Re: [PATCH v4 29/29] drm/i915/gvt: Drop final dependencies on KVM internal details

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On 7/29/2023 4:35 AM, Sean Christopherson wrote:
Open code gpa_to_gfn() in kvmgt_page_track_write() and drop KVMGT's
dependency on kvm_host.h, i.e. include only kvm_page_track.h.  KVMGT
assumes "gfn == gpa >> PAGE_SHIFT" all over the place, including a few
lines below in the same function with the same gpa, i.e. there's no
reason to use KVM's helper for this one case.

No functional change intended.

Reviewed-by: Yan Zhao <yan.y.zhao@xxxxxxxxx>
Tested-by: Yongwei Ma <yongwei.ma@xxxxxxxxx>
Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
---
  drivers/gpu/drm/i915/gvt/gvt.h   | 3 ++-
  drivers/gpu/drm/i915/gvt/kvmgt.c | 2 +-
  2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h
index 2d65800d8e93..53a0a42a50db 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.h
+++ b/drivers/gpu/drm/i915/gvt/gvt.h
@@ -34,10 +34,11 @@
  #define _GVT_H_
#include <uapi/linux/pci_regs.h>
-#include <linux/kvm_host.h>
  #include <linux/vfio.h>
  #include <linux/mdev.h>
+#include <asm/kvm_page_track.h>
+
  #include "i915_drv.h"
  #include "intel_gvt.h"
diff --git a/drivers/gpu/drm/i915/gvt/kvmgt.c b/drivers/gpu/drm/i915/gvt/kvmgt.c
index eb50997dd369..aaed3969f204 100644
--- a/drivers/gpu/drm/i915/gvt/kvmgt.c
+++ b/drivers/gpu/drm/i915/gvt/kvmgt.c
@@ -1585,7 +1585,7 @@ static void kvmgt_page_track_write(gpa_t gpa, const u8 *val, int len,
mutex_lock(&info->vgpu_lock); - if (kvmgt_gfn_is_write_protected(info, gpa_to_gfn(gpa)))
+	if (kvmgt_gfn_is_write_protected(info, gpa >> PAGE_SHIFT))
  		intel_vgpu_page_track_handler(info, gpa,
  						     (void *)val, len);
Reviewed-by: Zhi Wang <zhi.a.wang@xxxxxxxxx>



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