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linux/drivers/gpu/drm
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Weinan Li a1ac5f0943 drm/i915/gvt: request srcu_read_lock before checking if one gfn is valid 
Fix the suspicious RCU usage issue in intel_vgpu_emulate_mmio_write.
Here need to request the srcu read lock of kvm->srcu before doing
gfn_to_memslot(). The detailed log is as below:
[  218.710688] =============================
[  218.710690] WARNING: suspicious RCU usage
[  218.710693] 4.14.15-dd+ #314 Tainted: G     U
[  218.710695] -----------------------------
[  218.710697] ./include/linux/kvm_host.h:575 suspicious rcu_dereference_check() usage!
[  218.710699]
               other info that might help us debug this:

[  218.710702]
               rcu_scheduler_active = 2, debug_locks = 1
[  218.710704] 1 lock held by qemu-system-x86/2144:
[  218.710706]  #0:  (&gvt->lock){+.+.}, at: [<ffffffff816a1eea>] intel_vgpu_emulate_mmio_write+0x5a/0x2d0
[  218.710721]
               stack backtrace:
[  218.710724] CPU: 0 PID: 2144 Comm: qemu-system-x86 Tainted: G     U 4.14.15-dd+ #314
[  218.710727] Hardware name: Dell Inc. OptiPlex 7040/0Y7WYT, BIOS 1.1.1 10/07/2015
[  218.710729] Call Trace:
[  218.710734]  dump_stack+0x7c/0xb3
[  218.710739]  gfn_to_memslot+0x15f/0x170
[  218.710743]  kvm_is_visible_gfn+0xa/0x30
[  218.710746]  intel_vgpu_emulate_gtt_mmio_write+0x267/0x3c0
[  218.710751]  ? __mutex_unlock_slowpath+0x3b/0x260
[  218.710754]  intel_vgpu_emulate_mmio_write+0x182/0x2d0
[  218.710759]  intel_vgpu_rw+0xba/0x170 [kvmgt]
[  218.710763]  intel_vgpu_write+0x14d/0x1a0 [kvmgt]
[  218.710767]  __vfs_write+0x23/0x130
[  218.710770]  vfs_write+0xb0/0x1b0
[  218.710774]  SyS_pwrite64+0x73/0x90
[  218.710777]  entry_SYSCALL_64_fastpath+0x25/0x9c
[  218.710780] RIP: 0033:0x7f33e8a91da3
[  218.710783] RSP: 002b:00007f33dddc8700 EFLAGS: 00000293

v2: add 'Fixes' tag, refine log format.(Zhenyu)
Fixes: cc753fbe1ac4 ("drm/i915/gvt: validate gfn before set shadow page")
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Weinan Li <weinan.z.li@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
2018-09-18 10:37:55 +08:00
..
amd
amdgpu and panel/misc fixes.
2018-08-24 09:22:54 -07:00
arc
drm: drop _mode_ from drm_mode_connector_attach_encoder
2018-07-13 18:40:27 +02:00
arm
drm/arm/hdlcd: Reject atomic commits that disable only the plane
2018-07-31 16:31:50 +01:00
armada
drm/armada: remove obsolete fb unreferencing kfifo and workqueue
2018-07-30 11:53:06 +01:00
ast
drm: drop _mode_ from drm_mode_connector_attach_encoder
2018-07-13 18:40:27 +02:00
atmel-hlcdc
Merge v4.18-rc3 into drm-next
2018-07-04 10:27:12 +10:00
bochs
drm: drop _mode_ from drm_mode_connector_attach_encoder
2018-07-13 18:40:27 +02:00
bridge
drm pull for 4.19-rc1
2018-08-15 17:39:07 -07:00
cirrus
drm: drop _mode_ from drm_mode_connector_attach_encoder
2018-07-13 18:40:27 +02:00
etnaviv
Merge branch 'etnaviv/next' of https://git.pengutronix.de/git/lst/linux into drm-next
