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For SRIOV VM env with XGMI enabled systems, XGMI physical node id may change when hibernate and resume with different VF. Update XGMI info and vram_base_offset on resume for gfx444 SRIOV env. Add amdgpu_virt_xgmi_migrate_enabled() as the feature flag. Signed-off-by: Jiang Liu <gerry@linux.alibaba.com> Signed-off-by: Samuel Zhang <guoqing.zhang@amd.com> Reviewed-by: Christian König <christian.koenig@amd.com> Reviewed-by: Lijo Lazar <lijo.lazar@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>