Stop including cpu.h in files that don't need it. Signed-off-by: Thomas Huth <thuth@redhat.com> Message-Id: <20210416171314.2074665-4-thuth@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
187 lines
4.7 KiB
C
187 lines
4.7 KiB
C
/*
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* VFIO based AP matrix device assignment
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*
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* Copyright 2018 IBM Corp.
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* Author(s): Tony Krowiak <akrowiak@linux.ibm.com>
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* Halil Pasic <pasic@linux.ibm.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or (at
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* your option) any later version. See the COPYING file in the top-level
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* directory.
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*/
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#include "qemu/osdep.h"
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#include <linux/vfio.h>
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#include <sys/ioctl.h>
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#include "qapi/error.h"
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#include "hw/vfio/vfio.h"
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#include "hw/vfio/vfio-common.h"
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#include "hw/s390x/ap-device.h"
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#include "qemu/error-report.h"
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#include "qemu/module.h"
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#include "qemu/option.h"
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#include "qemu/config-file.h"
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#include "kvm_s390x.h"
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#include "migration/vmstate.h"
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#include "hw/qdev-properties.h"
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#include "hw/s390x/ap-bridge.h"
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#include "exec/address-spaces.h"
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#include "qom/object.h"
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#define TYPE_VFIO_AP_DEVICE "vfio-ap"
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struct VFIOAPDevice {
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APDevice apdev;
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VFIODevice vdev;
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};
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OBJECT_DECLARE_SIMPLE_TYPE(VFIOAPDevice, VFIO_AP_DEVICE)
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static void vfio_ap_compute_needs_reset(VFIODevice *vdev)
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{
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vdev->needs_reset = false;
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}
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/*
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* We don't need vfio_hot_reset_multi and vfio_eoi operations for
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* vfio-ap device now.
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*/
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struct VFIODeviceOps vfio_ap_ops = {
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.vfio_compute_needs_reset = vfio_ap_compute_needs_reset,
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};
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static void vfio_ap_put_device(VFIOAPDevice *vapdev)
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{
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g_free(vapdev->vdev.name);
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vfio_put_base_device(&vapdev->vdev);
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}
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static VFIOGroup *vfio_ap_get_group(VFIOAPDevice *vapdev, Error **errp)
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{
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GError *gerror = NULL;
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char *symlink, *group_path;
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int groupid;
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symlink = g_strdup_printf("%s/iommu_group", vapdev->vdev.sysfsdev);
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group_path = g_file_read_link(symlink, &gerror);
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g_free(symlink);
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if (!group_path) {
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error_setg(errp, "%s: no iommu_group found for %s: %s",
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TYPE_VFIO_AP_DEVICE, vapdev->vdev.sysfsdev, gerror->message);
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g_error_free(gerror);
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return NULL;
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}
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if (sscanf(basename(group_path), "%d", &groupid) != 1) {
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error_setg(errp, "vfio: failed to read %s", group_path);
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g_free(group_path);
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return NULL;
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}
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g_free(group_path);
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return vfio_get_group(groupid, &address_space_memory, errp);
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}
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static void vfio_ap_realize(DeviceState *dev, Error **errp)
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{
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int ret;
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char *mdevid;
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VFIOGroup *vfio_group;
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APDevice *apdev = AP_DEVICE(dev);
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VFIOAPDevice *vapdev = VFIO_AP_DEVICE(apdev);
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vfio_group = vfio_ap_get_group(vapdev, errp);
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if (!vfio_group) {
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return;
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}
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vapdev->vdev.ops = &vfio_ap_ops;
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vapdev->vdev.type = VFIO_DEVICE_TYPE_AP;
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mdevid = basename(vapdev->vdev.sysfsdev);
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vapdev->vdev.name = g_strdup_printf("%s", mdevid);
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vapdev->vdev.dev = dev;
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/*
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* vfio-ap devices operate in a way compatible with discarding of
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* memory in RAM blocks, as no pages are pinned in the host.
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* This needs to be set before vfio_get_device() for vfio common to
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* handle ram_block_discard_disable().
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*/
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vapdev->vdev.ram_block_discard_allowed = true;
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ret = vfio_get_device(vfio_group, mdevid, &vapdev->vdev, errp);
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if (ret) {
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goto out_get_dev_err;
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}
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return;
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out_get_dev_err:
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vfio_ap_put_device(vapdev);
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vfio_put_group(vfio_group);
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}
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static void vfio_ap_unrealize(DeviceState *dev)
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{
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APDevice *apdev = AP_DEVICE(dev);
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VFIOAPDevice *vapdev = VFIO_AP_DEVICE(apdev);
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VFIOGroup *group = vapdev->vdev.group;
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vfio_ap_put_device(vapdev);
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vfio_put_group(group);
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}
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static Property vfio_ap_properties[] = {
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DEFINE_PROP_STRING("sysfsdev", VFIOAPDevice, vdev.sysfsdev),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void vfio_ap_reset(DeviceState *dev)
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{
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int ret;
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APDevice *apdev = AP_DEVICE(dev);
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VFIOAPDevice *vapdev = VFIO_AP_DEVICE(apdev);
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ret = ioctl(vapdev->vdev.fd, VFIO_DEVICE_RESET);
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if (ret) {
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error_report("%s: failed to reset %s device: %s", __func__,
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vapdev->vdev.name, strerror(errno));
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}
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}
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static const VMStateDescription vfio_ap_vmstate = {
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.name = "vfio-ap",
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.unmigratable = 1,
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};
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static void vfio_ap_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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device_class_set_props(dc, vfio_ap_properties);
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dc->vmsd = &vfio_ap_vmstate;
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dc->desc = "VFIO-based AP device assignment";
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set_bit(DEVICE_CATEGORY_MISC, dc->categories);
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dc->realize = vfio_ap_realize;
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dc->unrealize = vfio_ap_unrealize;
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dc->hotpluggable = true;
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dc->reset = vfio_ap_reset;
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dc->bus_type = TYPE_AP_BUS;
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}
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static const TypeInfo vfio_ap_info = {
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.name = TYPE_VFIO_AP_DEVICE,
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.parent = TYPE_AP_DEVICE,
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.instance_size = sizeof(VFIOAPDevice),
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.class_init = vfio_ap_class_init,
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};
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static void vfio_ap_type_init(void)
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{
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type_register_static(&vfio_ap_info);
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}
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type_init(vfio_ap_type_init)
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