2018-08-08 06:07:30 +10:00
exynos
drm/exynos/mixer: Remove unused local variable priv
2018-07-24 16:28:53 +09:00
fsl-dcu
drm: drop _mode_ from drm_mode_connector_attach_encoder
2018-07-13 18:40:27 +02:00
gma500
drivers/gpu/drm/gma500/: change return type to vm_fault_t
2018-08-23 18:48:43 -07:00
hisilicon
drm: drop _mode_ from drm_mode_connector_attach_encoder
2018-07-13 18:40:27 +02:00
i2c
VLA leftovers pull summary:
2018-08-17 10:40:09 -07:00
i810
drm/i810: off by one in i810_dma_vertex()
2018-07-03 15:00:42 +02:00
i915
drm/i915/gvt: request srcu_read_lock before checking if one gfn is valid
2018-09-18 10:37:55 +08:00
imx
drm/imx: use suspend/resume helpers, add ipu-v3 V4L2 XRGB32/XBGR32 support
2018-08-10 11:13:36 +10:00
lib
…
mediatek
Char/Misc driver patches for 4.19-rc1
2018-08-18 11:04:51 -07:00
meson
drm/meson: Make DMT timings parameters and pixel clock generic
2018-07-16 11:14:59 +02:00
mga
…
mgag200
drm: drop _mode_ from drm_mode_connector_attach_encoder
2018-07-13 18:40:27 +02:00
msm
drm/msm: a6xx: fix spelling mistake: "initalization" -> "initialization"
2018-08-10 18:49:18 -04:00
mxsfb
…
nouveau
BackMerge v4.18-rc7 into drm-next
2018-07-30 10:39:22 +10:00
omapdrm
drm: drop _mode_ from drm_mode_connector_attach_encoder
2018-07-13 18:40:27 +02:00
panel
drm/panel: simple: tv123wam: Add unprepare delay
2018-08-14 13:42:37 -04:00
pl111
drm/pl111: Use 64-bit arithmetic instead of 32-bit
2018-07-17 11:25:18 -07:00
qxl
drm: drop _mode_ from drm_mode_connector_attach_encoder
2018-07-13 18:40:27 +02:00
r128
…
radeon
mm, oom: distinguish blockable mode for mmu notifiers
2018-08-22 10:52:44 -07:00
rcar-du
drm: drop _mode_ from drm_mode_connector_attach_encoder
2018-07-13 18:40:27 +02:00
rockchip
drm/rockchip: Substitute is_yuv_support() with format->is_yuv
2018-07-18 16:59:27 +01:00
savage
drm/savage: off by one in savage_bci_cmdbuf()
2018-07-04 14:27:01 +02:00
scheduler
drm/scheduler: fix param documentation
2018-08-09 11:57:39 -05:00
selftests
drm-misc-next for 4.19:
2018-06-22 12:58:08 +10:00
shmobile
drm: drop _mode_ from drm_mode_connector_attach_encoder
2018-07-13 18:40:27 +02:00
sis
…
sti
drm: drop _mode_ from drm_mode_connector_attach_encoder
2018-07-13 18:40:27 +02:00
stm
drm/stm: Replace drm_dev_unref with drm_dev_put
2018-07-13 10:11:02 +02:00
sun4i
Char/Misc driver patches for 4.19-rc1
2018-08-18 11:04:51 -07:00
tdfx
…
tegra
drm pull for 4.19-rc1
2018-08-15 17:39:07 -07:00
tilcdc
drm-misc-next for 4.19:
2018-07-20 10:46:49 +10:00
tinydrm
drm/tinydrm: add backlight dependency for ili9341
2018-07-12 12:10:07 -05:00
ttm
drm/ttm: clean up non-x86 definitions on ttm_tt
2018-08-01 17:23:56 -05:00
tve200
…
udl
Merge branch 'drm-udl-next' of git://people.freedesktop.org/~airlied/linux into drm-next
2018-07-31 08:24:33 +10:00
v3d
drm/scheduler: modify API to avoid redundancy
2018-07-25 15:06:19 -05:00
vc4
drm pull for 4.19-rc1
2018-08-15 17:39:07 -07:00
vgem
drm/vgem: off by one in vgem_gem_fault()
