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331f38e77d
linux/drivers/gpu/drm
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Zhiyuan Lv 331f38e77d drm/i915: preallocate pdps for 32 bit vgpu 
This is based on Mika Kuoppala's patch below:
http://article.gmane.org/gmane.comp.freedesktop.xorg.drivers.intel/61104/match=workaround+hw+preload

The patch will preallocate the page directories for 32-bit PPGTT when
i915 runs inside a virtual machine with Intel GVT-g. With this change,
the root pointers in EXECLIST context will always keep the same.

The change is needed for vGPU because Intel GVT-g will do page table
shadowing, and needs to track all the page table changes from guest
i915 driver. However, if guest PPGTT is modified through GPU commands
like LRI, it is not possible to trap the operations in the right time,
so it will be hard to make shadow PPGTT to work correctly.

Shadow PPGTT could be much simpler with this change. Meanwhile
hypervisor could simply prohibit any attempt of PPGTT modification
through GPU command for security.

The function gen8_preallocate_top_level_pdps() in the patch is from
Mika, with only one change to set "used_pdpes" to avoid duplicated
allocation later.

Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Dave Gordon <david.s.gordon@intel.com>
Cc: Michel Thierry <michel.thierry@intel.com>
Signed-off-by: Zhiyuan Lv <zhiyuan.lv@intel.com>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2015-09-02 11:42:53 +02:00
..
amd Merge tag 'drm-intel-fixes-2015-08-14' into drm-intel-next-fixes 2015-08-14 18:11:30 +02:00
armada Merge branch 'drm-armada-fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm into drm-fixes 2015-07-17 10:06:04 +10:00
ast
atmel-hlcdc Merge tag 'drm-intel-fixes-2015-08-14' into drm-intel-next-fixes 2015-08-14 18:11:30 +02:00
bochs
bridge drm/exynos: atomic dpms support 2015-06-20 00:32:52 +09:00
cirrus
exynos drm/atomic: pass old crtc state to atomic_begin/flush. 2015-07-27 16:23:22 +02:00
gma500
i2c Merge branch 'drm-tda998x-fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2015-08-07 04:48:46 +03:00
i810
i915 drm/i915: preallocate pdps for 32 bit vgpu 2015-09-02 11:42:53 +02:00
imx drm/imx: tve: fix media bus format for VGA output 2015-07-10 11:02:47 +02:00
mga
mgag200 Merge tag 'topic/drm-misc-2015-07-23' of git://anongit.freedesktop.org/drm-intel into drm-next 2015-07-24 14:28:16 +10:00
msm Merge tag 'drm-intel-fixes-2015-08-14' into drm-intel-next-fixes 2015-08-14 18:11:30 +02:00
nouveau Merge tag 'drm-intel-fixes-2015-08-14' into drm-intel-next-fixes 2015-08-14 18:11:30 +02:00
omapdrm drm/omap: replace ALIGN(PAGE_SIZE) by PAGE_ALIGN 2015-07-02 15:58:07 +03:00
panel drm/panel: simple: Add bus format for HannStar HSD100PXN1 2015-06-12 16:40:42 +02:00
qxl drm/qxl: Propagate correctly errors from qxlhw_handle_to_bo 2015-06-05 11:00:52 +10:00
r128
radeon Merge tag 'drm-intel-fixes-2015-08-14' into drm-intel-next-fixes 2015-08-14 18:11:30 +02:00
rcar-du drm/atomic: pass old crtc state to atomic_begin/flush. 2015-07-27 16:23:22 +02:00
rockchip Merge branch 'drm-rockchip-2015-07-13' of https://github.com/markyzq/kernel-drm-rockchip into drm-fixes 2015-07-17 10:25:02 +10:00
savage
shmobile drm: Simplify drm_for_each_legacy_plane arguments 2015-07-22 16:25:45 +02:00
sis
sti drm/atomic: pass old crtc state to atomic_begin/flush. 2015-07-27 16:23:22 +02:00
tdfx
tegra drm: Make the connector dpms callback return a value, v2. 2015-07-27 16:23:28 +02:00
