Merge tag 'gpu-pull-request' of https://gitlab.com/marcandre.lureau/qemu into staging

GPU pull request

Includes:
- [PATCH] virtio-gpu-rutabaga: Add empty interface to fix arm64 crash
- [PATCH v2 0/

Merge tag 'gpu-pull-request' of https://gitlab.com/marcandre.lureau/qemu into staging

GPU pull request

Includes:
- [PATCH] virtio-gpu-rutabaga: Add empty interface to fix arm64 crash
- [PATCH v2 0/4] Misc ati-vga patches
- [PATCH v2 0/5] virtio-gpu: add blob migration support

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# gpg: issuer "marcandre.lureau@redhat.com"
# gpg: Good signature from "Marc-André Lureau <marcandre.lureau@redhat.com>" [full]
# gpg: aka "Marc-André Lureau <marcandre.lureau@gmail.com>" [full]
# Primary key fingerprint: 87A9 BD93 3F87 C606 D276 F62D DAE8 E109 7596 9CE5

* tag 'gpu-pull-request' of https://gitlab.com/marcandre.lureau/qemu:
Revert "virtio-gpu: block migration of VMs with blob=true"
virtio-gpu: add virtio-gpu/blob vmstate subsection
virtio-gpu: move scanout restoration to post_load
virtio-gpu: factor out restore mapping
virtio-gpu: block migration of VMs with blob=true
ati-vga: Implement fallback for pixman routines
ati-vga: Add 30 bit palette access register
ati-vga: Support unaligned access to GPIO DDC registers
ati-vga: Fix aperture sizes
virtio-gpu-rutabaga: Add empty interface to fix arm64 crash

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

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virtio-gpu-rutabaga: Add empty interface to fix arm64 crash

Add an empty element to the interfaces array, which is consistent with
the behavior of other devices in qemu and fixes the crash on arm64.

virtio-gpu-rutabaga: Add empty interface to fix arm64 crash

Add an empty element to the interfaces array, which is consistent with
the behavior of other devices in qemu and fixes the crash on arm64.

0 0x0000fffff5c18550 in () at /usr/lib64/libc.so.6
1 0x0000fffff6c9cd6c in g_strdup () at /usr/lib64/libglib-2.0.so.0
2 0x0000aaaaab4945d8 in g_strdup_inline (str=<optimized out>) at /usr/include/glib-2.0/glib/gstrfuncs.h:321
3 type_new (info=info@entry=0xaaaaabc1b2c8 <virtio_gpu_rutabaga_pci_info>) at ../qom/object.c:133
4 0x0000aaaaab494f14 in type_register_internal (info=0xaaaaabc1b2c8 <virtio_gpu_rutabaga_pci_info>) at ../qom/object.c:143
5 type_register (info=0xaaaaabc1b2c8 <virtio_gpu_rutabaga_pci_info>) at ../qom/object.c:152
6 type_register_static (info=0xaaaaabc1b2c8 <virtio_gpu_rutabaga_pci_info>) at ../qom/object.c:157
7 type_register_static_array (infos=<optimized out>, nr_infos=<optimized out>) at ../qom/object.c:165
8 0x0000aaaaab6147e8 in module_call_init (type=type@entry=MODULE_INIT_QOM) at ../util/module.c:109
9 0x0000aaaaab10a0ec in qemu_init_subsystems () at ../system/runstate.c:817
10 0x0000aaaaab10d334 in qemu_init (argc=13, argv=0xfffffffff198) at ../system/vl.c:2760
11 0x0000aaaaaae4da6c in main (argc=<optimized out>, argv=<optimized out>) at ../system/main.c:47

Signed-off-by: Cong Liu <liucong2@kylinos.cn>
Reviewed-by: Gurchetan Singh <gurchetansingh@chromium.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20231031012515.15504-1-liucong2@kylinos.cn>

show more ...

Merge tag 'gpu-pull-request' of https://gitlab.com/marcandre.lureau/qemu into staging

virtio-gpu rutabaga support

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Merge tag 'gpu-pull-request' of https://gitlab.com/marcandre.lureau/qemu into staging

virtio-gpu rutabaga support

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# gpg: using RSA key 87A9BD933F87C606D276F62DDAE8E10975969CE5
# gpg: issuer "marcandre.lureau@redhat.com"
# gpg: Good signature from "Marc-André Lureau <marcandre.lureau@redhat.com>" [full]
# gpg: aka "Marc-André Lureau <marcandre.lureau@gmail.com>" [full]
# Primary key fingerprint: 87A9 BD93 3F87 C606 D276 F62D DAE8 E109 7596 9CE5