2018-07-03 15:06:15 +02:00
via
treewide: Use array_size() in vzalloc()
2018-06-12 16:19:22 -07:00
virtio
drm: drop _mode_ from drm_mode_connector_attach_encoder
2018-07-13 18:40:27 +02:00
vkms
drm/vkms: Fix connector leak at the module removal
2018-07-28 16:09:39 -03:00
vmwgfx
Merge branch 'ida-4.19' of git://git.infradead.org/users/willy/linux-dax
2018-08-26 11:48:42 -07:00
xen
drm-misc-next for 4.19:
2018-06-22 12:58:08 +10:00
zte
drm: drop _mode_ from drm_mode_connector_attach_encoder
2018-07-13 18:40:27 +02:00
ati_pcigart.c
…
drm_agpsupport.c
…
drm_atomic_helper.c
drm pull for 4.19-rc1
2018-08-15 17:39:07 -07:00
drm_atomic.c
drm/atomic: Avoid connector to writeback_connector casts
2018-07-07 07:51:19 +02:00
drm_auth.c
…
drm_blend.c
…
drm_bridge.c
…
drm_bufs.c
…
drm_cache.c
…
drm_client.c
drm/client: Fix double free in error path
2018-07-13 12:07:46 +02:00
drm_color_mgmt.c
…
drm_connector.c
drm/connector: Fix typo in drm_connector_list_iter_next()
2018-07-16 13:18:09 -04:00
drm_context.c
drm: re-enable error handling
2018-07-16 10:01:19 -04:00
drm_crtc_helper_internal.h
…
drm_crtc_helper.c
…
drm_crtc_internal.h
drm: drop _mode_ from remaining connector functions
2018-07-13 18:40:27 +02:00
drm_crtc.c
drm: Skip __drm_mode_set_config_internal() on atomic drivers
2018-07-13 17:58:19 +03:00
drm_debugfs_crc.c
drm/crc: Only report a single overflow when a CRC fd is opened
2018-07-06 14:57:03 +02:00
drm_debugfs.c
drm: drop _mode_ from update_edit_property()
2018-07-13 18:40:27 +02:00
drm_dma.c
…
drm_dp_aux_dev.c
…
drm_dp_cec.c
drm_dp_cec.c: fix formatting typo: %pdH -> %phD
2018-07-28 15:50:40 -03:00
drm_dp_dual_mode_helper.c
…
drm_dp_helper.c
drm/dp_helper: Add DP aux channel tracing
2018-07-16 11:47:53 -04:00
drm_dp_mst_topology.c
drm: drop _mode_ from remaining connector functions
2018-07-13 18:40:27 +02:00
drm_drv.c
drm/dp_helper: Add DP aux channel tracing
2018-07-16 11:47:53 -04:00
drm_dumb_buffers.c
drm-misc-next for 4.19:
2018-06-28 13:29:07 +10:00
drm_edid_load.c
…
drm_edid.c
drm/edid: Add 6 bpc quirk for SDC panel in Lenovo B50-80
2018-08-23 10:25:39 +02:00
drm_encoder_slave.c
…
drm_encoder.c
…
drm_fb_cma_helper.c
drm/cma-helper: Remove drm_fb_cma_fbdev_init_with_funcs()
2018-07-10 14:54:50 +02:00
drm_fb_helper.c
drm/fb-helper: Finish the generic fbdev emulation
2018-07-10 14:54:09 +02:00
drm_file.c
drm: Begin an API for in-kernel clients
2018-07-10 14:51:37 +02:00
drm_flip_work.c
…
drm_fourcc.c
drm/fourcc: Add is_yuv field to drm_format_info to denote if the format is yuv
2018-07-18 16:56:45 +01:00
drm_framebuffer.c
drm: Add drm_plane_mask()
2018-07-02 18:45:55 +03:00
drm_gem_cma_helper.c
…
drm_gem_framebuffer_helper.c
drm/gem-fb-helper: Always do implicit sync
2018-06-20 14:43:13 +02:00
drm_gem.c
drm/i915: Prevent writing into a read-only object via a GGTT mmap
2018-07-13 16:14:04 +01:00
drm_global.c
drm: add SPDX identifier and clarify license
2018-06-29 15:28:47 -05:00
drm_hashtab.c
