From db40598863e8cbbd11053ad3c8bae89000f603f9 Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Tue, 30 Dec 2008 09:26:02 -0600 Subject: virtio: use KVM_S390_VIRTIO_RING_ALIGN instead of relying on pagesize This doesn't really matter, since s390 pagesize is 4k anyway. Signed-off-by: Rusty Russell Acked-by: Christian Borntraeger --- drivers/s390/kvm/kvm_virtio.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'drivers/s390/kvm') diff --git a/drivers/s390/kvm/kvm_virtio.c b/drivers/s390/kvm/kvm_virtio.c index 3d442444c618..f5a2dbe75575 100644 --- a/drivers/s390/kvm/kvm_virtio.c +++ b/drivers/s390/kvm/kvm_virtio.c @@ -188,7 +188,8 @@ static struct virtqueue *kvm_find_vq(struct virtio_device *vdev, config = kvm_vq_config(kdev->desc)+index; err = vmem_add_mapping(config->address, - vring_size(config->num, PAGE_SIZE)); + vring_size(config->num, + KVM_S390_VIRTIO_RING_ALIGN)); if (err) goto out; @@ -209,7 +210,8 @@ static struct virtqueue *kvm_find_vq(struct virtio_device *vdev, return vq; unmap: vmem_remove_mapping(config->address, - vring_size(config->num, PAGE_SIZE)); + vring_size(config->num, + KVM_S390_VIRTIO_RING_ALIGN)); out: return ERR_PTR(err); } @@ -220,7 +222,8 @@ static void kvm_del_vq(struct virtqueue *vq) vring_del_virtqueue(vq); vmem_remove_mapping(config->address, - vring_size(config->num, PAGE_SIZE)); + vring_size(config->num, + KVM_S390_VIRTIO_RING_ALIGN)); } /* -- cgit v1.2.3 From 87c7d57c17ade5024d95b6ca0da249da49b0672a Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Tue, 30 Dec 2008 09:26:03 -0600 Subject: virtio: hand virtio ring alignment as argument to vring_new_virtqueue This allows each virtio user to hand in the alignment appropriate to their virtio_ring structures. Signed-off-by: Rusty Russell Acked-by: Christian Borntraeger --- drivers/lguest/lguest_device.c | 4 ++-- drivers/s390/kvm/kvm_virtio.c | 3 ++- drivers/virtio/virtio_pci.c | 4 ++-- drivers/virtio/virtio_ring.c | 3 ++- include/linux/virtio_ring.h | 1 + 5 files changed, 9 insertions(+), 6 deletions(-) (limited to 'drivers/s390/kvm') diff --git a/drivers/lguest/lguest_device.c b/drivers/lguest/lguest_device.c index f062dc55c573..b02f6bcb64c4 100644 --- a/drivers/lguest/lguest_device.c +++ b/drivers/lguest/lguest_device.c @@ -259,8 +259,8 @@ static struct virtqueue *lg_find_vq(struct virtio_device *vdev, /* OK, tell virtio_ring.c to set up a virtqueue now we know its size * and we've got a pointer to its pages. */ - vq = vring_new_virtqueue(lvq->config.num, vdev, lvq->pages, - lg_notify, callback); + vq = vring_new_virtqueue(lvq->config.num, LGUEST_VRING_ALIGN, + vdev, lvq->pages, lg_notify, callback); if (!vq) { err = -ENOMEM; goto unmap; diff --git a/drivers/s390/kvm/kvm_virtio.c b/drivers/s390/kvm/kvm_virtio.c index f5a2dbe75575..4e8354aa8576 100644 --- a/drivers/s390/kvm/kvm_virtio.c +++ b/drivers/s390/kvm/kvm_virtio.c @@ -193,7 +193,8 @@ static struct virtqueue *kvm_find_vq(struct virtio_device *vdev, if (err) goto out; - vq = vring_new_virtqueue(config->num, vdev, (void *) config->address, + vq = vring_new_virtqueue(config->num, KVM_S390_VIRTIO_RING_ALIGN, + vdev, (void *) config->address, kvm_notify, callback); if (!vq) { err = -ENOMEM; diff --git a/drivers/virtio/virtio_pci.c b/drivers/virtio/virtio_pci.c index f28643f3a4e8..7462a51e820b 100644 --- a/drivers/virtio/virtio_pci.c +++ b/drivers/virtio/virtio_pci.c @@ -249,8 +249,8 @@ static struct virtqueue *vp_find_vq(struct virtio_device *vdev, unsigned index, vp_dev->ioaddr + VIRTIO_PCI_QUEUE_PFN); /* create the vring */ - vq = vring_new_virtqueue(info->num, vdev, info->queue, - vp_notify, callback); + vq = vring_new_virtqueue(info->num, VIRTIO_PCI_VRING_ALIGN, + vdev, info->queue, vp_notify, callback); if (!vq) { err = -ENOMEM; goto out_activate_queue; diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 6eb5303fed11..5777196bf6c9 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -274,6 +274,7 @@ static struct virtqueue_ops vring_vq_ops = { }; struct virtqueue *vring_new_virtqueue(unsigned int num, + unsigned int vring_align, struct virtio_device *vdev, void *pages, void (*notify)(struct virtqueue *), @@ -292,7 +293,7 @@ struct virtqueue *vring_new_virtqueue(unsigned int num, if (!vq) return NULL; - vring_init(&vq->vring, num, pages, PAGE_SIZE); + vring_init(&vq->vring, num, pages, vring_align); vq->vq.callback = callback; vq->vq.vdev = vdev; vq->vq.vq_ops = &vring_vq_ops; diff --git a/include/linux/virtio_ring.h b/include/linux/virtio_ring.h index 01bf3124e312..71e03722fb59 100644 --- a/include/linux/virtio_ring.h +++ b/include/linux/virtio_ring.h @@ -115,6 +115,7 @@ struct virtio_device; struct virtqueue; struct virtqueue *vring_new_virtqueue(unsigned int num, + unsigned int vring_align, struct virtio_device *vdev, void *pages, void (*notify)(struct virtqueue *vq), -- cgit v1.2.3 From be3c5832d51174ef7f21cefd6ad612dabdcb62fd Mon Sep 17 00:00:00 2001 From: Christian Borntraeger Date: Tue, 18 Nov 2008 22:44:13 +0100 Subject: kvm-s390: implement config_changed for virtio on s390 This patch implements config_changed for the s390 virtio transport. We use the least significant bit of the interrupt parameter field to decide, if this interrupt should call the virtio virtqueue callback or the config_changed callback. This method is compatible with old host and guest code. Old 64 bit guests will not check the bit and trigger a harmless additional vring_interrupt call. Old host code will never set this bit, this is also safe. This patch also takes care of a potential future 31 bit virtio transport for s390. On 31 bit _LC_PFAULT_INTPARM and __LC_EXT_PARAMS are identical. We exploit the alignment of the token and fold the change bit into the lsb of the token itself. Signed-off-by: Christian Borntraeger Signed-off-by: Rusty Russell --- drivers/s390/kvm/kvm_virtio.c | 22 +++++++++++++++++++--- 1 file changed, 19 insertions(+), 3 deletions(-) (limited to 'drivers/s390/kvm') diff --git a/drivers/s390/kvm/kvm_virtio.c b/drivers/s390/kvm/kvm_virtio.c index 4e8354aa8576..28c90b89f2b4 100644 --- a/drivers/s390/kvm/kvm_virtio.c +++ b/drivers/s390/kvm/kvm_virtio.c @@ -299,13 +299,29 @@ static void scan_devices(void) */ static void kvm_extint_handler(u16 code) { - void *data = (void *) *(long *) __LC_PFAULT_INTPARM; - u16 subcode = S390_lowcore.cpu_addr; + struct virtqueue *vq; + u16 subcode; + int config_changed; + subcode = S390_lowcore.cpu_addr; if ((subcode & 0xff00) != VIRTIO_SUBCODE_64) return; - vring_interrupt(0, data); + /* The LSB might be overloaded, we have to mask it */ + vq = (struct virtqueue *) ((*(long *) __LC_PFAULT_INTPARM) & ~1UL); + + /* We use the LSB of extparam, to decide, if this interrupt is a config + * change or a "standard" interrupt */ + config_changed = (*(int *) __LC_EXT_PARAMS & 1); + + if (config_changed) { + struct virtio_driver *drv; + drv = container_of(vq->vdev->dev.driver, + struct virtio_driver, driver); + if (drv->config_changed) + drv->config_changed(vq->vdev); + } else + vring_interrupt(0, vq); } /* -- cgit v1.2.3 From 035da16fb529c0383ac27c712a5bbade5c11cafe Mon Sep 17 00:00:00 2001 From: Mark McLoughlin Date: Mon, 15 Dec 2008 12:58:29 +0000 Subject: s390: remove s390_root_dev_*() Replace s390_root_dev_register() with root_device_register() etc. [Includes fix from Cornelia Huck] Signed-off-by: Mark McLoughlin Cc: Cornelia Huck Signed-off-by: Greg Kroah-Hartman --- arch/s390/include/asm/s390_rdev.h | 15 ------------ drivers/s390/Makefile | 2 +- drivers/s390/block/dcssblk.c | 11 ++++----- drivers/s390/crypto/ap_bus.c | 7 +++--- drivers/s390/kvm/kvm_virtio.c | 5 ++-- drivers/s390/net/cu3088.c | 7 +++--- drivers/s390/net/qeth_core_main.c | 7 +++--- drivers/s390/net/qeth_l2_main.c | 2 -- drivers/s390/net/qeth_l3_main.c | 2 -- drivers/s390/s390_rdev.c | 51 --------------------------------------- net/iucv/iucv.c | 7 +++--- 11 files changed, 20 insertions(+), 96 deletions(-) delete mode 100644 arch/s390/include/asm/s390_rdev.h delete mode 100644 drivers/s390/s390_rdev.c (limited to 'drivers/s390/kvm') diff --git a/arch/s390/include/asm/s390_rdev.h b/arch/s390/include/asm/s390_rdev.h deleted file mode 100644 index 6fa20442a48c..000000000000 --- a/arch/s390/include/asm/s390_rdev.h +++ /dev/null @@ -1,15 +0,0 @@ -/* - * include/asm-s390/ccwdev.h - * - * Copyright (C) 2002,2005 IBM Deutschland Entwicklung GmbH, IBM Corporation - * Author(s): Cornelia Huck - * Carsten Otte - * - * Interface for s390 root device - */ - -#ifndef _S390_RDEV_H_ -#define _S390_RDEV_H_ -extern struct device *s390_root_dev_register(const char *); -extern void s390_root_dev_unregister(struct device *); -#endif /* _S390_RDEV_H_ */ diff --git a/drivers/s390/Makefile b/drivers/s390/Makefile index 4f4e7cf105d4..d0eae59bc366 100644 --- a/drivers/s390/Makefile +++ b/drivers/s390/Makefile @@ -4,7 +4,7 @@ CFLAGS_sysinfo.o += -Iinclude/math-emu -Iarch/s390/math-emu -w -obj-y += s390mach.o sysinfo.o s390_rdev.o +obj-y += s390mach.o sysinfo.o obj-y += cio/ block/ char/ crypto/ net/ scsi/ kvm/ drivers-y += drivers/s390/built-in.o diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c index 26ffc6ab441d..cfdcf1aed33c 100644 --- a/drivers/s390/block/dcssblk.c +++ b/drivers/s390/block/dcssblk.c @@ -18,7 +18,6 @@ #include #include #include -#include #define DCSSBLK_NAME "dcssblk" #define DCSSBLK_MINORS_PER_DISK 1 @@ -946,7 +945,7 @@ dcssblk_check_params(void) static void __exit dcssblk_exit(void) { - s390_root_dev_unregister(dcssblk_root_dev); + root_device_unregister(dcssblk_root_dev); unregister_blkdev(dcssblk_major, DCSSBLK_NAME); } @@ -955,22 +954,22 @@ dcssblk_init(void) { int rc; - dcssblk_root_dev = s390_root_dev_register("dcssblk"); + dcssblk_root_dev = root_device_register("dcssblk"); if (IS_ERR(dcssblk_root_dev)) return PTR_ERR(dcssblk_root_dev); rc = device_create_file(dcssblk_root_dev, &dev_attr_add); if (rc) { - s390_root_dev_unregister(dcssblk_root_dev); + root_device_unregister(dcssblk_root_dev); return rc; } rc = device_create_file(dcssblk_root_dev, &dev_attr_remove); if (rc) { - s390_root_dev_unregister(dcssblk_root_dev); + root_device_unregister(dcssblk_root_dev); return rc; } rc = register_blkdev(0, DCSSBLK_NAME); if (rc < 0) { - s390_root_dev_unregister(dcssblk_root_dev); + root_device_unregister(dcssblk_root_dev); return rc; } dcssblk_major = rc; diff --git a/drivers/s390/crypto/ap_bus.c b/drivers/s390/crypto/ap_bus.c index 1f5f5d2d87d9..9c148406b980 100644 --- a/drivers/s390/crypto/ap_bus.c +++ b/drivers/s390/crypto/ap_bus.c @@ -36,7 +36,6 @@ #include #include #include -#include #include #include #include @@ -1522,7 +1521,7 @@ int __init ap_module_init(void) } /* Create /sys/devices/ap. */ - ap_root_device = s390_root_dev_register("ap"); + ap_root_device = root_device_register("ap"); rc = IS_ERR(ap_root_device) ? PTR_ERR(ap_root_device) : 0; if (rc) goto out_bus; @@ -1565,7 +1564,7 @@ out_work: hrtimer_cancel(&ap_poll_timer); destroy_workqueue(ap_work_queue); out_root: - s390_root_dev_unregister(ap_root_device); + root_device_unregister(ap_root_device); out_bus: while (i--) bus_remove_file(&ap_bus_type, ap_bus_attrs[i]); @@ -1600,7 +1599,7 @@ void ap_module_exit(void) hrtimer_cancel(&ap_poll_timer); destroy_workqueue(ap_work_queue); tasklet_kill(&ap_tasklet); - s390_root_dev_unregister(ap_root_device); + root_device_unregister(ap_root_device); while ((dev = bus_find_device(&ap_bus_type, NULL, NULL, __ap_match_all))) { diff --git a/drivers/s390/kvm/kvm_virtio.c b/drivers/s390/kvm/kvm_virtio.c index 28c90b89f2b4..cbc8566fab70 100644 --- a/drivers/s390/kvm/kvm_virtio.c +++ b/drivers/s390/kvm/kvm_virtio.c @@ -24,7 +24,6 @@ #include #include #include -#include #define VIRTIO_SUBCODE_64 0x0D00 @@ -335,7 +334,7 @@ static int __init kvm_devices_init(void) if (!MACHINE_IS_KVM) return -ENODEV; - kvm_root = s390_root_dev_register("kvm_s390"); + kvm_root = root_device_register("kvm_s390"); if (IS_ERR(kvm_root)) { rc = PTR_ERR(kvm_root); printk(KERN_ERR "Could not register kvm_s390 root device"); @@ -344,7 +343,7 @@ static int __init kvm_devices_init(void) rc = vmem_add_mapping(real_memory_size, PAGE_SIZE); if (rc) { - s390_root_dev_unregister(kvm_root); + root_device_unregister(kvm_root); return rc; } diff --git a/drivers/s390/net/cu3088.c b/drivers/s390/net/cu3088.c index f4a32375c037..48383459e99b 100644 --- a/drivers/s390/net/cu3088.c +++ b/drivers/s390/net/cu3088.c @@ -25,7 +25,6 @@ #include #include -#include #include #include @@ -120,12 +119,12 @@ cu3088_init (void) { int rc; - cu3088_root_dev = s390_root_dev_register("cu3088"); + cu3088_root_dev = root_device_register("cu3088"); if (IS_ERR(cu3088_root_dev)) return PTR_ERR(cu3088_root_dev); rc = ccw_driver_register(&cu3088_driver); if (rc) - s390_root_dev_unregister(cu3088_root_dev); + root_device_unregister(cu3088_root_dev); return rc; } @@ -134,7 +133,7 @@ static void __exit cu3088_exit (void) { ccw_driver_unregister(&cu3088_driver); - s390_root_dev_unregister(cu3088_root_dev); + root_device_unregister(cu3088_root_dev); } MODULE_DEVICE_TABLE(ccw,cu3088_ids); diff --git a/drivers/s390/net/qeth_core_main.c b/drivers/s390/net/qeth_core_main.c index 6811dd529f48..d1b5bebea7fb 100644 --- a/drivers/s390/net/qeth_core_main.c +++ b/drivers/s390/net/qeth_core_main.c @@ -24,7 +24,6 @@ #include #include -#include #include "qeth_core.h" #include "qeth_core_offl.h" @@ -4525,7 +4524,7 @@ static int __init qeth_core_init(void) &driver_attr_group); if (rc) goto driver_err; - qeth_core_root_dev = s390_root_dev_register("qeth"); + qeth_core_root_dev = root_device_register("qeth"); rc = IS_ERR(qeth_core_root_dev) ? PTR_ERR(qeth_core_root_dev) : 0; if (rc) goto register_err; @@ -4539,7 +4538,7 @@ static int __init qeth_core_init(void) return 0; slab_err: - s390_root_dev_unregister(qeth_core_root_dev); + root_device_unregister(qeth_core_root_dev); register_err: driver_remove_file(&qeth_core_ccwgroup_driver.driver, &driver_attr_group); @@ -4557,7 +4556,7 @@ out_err: static void __exit qeth_core_exit(void) { - s390_root_dev_unregister(qeth_core_root_dev); + root_device_unregister(qeth_core_root_dev); driver_remove_file(&qeth_core_ccwgroup_driver.driver, &driver_attr_group); ccwgroup_driver_unregister(&qeth_core_ccwgroup_driver); diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c index 21627ba3093b..591a2b3ae4cb 100644 --- a/drivers/s390/net/qeth_l2_main.c +++ b/drivers/s390/net/qeth_l2_main.c @@ -20,8 +20,6 @@ #include #include -#include - #include "qeth_core.h" #include "qeth_core_offl.h" diff --git a/drivers/s390/net/qeth_l3_main.c b/drivers/s390/net/qeth_l3_main.c index cfda1ecffdf2..4693ee4e7b98 100644 --- a/drivers/s390/net/qeth_l3_main.c +++ b/drivers/s390/net/qeth_l3_main.c @@ -26,8 +26,6 @@ #include #include -#include - #include "qeth_l3.h" #include "qeth_core_offl.h" diff --git a/drivers/s390/s390_rdev.c b/drivers/s390/s390_rdev.c deleted file mode 100644 index 64371c05a3b3..000000000000 --- a/drivers/s390/s390_rdev.c +++ /dev/null @@ -1,51 +0,0 @@ -/* - * drivers/s390/s390_rdev.c - * s390 root device - * - * Copyright (C) 2002, 2005 IBM Deutschland Entwicklung GmbH, - * IBM Corporation - * Author(s): Cornelia Huck (cornelia.huck@de.ibm.com) - * Carsten Otte (cotte@de.ibm.com) - */ - -#include -#include -#include -#include - -static void -s390_root_dev_release(struct device *dev) -{ - kfree(dev); -} - -struct device * -s390_root_dev_register(const char *name) -{ - struct device *dev; - int ret; - - if (!strlen(name)) - return ERR_PTR(-EINVAL); - dev = kzalloc(sizeof(struct device), GFP_KERNEL); - if (!dev) - return ERR_PTR(-ENOMEM); - dev_set_name(dev, name); - dev->release = s390_root_dev_release; - ret = device_register(dev); - if (ret) { - kfree(dev); - return ERR_PTR(ret); - } - return dev; -} - -void -s390_root_dev_unregister(struct device *dev) -{ - if (dev) - device_unregister(dev); -} - -EXPORT_SYMBOL(s390_root_dev_register); -EXPORT_SYMBOL(s390_root_dev_unregister); diff --git a/net/iucv/iucv.c b/net/iucv/iucv.c index 032f61e98595..a35240f61ec3 100644 --- a/net/iucv/iucv.c +++ b/net/iucv/iucv.c @@ -50,7 +50,6 @@ #include #include #include -#include #include /* @@ -1696,7 +1695,7 @@ static int __init iucv_init(void) rc = register_external_interrupt(0x4000, iucv_external_interrupt); if (rc) goto out; - iucv_root = s390_root_dev_register("iucv"); + iucv_root = root_device_register("iucv"); if (IS_ERR(iucv_root)) { rc = PTR_ERR(iucv_root); goto out_int; @@ -1740,7 +1739,7 @@ out_free: kfree(iucv_irq_data[cpu]); iucv_irq_data[cpu] = NULL; } - s390_root_dev_unregister(iucv_root); + root_device_unregister(iucv_root); out_int: unregister_external_interrupt(0x4000, iucv_external_interrupt); out: @@ -1770,7 +1769,7 @@ static void __exit iucv_exit(void) kfree(iucv_irq_data[cpu]); iucv_irq_data[cpu] = NULL; } - s390_root_dev_unregister(iucv_root); + root_device_unregister(iucv_root); bus_unregister(&iucv_bus); unregister_external_interrupt(0x4000, iucv_external_interrupt); } -- cgit v1.2.3