On Thu, 2018-10-18 at 03:38 -0400, Frediano Ziglio wrote:
> >
> > Calls new SPICE QXL interface functions to set:
> >
> > * The hardware address of the graphics device represented by the QXL
> > interface (e.g. a PCI path):
> > spice_qxl_set_device_address(...)
> >
> > * The device display IDs (the IDs of the device's monitors that belong
> > to this QXL interface):
> > spice_qxl_monitor_set_device_display_id(...)
> >
> > Signed-off-by: Lukáš Hrázký <lhra...@redhat.com>
> > ---
> > hw/display/qxl.c | 8 ++++++++
> > ui/spice-core.c | 45 ++++++++++++++++++++++++++++++++++++++++++++-
> > ui/spice-display.c | 5 +++++
> > 3 files changed, 57 insertions(+), 1 deletion(-)
> >
> > diff --git a/hw/display/qxl.c b/hw/display/qxl.c
> > index f608abc769..63144f42b4 100644
> > --- a/hw/display/qxl.c
> > +++ b/hw/display/qxl.c
> > @@ -2184,6 +2184,14 @@ static void qxl_realize_common(PCIQXLDevice *qxl,
> > Error **errp)
> > SPICE_INTERFACE_QXL_MAJOR, SPICE_INTERFACE_QXL_MINOR);
> > return;
> > }
> > +
> > +#if SPICE_SERVER_VERSION >= 0x000e02 /* release 0.14.2 */
> > + // register all possible device display IDs to SPICE server
> > + for (int i = 0; i < qxl->max_outputs; ++i) {
> > + spice_qxl_monitor_set_device_display_id(&qxl->ssd.qxl, i, i);
> > + }
> > +#endif
> > +
>
> I think would be better if this were the default in spice-server.
I don't know what you mean by this...
> > qemu_add_vm_change_state_handler(qxl_vm_change_state_handler, qxl);
> >
> > qxl->update_irq = qemu_bh_new(qxl_update_irq_bh, qxl);
> > diff --git a/ui/spice-core.c b/ui/spice-core.c
> > index a4fbbc3898..2e01beea03 100644
> > --- a/ui/spice-core.c
> > +++ b/ui/spice-core.c
> > @@ -35,6 +35,8 @@
> > #include "qemu/option.h"
> > #include "migration/misc.h"
> > #include "hw/hw.h"
> > +#include "hw/pci/pci.h"
> > +#include "hw/pci/pci_bus.h"
> > #include "ui/spice-display.h"
> >
> > /* core bits */
> > @@ -871,6 +873,26 @@ bool qemu_spice_have_display_interface(QemuConsole
> > *con)
> > return false;
> > }
> >
> > +/*
> > + * Recursively (in reverse order) appends addresses of PCI devices as it
> > moves
> > + * up in the PCI hierarchy.
> > + *
> > + * @returns true on success, false when the buffer wasn't large enough
> > + */
> > +static bool append_pci_address_recursive(char *buf, size_t buf_size, const
> > PCIDevice *pci)
>
> I won't use the "_recursive" in the name, looks like more an implementation
> detail.
Allright.
> > +{
> > + PCIBus *bus = pci_get_bus(pci);
> > + if (!pci_bus_is_root(bus)) {
> > + append_pci_address_recursive(buf, buf_size, bus->parent_dev);
> > + }
> > +
> > + size_t len = strlen(buf);
> > + size_t written = snprintf(buf + len, buf_size - len, "/%02x.%x",
> > + PCI_SLOT(pci->devfn), PCI_FUNC(pci->devfn));
> > +
> > + return written > 0 && written < buf_size - len;
>
> written is always > 0, unless there's a bug in snprintf. Note that Qemu uses
> MingW snprintf on Windows so even on Windows this returns always > 0 (note
> that snprintf returns an int which is signed while size_t is unsigned and
> some implementation could return < 0, but not in Qemu).
Right. The man page says it returns negative values on errors. I've
missed the fact I'm storing the result in size_t. Do you think I should
drop the "written > 0" condition or change the type of "written" to
ssize_t for extra safety? :)
> > +}
> > +
> > int qemu_spice_add_display_interface(QXLInstance *qxlin, QemuConsole *con)
> > {
> > if (g_slist_find(spice_consoles, con)) {
> > @@ -878,7 +900,28 @@ int qemu_spice_add_display_interface(QXLInstance
> > *qxlin,
> > QemuConsole *con)
> > }
> > qxlin->id = qemu_console_get_index(con);
> > spice_consoles = g_slist_append(spice_consoles, con);
> > - return qemu_spice_add_interface(&qxlin->base);
> > + int res = qemu_spice_add_interface(&qxlin->base);
> > +
> > +#if SPICE_SERVER_VERSION >= 0x000e02 /* release 0.14.2 */
> > + DeviceState *dev = DEVICE(object_property_get_link(OBJECT(con),
> > "device", &error_abort));
> > + PCIDevice *pci = (PCIDevice *) object_dynamic_cast(OBJECT(dev),
> > TYPE_PCI_DEVICE);
> > +
> > + if (pci == NULL) {
> > + warn_report("Setting PCI path of a display device to SPICE: Not a
> > PCI device.");
> > + return res;
> > + }
> > +
> > + char device_path[128] = "pci/0000"; // hardcoded PCI domain 0000
> > + if (!append_pci_address_recursive(device_path, sizeof(device_path),
> > pci)) {
> > + warn_report("Setting PCI path of a display device to SPICE: "
> > + "Too many PCI devices in the chain.");
> > + return res;
> > + }
> > +
> > + spice_qxl_set_device_address(qxlin, device_path);
> > +#endif
> > +
> > + return res;
> > }
> >
> > static int qemu_spice_set_ticket(bool fail_if_conn, bool
> > disconnect_if_conn)
> > diff --git a/ui/spice-display.c b/ui/spice-display.c
> > index 2f8adb6b9f..f620750803 100644
> > --- a/ui/spice-display.c
> > +++ b/ui/spice-display.c
> > @@ -1129,6 +1129,11 @@ static void qemu_spice_display_init_one(QemuConsole
> > *con)
> >
> > ssd->qxl.base.sif = &dpy_interface.base;
> > qemu_spice_add_display_interface(&ssd->qxl, con);
> > +
> > +#if SPICE_SERVER_VERSION >= 0x000e02 /* release 0.14.2 */
>
> Surely OT: won't be better to have something like
>
> #if SPICE_SERVER_VERSION >= SPICE_SERVER_VERSION_NUMBER(0,14,2)
It surely would be better :)
Cheers,
Lukas
> > + spice_qxl_monitor_set_device_display_id(&ssd->qxl, 0,
> > qemu_console_get_head(con));
> > +#endif
> > +
> > qemu_spice_create_host_memslot(ssd);
> >
> > register_displaychangelistener(&ssd->dcl);
>
> Frediano
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