[13/16] xen: convert "-machine igd-passthru" to an accelerator property
diff mbox series

Message ID 1573655945-14912-14-git-send-email-pbonzini@redhat.com
State New
Headers show
Series
  • Complete the implementation of -accel
Related show

Commit Message

Paolo Bonzini Nov. 13, 2019, 2:39 p.m. UTC
The first machine property to fall is Xen's Intel integrated graphics
passthrough.  The "-machine igd-passthru" option does not set anymore
a property on the machine object, but desugars to a GlobalProperty on
accelerator objects.

The setter is very simple, since the value ends up in a
global variable, so this patch also provides an example before the more
complicated cases that follow it.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/core/machine.c   | 20 --------------------
 hw/xen/xen-common.c | 16 ++++++++++++++++
 include/hw/boards.h |  1 -
 qemu-options.hx     |  9 +++++----
 vl.c                | 14 ++++----------
 5 files changed, 25 insertions(+), 35 deletions(-)

Comments

Paul Durrant Nov. 14, 2019, 9:39 a.m. UTC | #1
On Wed, 13 Nov 2019 at 14:53, Paolo Bonzini <pbonzini@redhat.com> wrote:
>
> The first machine property to fall is Xen's Intel integrated graphics
> passthrough.  The "-machine igd-passthru" option does not set anymore
> a property on the machine object, but desugars to a GlobalProperty on
> accelerator objects.
>
> The setter is very simple, since the value ends up in a
> global variable, so this patch also provides an example before the more
> complicated cases that follow it.
>
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Did something go wrong with get_maintainers here? The Xen maintainers
ought to have been cc-ed. The Xen toolstack will require consequent
modification.

Cc-ing (rest of) Xen maintainers and xen-devel manually.

  Paul

> ---
>  hw/core/machine.c   | 20 --------------------
>  hw/xen/xen-common.c | 16 ++++++++++++++++
>  include/hw/boards.h |  1 -
>  qemu-options.hx     |  9 +++++----
>  vl.c                | 14 ++++----------
>  5 files changed, 25 insertions(+), 35 deletions(-)
>
> diff --git a/hw/core/machine.c b/hw/core/machine.c
> index 45ddfb6..d7a0356 100644
> --- a/hw/core/machine.c
> +++ b/hw/core/machine.c
> @@ -412,20 +412,6 @@ static void machine_set_graphics(Object *obj, bool value, Error **errp)
>      ms->enable_graphics = value;
>  }
>
> -static bool machine_get_igd_gfx_passthru(Object *obj, Error **errp)
> -{
> -    MachineState *ms = MACHINE(obj);
> -
> -    return ms->igd_gfx_passthru;
> -}
> -
> -static void machine_set_igd_gfx_passthru(Object *obj, bool value, Error **errp)
> -{
> -    MachineState *ms = MACHINE(obj);
> -
> -    ms->igd_gfx_passthru = value;
> -}
> -
>  static char *machine_get_firmware(Object *obj, Error **errp)
>  {
>      MachineState *ms = MACHINE(obj);
> @@ -862,12 +848,6 @@ static void machine_class_init(ObjectClass *oc, void *data)
>      object_class_property_set_description(oc, "graphics",
>          "Set on/off to enable/disable graphics emulation", &error_abort);
>
> -    object_class_property_add_bool(oc, "igd-passthru",
> -        machine_get_igd_gfx_passthru, machine_set_igd_gfx_passthru,
> -        &error_abort);
> -    object_class_property_set_description(oc, "igd-passthru",
> -        "Set on/off to enable/disable igd passthrou", &error_abort);
> -
>      object_class_property_add_str(oc, "firmware",
>          machine_get_firmware, machine_set_firmware,
>          &error_abort);
> diff --git a/hw/xen/xen-common.c b/hw/xen/xen-common.c
> index 5284b0d..6cba30c 100644
> --- a/hw/xen/xen-common.c
> +++ b/hw/xen/xen-common.c
> @@ -124,6 +124,16 @@ static void xen_change_state_handler(void *opaque, int running,
>      }
>  }
>
> +static bool xen_get_igd_gfx_passthru(Object *obj, Error **errp)
> +{
> +    return has_igd_gfx_passthru;
> +}
> +
> +static void xen_set_igd_gfx_passthru(Object *obj, bool value, Error **errp)
> +{
> +    has_igd_gfx_passthru = value;
> +}
> +
>  static void xen_setup_post(MachineState *ms, AccelState *accel)
>  {
>      int rc;
> @@ -177,6 +187,12 @@ static void xen_accel_class_init(ObjectClass *oc, void *data)
>      ac->compat_props = g_ptr_array_new();
>
>      compat_props_add(ac->compat_props, compat, G_N_ELEMENTS(compat));
> +
> +    object_class_property_add_bool(oc, "igd-passthru",
> +        xen_get_igd_gfx_passthru, xen_set_igd_gfx_passthru,
> +        &error_abort);
> +    object_class_property_set_description(oc, "igd-passthru",
> +        "Set on/off to enable/disable igd passthrou", &error_abort);
>  }
>
>  #define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen")
> diff --git a/include/hw/boards.h b/include/hw/boards.h
> index 36fcbda..cdcf481 100644
> --- a/include/hw/boards.h
> +++ b/include/hw/boards.h
> @@ -287,7 +287,6 @@ struct MachineState {
>      bool mem_merge;
>      bool usb;
>      bool usb_disabled;
> -    bool igd_gfx_passthru;
>      char *firmware;
>      bool iommu;
>      bool suppress_vmdesc;
> diff --git a/qemu-options.hx b/qemu-options.hx
> index 3931f90..5b43a83 100644
> --- a/qemu-options.hx
> +++ b/qemu-options.hx
> @@ -37,7 +37,6 @@ DEF("machine", HAS_ARG, QEMU_OPTION_machine, \
>      "                kvm_shadow_mem=size of KVM shadow MMU in bytes\n"
>      "                dump-guest-core=on|off include guest memory in a core dump (default=on)\n"
>      "                mem-merge=on|off controls memory merge support (default: on)\n"
> -    "                igd-passthru=on|off controls IGD GFX passthrough support (default=off)\n"
>      "                aes-key-wrap=on|off controls support for AES key wrapping (default=on)\n"
>      "                dea-key-wrap=on|off controls support for DEA key wrapping (default=on)\n"
>      "                suppress-vmdesc=on|off disables self-describing migration (default=off)\n"
> @@ -71,8 +70,6 @@ more than one accelerator specified, the next one is used if the previous one
>  fails to initialize.
>  @item kernel_irqchip=on|off
>  Controls in-kernel irqchip support for the chosen accelerator when available.
> -@item gfx_passthru=on|off
> -Enables IGD GFX passthrough support for the chosen machine when available.
>  @item vmport=on|off|auto
>  Enables emulation of VMWare IO port, for vmmouse etc. auto says to select the
>  value based on accel. For accel=xen the default is off otherwise the default
> @@ -118,8 +115,9 @@ Select CPU model (@code{-cpu help} for list and additional feature selection)
>  ETEXI
>
>  DEF("accel", HAS_ARG, QEMU_OPTION_accel,
> -    "-accel [accel=]accelerator[,thread=single|multi]\n"
> +    "-accel [accel=]accelerator[,prop[=value][,...]]\n"
>      "                select accelerator (kvm, xen, hax, hvf, whpx or tcg; use 'help' for a list)\n"
> +    "                igd-passthru=on|off (enable Xen integrated Intel graphics passthrough, default=off)\n"
>      "                tb-size=n (TCG translation block cache size)\n"
>      "                thread=single|multi (enable multi-threaded TCG)\n", QEMU_ARCH_ALL)
>  STEXI
> @@ -130,6 +128,9 @@ kvm, xen, hax, hvf, whpx or tcg can be available. By default, tcg is used. If th
>  more than one accelerator specified, the next one is used if the previous one
>  fails to initialize.
>  @table @option
> +@item igd-passthru=on|off
> +When Xen is in use, this option controls whether Intel integrated graphics
> +devices can be passed through to the guest (default=off)
>  @item tb-size=@var{n}
>  Controls the size (in MiB) of the TCG translation block cache.
>  @item thread=single|multi
> diff --git a/vl.c b/vl.c
> index 06c6ad9..7d8fed1 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -1256,13 +1256,6 @@ static void configure_msg(QemuOpts *opts)
>  }
>
>
> -/* Now we still need this for compatibility with XEN. */
> -bool has_igd_gfx_passthru;
> -static void igd_gfx_passthru(void)
> -{
> -    has_igd_gfx_passthru = current_machine->igd_gfx_passthru;
> -}
> -
>  /***********************************************************/
>  /* USB devices */
>
> @@ -2645,6 +2638,10 @@ static int machine_set_property(void *opaque,
>      if (g_str_equal(qom_name, "accel")) {
>          return 0;
>      }
> +    if (g_str_equal(qom_name, "igd-passthru")) {
> +        object_register_sugar_prop(ACCEL_CLASS_NAME("xen"), qom_name, value);
> +        return 0;
> +    }
>
>      r = object_parse_property_opt(opaque, name, value, "type", errp);
>      g_free(qom_name);
> @@ -4449,9 +4446,6 @@ int main(int argc, char **argv, char **envp)
>              exit(1);
>      }
>
> -    /* Check if IGD GFX passthrough. */
> -    igd_gfx_passthru();
> -
>      /* init generic devices */
>      rom_set_order_override(FW_CFG_ORDER_OVERRIDE_DEVICE);
>      qemu_opts_foreach(qemu_find_opts("device"),
> --
> 1.8.3.1
>
>
>
Paolo Bonzini Nov. 14, 2019, 9:47 a.m. UTC | #2
On 14/11/19 10:39, Paul Durrant wrote:
> On Wed, 13 Nov 2019 at 14:53, Paolo Bonzini <pbonzini@redhat.com> wrote:
>>
>> The first machine property to fall is Xen's Intel integrated graphics
>> passthrough.  The "-machine igd-passthru" option does not set anymore
>> a property on the machine object, but desugars to a GlobalProperty on
>> accelerator objects.
>>
>> The setter is very simple, since the value ends up in a
>> global variable, so this patch also provides an example before the more
>> complicated cases that follow it.
>>
>> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> 
> Did something go wrong with get_maintainers here? The Xen maintainers
> ought to have been cc-ed. The Xen toolstack will require consequent
> modification.

