From: Halil Pasic <pasic@linux.vnet.ibm.com>
To: Cornelia Huck <cohuck@redhat.com>
Cc: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>,
Pierre Morel <pmorel@linux.vnet.ibm.com>,
qemu-devel@nongnu.org, Halil Pasic <pasic@linux.vnet.ibm.com>
Subject: [Qemu-devel] [PATCH 3/5] virtio-ccw: use ccw data stream
Date: Tue, 5 Sep 2017 13:16:43 +0200 [thread overview]
Message-ID: <20170905111645.18068-4-pasic@linux.vnet.ibm.com> (raw)
In-Reply-To: <20170905111645.18068-1-pasic@linux.vnet.ibm.com>
Replace direct access which implicitly assumes no IDA
or MIDA with the new ccw data stream interface which should
cope with these transparently in the future.
Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com>
---
Error handling: At the moment we ignore errors reported
by stream ops to keep the change minimal. It might make sense
to change this.
---
hw/s390x/virtio-ccw.c | 158 +++++++++++++++-----------------------------------
1 file changed, 48 insertions(+), 110 deletions(-)
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c
index b1976fdd19..72dd129a15 100644
--- a/hw/s390x/virtio-ccw.c
+++ b/hw/s390x/virtio-ccw.c
@@ -287,49 +287,19 @@ static int virtio_ccw_handle_set_vq(SubchDev *sch, CCW1 ccw, bool check_len,
return -EFAULT;
}
if (is_legacy) {
- linfo.queue = address_space_ldq_be(&address_space_memory, ccw.cda,
- MEMTXATTRS_UNSPECIFIED, NULL);
- linfo.align = address_space_ldl_be(&address_space_memory,
- ccw.cda + sizeof(linfo.queue),
- MEMTXATTRS_UNSPECIFIED,
- NULL);
- linfo.index = address_space_lduw_be(&address_space_memory,
- ccw.cda + sizeof(linfo.queue)
- + sizeof(linfo.align),
- MEMTXATTRS_UNSPECIFIED,
- NULL);
- linfo.num = address_space_lduw_be(&address_space_memory,
- ccw.cda + sizeof(linfo.queue)
- + sizeof(linfo.align)
- + sizeof(linfo.index),
- MEMTXATTRS_UNSPECIFIED,
- NULL);
+ ccw_dstream_read(&sch->cds, linfo);
+ be64_to_cpus(&linfo.queue);
+ be32_to_cpus(&linfo.align);
+ be16_to_cpus(&linfo.index);
+ be16_to_cpus(&linfo.num);
ret = virtio_ccw_set_vqs(sch, NULL, &linfo);
} else {
- info.desc = address_space_ldq_be(&address_space_memory, ccw.cda,
- MEMTXATTRS_UNSPECIFIED, NULL);
- info.index = address_space_lduw_be(&address_space_memory,
- ccw.cda + sizeof(info.desc)
- + sizeof(info.res0),
- MEMTXATTRS_UNSPECIFIED, NULL);
- info.num = address_space_lduw_be(&address_space_memory,
- ccw.cda + sizeof(info.desc)
- + sizeof(info.res0)
- + sizeof(info.index),
- MEMTXATTRS_UNSPECIFIED, NULL);
- info.avail = address_space_ldq_be(&address_space_memory,
- ccw.cda + sizeof(info.desc)
- + sizeof(info.res0)
- + sizeof(info.index)
- + sizeof(info.num),
- MEMTXATTRS_UNSPECIFIED, NULL);
- info.used = address_space_ldq_be(&address_space_memory,
- ccw.cda + sizeof(info.desc)
- + sizeof(info.res0)
- + sizeof(info.index)
- + sizeof(info.num)
- + sizeof(info.avail),
- MEMTXATTRS_UNSPECIFIED, NULL);
+ ccw_dstream_read(&sch->cds, info);
+ be64_to_cpus(&info.desc);
+ be16_to_cpus(&info.index);
+ be16_to_cpus(&info.num);
+ be64_to_cpus(&info.avail);
+ be64_to_cpus(&info.used);
ret = virtio_ccw_set_vqs(sch, &info, NULL);
}
sch->curr_status.scsw.count = 0;
@@ -342,15 +312,13 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
