[rocky8_10] History Rebuild for kernel-4.18.0-553.40.1.el8_10

Makefile.rhelver

@@ -12,7 +12,7 @@ RHEL_MINOR = 10
 #
 # Use this spot to avoid future merge conflicts.
 # Do not trim this comment.
-RHEL_RELEASE = 553.36.1
+RHEL_RELEASE = 553.40.1
 
 #
 # ZSTREAM

arch/arm64/kernel/fpsimd.c

@@ -975,6 +975,7 @@ void do_sve_acc(unsigned int esr, struct pt_regs *regs)
 		fpsimd_bind_task_to_cpu();
 	} else {
 		fpsimd_to_sve(current);
+		fpsimd_flush_task_state(current);
 	}
 
 	put_cpu_fpsimd_context();

arch/s390/include/asm/pci.h

@@ -108,9 +108,10 @@ struct zpci_bus {
 	struct list_head	resources;
 	struct list_head	bus_next;
 	struct resource		bus_resource;
-	int			pchid;
+	int			topo;		/* TID if topo_is_tid, PCHID otherwise */
 	int			domain_nr;
-	bool			multifunction;
+	u8			multifunction	: 1;
+	u8			topo_is_tid	: 1;
 	enum pci_bus_speed	max_bus_speed;
 };
 
@@ -129,6 +130,8 @@ struct zpci_dev {
 	u16		vfn;		/* virtual function number */
 	u16		pchid;		/* physical channel ID */
 	u16		maxstbl;	/* Maximum store block size */
+	u16		rid;		/* RID as supplied by firmware */
+	u16		tid;		/* Topology for which RID is valid */
 	u8		pfgid;		/* function group ID */
 	u8		pft;		/* pci function type */
 	u8		port;
@@ -139,7 +142,8 @@ struct zpci_dev {
 	u8		is_physfn	: 1;
 	u8		util_str_avail	: 1;
 	u8		irqs_registered	: 1;
-	u8		reserved	: 2;
+	u8		tid_avail	: 1;
+	u8		reserved	: 1;
 	unsigned int	devfn;		/* DEVFN part of the RID*/
 
 	struct mutex lock;
@@ -215,12 +219,14 @@ extern struct airq_iv *zpci_aif_sbv;
 ----------------------------------------------------------------------------- */
 /* Base stuff */
 struct zpci_dev *zpci_create_device(u32 fid, u32 fh, enum zpci_state state);
+int zpci_add_device(struct zpci_dev *zdev);
 int zpci_enable_device(struct zpci_dev *);
 int zpci_disable_device(struct zpci_dev *);
 int zpci_scan_configured_device(struct zpci_dev *zdev, u32 fh);
 int zpci_deconfigure_device(struct zpci_dev *zdev);
 void zpci_device_reserved(struct zpci_dev *zdev);
 bool zpci_is_device_configured(struct zpci_dev *zdev);
+int zpci_scan_devices(void);
 
 int zpci_hot_reset_device(struct zpci_dev *zdev);
 int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64, u8 *);
@@ -231,7 +237,7 @@ void zpci_update_fh(struct zpci_dev *zdev, u32 fh);
 /* CLP */
 int rhel8_clp_rescan_pci_devices_simple(void);
 int clp_setup_writeback_mio(void);
-int clp_scan_pci_devices(void);
+int clp_scan_pci_devices(struct list_head *scan_list);
 int clp_query_pci_fn(struct zpci_dev *zdev);
 int clp_enable_fh(struct zpci_dev *zdev, u32 *fh, u8 nr_dma_as);
 int clp_disable_fh(struct zpci_dev *zdev, u32 *fh);

arch/s390/include/asm/pci_clp.h

@@ -107,7 +107,8 @@ struct clp_req_query_pci {
 struct clp_rsp_query_pci {
 	struct clp_rsp_hdr hdr;
 	u16 vfn;			/* virtual fn number */
-	u16			:  3;
+	u16			:  2;
+	u16 tid_avail		:  1;
 	u16 rid_avail		:  1;
 	u16 is_physfn		:  1;
 	u16 reserved1		:  1;
@@ -127,8 +128,9 @@ struct clp_rsp_query_pci {
 	u64 edma;			/* end dma as */
 #define ZPCI_RID_MASK_DEVFN 0x00ff
 	u16 rid;			/* BUS/DEVFN PCI address */
-	u16 reserved0;
-	u32 reserved[10];
+	u32 reserved0;
+	u16 tid;
+	u32 reserved[9];
 	u32 uid;			/* user defined id */
 	u8 util_str[CLP_UTIL_STR_LEN];	/* utility string */
 	u32 reserved2[16];

arch/s390/pci/pci.c

@@ -27,6 +27,7 @@
 #include <linux/seq_file.h>
 #include <linux/jump_label.h>
 #include <linux/pci.h>
+#include <linux/list_sort.h>
 
