71 lines
2.3 KiB
Diff
71 lines
2.3 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
|
|
From: Zhao Yakui <yakui.zhao@intel.com>
|
|
Date: Fri, 17 May 2019 09:22:13 +0800
|
|
Subject: [PATCH] Reduce the unnecessary interrupt injection for small time
|
|
interval
|
|
|
|
When the time interval is less than 10000ns(10us), it is unnecessary to
|
|
inject the interrupt.
|
|
|
|
Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
|
|
Signed-off-by: Liu Shuo <shuo.liu@intel.com>
|
|
---
|
|
drivers/gpu/drm/i915/gvt/gvt.h | 1 +
|
|
drivers/gpu/drm/i915/gvt/mpt.h | 14 ++++++++++++++
|
|
drivers/gpu/drm/i915/gvt/vgpu.c | 1 +
|
|
3 files changed, 16 insertions(+)
|
|
|
|
diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h
|
|
index cf689150dbf7..b0073edbe4a4 100644
|
|
--- a/drivers/gpu/drm/i915/gvt/gvt.h
|
|
+++ b/drivers/gpu/drm/i915/gvt/gvt.h
|
|
@@ -240,6 +240,7 @@ struct intel_vgpu {
|
|
unsigned long long *cached_guest_entry;
|
|
bool ge_cache_enable;
|
|
bool entire_nonctxmmio_checked;
|
|
+ ktime_t vgpu_msi_time;
|
|
};
|
|
|
|
/* validating GM healthy status*/
|
|
diff --git a/drivers/gpu/drm/i915/gvt/mpt.h b/drivers/gpu/drm/i915/gvt/mpt.h
|
|
index 14fa2ea047fa..6030e41cc6bb 100644
|
|
--- a/drivers/gpu/drm/i915/gvt/mpt.h
|
|
+++ b/drivers/gpu/drm/i915/gvt/mpt.h
|
|
@@ -129,7 +129,21 @@ static inline int intel_gvt_hypervisor_inject_msi(struct intel_vgpu *vgpu)
|
|
u16 control, data;
|
|
u32 addr;
|
|
int ret;
|
|
+ ktime_t time_current;
|
|
|
|
+ time_current = ktime_get_raw();
|
|
+
|
|
+ if (ktime_before(time_current,
|
|
+ ktime_add_ns(vgpu->vgpu_msi_time, 10000))) {
|
|
+ /*
|
|
+ * vgpu->vpgu_msi_time records the time of last interrupt
|
|
+ * injection. when the time interval is too small,
|
|
+ * the interrupt injection will be skipped.
|
|
+ */
|
|
+ return 0;
|
|
+ }
|
|
+
|
|
+ vgpu->vgpu_msi_time = time_current;
|
|
control = *(u16 *)(vgpu_cfg_space(vgpu) + MSI_CAP_CONTROL(offset));
|
|
addr = *(u32 *)(vgpu_cfg_space(vgpu) + MSI_CAP_ADDRESS(offset));
|
|
data = *(u16 *)(vgpu_cfg_space(vgpu) + MSI_CAP_DATA(offset));
|
|
diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c
|
|
index 08e99dd14344..b28bc3af3eaf 100644
|
|
--- a/drivers/gpu/drm/i915/gvt/vgpu.c
|
|
+++ b/drivers/gpu/drm/i915/gvt/vgpu.c
|
|
@@ -511,6 +511,7 @@ struct intel_vgpu *intel_gvt_create_vgpu(struct intel_gvt *gvt,
|
|
/* calculate left instance change for types */
|
|
intel_gvt_update_vgpu_types(gvt);
|
|
mutex_unlock(&gvt->lock);
|
|
+ vgpu->vgpu_msi_time = ktime_get_raw();
|
|
|
|
return vgpu;
|
|
}
|
|
--
|
|
https://clearlinux.org
|
|
|