VirtioRevInfo revinfo;
uint8_t status;
VirtioFeatDesc features;
- void *config;
hwaddr indicators;
VqConfigBlock vq_config;
VirtioCcwDevice *dev = sch->driver_data;
VirtIODevice *vdev = virtio_ccw_get_vdev(sch);
bool check_len;
int len;
- hwaddr hw_len;
- VirtioThinintInfo *thinint;
+ VirtioThinintInfo thinint;
if (!dev) {
return -EINVAL;
@@ -394,11 +362,8 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
} else {
VirtioDeviceClass *vdc = VIRTIO_DEVICE_GET_CLASS(vdev);
- features.index = address_space_ldub(&address_space_memory,
- ccw.cda
- + sizeof(features.features),
- MEMTXATTRS_UNSPECIFIED,
- NULL);
+ ccw_dstream_advance(&sch->cds, sizeof(features.features));
+ ccw_dstream_read(&sch->cds, features.index);
if (features.index == 0) {
if (dev->revision >= 1) {
/* Don't offer legacy features for modern devices. */
@@ -417,9 +382,9 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
/* Return zeroes if the guest supports more feature bits. */
features.features = 0;
}
- address_space_stl_le(&address_space_memory, ccw.cda,
- features.features, MEMTXATTRS_UNSPECIFIED,
- NULL);
+ ccw_dstream_rewind(&sch->cds);
+ cpu_to_le32s(&features.features);
+ ccw_dstream_write(&sch->cds, features.features);
sch->curr_status.scsw.count = ccw.count - sizeof(features);
ret = 0;
}
@@ -438,15 +403,8 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
if (!ccw.cda) {
ret = -EFAULT;
} else {
- features.index = address_space_ldub(&address_space_memory,
- ccw.cda
- + sizeof(features.features),
- MEMTXATTRS_UNSPECIFIED,
- NULL);
- features.features = address_space_ldl_le(&address_space_memory,
- ccw.cda,
- MEMTXATTRS_UNSPECIFIED,
- NULL);
+ ccw_dstream_read(&sch->cds, features);
+ le32_to_cpus(&features.features);
if (features.index == 0) {
virtio_set_features(vdev,
(vdev->guest_features & 0xffffffff00000000ULL) |
@@ -488,7 +446,8 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
} else {
virtio_bus_get_vdev_config(&dev->bus, vdev->config);
/* XXX config space endianness */
- cpu_physical_memory_write(ccw.cda, vdev->config, len);
+ /* TODO we may have made -EINVAL out of -EFAULT */
+ ccw_dstream_write_buf(&sch->cds, vdev->config, len);
sch->curr_status.scsw.count = ccw.count - len;
ret = 0;
}
@@ -501,21 +460,14 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
}
}
len = MIN(ccw.count, vdev->config_len);
- hw_len = len;
if (!ccw.cda) {
ret = -EFAULT;
} else {
- config = cpu_physical_memory_map(ccw.cda, &hw_len, 0);
- if (!config) {
- ret = -EFAULT;
- } else {
- len = hw_len;
- /* XXX config space endianness */
- memcpy(vdev->config, config, len);
- cpu_physical_memory_unmap(config, hw_len, 0, hw_len);
+ /* TODO we may have made -EINVAL out of -EFAULT */
+ ret = ccw_dstream_read_buf(&sch->cds, vdev->config, len);
+ if (!ret) {
virtio_bus_set_vdev_config(&dev->bus, vdev->config);
sch->curr_status.scsw.count = ccw.count - len;
- ret = 0;
}
}
break;
@@ -553,8 +505,7 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
if (!ccw.cda) {
ret = -EFAULT;
} else {
- status = address_space_ldub(&address_space_memory, ccw.cda,
- MEMTXATTRS_UNSPECIFIED, NULL);
+ ccw_dstream_read(&sch->cds, status);