No, I just didn't use getmaintainers, my bad.  But backwards-compatible
syntactic sugar is provided, so no modifications are needed to Xen.  See
here in the code:

+    if (g_str_equal(qom_name, "igd-passthru")) {
+        object_register_sugar_prop(ACCEL_CLASS_NAME("xen"), qom_name, value);
+        return 0;
+    }

Paolo

> Cc-ing (rest of) Xen maintainers and xen-devel manually.
> 
>   Paul
> 
>> ---
>>  hw/core/machine.c   | 20 --------------------
>>  hw/xen/xen-common.c | 16 ++++++++++++++++
>>  include/hw/boards.h |  1 -
>>  qemu-options.hx     |  9 +++++----
>>  vl.c                | 14 ++++----------
>>  5 files changed, 25 insertions(+), 35 deletions(-)
>>
>> diff --git a/hw/core/machine.c b/hw/core/machine.c
>> index 45ddfb6..d7a0356 100644
>> --- a/hw/core/machine.c
>> +++ b/hw/core/machine.c
>> @@ -412,20 +412,6 @@ static void machine_set_graphics(Object *obj, bool value, Error **errp)
>>      ms->enable_graphics = value;
>>  }
>>
>> -static bool machine_get_igd_gfx_passthru(Object *obj, Error **errp)
>> -{
>> -    MachineState *ms = MACHINE(obj);
>> -
>> -    return ms->igd_gfx_passthru;
>> -}
>> -
>> -static void machine_set_igd_gfx_passthru(Object *obj, bool value, Error **errp)
>> -{
>> -    MachineState *ms = MACHINE(obj);
>> -
>> -    ms->igd_gfx_passthru = value;
>> -}
>> -
>>  static char *machine_get_firmware(Object *obj, Error **errp)
>>  {
>>      MachineState *ms = MACHINE(obj);
>> @@ -862,12 +848,6 @@ static void machine_class_init(ObjectClass *oc, void *data)
>>      object_class_property_set_description(oc, "graphics",
>>          "Set on/off to enable/disable graphics emulation", &error_abort);
>>
>> -    object_class_property_add_bool(oc, "igd-passthru",
>> -        machine_get_igd_gfx_passthru, machine_set_igd_gfx_passthru,
>> -        &error_abort);
>> -    object_class_property_set_description(oc, "igd-passthru",
>> -        "Set on/off to enable/disable igd passthrou", &error_abort);
>> -
>>      object_class_property_add_str(oc, "firmware",
>>          machine_get_firmware, machine_set_firmware,
>>          &error_abort);
>> diff --git a/hw/xen/xen-common.c b/hw/xen/xen-common.c
>> index 5284b0d..6cba30c 100644
>> --- a/hw/xen/xen-common.c
>> +++ b/hw/xen/xen-common.c
>> @@ -124,6 +124,16 @@ static void xen_change_state_handler(void *opaque, int running,
>>      }
>>  }
>>
>> +static bool xen_get_igd_gfx_passthru(Object *obj, Error **errp)
>> +{
>> +    return has_igd_gfx_passthru;
>> +}
>> +
>> +static void xen_set_igd_gfx_passthru(Object *obj, bool value, Error **errp)
>> +{
>> +    has_igd_gfx_passthru = value;
>> +}
>> +
>>  static void xen_setup_post(MachineState *ms, AccelState *accel)
>>  {
>>      int rc;
>> @@ -177,6 +187,12 @@ static void xen_accel_class_init(ObjectClass *oc, void *data)
>>      ac->compat_props = g_ptr_array_new();
>>
>>      compat_props_add(ac->compat_props, compat, G_N_ELEMENTS(compat));
>> +
>> +    object_class_property_add_bool(oc, "igd-passthru",
>> +        xen_get_igd_gfx_passthru, xen_set_igd_gfx_passthru,
>> +        &error_abort);
>> +    object_class_property_set_description(oc, "igd-passthru",
>> +        "Set on/off to enable/disable igd passthrou", &error_abort);
>>  }
>>
>>  #define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen")
>> diff --git a/include/hw/boards.h b/include/hw/boards.h
>> index 36fcbda..cdcf481 100644
>> --- a/include/hw/boards.h
>> +++ b/include/hw/boards.h
>> @@ -287,7 +287,6 @@ struct MachineState {
>>      bool mem_merge;
>>      bool usb;
>>      bool usb_disabled;
>> -    bool igd_gfx_passthru;
>>      char *firmware;
>>      bool iommu;
>>      bool suppress_vmdesc;
>> diff --git a/qemu-options.hx b/qemu-options.hx
>> index 3931f90..5b43a83 100644
>> --- a/qemu-options.hx
>> +++ b/qemu-options.hx
>> @@ -37,7 +37,6 @@ DEF("machine", HAS_ARG, QEMU_OPTION_machine, \
>>      "                kvm_shadow_mem=size of KVM shadow MMU in bytes\n"
>>      "                dump-guest-core=on|off include guest memory in a core dump (default=on)\n"
>>      "                mem-merge=on|off controls memory merge support (default: on)\n"
>> -    "                igd-passthru=on|off controls IGD GFX passthrough support (default=off)\n"
>>      "                aes-key-wrap=on|off controls support for AES key wrapping (default=on)\n"
>>      "                dea-key-wrap=on|off controls support for DEA key wrapping (default=on)\n"