tilcdc
ttm drm/ttm: recognize ARM64 arch in ioprot handler 2015-07-24 11:51:14 +10:00
udl
vgem drm/vgem: Set unique to "vgem" 2015-06-24 11:20:46 +10:00
via
virtio virtio-gpu: add locking for vbuf pool 2015-06-16 11:22:41 +02:00
vmwgfx drm: Make the connector dpms callback return a value, v2. 2015-07-27 16:23:28 +02:00
ati_pcigart.c
drm_agpsupport.c
drm_atomic_helper.c Merge tag 'drm-intel-fixes-2015-08-14' into drm-intel-next-fixes 2015-08-14 18:11:30 +02:00
drm_atomic.c Merge tag 'topic/connector-locking-2015-07-23' of git://anongit.freedesktop.org/drm-intel into drm-next 2015-07-24 14:30:29 +10:00
drm_auth.c
drm_bridge.c
drm_bufs.c
drm_cache.c drm: Avoid the double clflush on the last cache line in drm_clflush_virt_range() 2015-06-19 17:25:17 +02:00
drm_context.c drm: Convert drm_legacy_ctxbitmap_init to void return type 2015-07-02 17:00:48 +02:00
drm_crtc_helper.c drm: Make the connector dpms callback return a value, v2. 2015-07-27 16:23:28 +02:00
drm_crtc_internal.h
drm_crtc.c Merge tag 'drm-intel-fixes-2015-08-14' into drm-intel-next-fixes 2015-08-14 18:11:30 +02:00
drm_debugfs.c
drm_dma.c
drm_dp_helper.c
drm_dp_mst_topology.c drm/dp-mst: Remove debug WARN_ON 2015-08-04 11:10:16 +02:00
drm_drv.c Merge tag 'topic/connector-locking-2015-07-23' of git://anongit.freedesktop.org/drm-intel into drm-next 2015-07-24 14:30:29 +10:00
drm_edid_load.c
drm_edid.c drm: Roll out drm_for_each_connector more 2015-07-22 16:25:47 +02:00
drm_encoder_slave.c
drm_fb_cma_helper.c drm: Roll out drm_for_each_{plane,crtc,encoder} 2015-07-22 17:29:37 +02:00
drm_fb_helper.c Merge tag 'topic/connector-locking-2015-07-23' of git://anongit.freedesktop.org/drm-intel into drm-next 2015-07-24 14:30:29 +10:00
drm_flip_work.c
drm_fops.c
drm_gem_cma_helper.c drm/cma-helper: Fix locking in drm_fb_cma_debugfs_show 2015-07-22 17:29:24 +02:00
drm_gem.c drm/gem: rip out drm vma accounting for gem mmaps 2015-07-14 12:18:45 +02:00
drm_global.c
drm_hashtab.c
drm_info.c
drm_internal.h
drm_ioc32.c Merge tag 'topic/drm-misc-2015-07-23' of git://anongit.freedesktop.org/drm-intel into drm-next 2015-07-24 14:28:16 +10:00
drm_ioctl.c Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2015-06-26 13:18:51 -07:00
drm_irq.c Merge tag 'drm-intel-fixes-2015-08-14' into drm-intel-next-fixes 2015-08-14 18:11:30 +02:00
drm_legacy.h drm: Convert drm_legacy_ctxbitmap_init to void return type 2015-07-02 17:00:48 +02:00
drm_lock.c drm: Reject DRI1 hw lock ioctl functions for kms drivers 2015-07-02 17:00:48 +02:00
drm_memory.c
drm_mipi_dsi.c
drm_mm.c drm: clean up drm_mm debugfs output 2015-05-29 09:17:57 +10:00
drm_modes.c
drm_modeset_lock.c drm: Roll out drm_for_each_{plane,crtc,encoder} 2015-07-22 17:29:37 +02:00
drm_of.c drm: Add modeset object iterators 2015-07-22 16:25:45 +02:00
drm_panel.c
drm_pci.c
drm_plane_helper.c drm/atomic: pass old crtc state to atomic_begin/flush. 2015-07-27 16:23:22 +02:00
drm_platform.c
drm_prime.c drm: prime: Document gem_prime_mmap 2015-06-19 17:50:05 +02:00
drm_probe_helper.c drm/probe-helper: Grab mode_config.mutex in poll_init/enable 2015-07-22 16:25:45 +02:00
drm_rect.c
drm_scatter.c
drm_sysfs.c Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux 2015-06-26 13:18:51 -07:00
drm_trace_points.c
drm_trace.h
drm_vm.c
drm_vma_manager.c
Kconfig drm/amdgpu: add core driver (v4) 2015-06-03 21:03:15 -04:00
Makefile drm/amdgpu: add core driver (v4) 2015-06-03 21:03:15 -04:00