if (!(status & VIRTIO_CONFIG_S_DRIVER_OK)) {
virtio_ccw_stop_ioeventfd(dev);
}
@@ -597,8 +548,8 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
if (!ccw.cda) {
ret = -EFAULT;
} else {
- indicators = address_space_ldq_be(&address_space_memory, ccw.cda,
- MEMTXATTRS_UNSPECIFIED, NULL);
+ ccw_dstream_read(&sch->cds, indicators);
+ be64_to_cpus(&indicators);
dev->indicators = get_indicator(indicators, sizeof(uint64_t));
sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
ret = 0;
@@ -618,8 +569,8 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
if (!ccw.cda) {
ret = -EFAULT;
} else {
- indicators = address_space_ldq_be(&address_space_memory, ccw.cda,
- MEMTXATTRS_UNSPECIFIED, NULL);
+ ccw_dstream_read(&sch->cds, indicators);
+ be64_to_cpus(&indicators);
dev->indicators2 = get_indicator(indicators, sizeof(uint64_t));
sch->curr_status.scsw.count = ccw.count - sizeof(indicators);
ret = 0;
@@ -639,67 +590,58 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
if (!ccw.cda) {
ret = -EFAULT;
} else {
- vq_config.index = address_space_lduw_be(&address_space_memory,
- ccw.cda,
- MEMTXATTRS_UNSPECIFIED,
- NULL);
+ ccw_dstream_read(&sch->cds, vq_config.index);
+ be16_to_cpus(&vq_config.index);
if (vq_config.index >= VIRTIO_QUEUE_MAX) {
ret = -EINVAL;
break;
}
vq_config.num_max = virtio_queue_get_num(vdev,
vq_config.index);
- address_space_stw_be(&address_space_memory,
- ccw.cda + sizeof(vq_config.index),
- vq_config.num_max,
- MEMTXATTRS_UNSPECIFIED,
- NULL);
+ cpu_to_be16s(&vq_config.num_max);
+ ccw_dstream_write(&sch->cds, vq_config.num_max);
sch->curr_status.scsw.count = ccw.count - sizeof(vq_config);
ret = 0;
}
break;
case CCW_CMD_SET_IND_ADAPTER:
if (check_len) {
- if (ccw.count != sizeof(*thinint)) {
+ if (ccw.count != sizeof(thinint)) {
ret = -EINVAL;
break;
}
- } else if (ccw.count < sizeof(*thinint)) {
+ } else if (ccw.count < sizeof(thinint)) {
/* Can't execute command. */
ret = -EINVAL;
break;
}
- len = sizeof(*thinint);
- hw_len = len;
if (!ccw.cda) {
ret = -EFAULT;
} else if (dev->indicators && !sch->thinint_active) {
/* Trigger a command reject. */
ret = -ENOSYS;
} else {
- thinint = cpu_physical_memory_map(ccw.cda, &hw_len, 0);
- if (!thinint) {
+ if (ccw_dstream_read(&sch->cds, thinint)) {
ret = -EFAULT;
} else {
- uint64_t ind_bit = ldq_be_p(&thinint->ind_bit);
+ be64_to_cpus(&thinint.ind_bit);
+ be64_to_cpus(&thinint.summary_indicator);
+ be64_to_cpus(&thinint.device_indicator);
- len = hw_len;
dev->summary_indicator =
- get_indicator(ldq_be_p(&thinint->summary_indicator),
- sizeof(uint8_t));
+ get_indicator(thinint.summary_indicator, sizeof(uint8_t));
dev->indicators =
- get_indicator(ldq_be_p(&thinint->device_indicator),
- ind_bit / 8 + 1);
- dev->thinint_isc = thinint->isc;
- dev->routes.adapter.ind_offset = ind_bit;
+ get_indicator(thinint.device_indicator,
+ thinint.ind_bit / 8 + 1);
+ dev->thinint_isc = thinint.isc;
+ dev->routes.adapter.ind_offset = thinint.ind_bit;
dev->routes.adapter.summary_offset = 7;
- cpu_physical_memory_unmap(thinint, hw_len, 0, hw_len);
dev->routes.adapter.adapter_id = css_get_adapter_id(
CSS_IO_ADAPTER_VIRTIO,
dev->thinint_isc);
sch->thinint_active = ((dev->indicators != NULL) &&