 #include <asm/isc.h>
 #include <asm/airq.h>
@@ -859,8 +860,9 @@ int zpci_hot_reset_device(struct zpci_dev *zdev)
  * @fh: Current Function Handle of the device to be created
  * @state: Initial state after creation either Standby or Configured
  *
- * Creates a new zpci device and adds it to its, possibly newly created, zbus
- * as well as zpci_list.
+ * Allocates a new struct zpci_dev and queries the platform for its details.
+ * If successful the device can subsequently be added to the zPCI subsystem
+ * using zpci_add_device().
  *
  * Returns: the zdev on success or an error pointer otherwise
  */
@@ -869,7 +871,6 @@ struct zpci_dev *zpci_create_device(u32 fid, u32 fh, enum zpci_state state)
 	struct zpci_dev *zdev;
 	int rc;
 
-	zpci_dbg(1, "add fid:%x, fh:%x, c:%d\n", fid, fh, state);
 	zdev = kzalloc(sizeof(*zdev), GFP_KERNEL);
 	if (!zdev)
 		return ERR_PTR(-ENOMEM);
@@ -884,10 +885,33 @@ struct zpci_dev *zpci_create_device(u32 fid, u32 fh, enum zpci_state state)
 		goto error;
 	zdev->state =  state;
 
-	kref_init(&zdev->kref);
 	mutex_init(&zdev->lock);
 	mutex_init(&zdev->kzdev_lock);
 
+	return zdev;
+
+error:
+	zpci_dbg(0, "crt fid:%x, rc:%d\n", fid, rc);
+	kfree(zdev);
+	return ERR_PTR(rc);
+}
+
+/**
+ * zpci_add_device() - Add a previously created zPCI device to the zPCI subsystem
+ * @zdev: The zPCI device to be added
+ *
+ * A struct zpci_dev is added to the zPCI subsystem and to a virtual PCI bus creating
+ * a new one as necessary. A hotplug slot is created and events start to be handled.
+ * If successful from this point on zpci_zdev_get() and zpci_zdev_put() must be used.
+ * If adding the struct zpci_dev fails the device was not added and should be freed.
+ *
+ * Return: 0 on success, or an error code otherwise
+ */
+int zpci_add_device(struct zpci_dev *zdev)
+{
+	int rc;
+
+	zpci_dbg(1, "add fid:%x, fh:%x, c:%d\n", zdev->fid, zdev->fh, zdev->state);
 	rc = zpci_init_iommu(zdev);
 	if (rc)
 		goto error;
@@ -896,18 +920,17 @@ struct zpci_dev *zpci_create_device(u32 fid, u32 fh, enum zpci_state state)
 	if (rc)
 		goto error_destroy_iommu;
 
+	kref_init(&zdev->kref);
 	spin_lock(&zpci_list_lock);
 	list_add_tail(&zdev->entry, &zpci_list);
 	spin_unlock(&zpci_list_lock);
-
-	return zdev;
+	return 0;
 
 error_destroy_iommu:
 	zpci_destroy_iommu(zdev);
 error:
-	zpci_dbg(0, "add fid:%x, rc:%d\n", fid, rc);
-	kfree(zdev);
-	return ERR_PTR(rc);
+	zpci_dbg(0, "add fid:%x, rc:%d\n", zdev->fid, rc);
+	return rc;
 }
 
 bool zpci_is_device_configured(struct zpci_dev *zdev)
@@ -1168,6 +1191,50 @@ bool zpci_is_enabled(void)
 	return s390_pci_initialized;
 }
 
+static int zpci_cmp_rid(void *priv, struct list_head *a,
+			struct list_head *b)
+{
+	struct zpci_dev *za = container_of(a, struct zpci_dev, entry);
+	struct zpci_dev *zb = container_of(b, struct zpci_dev, entry);
+
+	/*
+	 * PCI functions without RID available maintain original order
+	 * between themselves but sort before those with RID.
+	 */
+	if (za->rid == zb->rid)
+		return za->rid_available > zb->rid_available;
+	/*
+	 * PCI functions with RID sort by RID ascending.
+	 */
+	return za->rid > zb->rid;
+}
+
+static void zpci_add_devices(struct list_head *scan_list)
+{
+	struct zpci_dev *zdev, *tmp;
+
+	list_sort(NULL, scan_list, &zpci_cmp_rid);
+	list_for_each_entry_safe(zdev, tmp, scan_list, entry) {
+		list_del_init(&zdev->entry);
+		if (zpci_add_device(zdev))
+			kfree(zdev);
+	}
+}
+
+int zpci_scan_devices(void)
+{
+	LIST_HEAD(scan_list);
+	int rc;
+
+	rc = clp_scan_pci_devices(&scan_list);
+	if (rc)
+		return rc;
+
+	zpci_add_devices(&scan_list);
+	zpci_bus_scan_busses();
+	return 0;
+}
+
 static int __init pci_base_init(void)
 {
 	int rc;
@@ -1201,10 +1268,9 @@ static int __init pci_base_init(void)
 	if (rc)
 		goto out_dma;
 
-	rc = clp_scan_pci_devices();
+	rc = zpci_scan_devices();
 	if (rc)
 		goto out_find;
-	zpci_bus_scan_busses();
 
 	s390_pci_initialized = 1;
 	return 0;

arch/s390/pci/pci_bus.c

@@ -173,9 +173,16 @@ void zpci_bus_scan_busses(void)
 	mutex_unlock(&zbus_list_lock);
 }
 