>>      "                suppress-vmdesc=on|off disables self-describing migration (default=off)\n"
>> @@ -71,8 +70,6 @@ more than one accelerator specified, the next one is used if the previous one
>>  fails to initialize.
>>  @item kernel_irqchip=on|off
>>  Controls in-kernel irqchip support for the chosen accelerator when available.
>> -@item gfx_passthru=on|off
>> -Enables IGD GFX passthrough support for the chosen machine when available.
>>  @item vmport=on|off|auto
>>  Enables emulation of VMWare IO port, for vmmouse etc. auto says to select the
>>  value based on accel. For accel=xen the default is off otherwise the default
>> @@ -118,8 +115,9 @@ Select CPU model (@code{-cpu help} for list and additional feature selection)
>>  ETEXI
>>
>>  DEF("accel", HAS_ARG, QEMU_OPTION_accel,
>> -    "-accel [accel=]accelerator[,thread=single|multi]\n"
>> +    "-accel [accel=]accelerator[,prop[=value][,...]]\n"
>>      "                select accelerator (kvm, xen, hax, hvf, whpx or tcg; use 'help' for a list)\n"
>> +    "                igd-passthru=on|off (enable Xen integrated Intel graphics passthrough, default=off)\n"
>>      "                tb-size=n (TCG translation block cache size)\n"
>>      "                thread=single|multi (enable multi-threaded TCG)\n", QEMU_ARCH_ALL)
>>  STEXI
>> @@ -130,6 +128,9 @@ kvm, xen, hax, hvf, whpx or tcg can be available. By default, tcg is used. If th
>>  more than one accelerator specified, the next one is used if the previous one
>>  fails to initialize.
>>  @table @option
>> +@item igd-passthru=on|off
>> +When Xen is in use, this option controls whether Intel integrated graphics
>> +devices can be passed through to the guest (default=off)
>>  @item tb-size=@var{n}
>>  Controls the size (in MiB) of the TCG translation block cache.
>>  @item thread=single|multi
>> diff --git a/vl.c b/vl.c
>> index 06c6ad9..7d8fed1 100644
>> --- a/vl.c
>> +++ b/vl.c
>> @@ -1256,13 +1256,6 @@ static void configure_msg(QemuOpts *opts)
>>  }
>>
>>
>> -/* Now we still need this for compatibility with XEN. */
>> -bool has_igd_gfx_passthru;
>> -static void igd_gfx_passthru(void)
>> -{
>> -    has_igd_gfx_passthru = current_machine->igd_gfx_passthru;
>> -}
>> -
>>  /***********************************************************/
>>  /* USB devices */
>>
>> @@ -2645,6 +2638,10 @@ static int machine_set_property(void *opaque,
>>      if (g_str_equal(qom_name, "accel")) {
>>          return 0;
>>      }
>> +    if (g_str_equal(qom_name, "igd-passthru")) {
>> +        object_register_sugar_prop(ACCEL_CLASS_NAME("xen"), qom_name, value);
>> +        return 0;
>> +    }
>>
>>      r = object_parse_property_opt(opaque, name, value, "type", errp);
>>      g_free(qom_name);
>> @@ -4449,9 +4446,6 @@ int main(int argc, char **argv, char **envp)
>>              exit(1);
>>      }
>>
>> -    /* Check if IGD GFX passthrough. */
>> -    igd_gfx_passthru();
>> -
>>      /* init generic devices */
>>      rom_set_order_override(FW_CFG_ORDER_OVERRIDE_DEVICE);
>>      qemu_opts_foreach(qemu_find_opts("device"),
>> --
>> 1.8.3.1
>>
>>
>>
>
Paul Durrant Nov. 14, 2019, 9:52 a.m. UTC | #3
On Thu, 14 Nov 2019 at 09:47, Paolo Bonzini <pbonzini@redhat.com> wrote:
>
> On 14/11/19 10:39, Paul Durrant wrote:
> > On Wed, 13 Nov 2019 at 14:53, Paolo Bonzini <pbonzini@redhat.com> wrote:
> >>
> >> The first machine property to fall is Xen's Intel integrated graphics
> >> passthrough.  The "-machine igd-passthru" option does not set anymore
> >> a property on the machine object, but desugars to a GlobalProperty on
> >> accelerator objects.
> >>
> >> The setter is very simple, since the value ends up in a
> >> global variable, so this patch also provides an example before the more
> >> complicated cases that follow it.
> >>
> >> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> >
> > Did something go wrong with get_maintainers here? The Xen maintainers
> > ought to have been cc-ed. The Xen toolstack will require consequent
> > modification.
>
> No, I just didn't use getmaintainers, my bad.  But backwards-compatible
> syntactic sugar is provided, so no modifications are needed to Xen.  See
> here in the code:
>
> +    if (g_str_equal(qom_name, "igd-passthru")) {
> +        object_register_sugar_prop(ACCEL_CLASS_NAME("xen"), qom_name, value);
> +        return 0;
> +    }

