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author | Halil Pasic <pasic@linux.vnet.ibm.com> | 2017-09-21 20:08:39 +0200 |
---|---|---|
committer | Cornelia Huck <cohuck@redhat.com> | 2017-10-06 10:53:01 +0200 |
commit | f57ba05823b7c444133f0862077b45824a6a89b5 (patch) | |
tree | 6fd887f1d2c5dcf95c1f817a71c1a371ba1e2365 /hw | |
parent | 0a22eac5aaf90b2c2c1a4c29eecc25ef508d520b (diff) | |
download | qemu-f57ba05823b7c444133f0862077b45824a6a89b5.zip qemu-f57ba05823b7c444133f0862077b45824a6a89b5.tar.gz qemu-f57ba05823b7c444133f0862077b45824a6a89b5.tar.bz2 |
virtio-ccw: use ccw data stream
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.
Note that checking the return code for ccw_dstream_* will be
done in a follow-on patch.
Signed-off-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.vnet.ibm.com>
Reviewed-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Message-Id: <20170921180841.24490-4-pasic@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'hw')
-rw-r--r-- | hw/s390x/virtio-ccw.c | 155 |
1 files changed, 46 insertions, 109 deletions
diff --git a/hw/s390x/virtio-ccw.c b/hw/s390x/virtio-ccw.c index 62d69aa..085f17f 100644 --- a/hw/s390x/virtio-ccw.c +++ b/hw/s390x/virtio-ccw.c @@ -289,49 +289,19 @@ 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; @@ -344,15 +314,13 @@ 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; @@ -396,11 +364,8 @@ 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. */ @@ -419,9 +384,9 @@ 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; } @@ -440,15 +405,8 @@ 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) | @@ -489,7 +447,7 @@ static int virtio_ccw_cb(SubchDev *sch, CCW1 ccw) ret = -EFAULT; } else { virtio_bus_get_vdev_config(&dev->bus, vdev->config); - cpu_physical_memory_write(ccw.cda, vdev->config, len); + ccw_dstream_write_buf(&sch->cds, vdev->config, len); sch->curr_status.scsw.count = ccw.count - len; ret = 0; } @@ -502,20 +460,13 @@ 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; - memcpy(vdev->config, config, len); - cpu_physical_memory_unmap(config, hw_len, 0, hw_len); + 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 +504,7 @@ 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 +547,8 @@ 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 +568,8 @@ 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 +589,58 @@ 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 +655,9 @@ 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; |