[PATCH v2] drm/i915/gvt: ensure gpu is powered before do i915_gem_gtt_insert

[Zhenyu Wang]

On 2018.10.30 13:12:23 +0800, intel-gvt-dev-bounces at lists.freedesktop.org wrote:
> From: Hang Yuan <hang.yuan at linux.intel.com>
> 
> i915_gem_gtt_insert may evict some vmas and access HW if ggtt
> vm space is not enough. So add mmio_hw_access_pre before invoke
> i915_gem_gtt_insert to avoid call trace like below in vgpu create/
> destroy test.
> 
> WARNING: CPU: 6 PID: 8720 at drivers/gpu/drm/i915/intel_drv.h:1768
> assert_rpm_wakelock_held.part.2+0x27/0x30 [i915]
> RPM wakelock ref not held during HW access
> 
> Call Trace:
>   [<ffffffff99af3b22>] dump_stack+0x19/0x1b
>   [<ffffffff9948e338>] __warn+0xd8/0x100
>   [<ffffffff9948e3bf>] warn_slowpath_fmt+0x5f/0x80
>   [<ffffffffc0d5cc32>] assert_rpm_wakelock_held.part.2+0x27/0x30 [i915]
>   [<ffffffffc0c7ffcf>] intel_runtime_pm_get_noresume+0x6f/0x80 [i915]
>   [<ffffffffc0ca614d>] i915_gem_request_alloc+0x2dd/0x3c0 [i915]
>   [<ffffffffc0c9056e>] i915_gem_switch_to_kernel_context+0xae/0x1d0 [i915]
>   [<ffffffffc0c91572>] ggtt_flush+0x12/0x30 [i915]
>   [<ffffffffc0c917ef>] i915_gem_evict_something+0x25f/0x470 [i915]
>   [<ffffffffc0c9b62c>] i915_gem_gtt_insert+0x15c/0x1c0 [i915]
>   [<ffffffffc0d35837>] alloc_gm+0xa7/0x160 [i915]
>   [<ffffffffc0d35d8d>] intel_vgpu_alloc_resource+0x1ad/0x410 [i915]
>   [<ffffffffc0d4819c>] intel_gvt_create_vgpu+0x16c/0x260 [i915]
>   [<ffffffffc055d980>] intel_vgpu_create+0x50/0x140 [kvmgt]
>   [<ffffffffc04fc6fa>] mdev_device_create+0x1aa/0x2e0 [mdev]
> 
> v2: use mmio_hw_access_pre/post <Zhenyu>
> 
> Signed-off-by: Hang Yuan <hang.yuan at linux.intel.com>
> ---

Applied this! Sorry for the delay.

-- 
Open Source Technology Center, Intel ltd.

$gpg --keyserver wwwkeys.pgp.net --recv-keys 4D781827
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 195 bytes
Desc: not available
URL: <https://lists.freedesktop.org/archives/intel-gvt-dev/attachments/20181112/b1f97227/attachment.sig>