diff options
| author |   Changbin Du <changbin.du@intel.com> | 2018-05-08 17:07:05 +0800 |
|---|---|---|
| committer |   Joonas Lahtinen <joonas.lahtinen@linux.intel.com> | 2018-06-05 16:57:01 +0300 |
| commit | 52b2416ceb72e8f757eb56de5a98ade04d9b062d (patch) | |
| tree | 7cb2033bcadfeb82d0cdc1bb1b7b05d26946b03e | |
| parent | drm/i915/icl: Don't update enabled dbuf slices struct until updated in hw (diff) | |
| download | linux-dev-52b2416ceb72e8f757eb56de5a98ade04d9b062d.tar.xz linux-dev-52b2416ceb72e8f757eb56de5a98ade04d9b062d.zip | |
drm/i915: Add new vGPU cap info bit VGT_CAPS_HUGE_GTT
This adds a new vGPU cap info bit VGT_CAPS_HUGE_GTT, which is to detect
whether the host supports shadowing of huge gtt pages. If host does
support it, remove the page sizes restriction for vGPU.
Signed-off-by: Changbin Du <changbin.du@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1525770425-5373-1-git-send-email-changbin.du@intel.com
| -rw-r--r-- | drivers/gpu/drm/i915/i915_gem.c | 8 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_pvinfo.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/i915_vgpu.h | 6 |
3 files changed, 9 insertions, 6 deletions
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c index cb680ddafa0c..2a51a2b6d22c 100644 --- a/drivers/gpu/drm/i915/i915_gem.c +++ b/drivers/gpu/drm/i915/i915_gem.c @@ -5409,12 +5409,8 @@ int i915_gem_init(struct drm_i915_private *dev_priv) { int ret; - /* - * We need to fallback to 4K pages since gvt gtt handling doesn't - * support huge page entries - we will need to check either hypervisor - * mm can support huge guest page or just do emulation in gvt. - */ - if (intel_vgpu_active(dev_priv)) + /* We need to fallback to 4K pages if host doesn't support huge gtt. */ + if (intel_vgpu_active(dev_priv) && !intel_vgpu_has_huge_gtt(dev_priv)) mkwrite_device_info(dev_priv)->page_sizes = I915_GTT_PAGE_SIZE_4K; diff --git a/drivers/gpu/drm/i915/i915_pvinfo.h b/drivers/gpu/drm/i915/i915_pvinfo.h index 195203f298df..55bde4a02289 100644 --- a/drivers/gpu/drm/i915/i915_pvinfo.h +++ b/drivers/gpu/drm/i915/i915_pvinfo.h @@ -54,6 +54,7 @@ enum vgt_g2v_type { */ #define VGT_CAPS_FULL_48BIT_PPGTT BIT(2) #define VGT_CAPS_HWSP_EMULATION BIT(3) +#define VGT_CAPS_HUGE_GTT BIT(4) struct vgt_if { u64 magic; /* VGT_MAGIC */ diff --git a/drivers/gpu/drm/i915/i915_vgpu.h b/drivers/gpu/drm/i915/i915_vgpu.h index bb8338450dc1..551acc390046 100644 --- a/drivers/gpu/drm/i915/i915_vgpu.h +++ b/drivers/gpu/drm/i915/i915_vgpu.h @@ -36,6 +36,12 @@ intel_vgpu_has_hwsp_emulation(struct drm_i915_private *dev_priv) return dev_priv->vgpu.caps & VGT_CAPS_HWSP_EMULATION; } +static inline bool +intel_vgpu_has_huge_gtt(struct drm_i915_private *dev_priv) +{ + return dev_priv->vgpu.caps & VGT_CAPS_HUGE_GTT; +} + int intel_vgt_balloon(struct drm_i915_private *dev_priv); void intel_vgt_deballoon(struct drm_i915_private *dev_priv); |