GVTg implemented guest shared_page register operation and read and write shared_page functionality based on hypervisor read and write functionality.
the shared_page_gpa was passed from guest driver through PVINFO shared_page_gpa register. Signed-off-by: Xiaolin Zhang <xiaolin.zh...@intel.com> --- drivers/gpu/drm/i915/gvt/gvt.h | 11 +++++++-- drivers/gpu/drm/i915/gvt/handlers.c | 20 +++++++++++++++++ drivers/gpu/drm/i915/gvt/vgpu.c | 45 +++++++++++++++++++++++++++++++++++++ 3 files changed, 74 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h index 3810b17..ca2f656 100644 --- a/drivers/gpu/drm/i915/gvt/gvt.h +++ b/drivers/gpu/drm/i915/gvt/gvt.h @@ -214,6 +214,8 @@ struct intel_vgpu { u32 scan_nonprivbb; u32 pv_caps; + u64 shared_page_gpa; + bool shared_page_enabled; }; static inline void *intel_vgpu_vdev(struct intel_vgpu *vgpu) @@ -536,7 +538,7 @@ static inline u64 intel_vgpu_get_bar_gpa(struct intel_vgpu *vgpu, int bar) static inline bool intel_vgpu_enabled_pv_cap(struct intel_vgpu *vgpu, enum intel_vgpu_pv_caps cap) { - return (vgpu->pv_caps & cap); + return vgpu->shared_page_enabled && (vgpu->pv_caps & cap); } void intel_vgpu_clean_opregion(struct intel_vgpu *vgpu); @@ -692,7 +694,12 @@ void intel_gvt_debugfs_add_vgpu(struct intel_vgpu *vgpu); void intel_gvt_debugfs_remove_vgpu(struct intel_vgpu *vgpu); void intel_gvt_debugfs_init(struct intel_gvt *gvt); void intel_gvt_debugfs_clean(struct intel_gvt *gvt); - +int intel_gvt_read_shared_page(struct intel_vgpu *vgpu, + unsigned int offset, void *buf, + unsigned long len); +int intel_gvt_write_shared_page(struct intel_vgpu *vgpu, + unsigned int offset, void *buf, + unsigned long len); #include "trace.h" #include "mpt.h" diff --git a/drivers/gpu/drm/i915/gvt/handlers.c b/drivers/gpu/drm/i915/gvt/handlers.c index 87d562e..67cdae4 100644 --- a/drivers/gpu/drm/i915/gvt/handlers.c +++ b/drivers/gpu/drm/i915/gvt/handlers.c @@ -1204,6 +1204,8 @@ static int pvinfo_mmio_read(struct intel_vgpu *vgpu, unsigned int offset, case 0x78010: /* vgt_caps */ case 0x7881c: case _vgtif_reg(pv_caps): + case _vgtif_reg(shared_page_gpa): + case _vgtif_reg(shared_page_gpa) + 4: break; default: invalid_read = true; @@ -1221,6 +1223,9 @@ static int handle_g2v_notification(struct intel_vgpu *vgpu, int notification) enum intel_gvt_gtt_type root_entry_type = GTT_TYPE_PPGTT_ROOT_L4_ENTRY; struct intel_vgpu_mm *mm; u64 *pdps; + unsigned long gpa, gfn; + u16 ver_major = PV_MAJOR; + u16 ver_minor = PV_MINOR; pdps = (u64 *)&vgpu_vreg64_t(vgpu, vgtif_reg(pdp[0])); @@ -1234,6 +1239,19 @@ static int handle_g2v_notification(struct intel_vgpu *vgpu, int notification) case VGT_G2V_PPGTT_L3_PAGE_TABLE_DESTROY: case VGT_G2V_PPGTT_L4_PAGE_TABLE_DESTROY: return