Ah, no immediate danger. Thanks for pointing this out.

Cheers,
  Paul

>
> Paolo
>
> > Cc-ing (rest of) Xen maintainers and xen-devel manually.
> >
> >   Paul
> >
> >> ---
> >>  hw/core/machine.c   | 20 --------------------
> >>  hw/xen/xen-common.c | 16 ++++++++++++++++
> >>  include/hw/boards.h |  1 -
> >>  qemu-options.hx     |  9 +++++----
> >>  vl.c                | 14 ++++----------
> >>  5 files changed, 25 insertions(+), 35 deletions(-)
> >>
> >> diff --git a/hw/core/machine.c b/hw/core/machine.c
> >> index 45ddfb6..d7a0356 100644
> >> --- a/hw/core/machine.c
> >> +++ b/hw/core/machine.c
> >> @@ -412,20 +412,6 @@ static void machine_set_graphics(Object *obj, bool value, Error **errp)
> >>      ms->enable_graphics = value;
> >>  }
> >>
> >> -static bool machine_get_igd_gfx_passthru(Object *obj, Error **errp)
> >> -{
> >> -    MachineState *ms = MACHINE(obj);
> >> -
> >> -    return ms->igd_gfx_passthru;
> >> -}
> >> -
> >> -static void machine_set_igd_gfx_passthru(Object *obj, bool value, Error **errp)
> >> -{
> >> -    MachineState *ms = MACHINE(obj);
> >> -
> >> -    ms->igd_gfx_passthru = value;
> >> -}
> >> -
> >>  static char *machine_get_firmware(Object *obj, Error **errp)
> >>  {
> >>      MachineState *ms = MACHINE(obj);
> >> @@ -862,12 +848,6 @@ static void machine_class_init(ObjectClass *oc, void *data)
> >>      object_class_property_set_description(oc, "graphics",
> >>          "Set on/off to enable/disable graphics emulation", &error_abort);
> >>
> >> -    object_class_property_add_bool(oc, "igd-passthru",
> >> -        machine_get_igd_gfx_passthru, machine_set_igd_gfx_passthru,
> >> -        &error_abort);
> >> -    object_class_property_set_description(oc, "igd-passthru",
> >> -        "Set on/off to enable/disable igd passthrou", &error_abort);
> >> -
> >>      object_class_property_add_str(oc, "firmware",
> >>          machine_get_firmware, machine_set_firmware,
> >>          &error_abort);
> >> diff --git a/hw/xen/xen-common.c b/hw/xen/xen-common.c
> >> index 5284b0d..6cba30c 100644
> >> --- a/hw/xen/xen-common.c
> >> +++ b/hw/xen/xen-common.c
> >> @@ -124,6 +124,16 @@ static void xen_change_state_handler(void *opaque, int running,
> >>      }
> >>  }
> >>
> >> +static bool xen_get_igd_gfx_passthru(Object *obj, Error **errp)
> >> +{
> >> +    return has_igd_gfx_passthru;
> >> +}
> >> +
> >> +static void xen_set_igd_gfx_passthru(Object *obj, bool value, Error **errp)
> >> +{
> >> +    has_igd_gfx_passthru = value;
> >> +}
> >> +
> >>  static void xen_setup_post(MachineState *ms, AccelState *accel)
> >>  {
> >>      int rc;
> >> @@ -177,6 +187,12 @@ static void xen_accel_class_init(ObjectClass *oc, void *data)
> >>      ac->compat_props = g_ptr_array_new();
> >>
> >>      compat_props_add(ac->compat_props, compat, G_N_ELEMENTS(compat));
> >> +
> >> +    object_class_property_add_bool(oc, "igd-passthru",
> >> +        xen_get_igd_gfx_passthru, xen_set_igd_gfx_passthru,
> >> +        &error_abort);
> >> +    object_class_property_set_description(oc, "igd-passthru",
> >> +        "Set on/off to enable/disable igd passthrou", &error_abort);
> >>  }
> >>
> >>  #define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen")
> >> diff --git a/include/hw/boards.h b/include/hw/boards.h
> >> index 36fcbda..cdcf481 100644
> >> --- a/include/hw/boards.h
> >> +++ b/include/hw/boards.h
> >> @@ -287,7 +287,6 @@ struct MachineState {
> >>      bool mem_merge;
> >>      bool usb;
> >>      bool usb_disabled;
> >> -    bool igd_gfx_passthru;
> >>      char *firmware;
> >>      bool iommu;
> >>      bool suppress_vmdesc;
> >> diff --git a/qemu-options.hx b/qemu-options.hx
> >> index 3931f90..5b43a83 100644
> >> --- a/qemu-options.hx
> >> +++ b/qemu-options.hx
> >> @@ -37,7 +37,6 @@ DEF("machine", HAS_ARG, QEMU_OPTION_machine, \
> >>      "                kvm_shadow_mem=size of KVM shadow MMU in bytes\n"
> >>      "                dump-guest-core=on|off include guest memory in a core dump (default=on)\n"
> >>      "                mem-merge=on|off controls memory merge support (default: on)\n"
> >> -    "                igd-passthru=on|off controls IGD GFX passthrough support (default=off)\n"
