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HV: simplified the logic of iommu_read/write64

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hv: vtd: simplified the logic of iommu_read/write64

Tracked-On: #4535
Signed-off-by: Qian Wang <qian1.wang@intel.com>
Reviewed-by: Binbin Wu <binbin.wu@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Qian Wang 2020-03-27 10:47:05 +08:00 committed by wenlingz
parent a1e081073f
commit c2bcf9fade
1 changed files with 2 additions and 14 deletions
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16
hypervisor/arch/x86/vtd.c
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@ -237,13 +237,7 @@ static uint32_t iommu_read32(const struct dmar_drhd_rt *dmar_unit, uint32_t offs
static uint64_t iommu_read64(const struct dmar_drhd_rt *dmar_unit, uint32_t offset)
{
uint64_t value;
value = mmio_read32(hpa2hva(dmar_unit->drhd->reg_base_addr + offset + 4U));
value = value << 32U;
value = value | mmio_read32(hpa2hva(dmar_unit->drhd->reg_base_addr + offset));
return value;
return mmio_read64(hpa2hva(dmar_unit->drhd->reg_base_addr + offset));
}
static void iommu_write32(const struct dmar_drhd_rt *dmar_unit, uint32_t offset, uint32_t value)
@ -253,13 +247,7 @@ static void iommu_write32(const struct dmar_drhd_rt *dmar_unit, uint32_t offset,
static void iommu_write64(const struct dmar_drhd_rt *dmar_unit, uint32_t offset, uint64_t value)
{
uint32_t temp;
temp = (uint32_t)value;
mmio_write32(temp, hpa2hva(dmar_unit->drhd->reg_base_addr + offset));
temp = (uint32_t)(value >> 32U);
mmio_write32(temp, hpa2hva(dmar_unit->drhd->reg_base_addr + offset + 4U));
mmio_write64(value, hpa2hva(dmar_unit->drhd->reg_base_addr + offset));
}
static inline void dmar_wait_completion(const struct dmar_drhd_rt *dmar_unit, uint32_t offset,