[PATCH] intel_iommu: Fix for IQA reg read dropped DW field

From: yeeli If VT-D hardware supports scalable mode, Linux will set the IQA DW field (bit11). In qemu, the vtd_mem_write and vtd_update_iq_dw set DW field well. However, vtd_mem_read the DW field wrong because "& VTD_IQA_QS" dropped the value of DW. Replace "&VTD_IQA_

[PATCH] intel-iommu: fix Read DMAR IQA REG DW

From: yeeli When dmar_readq or devmem2 read the DW of IQA always 0UL because "& VTD_IQA_QS". So, try to fix it. case: after vtd_mem_write IQA val: 0x100206801 after vtd_mem_read IQA val: 0x100206001 Signed-off-by: yeeli --- hw/i386/intel_iommu.c | 3 ++- 1 file changed, 2 in