(dev->summary_indicator != NULL));
- sch->curr_status.scsw.count = ccw.count - len;
+ sch->curr_status.scsw.count = ccw.count - sizeof(thinint);
ret = 0;
}
}
@@ -714,13 +656,9 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw)
ret = -EFAULT;
break;
}
- revinfo.revision =
- address_space_lduw_be(&address_space_memory, ccw.cda,
- MEMTXATTRS_UNSPECIFIED, NULL);
- revinfo.length =
- address_space_lduw_be(&address_space_memory,
- ccw.cda + sizeof(revinfo.revision),
- MEMTXATTRS_UNSPECIFIED, NULL);
+ ccw_dstream_read_buf(&sch->cds, &revinfo, 4);
+ be16_to_cpus(&revinfo.revision);
+ be16_to_cpus(&revinfo.length);
if (ccw.count < len + revinfo.length ||
(check_len && ccw.count > len + revinfo.length)) {
ret = -EINVAL;
--
2.13.5
next prev parent reply other threads:[~2017-09-05 11:17 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-05 11:16 [Qemu-devel] [PATCH 0/5] add CCW indirect data access support Halil Pasic
2017-09-05 11:16 ` [Qemu-devel] [PATCH 1/5] s390x/css: introduce css data stream Halil Pasic
2017-09-06 12:18 ` Cornelia Huck
2017-09-06 12:40 ` Halil Pasic
2017-09-06 12:51 ` Cornelia Huck
2017-09-11 16:36 ` Halil Pasic
2017-09-13 9:53 ` Cornelia Huck
2017-09-13 11:35 ` Halil Pasic
2017-09-05 11:16 ` [Qemu-devel] [PATCH 2/5] s390x/css: use ccw " Halil Pasic
2017-09-06 12:32 ` Cornelia Huck
2017-09-06 12:42 ` Halil Pasic
2017-09-21 9:33 ` Pierre Morel
2017-09-21 9:36 ` Pierre Morel
2017-09-21 9:45 ` Cornelia Huck
2017-09-05 11:16 ` Halil Pasic [this message]
2017-09-06 12:42 ` [Qemu-devel] [PATCH 3/5] virtio-ccw: " Cornelia Huck
2017-09-06 12:49 ` Halil Pasic
2017-09-06 12:54 ` Cornelia Huck
2017-09-11 18:14 ` Halil Pasic
2017-09-13 9:58 ` Cornelia Huck
2017-09-13 11:36 ` Halil Pasic
2017-09-05 11:16 ` [Qemu-devel] [PATCH 4/5] s390x/css: support ccw IDA Halil Pasic
2017-09-06 13:10 ` Cornelia Huck
2017-09-11 18:08 ` Halil Pasic
2017-09-13 9:58 ` Cornelia Huck
2017-09-13 10:31 ` Halil Pasic
2017-09-13 10:50 ` Cornelia Huck
2017-09-05 11:16 ` [Qemu-devel] [PATCH 5/5] s390x/ccs: add ccw-tester emulated device Halil Pasic
2017-09-06 13:18 ` Cornelia Huck
2017-09-06 14:24 ` Halil Pasic
2017-09-06 15:20 ` Cornelia Huck
2017-09-06 16:16 ` Halil Pasic
2017-09-07 8:06 ` Cornelia Huck
2017-09-07 9:10 ` Janosch Frank
2017-09-07 12:24 ` Cornelia Huck
2017-09-07 7:31 ` Dong Jia Shi
2017-09-07 8:08 ` Cornelia Huck
2017-09-07 10:21 ` Halil Pasic
2017-09-07 10:52 ` Cornelia Huck
2017-09-08 2:01 ` Dong Jia Shi
2017-09-08 10:28 ` Halil Pasic
2017-09-19 6:03 ` Dong Jia Shi
2017-09-21 8:45 ` Dong Jia Shi
2017-09-21 8:54 ` Cornelia Huck
2017-09-26 7:48 ` Dong Jia Shi
2017-09-27 7:11 ` Dong Jia Shi
2017-09-08 10:45 ` [Qemu-devel] [PATCH 0/5] add CCW indirect data access support Halil Pasic
2017-09-08 10:49 ` Cornelia Huck
2017-09-08 11:03 ` Halil Pasic
2017-09-08 11:19 ` Cornelia Huck
2017-09-08 11:43 ` Halil Pasic
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170905111645.18068-4-pasic@linux.vnet.ibm.com \
--to=pasic@linux.vnet.ibm.com \
--cc=bjsdjshi@linux.vnet.ibm.com \
--cc=cohuck@redhat.com \
--cc=pmorel@linux.vnet.ibm.com \
--cc=qemu-devel@nongnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.