Commit 8e4708b3 authored by Sebastian Ott's avatar Sebastian Ott Committed by Vasily Gorbik
Browse files

s390/pci: add mio_enabled attribute 



Provide an attribute to query the usage of mio instructions.

Signed-off-by: default avatarSebastian Ott <sebott@linux.ibm.com>
Signed-off-by: default avatarVasily Gorbik <gor@linux.ibm.com>
parent 9964f396

arch/s390/pci/pci_sysfs.c

+10 −0
Original line number Diff line number Diff line
@@ -37,6 +37,15 @@ zpci_attr(segment1, "0x%02x\n", pfip[1]); 
zpci_attr(segment2, "0x%02x\n", pfip[2]);

zpci_attr(segment3, "0x%02x\n", pfip[3]);



static ssize_t mio_enabled_show(struct device *dev,

				struct device_attribute *attr, char *buf)

{

	struct zpci_dev *zdev = to_zpci(to_pci_dev(dev));



	return sprintf(buf, zpci_use_mio(zdev) ? "1\n" : "0\n");

}

static DEVICE_ATTR_RO(mio_enabled);



static ssize_t recover_store(struct device *dev, struct device_attribute *attr,

			     const char *buf, size_t count)

{
@@ -115,6 +124,7 @@ static struct attribute *zpci_dev_attrs[] = { 
	&dev_attr_vfn.attr,

	&dev_attr_uid.attr,

	&dev_attr_recover.attr,

	&dev_attr_mio_enabled.attr,

	NULL,

};

static struct attribute_group zpci_attr_group = {