mmGCVM_L2_CNTL2
tmp = RREG32_SOC15(GC, 0, mmGCVM_L2_CNTL2);
WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL2, tmp);
tmp = RREG32_SOC15(GC, 0, mmGCVM_L2_CNTL2);
WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL2, tmp);
adev->gmc.VM_L2_CNTL2 = RREG32_SOC15(GC, 0, mmGCVM_L2_CNTL2);
WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL2, adev->gmc.VM_L2_CNTL2);