> >>      "                aes-key-wrap=on|off controls support for AES key wrapping (default=on)\n"
> >>      "                dea-key-wrap=on|off controls support for DEA key wrapping (default=on)\n"
> >>      "                suppress-vmdesc=on|off disables self-describing migration (default=off)\n"
> >> @@ -71,8 +70,6 @@ more than one accelerator specified, the next one is used if the previous one
> >>  fails to initialize.
> >>  @item kernel_irqchip=on|off
> >>  Controls in-kernel irqchip support for the chosen accelerator when available.
> >> -@item gfx_passthru=on|off
> >> -Enables IGD GFX passthrough support for the chosen machine when available.
> >>  @item vmport=on|off|auto
> >>  Enables emulation of VMWare IO port, for vmmouse etc. auto says to select the
> >>  value based on accel. For accel=xen the default is off otherwise the default
> >> @@ -118,8 +115,9 @@ Select CPU model (@code{-cpu help} for list and additional feature selection)
> >>  ETEXI
> >>
> >>  DEF("accel", HAS_ARG, QEMU_OPTION_accel,
> >> -    "-accel [accel=]accelerator[,thread=single|multi]\n"
> >> +    "-accel [accel=]accelerator[,prop[=value][,...]]\n"
> >>      "                select accelerator (kvm, xen, hax, hvf, whpx or tcg; use 'help' for a list)\n"
> >> +    "                igd-passthru=on|off (enable Xen integrated Intel graphics passthrough, default=off)\n"
> >>      "                tb-size=n (TCG translation block cache size)\n"
> >>      "                thread=single|multi (enable multi-threaded TCG)\n", QEMU_ARCH_ALL)
> >>  STEXI
> >> @@ -130,6 +128,9 @@ kvm, xen, hax, hvf, whpx or tcg can be available. By default, tcg is used. If th
> >>  more than one accelerator specified, the next one is used if the previous one
> >>  fails to initialize.
> >>  @table @option
> >> +@item igd-passthru=on|off
> >> +When Xen is in use, this option controls whether Intel integrated graphics
> >> +devices can be passed through to the guest (default=off)
> >>  @item tb-size=@var{n}
> >>  Controls the size (in MiB) of the TCG translation block cache.
> >>  @item thread=single|multi
> >> diff --git a/vl.c b/vl.c
> >> index 06c6ad9..7d8fed1 100644
> >> --- a/vl.c
> >> +++ b/vl.c
> >> @@ -1256,13 +1256,6 @@ static void configure_msg(QemuOpts *opts)
> >>  }
> >>
> >>
> >> -/* Now we still need this for compatibility with XEN. */
> >> -bool has_igd_gfx_passthru;
> >> -static void igd_gfx_passthru(void)
> >> -{
> >> -    has_igd_gfx_passthru = current_machine->igd_gfx_passthru;
> >> -}
> >> -
> >>  /***********************************************************/
> >>  /* USB devices */
> >>
> >> @@ -2645,6 +2638,10 @@ static int machine_set_property(void *opaque,
> >>      if (g_str_equal(qom_name, "accel")) {
> >>          return 0;
> >>      }
> >> +    if (g_str_equal(qom_name, "igd-passthru")) {
> >> +        object_register_sugar_prop(ACCEL_CLASS_NAME("xen"), qom_name, value);
> >> +        return 0;
> >> +    }
> >>
> >>      r = object_parse_property_opt(opaque, name, value, "type", errp);
> >>      g_free(qom_name);
> >> @@ -4449,9 +4446,6 @@ int main(int argc, char **argv, char **envp)
> >>              exit(1);
> >>      }
> >>
> >> -    /* Check if IGD GFX passthrough. */
> >> -    igd_gfx_passthru();
> >> -
> >>      /* init generic devices */
> >>      rom_set_order_override(FW_CFG_ORDER_OVERRIDE_DEVICE);
> >>      qemu_opts_foreach(qemu_find_opts("device"),
> >> --
> >> 1.8.3.1
> >>
> >>
> >>
> >
>
Thomas Huth Nov. 19, 2019, 11:02 a.m. UTC | #4
On 13/11/2019 15.39, Paolo Bonzini wrote:
> The first machine property to fall is Xen's Intel integrated graphics
> passthrough.  The "-machine igd-passthru" option does not set anymore
> a property on the machine object, but desugars to a GlobalProperty on
> accelerator objects.
> 
> The setter is very simple, since the value ends up in a
> global variable, so this patch also provides an example before the more
> complicated cases that follow it.
> 
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---
>  hw/core/machine.c   | 20 --------------------
>  hw/xen/xen-common.c | 16 ++++++++++++++++
>  include/hw/boards.h |  1 -
>  qemu-options.hx     |  9 +++++----
>  vl.c                | 14 ++++----------
>  5 files changed, 25 insertions(+), 35 deletions(-)