* tag 'gpu-pull-request' of https://gitlab.com/marcandre.lureau/qemu:
docs/system: add basic virtio-gpu documentation
gfxstream + rutabaga: enable rutabaga
gfxstream + rutabaga: meson support
gfxstream + rutabaga: add initial support for gfxstream
gfxstream + rutabaga prep: added need defintions, fields, and options
virtio-gpu: blob prep
virtio-gpu: hostmem
virtio-gpu: CONTEXT_INIT feature
virtio: Add shared memory capability

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

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gfxstream + rutabaga: add initial support for gfxstream

This adds initial support for gfxstream and cross-domain. Both
features rely on virtio-gpu blob resources and context types, which
are also i

gfxstream + rutabaga: add initial support for gfxstream

This adds initial support for gfxstream and cross-domain. Both
features rely on virtio-gpu blob resources and context types, which
are also implemented in this patch.

gfxstream has a long and illustrious history in Android graphics
paravirtualization. It has been powering graphics in the Android
Studio Emulator for more than a decade, which is the main developer
platform.

Originally conceived by Jesse Hall, it was first known as "EmuGL" [a].
The key design characteristic was a 1:1 threading model and
auto-generation, which fit nicely with the OpenGLES spec. It also
allowed easy layering with ANGLE on the host, which provides the GLES
implementations on Windows or MacOS enviroments.

gfxstream has traditionally been maintained by a single engineer, and
between 2015 to 2021, the goldfish throne passed to Frank Yang.
Historians often remark this glorious reign ("pax gfxstreama" is the
academic term) was comparable to that of Augustus and both Queen
Elizabeths. Just to name a few accomplishments in a resplendent
panoply: higher versions of GLES, address space graphics, snapshot
support and CTS compliant Vulkan [b].

One major drawback was the use of out-of-tree goldfish drivers.
Android engineers didn't know much about DRM/KMS and especially TTM so
a simple guest to host pipe was conceived.

Luckily, virtio-gpu 3D started to emerge in 2016 due to the work of
the Mesa/virglrenderer communities. In 2018, the initial virtio-gpu
port of gfxstream was done by Cuttlefish enthusiast Alistair Delva.
It was a symbol compatible replacement of virglrenderer [c] and named
"AVDVirglrenderer". This implementation forms the basis of the
current gfxstream host implementation still in use today.

cross-domain support follows a similar arc. Originally conceived by
Wayland aficionado David Reveman and crosvm enjoyer Zach Reizner in
2018, it initially relied on the downstream "virtio-wl" device.

In 2020 and 2021, virtio-gpu was extended to include blob resources
and multiple timelines by yours truly, features gfxstream/cross-domain
both require to function correctly.

Right now, we stand at the precipice of a truly fantastic possibility:
the Android Emulator powered by upstream QEMU and upstream Linux
kernel. gfxstream will then be packaged properfully, and app
developers can even fix gfxstream bugs on their own if they encounter
them.

It's been quite the ride, my friends. Where will gfxstream head next,
nobody really knows. I wouldn't be surprised if it's around for
another decade, maintained by a new generation of Android graphics
enthusiasts.

Technical details:
- Very simple initial display integration: just used Pixman
- Largely, 1:1 mapping of virtio-gpu hypercalls to rutabaga function
calls

Next steps for Android VMs:
- The next step would be improving display integration and UI interfaces
with the goal of the QEMU upstream graphics being in an emulator
release [d].

Next steps for Linux VMs for display virtualization:
- For widespread distribution, someone needs to package Sommelier or the
wayland-proxy-virtwl [e] ideally into Debian main. In addition, newer
versions of the Linux kernel come with DRM_VIRTIO_GPU_KMS option,
which allows disabling KMS hypercalls. If anyone cares enough, it'll
probably be possible to build a custom VM variant that uses this display
virtualization strategy.

[a] https://android-review.googlesource.com/c/platform/development/+/34470
[b] https://android-review.googlesource.com/q/topic:%22vulkan-hostconnection-start%22
[c] https://android-review.googlesource.com/c/device/generic/goldfish-opengl/+/761927
[d] https://developer.android.com/studio/releases/emulator
[e] https://github.com/talex5/wayland-proxy-virtwl

Signed-off-by: Gurchetan Singh <gurchetansingh@chromium.org>
Tested-by: Alyssa Ross <hi@alyssa.is>
Tested-by: Emmanouil Pitsidianakis <manos.pitsidianakis@linaro.org>
Tested-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Emmanouil Pitsidianakis <manos.pitsidianakis@linaro.org>
Reviewed-by: Antonio Caggiano <quic_acaggian@quicinc.com>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>

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