treewide: Use array_size() in vzalloc()
2018-06-12 16:19:22 -07:00
drm_info.c
…
drm_internal.h
drm: provide management functions for drm_file
2018-06-25 16:17:03 +02:00
drm_ioc32.c
…
drm_ioctl.c
drm: drop _mode_ from remaining connector functions
2018-07-13 18:40:27 +02:00
drm_irq.c
…
drm_kms_helper_common.c
…
drm_lease.c
turn filp_clone_open() into inline wrapper for dentry_open()
2018-07-10 23:29:03 -04:00
drm_legacy.h
…
drm_lock.c
…
drm_memory.c
treewide: Use array_size() in vmalloc()
2018-06-12 16:19:22 -07:00
drm_mipi_dsi.c
drm: Add support for pps and compression mode command packet
2018-07-25 07:51:05 -04:00
drm_mm.c
drm/mm: Add a search-by-address variant to only inspect a single hole
2018-05-24 15:04:30 +01:00
drm_mode_config.c
drm: writeback: Add client capability for exposing writeback connectors
2018-06-20 15:30:20 +01:00
drm_mode_object.c
drm: drop _mode_ from remaining connector functions
2018-07-13 18:40:27 +02:00
drm_modes.c
drm: drop _mode_ from remaining connector functions
2018-07-13 18:40:27 +02:00
drm_modeset_helper.c
…
drm_modeset_lock.c
drm: Change deadlock-avoidance algorithm for the modeset locks.
2018-07-03 09:46:05 +02:00
drm_of.c
drm/doc: Include drm_of.c helpers
2018-07-13 18:40:28 +02:00
drm_panel_orientation_quirks.c
drm: panel-orientation-quirks: Convert to use match_string() helper
2018-05-10 11:36:25 -04:00
drm_panel.c
drm/panel: Let of_drm_find_panel() return -ENODEV when the panel is disabled
2018-07-10 17:59:05 +02:00
drm_pci.c
drm: drop drm_pcie_get_speed_cap_mask and drm_pcie_get_max_link_width
2018-07-05 16:40:00 -05:00
drm_plane_helper.c
drm: add missing ctx argument to plane transitional helpers
2018-07-03 09:30:19 +02:00
drm_plane.c
drm: Introduce __setplane_atomic()
2018-07-13 17:58:19 +03:00
drm_prime.c
dma-buf: remove kmap_atomic interface
2018-06-20 15:59:34 +02:00
drm_print.c
drm: Add puts callback for the coredump printer
2018-07-30 08:49:41 -04:00
drm_probe_helper.c
drm: drop _mode_ from remaining connector functions
2018-07-13 18:40:27 +02:00
drm_property.c
drm: Use kvzalloc for allocating blob property memory
2018-07-02 11:05:21 -05:00
drm_rect.c
drm/rect: Handle rounding errors in drm_rect_clip_scaled, v3.
2018-05-04 11:09:54 +02:00
drm_scatter.c
…
drm_scdc_helper.c
…
drm_simple_kms_helper.c
drm: drop _mode_ from drm_mode_connector_attach_encoder
2018-07-13 18:40:27 +02:00
drm_syncobj.c
drm: Remove unecessary dma_fence_ops
2018-07-03 13:13:22 +02:00
drm_sysfs.c
…
drm_trace_points.c
…
drm_trace.h
…
drm_vblank.c
…
drm_vm.c
gpu: drm: drm_vm: Adding new typedef vm_fault_t
2018-05-29 08:58:46 +02:00
drm_vma_manager.c
drm: add SPDX idenitifier and clarify license
2018-06-29 15:28:47 -05:00
drm_writeback.c
drm: writeback: Fix doc that says connector should be disconnected
2018-07-16 16:35:27 +01:00
Kconfig
drm: add support for DisplayPort CEC-Tunneling-over-AUX
2018-07-13 17:58:19 +03:00
Makefile
drm: add support for DisplayPort CEC-Tunneling-over-AUX
2018-07-13 17:58:19 +03:00