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qemu/hw/display
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Peter Maydell 0fa57cbfa7 hw/display/virtio-gpu: Improve "opengl is not available" error message 
If the user tries to use the virtio-gpu-gl device but the display
backend doesn't have OpenGL support enabled, we currently print a
rather uninformative error message:

$ qemu-system-aarch64 -M virt -device virtio-gpu-gl
qemu-system-aarch64: -device virtio-gpu-gl: opengl is not available

Since OpenGL is not enabled on display frontends by default, users
are quite likely to run into this. Improve the error message to
be more specific and to suggest to the user a path forward.

Note that the case of "user tried to enable OpenGL but the display
backend doesn't handle it" is caught elsewhere first, so we can
assume that isn't the problem:

$ qemu-system-aarch64 -M virt -device virtio-gpu-gl -display curses,gl=on
qemu-system-aarch64: OpenGL is not supported by the display

(Use of error_append_hint() requires us to add an ERRP_GUARD() to
the function, as noted in include/qapi/error.h.)

With this commit we now produce the hopefully more helpful error:
$ ./build/x86/qemu-system-aarch64 -M virt -device virtio-gpu-gl
qemu-system-aarch64: -device virtio-gpu-gl: The display backend does not have OpenGL support enabled
It can be enabled with '-display BACKEND,gl=on' where BACKEND is the name of the display backend to use.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2443
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Acked-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-ID: <20240731154136.3494621-2-peter.maydell@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2024-08-06 16:22:12 +02:00
..
acpi-vga-stub.c acpi: pc: vga: use AcpiDevAmlIf interface to build VGA device descriptors 2022-11-07 14:00:29 -05:00
acpi-vga.c acpi: pc: vga: use AcpiDevAmlIf interface to build VGA device descriptors 2022-11-07 14:00:29 -05:00
artist.c hw/display: Constify VMState 2023-12-29 11:17:30 +11:00
ati_2d.c hw/display/ati: allow compiling without PIXMAN 2023-11-07 14:04:25 +04:00
ati_dbg.c ati-vga: Add 30 bit palette access register 2023-11-06 15:58:43 +04:00
ati_int.h ati-vga: Implement fallback for pixman routines 2023-11-06 15:58:45 +04:00
ati_regs.h ati-vga: Add 30 bit palette access register 2023-11-06 15:58:43 +04:00
ati.c ui/console: Convert mouse visibility parameter into bool 2024-07-16 20:04:08 +02:00
bcm2835_fb.c hw/display/bcm2835_fb: fix fb_use_offsets condition 2024-07-18 13:49:29 +01:00
blizzard.c hw/display: fix tab indentation 2022-11-08 10:23:32 +01:00
bochs-display.c hw/display: Constify VMState 2023-12-29 11:17:30 +11:00
cg3.c hw/display: Constify VMState 2023-12-29 11:17:30 +11:00
cirrus_vga_internal.h hw/display/cirrus_vga: Move "isa-cirrus-vga" device into a separate file 2018-10-15 09:57:33 +02:00
cirrus_vga_isa.c display: include dependencies explicitly 2022-11-10 10:17:18 -05:00
cirrus_vga_rop2.h cirrus: fix PUTPIXEL macro 2017-03-27 12:14:45 +02:00
cirrus_vga_rop.h cirrus: fix off-by-one in cirrus_bitblt_rop_bkwd_transp_*_16 2017-03-17 10:23:44 +01:00
cirrus_vga.c vga: implement horizontal pel panning in graphics modes 2024-01-18 10:43:13 +01:00
dm163.c hw/display : Add device DM163 2024-04-30 16:02:43 +01:00
dpcd.c hw/display: Constify VMState 2023-12-29 11:17:30 +11:00
edid-generate.c edid: Fix clock of Detailed Timing Descriptor 2022-03-04 11:31:46 +01:00
edid-region.c Include exec/memory.h slightly less 2019-08-16 13:31:52 +02:00
exynos4210_fimd.c hw/display/exynos4210_fimd: Pass frame buffer memory region as link 2024-02-26 18:40:09 +01:00
framebuffer.c Include hw/hw.h exactly where needed 2019-08-16 13:31:52 +02:00
framebuffer.h framebuffer: set DIRTY_MEMORY_VGA on RAM that is used for the framebuffer 2015-07-24 13:57:45 +02:00
g364fb.c hw/display: Constify VMState 2023-12-29 11:17:30 +11:00
i2c-ddc.c hw/display: Constify VMState 2023-12-29 11:17:30 +11:00
jazz_led.c hw/display: Constify VMState 2023-12-29 11:17:30 +11:00
Kconfig hw/display : Add device DM163 2024-04-30 16:02:43 +01:00
macfb.c hw/display/macfb: Fix missing ERRP_GUARD() in macfb_nubus_realize() 2024-03-12 11:45:33 +01:00
meson.build build: do not build virtio-vga-gl if virgl/opengl not available 2024-05-03 15:47:48 +02:00
