Current it's strictly checked if PVINFO version matches 1.0
for GVT-g i915 guest which doesn't help for compatibility at
all and forces GVT-g host can't extend PVINFO easily with version
bump for real compatibility check.
This fixes that to check minimal required PVINFO version instead.
v2:
- drop unneeded version macro
- use only major version for sanity check
Cc: Chuanxiao Dong <chuanxiao.dong@xxxxxxxxx>
Cc: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # v4.10+
Signed-off-by: Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_pvinfo.h | 4 ----
drivers/gpu/drm/i915/i915_vgpu.c | 9 ++++-----
2 files changed, 4 insertions(+), 9 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_pvinfo.h b/drivers/gpu/drm/i915/i915_pvinfo.h
index c0cb2974caac..928f600c875a 100644
--- a/drivers/gpu/drm/i915/i915_pvinfo.h
+++ b/drivers/gpu/drm/i915/i915_pvinfo.h
@@ -36,10 +36,6 @@
#define VGT_VERSION_MAJOR 1
#define VGT_VERSION_MINOR 0
-#define INTEL_VGT_IF_VERSION_ENCODE(major, minor) ((major) << 16 | (minor))
-#define INTEL_VGT_IF_VERSION \
- INTEL_VGT_IF_VERSION_ENCODE(VGT_VERSION_MAJOR, VGT_VERSION_MINOR)
-
/*
* notifications from guest to vgpu device model
*/
diff --git a/drivers/gpu/drm/i915/i915_vgpu.c b/drivers/gpu/drm/i915/i915_vgpu.c
index 3791e9c9392f..25f2a76f17e9 100644
--- a/drivers/gpu/drm/i915/i915_vgpu.c
+++ b/drivers/gpu/drm/i915/i915_vgpu.c
@@ -61,7 +61,7 @@
void i915_check_vgpu(struct drm_i915_private *dev_priv)
{
uint64_t magic;
- uint32_t version;
+ uint32_t version_major;
BUILD_BUG_ON(sizeof(struct vgt_if) != VGT_PVINFO_SIZE);
@@ -69,10 +69,9 @@ void i915_check_vgpu(struct drm_i915_private *dev_priv)
if (magic != VGT_MAGIC)
return;
- version = INTEL_VGT_IF_VERSION_ENCODE(
- __raw_i915_read16(dev_priv, vgtif_reg(version_major)),
- __raw_i915_read16(dev_priv, vgtif_reg(version_minor)));
- if (version != INTEL_VGT_IF_VERSION) {
+ version_major = __raw_i915_read16(dev_priv,
+ vgtif_reg(version_major));
+ if (version_major < VGT_VERSION_MAJOR) {
DRM_INFO("VGT interface version mismatch!\n");
return;
}
--
2.11.0
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