In my "build everything" tree, changing sysemu/sysemu.h triggers a recompile of some 5400 out of 6600 objects (not counting tests and objects that don't depend on qemu/osdep.h). Almost a third of its inclusions are actually superfluous. Delete them. Downgrade two more to qapi/qapi-types-run-state.h, and move one from char/serial.h to char/serial.c. hw/semihosting/config.c, monitor/monitor.c, qdev-monitor.c, and stubs/semihost.c define variables declared in sysemu/sysemu.h without including it. The compiler is cool with that, but include it anyway. This doesn't reduce actual use much, as it's still included into widely included headers. The next commit will tackle that. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Message-Id: <20190812052359.30071-27-armbru@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
191 lines
4.8 KiB
C
191 lines
4.8 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/sysbus.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 "cpu.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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#define VFIO_AP_DEVICE_TYPE "vfio-ap"
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typedef struct VFIOAPDevice {
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APDevice apdev;
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VFIODevice vdev;
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} VFIOAPDevice;
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#define VFIO_AP_DEVICE(obj) \
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OBJECT_CHECK(VFIOAPDevice, (obj), VFIO_AP_DEVICE_TYPE)
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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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VFIO_AP_DEVICE_TYPE, vapdev->vdev.sysfsdev, gerror->message);
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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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Error *local_err = NULL;
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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, &local_err);
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if (!vfio_group) {
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goto out_err;
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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
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* memory ballooning, 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 the balloon inhibitor.
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*/
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vapdev->vdev.balloon_allowed = true;
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ret = vfio_get_device(vfio_group, mdevid, &vapdev->vdev, &local_err);
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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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out_err:
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error_propagate(errp, local_err);
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}
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static void vfio_ap_unrealize(DeviceState *dev, Error **errp)
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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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dc->props = 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 = VFIO_AP_DEVICE_TYPE,
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.parent = AP_DEVICE_TYPE,
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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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