Reviewed-by: Thomas Huth <thuth@redhat.com>

Patch
diff mbox series

diff --git a/hw/core/machine.c b/hw/core/machine.c
index 45ddfb6..d7a0356 100644
--- a/hw/core/machine.c
+++ b/hw/core/machine.c
@@ -412,20 +412,6 @@  static void machine_set_graphics(Object *obj, bool value, Error **errp)
     ms->enable_graphics = value;
 }
 
-static bool machine_get_igd_gfx_passthru(Object *obj, Error **errp)
-{
-    MachineState *ms = MACHINE(obj);
-
-    return ms->igd_gfx_passthru;
-}
-
-static void machine_set_igd_gfx_passthru(Object *obj, bool value, Error **errp)
-{
-    MachineState *ms = MACHINE(obj);
-
-    ms->igd_gfx_passthru = value;
-}
-
 static char *machine_get_firmware(Object *obj, Error **errp)
 {
     MachineState *ms = MACHINE(obj);
@@ -862,12 +848,6 @@  static void machine_class_init(ObjectClass *oc, void *data)
     object_class_property_set_description(oc, "graphics",
         "Set on/off to enable/disable graphics emulation", &error_abort);
 
-    object_class_property_add_bool(oc, "igd-passthru",
-        machine_get_igd_gfx_passthru, machine_set_igd_gfx_passthru,
-        &error_abort);
-    object_class_property_set_description(oc, "igd-passthru",
-        "Set on/off to enable/disable igd passthrou", &error_abort);
-
     object_class_property_add_str(oc, "firmware",
         machine_get_firmware, machine_set_firmware,
         &error_abort);
diff --git a/hw/xen/xen-common.c b/hw/xen/xen-common.c
index 5284b0d..6cba30c 100644
--- a/hw/xen/xen-common.c
+++ b/hw/xen/xen-common.c
@@ -124,6 +124,16 @@  static void xen_change_state_handler(void *opaque, int running,
     }
 }
 
+static bool xen_get_igd_gfx_passthru(Object *obj, Error **errp)
+{
+    return has_igd_gfx_passthru;
+}
+
+static void xen_set_igd_gfx_passthru(Object *obj, bool value, Error **errp)
+{
+    has_igd_gfx_passthru = value;
+}
+
 static void xen_setup_post(MachineState *ms, AccelState *accel)
 {
     int rc;
@@ -177,6 +187,12 @@  static void xen_accel_class_init(ObjectClass *oc, void *data)
     ac->compat_props = g_ptr_array_new();
 
     compat_props_add(ac->compat_props, compat, G_N_ELEMENTS(compat));
+
+    object_class_property_add_bool(oc, "igd-passthru",
+        xen_get_igd_gfx_passthru, xen_set_igd_gfx_passthru,
+        &error_abort);
+    object_class_property_set_description(oc, "igd-passthru",
+        "Set on/off to enable/disable igd passthrou", &error_abort);
 }
 