+static bool zpci_bus_is_multifunction_root(struct zpci_dev *zdev)
+{
+	return !s390_pci_no_rid && zdev->rid_available &&
+		zpci_is_device_configured(zdev) &&
+		!zdev->vfn;
+}
+
 /* zpci_bus_create_pci_bus - Create the PCI bus associated with this zbus
  * @zbus: the zbus holding the zdevices
- * @fr: PCI root function that will determine the bus's domain, and bus speeed
+ * @fr: PCI root function that will determine the bus's domain, and bus speed
  * @ops: the pci operations
  *
  * The PCI function @fr determines the domain (its UID), multifunction property
@@ -193,7 +200,7 @@ static int zpci_bus_create_pci_bus(struct zpci_bus *zbus, struct zpci_dev *fr, s
 		return domain;
 
 	zbus->domain_nr = domain;
-	zbus->multifunction = fr->rid_available;
+	zbus->multifunction = zpci_bus_is_multifunction_root(fr);
 	zbus->max_bus_speed = fr->max_bus_speed;
 
 	/*
@@ -237,13 +244,15 @@ static void zpci_bus_put(struct zpci_bus *zbus)
 	kref_put(&zbus->kref, zpci_bus_release);
 }
 
-static struct zpci_bus *zpci_bus_get(int pchid)
+static struct zpci_bus *zpci_bus_get(int topo, bool topo_is_tid)
 {
 	struct zpci_bus *zbus;
 
 	mutex_lock(&zbus_list_lock);
 	list_for_each_entry(zbus, &zbus_list, bus_next) {
-		if (pchid == zbus->pchid) {
+		if (!zbus->multifunction)
+			continue;
+		if (topo_is_tid == zbus->topo_is_tid && topo == zbus->topo) {
 			kref_get(&zbus->kref);
 			goto out_unlock;
 		}
@@ -254,15 +263,16 @@ static struct zpci_bus *zpci_bus_get(int pchid)
 	return zbus;
 }
 
-static struct zpci_bus *zpci_bus_alloc(int pchid)
+static struct zpci_bus *zpci_bus_alloc(int topo, bool topo_is_tid)
 {
 	struct zpci_bus *zbus;
 
 	zbus = kzalloc(sizeof(*zbus), GFP_KERNEL);
 	if (!zbus)
 		return NULL;
 
-	zbus->pchid = pchid;
+	zbus->topo = topo;
+	zbus->topo_is_tid = topo_is_tid;
 	INIT_LIST_HEAD(&zbus->bus_next);
 	mutex_lock(&zbus_list_lock);
 	list_add_tail(&zbus->bus_next, &zbus_list);
@@ -297,19 +307,22 @@ static int zpci_bus_add_device(struct zpci_bus *zbus, struct zpci_dev *zdev)
 {
 	int rc = -EINVAL;
 
+	if (zbus->multifunction) {
+		if (!zdev->rid_available) {
+			WARN_ONCE(1, "rid_available not set for multifunction\n");
+			return rc;
+		}
+		zdev->devfn = zdev->rid & ZPCI_RID_MASK_DEVFN;
+	}
+
 	if (zbus->function[zdev->devfn]) {
 		pr_err("devfn %04x is already assigned\n", zdev->devfn);
 		return rc;
 	}
-
 	zdev->zbus = zbus;
 	zbus->function[zdev->devfn] = zdev;
 	zpci_nb_devices++;
 
-	if (zbus->multifunction && !zdev->rid_available) {
-		WARN_ONCE(1, "rid_available not set for multifunction\n");
-		goto error;
-	}
 	rc = zpci_init_slot(zdev);
 	if (rc)
 		goto error;
@@ -326,23 +339,20 @@ static int zpci_bus_add_device(struct zpci_bus *zbus, struct zpci_dev *zdev)
 
 int zpci_bus_device_register(struct zpci_dev *zdev, struct pci_ops *ops)
 {
+	bool topo_is_tid = zdev->tid_avail;
 	struct zpci_bus *zbus = NULL;
-	int rc = -EBADF;
+	int topo, rc = -EBADF;
 
 	if (zpci_nb_devices == ZPCI_NR_DEVICES) {
 		pr_warn("Adding PCI function %08x failed because the configured limit of %d is reached\n",
 			zdev->fid, ZPCI_NR_DEVICES);
 		return -ENOSPC;
 	}
 
-	if (zdev->devfn >= ZPCI_FUNCTIONS_PER_BUS)
-		return -EINVAL;
-
-	if (!s390_pci_no_rid && zdev->rid_available)
-		zbus = zpci_bus_get(zdev->pchid);
-
+	topo = topo_is_tid ? zdev->tid : zdev->pchid;
+	zbus = zpci_bus_get(topo, topo_is_tid);
 	if (!zbus) {
-		zbus = zpci_bus_alloc(zdev->pchid);
+		zbus = zpci_bus_alloc(topo, topo_is_tid);
 		if (!zbus)
 			return -ENOMEM;
 	}