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authorSebastian Ott <sebott@linux.ibm.com>2019-07-10 14:06:47 +0200
committerVasily Gorbik <gor@linux.ibm.com>2019-07-11 20:40:02 +0200
commit8e4708b3f8d949a74499426614b9b8ea5bcad15a (patch)
tree5c413031eff030b7068c8201be5f131651424b7f /arch/s390
parent9964f396f1d0eed72c50f7ae367119afd355ab9c (diff)
downloadlinux-8e4708b3f8d949a74499426614b9b8ea5bcad15a.tar.bz2
s390/pci: add mio_enabled attribute
Provide an attribute to query the usage of mio instructions. Signed-off-by: Sebastian Ott <sebott@linux.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/pci/pci_sysfs.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/s390/pci/pci_sysfs.c b/arch/s390/pci/pci_sysfs.c
index 430c14b006d1..a433ba01a317 100644
--- a/arch/s390/pci/pci_sysfs.c
+++ b/arch/s390/pci/pci_sysfs.c
@@ -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 = {