Merge tag 'perf-core-for-mingo-5.4-20190814' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo:

Intel PT:

  Adrian Hunter:

  - Add PEBS via Intel PT support, the kernel bits went via PeterZ.

perf record:

  Alexander Shishkin:

  - Add an option to take an AUX snapshot on exit.

  Tan Xiaojun:

  - Support aarch64 random socket_id assignment, just like was fixed for S/390.

tools:

  Andy Shevchenko:

  - Keep list of tools in alphabetical order on 'make -C tools help'.

perf session:

  Arnaldo Carvalho de Melo:

  - Avoid infinite loop when seeing invalid header.size, reported by
    Vince Weaver using a perf.data fuzzer.

Documentation:

  Vince Weaver:

  - Clarify HEADER_SAMPLE_TOPOLOGY format in the perf.data spec.

perf config:

  Arnaldo Carvalho de Melo:

  - Honour $PERF_CONFIG env var to specify alternate .perfconfig.

perf test:

  Arnaldo Carvalho de Melo:

  - Disable ~/.perfconfig to get default output in 'perf trace' tests.

perf top:

  Arnaldo Carvalho de Melo:

  - Set display thread COMM to help with debugging.

  - Collapse and resort evsels in a group, so that we have output
    similar to 'perf report' when using event groups, i.e.

      perf top -e '{cycles,instructions}'

    Will have two columns, and the instructions one will work.

core:

  Igor Lubashev:

  - Detect if libcap development files are available so that we
    can use capabilities to match the checks made by the kernel instead
    of using plain (geteuid() == 0).

Intel:

  Haiyan Song:

  - Add Icelake V1.00 event file.

perf trace:

  Leo Yan:

  - Fix segmentation fault when access syscall info on arm64.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 121 insertions, 0 deletions

diff --git a/drivers/usb/core/sysfs.c b/drivers/usb/core/sysfs.c
index 7e88fdfe3cf5..f19694e69f5c 100644
--- a/drivers/usb/core/sysfs.c
+++ b/drivers/usb/core/sysfs.c
@@ -15,6 +15,7 @@
 #include <linux/kernel.h>
 #include <linux/string.h>
 #include <linux/usb.h>
+#include <linux/usb/hcd.h>
 #include <linux/usb/quirks.h>
 #include <linux/of.h>
 #include "usb.h"
@@ -922,6 +923,116 @@ static struct bin_attribute dev_bin_attr_descriptors = {
 	.size = 18 + 65535,	/* dev descr + max-size raw descriptor */
 };
 
+/*
+ * Show & store the current value of authorized_default
+ */
+static ssize_t authorized_default_show(struct device *dev,
+				       struct device_attribute *attr, char *buf)
+{
+	struct usb_device *rh_usb_dev = to_usb_device(dev);
+	struct usb_bus *usb_bus = rh_usb_dev->bus;
+	struct usb_hcd *hcd;
+
+	hcd = bus_to_hcd(usb_bus);
+	return snprintf(buf, PAGE_SIZE, "%u\n", hcd->dev_policy);
+}
+
+static ssize_t authorized_default_store(struct device *dev,
+					struct device_attribute *attr,
+					const char *buf, size_t size)
+{
+	ssize_t result;
+	unsigned int val;
+	struct usb_device *rh_usb_dev = to_usb_device(dev);
+	struct usb_bus *usb_bus = rh_usb_dev->bus;
+	struct usb_hcd *hcd;
+
+	hcd = bus_to_hcd(usb_bus);
+	result = sscanf(buf, "%u\n", &val);
+	if (result == 1) {
+		hcd->dev_policy = val <= USB_DEVICE_AUTHORIZE_INTERNAL ?
+			val : USB_DEVICE_AUTHORIZE_ALL;
+		result = size;
+	} else {
+		result = -EINVAL;
+	}
+	return result;
+}
+static DEVICE_ATTR_RW(authorized_default);
+
+/*
+ * interface_authorized_default_show - show default authorization status
+ * for USB interfaces
+ *
+ * note: interface_authorized_default is the default value
+ *       for initializing the authorized attribute of interfaces
+ */
+static ssize_t interface_authorized_default_show(struct device *dev,
+		struct device_attribute *attr, char *buf)
+{
+	struct usb_device *usb_dev = to_usb_device(dev);
+	struct usb_hcd *hcd = bus_to_hcd(usb_dev->bus);
+
+	return sprintf(buf, "%u\n", !!HCD_INTF_AUTHORIZED(hcd));
+}
+
+/*
+ * interface_authorized_default_store - store default authorization status
+ * for USB interfaces
+ *
+ * note: interface_authorized_default is the default value
+ *       for initializing the authorized attribute of interfaces
+ */
+static ssize_t interface_authorized_default_store(struct device *dev,
+		struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct usb_device *usb_dev = to_usb_device(dev);
+	struct usb_hcd *hcd = bus_to_hcd(usb_dev->bus);
+	int rc = count;
+	bool val;
+
+	if (strtobool(buf, &val) != 0)
+		return -EINVAL;
+
+	if (val)
+		set_bit(HCD_FLAG_INTF_AUTHORIZED, &hcd->flags);
+	else
+		clear_bit(HCD_FLAG_INTF_AUTHORIZED, &hcd->flags);
+
+	return rc;
+}
+static DEVICE_ATTR_RW(interface_authorized_default);
+
+/* Group all the USB bus attributes */
+static struct attribute *usb_bus_attrs[] = {
+		&dev_attr_authorized_default.attr,
+		&dev_attr_interface_authorized_default.attr,
+		NULL,
+};
+
+static const struct attribute_group usb_bus_attr_group = {
+	.name = NULL,	/* we want them in the same directory */
+	.attrs = usb_bus_attrs,
+};
+
+
+static int add_default_authorized_attributes(struct device *dev)
+{
+	int rc = 0;
+
+	if (is_usb_device(dev))
+		rc = sysfs_create_group(&dev->kobj, &usb_bus_attr_group);
+
+	return rc;
+}
+
+static void remove_default_authorized_attributes(struct device *dev)
+{
+	if (is_usb_device(dev)) {
+		sysfs_remove_group(&dev->kobj, &usb_bus_attr_group);
+	}
+}
+
 int usb_create_sysfs_dev_files(struct usb_device *udev)
 {
 	struct device *dev = &udev->dev;
@@ -938,7 +1049,14 @@ int usb_create_sysfs_dev_files(struct usb_device *udev)
 	retval = add_power_attributes(dev);
 	if (retval)
 		goto error;
+
+	if (is_root_hub(udev)) {
+		retval = add_default_authorized_attributes(dev);
+		if (retval)
+			goto error;
+	}
 	return retval;
+
 error:
 	usb_remove_sysfs_dev_files(udev);
 	return retval;
@@ -948,6 +1066,9 @@ void usb_remove_sysfs_dev_files(struct usb_device *udev)
 {
 	struct device *dev = &udev->dev;
 
+	if (is_root_hub(udev))
+		remove_default_authorized_attributes(dev);
+
 	remove_power_attributes(dev);
 	remove_persist_attributes(dev);
 	device_remove_bin_file(dev, &dev_bin_attr_descriptors);