 #define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen")
diff --git a/include/hw/boards.h b/include/hw/boards.h
index 36fcbda..cdcf481 100644
--- a/include/hw/boards.h
+++ b/include/hw/boards.h
@@ -287,7 +287,6 @@  struct MachineState {
     bool mem_merge;
     bool usb;
     bool usb_disabled;
-    bool igd_gfx_passthru;
     char *firmware;
     bool iommu;
     bool suppress_vmdesc;
diff --git a/qemu-options.hx b/qemu-options.hx
index 3931f90..5b43a83 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -37,7 +37,6 @@  DEF("machine", HAS_ARG, QEMU_OPTION_machine, \
     "                kvm_shadow_mem=size of KVM shadow MMU in bytes\n"
     "                dump-guest-core=on|off include guest memory in a core dump (default=on)\n"
     "                mem-merge=on|off controls memory merge support (default: on)\n"
-    "                igd-passthru=on|off controls IGD GFX passthrough support (default=off)\n"
     "                aes-key-wrap=on|off controls support for AES key wrapping (default=on)\n"
     "                dea-key-wrap=on|off controls support for DEA key wrapping (default=on)\n"
     "                suppress-vmdesc=on|off disables self-describing migration (default=off)\n"
@@ -71,8 +70,6 @@  more than one accelerator specified, the next one is used if the previous one
 fails to initialize.
 @item kernel_irqchip=on|off
 Controls in-kernel irqchip support for the chosen accelerator when available.
-@item gfx_passthru=on|off
-Enables IGD GFX passthrough support for the chosen machine when available.
 @item vmport=on|off|auto
 Enables emulation of VMWare IO port, for vmmouse etc. auto says to select the
 value based on accel. For accel=xen the default is off otherwise the default
@@ -118,8 +115,9 @@  Select CPU model (@code{-cpu help} for list and additional feature selection)
 ETEXI
 
 DEF("accel", HAS_ARG, QEMU_OPTION_accel,
-    "-accel [accel=]accelerator[,thread=single|multi]\n"
+    "-accel [accel=]accelerator[,prop[=value][,...]]\n"
     "                select accelerator (kvm, xen, hax, hvf, whpx or tcg; use 'help' for a list)\n"
+    "                igd-passthru=on|off (enable Xen integrated Intel graphics passthrough, default=off)\n"
     "                tb-size=n (TCG translation block cache size)\n"
     "                thread=single|multi (enable multi-threaded TCG)\n", QEMU_ARCH_ALL)
 STEXI
@@ -130,6 +128,9 @@  kvm, xen, hax, hvf, whpx or tcg can be available. By default, tcg is used. If th
 more than one accelerator specified, the next one is used if the previous one
 fails to initialize.
 @table @option
+@item igd-passthru=on|off
+When Xen is in use, this option controls whether Intel integrated graphics
+devices can be passed through to the guest (default=off)
 @item tb-size=@var{n}
 Controls the size (in MiB) of the TCG translation block cache.
 @item thread=single|multi
diff --git a/vl.c b/vl.c
index 06c6ad9..7d8fed1 100644
--- a/vl.c
+++ b/vl.c
@@ -1256,13 +1256,6 @@  static void configure_msg(QemuOpts *opts)
 }
 
 
-/* Now we still need this for compatibility with XEN. */
-bool has_igd_gfx_passthru;
-static void igd_gfx_passthru(void)
-{
-    has_igd_gfx_passthru = current_machine->igd_gfx_passthru;
-}
-
 /***********************************************************/
 /* USB devices */
 
@@ -2645,6 +2638,10 @@  static int machine_set_property(void *opaque,
     if (g_str_equal(qom_name, "accel")) {
         return 0;
     }
+    if (g_str_equal(qom_name, "igd-passthru")) {
+        object_register_sugar_prop(ACCEL_CLASS_NAME("xen"), qom_name, value);
+        return 0;
+    }
 
     r = object_parse_property_opt(opaque, name, value, "type", errp);
     g_free(qom_name);
@@ -4449,9 +4446,6 @@  int main(int argc, char **argv, char **envp)
             exit(1);
     }
 
-    /* Check if IGD GFX passthrough. */
-    igd_gfx_passthru();
-
     /* init generic devices */
     rom_set_order_override(FW_CFG_ORDER_OVERRIDE_DEVICE);
     qemu_opts_foreach(qemu_find_opts("device"),