From: yeeli <[email protected]> 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 <[email protected]> --- hw/i386/intel_iommu.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index 37c21a0aec..e230a45940 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -2938,7 +2938,8 @@ static uint64_t vtd_mem_read(void *opaque, hwaddr addr, unsigned size) /* Invalidation Queue Address Register, 64-bit */ case DMAR_IQA_REG: - val = s->iq | (vtd_get_quad(s, DMAR_IQA_REG) & VTD_IQA_QS); + val = s->iq | (vtd_get_quad(s, DMAR_IQA_REG) & VTD_IQA_QS + | VTD_IQA_DW_MASK); if (size == 4) { val = val & ((1ULL << 32) - 1); } -- 2.34.1
