast to 256 uv hubs.
*/
@@ -1365,12 +1373,13 @@ uv_activation_descriptor_init(int node, int pnode)
memset(bd2, 0, sizeof(struct bau_desc));
bd2->header.sw_ack_flag = 1;
/*
- * base_dest_nodeid is the nasid of the first uvhub
- * in the partition. The bit map will indicate uvhub numbers,
- * which are 0-N in a partition. Pnodes are unique system-wide.
+ * The base_dest_nasid set in the message header is the nasid
+ * of the first uvhub in the partition. The bit map will
+ * indicate destination pnode numbers relative to that base.
+ * They may not be consecutive if nasid striding is being used.
*/
- bd2->header.base_dest_nodeid = UV_PNODE_TO_NASID(uv_partition_base_pnode);
- bd2->header.dest_subnodeid = 0x10; /* the LB */
+ bd2->header.base_dest_nasid = UV_PNODE_TO_NASID(base_pnode);
+ bd2->header.dest_subnodeid = UV_LB_SUBNODEID;
bd2->header.command = UV_NET_ENDPOINT_INTD;
bd2->header.int_both = 1;
/*
@@ -1442,7 +1451,7 @@ uv_payload_queue_init(int node, int pnode)
/*
* Initialization of each UV hub's structures
*/
-static void __init uv_init_uvhub(int uvhub, int vector)
+static void __init uv_init_uvhub(int uvhub, int vector, int base_pnode)
{
int node;
int pnode;
@@ -1450,11 +1459,11 @@ static void __init uv_init_uvhub(int uvhub, int vector)
node = uvhub_to_first_node(uvhub);
pnode = uv_blade_to_pnode(uvhub);
- uv_activation_descriptor_init(node, pnode);
+ uv_activation_descriptor_init(node, pnode, base_pnode);
uv_payload_queue_init(node, pnode);
/*
- * the below initialization can't be in firmware because the
- * messaging IRQ will be determined by the OS
+ * The below initialization can't be in firmware because the
+ * messaging IRQ will be determined by the OS.
*/
apicid = uvhub_to_first_apicid(uvhub) | uv_apicid_hibits;
uv_write_global_mmr64(pnode, UVH_BAU_DATA_CONFIG,
@@ -1491,10 +1500,11 @@ calculate_destination_timeout(void)
/*
* initialize the bau_control structure for each cpu
*/
-static int __init uv_init_per_cpu(int nuvhubs)
+static int __init uv_init_per_cpu(int nuvhubs, int base_part_pnode)
{
int i;
int cpu;
+ int tcpu;
int pnode;
int uvhub;
int have_hmaster;
@@ -1528,6 +1538,15 @@ static int __init uv_init_per_cpu(int nuvhubs)
bcp = &per_cpu(bau_control, cpu);
memset(bcp, 0, sizeof(struct bau_control));
pnode = uv_cpu_hub_info(cpu)->pnode;
+ if ((pnode - base_part_pnode) >= UV_DISTRIBUTION_SIZE) {
+ printk(KERN_EMERG
+ "cpu %d pnode %d-%d beyond %d; BAU disabled\n",
+ cpu, pnode, base_part_pnode,
+ UV_DISTRIBUTION_SIZE);
+ return 1;
+ }
+ bcp->osnode = cpu_to_node(cpu);
+ bcp->partition_base_pnode = uv_partition_base_pnode;
uvhub = uv_cpu_hub_info(cpu)->numa_blade_id;
*(uvhub_mask + (uvhub/8)) |= (1 << (uvhub%8));
bdp = &uvhub_descs[uvhub];
@@ -1536,7 +1555,7 @@ static int __init uv_init_per_cpu(int nuvhubs)
bdp->pnode = pnode;
/* kludge: 'assuming' one node per socket, and assuming that
disabling a socket just leaves a gap in node numbers */
- socket = (cpu_to_node(cpu) & 1);
+ socket = bcp->osnode & 1;
bdp->socket_mask |= (1 << socket);
sdp = &bdp->socket[socket];
sdp->cpu_number[sdp->num_cpus] = cpu;
@@ -1585,6 +1604,20 @@ static int __init uv_init_per_cpu(int nuvhubs)
nextsocket:
socket++;
socket_mask = (socket_mask >> 1);
+ /* each socket gets a local array of pnodes/hubs */
+ bcp = smaster;
+ bcp->target_hub_and_pnode = kmalloc_node(
+ sizeof(struct hub_and_pnode) *
+ num_possible_cpus(), GFP_KERNEL, bcp->osnode);
+ memset(bcp->target_hub_and_pnode, 0,
+ sizeof(struct hub_and_pnode) *
+ num_possible_cpus());
+ for_each_present_cpu(tcpu) {
+ bcp->target_hub_and_pnode[tcpu].pnode =
+ uv_cpu_hub_info(tcpu)->pnode;
+ bcp->target_hub_and_pnode[tcpu].uvhub =
+ uv_cpu_hub_info(tcpu)->numa_blade_id;
+ }
}
}
kfree(uvhub_descs);
@@ -1637,21 +1670,22 @@ static int __init uv_bau_init(void)
spin_lock_init(&disable_lock);
congested_cycles = microsec_2_cycles(congested_response_us);
- if (uv_init_per_cpu(nuvhubs)) {
- nobau = 1;
- return 0;
- }
-
uv_partition_base_pnode = 0x7fffffff;
- for (uvhub = 0; uvhub < nuvhubs; uvhub++)
+ for (uvhub = 0; uvhub < nuvhubs; uvhub++) {
if (uv_blade_nr_possible_cpus(uvhub) &&
(uv_blade_to_pnode(uvhub) < uv_partition_base_pnode))
uv_partition_base_pnode = uv_blade_to_pnode(uvhub);
+ }
+
+ if (uv_init_per_cpu(nuvhubs, uv_partition_base_pnode)) {
+ nobau = 1;
+ return 0;
+ }
vector = UV_BAU_MESSAGE;
for_each_possible_blade(uvhub)
if (uv_blade_nr_possible_cpus(uvhub))
- uv_init_uvhub(uvhub, vector);
+ uv_init_uvhub(uvhub, vector, uv_partition_base_pnode);
uv_enable_timeouts();
alloc_intr_gate(vector, uv_bau_message_intr1);
--
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