next-fb.c hw/display/next-fb: Fix comment typo 2022-12-03 22:07:07 +01:00
omap_dss.c hw/arm/omap: Drop useless casts from void * to pointer 2023-01-12 17:15:09 +00:00
omap_lcdc.c hw/arm/omap: Drop useless casts from void * to pointer 2023-01-12 17:15:09 +00:00
pl110_template.h Replace config-time define HOST_WORDS_BIGENDIAN 2022-04-06 10:50:37 +02:00
pl110.c hw/display/pl110: Pass frame buffer memory region as link property 2024-02-26 18:39:58 +01:00
pxa2xx_lcd.c hw/display: Constify VMState 2023-12-29 11:17:30 +11:00
qxl-logger.c hw/display/qxl: Pass requested buffer size to qxl_phys2virt() 2022-11-29 18:15:26 -05:00
qxl-render.c ui/console: Remove dpy_cursor_define_supported() 2024-07-16 20:04:08 +02:00
qxl.c hw/display: Constify VMState 2023-12-29 11:17:30 +11:00
qxl.h Replace "iothread lock" with "BQL" in comments 2024-01-08 10:45:43 -05:00
ramfb-standalone.c hw/display: Constify VMState 2023-12-29 11:17:30 +11:00
ramfb-stubs.c ramfb: move stubs out of stubs/ 2024-04-18 11:17:27 +02:00
ramfb.c hw/display: Constify VMState 2023-12-29 11:17:30 +11:00
sii9022.c hw/display: Constify VMState 2023-12-29 11:17:30 +11:00
sm501.c hw/display: Constify VMState 2023-12-29 11:17:30 +11:00
ssd0303.c hw/display: Constify VMState 2023-12-29 11:17:30 +11:00
ssd0323.c hw/display: Constify VMState 2023-12-29 11:17:30 +11:00
tc6393xb.c Use g_new() & friends where that makes obvious sense 2022-03-21 15:44:44 +01:00
tcx.c hw/display: Constify VMState 2023-12-29 11:17:30 +11:00
trace-events hw/display : Add device DM163 2024-04-30 16:02:43 +01:00
trace.h trace: switch position of headers to what Meson requires 2020-08-21 06:18:24 -04:00
vga_int.h display: remove GraphicHwOps from typedefs.h 2024-05-03 15:47:48 +02:00
vga_regs.h vga: sort-of implement word and double-word access modes 2024-01-18 10:43:14 +01:00
vga-access.h vga: move access helpers to separate include file 2019-09-19 10:37:46 +02:00
vga-helpers.h vga: optimize horizontal pel panning in 256-color modes 2024-01-18 10:43:14 +01:00
vga-isa.c docs/specs/standard-vga: Convert to rST 2023-11-02 12:52:06 +00:00
vga-mmio.c display: include dependencies explicitly 2022-11-10 10:17:18 -05:00
vga-pci.c hw/display: Constify VMState 2023-12-29 11:17:30 +11:00
vga.c ui+display: rename is_buffer_shared() -> surface_is_allocated() 2024-06-19 12:42:03 +02:00
vhost-user-gpu-pci.c modules: introduces module_kconfig directive 2022-06-06 09:26:53 +02:00
vhost-user-gpu.c vhost-user-gpu: fix import of DMABUF 2024-07-01 17:16:04 -04:00
vhost-user-vga.c modules: introduces module_kconfig directive 2022-06-06 09:26:53 +02:00
virtio-dmabuf.c hw/display: fix memleak from virtio_add_resource 2023-10-22 05:18:16 -04:00
virtio-gpu-base.c Fix bugs when VM shutdown with virtio-gpu unplugged 2023-12-26 04:51:07 -05:00
virtio-gpu-gl.c hw/display/virtio-gpu: Improve "opengl is not available" error message 2024-08-06 16:22:12 +02:00
virtio-gpu-pci-gl.c modules: introduces module_kconfig directive 2022-06-06 09:26:53 +02:00
virtio-gpu-pci-rutabaga.c virtio-gpu-rutabaga: Add empty interface to fix arm64 crash 2023-11-06 14:25:30 +04:00
virtio-gpu-pci.c virtio-gpu: hostmem 2023-10-16 11:29:56 +04:00
virtio-gpu-rutabaga.c virtio-gpu-rutabaga.c: override resource_destroy method 2024-02-14 06:17:44 -05:00
virtio-gpu-udmabuf-stubs.c virtio-gpu: splitting one extended mode guest fb into n-scanouts 2021-11-05 12:29:19 +01:00
virtio-gpu-udmabuf.c ui/console: Use qemu_dmabuf_new() and free() helpers instead 2024-05-14 17:14:12 +04:00
virtio-gpu-virgl.c virtio-gpu: Correct virgl_renderer_resource_get_info() error check 2024-02-14 06:09:33 -05:00
virtio-gpu.c ui/console: Convert mouse visibility parameter into bool 2024-07-16 20:04:08 +02:00
virtio-vga-gl.c modules: introduces module_kconfig directive 2022-06-06 09:26:53 +02:00
virtio-vga-rutabaga.c gfxstream + rutabaga: add initial support for gfxstream 2023-10-16 11:29:56 +04:00
virtio-vga.c hw, target: Add ResetType argument to hold and exit phase methods 2024-04-25 10:21:06 +01:00
virtio-vga.h hw/display/virtio-vga: Convert TYPE_VIRTIO_VGA_BASE to 3-phase reset 2022-12-16 15:59:07 +00:00
vmware_vga.c ui/console: Remove dpy_cursor_define_supported() 2024-07-16 20:04:08 +02:00
xenfb.c ui+display: rename is_buffer_shared() -> surface_is_allocated() 2024-06-19 12:42:03 +02:00
xlnx_dp.c hw/display: Constify VMState 2023-12-29 11:17:30 +11:00