intel_vgpu_put_ppgtt_mm(vgpu, pdps); + case VGT_G2V_SHARED_PAGE_REGISTER: + gpa = vgpu_vreg64_t(vgpu, vgtif_reg(shared_page_gpa)); + gfn = gpa >> PAGE_SHIFT; + if (!intel_gvt_hypervisor_is_valid_gfn(vgpu, gfn)) { + vgpu_vreg_t(vgpu, vgtif_reg(pv_caps)) = 0; + return 0; + } + vgpu->shared_page_gpa = gpa; + vgpu->shared_page_enabled = true; + + intel_gvt_write_shared_page(vgpu, 0, &ver_major, 2); + intel_gvt_write_shared_page(vgpu, 2, &ver_minor, 2); + break; case VGT_G2V_EXECLIST_CONTEXT_CREATE: case VGT_G2V_EXECLIST_CONTEXT_DESTROY: case 1: /* Remove this in guest driver. */ @@ -1290,6 +1308,8 @@ static int pvinfo_mmio_write(struct intel_vgpu *vgpu, unsigned int offset, case _vgtif_reg(pdp[3].hi): case _vgtif_reg(execlist_context_descriptor_lo): case _vgtif_reg(execlist_context_descriptor_hi): + case _vgtif_reg(shared_page_gpa): + case _vgtif_reg(shared_page_gpa) + 4: break; case _vgtif_reg(rsv5[0])..._vgtif_reg(rsv5[3]): invalid_write = true; diff --git a/drivers/gpu/drm/i915/gvt/vgpu.c b/drivers/gpu/drm/i915/gvt/vgpu.c index 41d51ec..09bd00a 100644 --- a/drivers/gpu/drm/i915/gvt/vgpu.c +++ b/drivers/gpu/drm/i915/gvt/vgpu.c @@ -64,6 +64,8 @@ void populate_pvinfo_page(struct intel_vgpu *vgpu) vgpu_vreg_t(vgpu, vgtif_reg(cursor_x_hot)) = UINT_MAX; vgpu_vreg_t(vgpu, vgtif_reg(cursor_y_hot)) = UINT_MAX; + vgpu_vreg64_t(vgpu, vgtif_reg(shared_page_gpa)) = 0; + gvt_dbg_core("Populate PVINFO PAGE for vGPU %d\n", vgpu->id); gvt_dbg_core("aperture base [GMADR] 0x%llx size 0x%llx\n", vgpu_aperture_gmadr_base(vgpu), vgpu_aperture_sz(vgpu)); @@ -613,3 +615,46 @@ void intel_gvt_reset_vgpu(struct intel_vgpu *vgpu) intel_gvt_reset_vgpu_locked(vgpu, true, 0); mutex_unlock(&vgpu->vgpu_lock); } + +/** + * intel_gvt_read_shared_page - read content from shared page + */ +int intel_gvt_read_shared_page(struct intel_vgpu *vgpu, + unsigned int offset, void *buf, + unsigned long len) +{ + int ret = -EINVAL; + unsigned long gpa; + + if (offset >= PAGE_SIZE) + goto err; + + gpa = vgpu->shared_page_gpa + offset; + ret = intel_gvt_hypervisor_read_gpa(vgpu, gpa, buf, len); + if (!ret) + return ret; +err: + gvt_vgpu_err("read shared page (offset %x) failed", offset); + memset(buf, 0, len); + return ret; +} + +int intel_gvt_write_shared_page(struct intel_vgpu *vgpu, + unsigned int offset, void *buf, + unsigned long len) +{ + int ret = -EINVAL; + unsigned long gpa; + + if (offset >= PAGE_SIZE) + goto err; + + gpa = vgpu->shared_page_gpa + offset; + ret = intel_gvt_hypervisor_write_gpa(vgpu, gpa, buf, len); + if (!ret) + return ret; +err: + gvt_vgpu_err("write shared page (offset %x) failed", offset); + memset(buf, 0, len); + return ret; +} -- 2.7.4 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx