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hv: vtd: init interrupt config when resume 

Current code doesn't init interrupt config when resume from S3.
The related register contect will be lost during S3.
This patch re-init these regiters.

Tracked-On: #1855
Signed-off-by: Binbin Wu <binbin.wu@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Binbin Wu 2018-11-08 18:55:31 +08:00 committed by lijinxia
parent 830b3aa07c
commit 42e0e169c3
1 changed files with 12 additions and 25 deletions
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37
hypervisor/arch/x86/vtd.c
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@ -751,23 +751,19 @@ static int dmar_setup_interrupt(struct dmar_drhd_rt *dmar_unit)
uint32_t vector;
int32_t retval;
if (dmar_unit->dmar_irq != IRQ_INVALID) {
dev_dbg(ACRN_DBG_IOMMU, "%s: irq already setup", __func__);
return 0;
}
if (dmar_unit->dmar_irq == IRQ_INVALID) {
retval = request_irq(IRQ_INVALID, dmar_fault_handler, dmar_unit, IRQF_NONE);
retval = request_irq(IRQ_INVALID, dmar_fault_handler, dmar_unit, IRQF_NONE);
if (retval < 0 ) {
pr_err("%s: fail to setup interrupt", __func__);
return retval;
} else {
dmar_unit->dmar_irq = (uint32_t)retval;
if (retval < 0 ) {
pr_err("%s: fail to setup interrupt", __func__);
return retval;
} else {
dmar_unit->dmar_irq = (uint32_t)retval;
}
}
vector = irq_to_vector(dmar_unit->dmar_irq);
dev_dbg(ACRN_DBG_IOMMU, "alloc irq#%d vector#%d for dmar_unit", dmar_unit->dmar_irq, vector);
dev_dbg(ACRN_DBG_IOMMU, "irq#%d vector#%d for dmar_unit", dmar_unit->dmar_irq, vector);
dmar_fault_msi_write(dmar_unit, vector);
dmar_fault_event_unmask(dmar_unit);
@ -801,32 +797,23 @@ static void dmar_suspend(struct dmar_drhd_rt *dmar_unit)
dmar_invalid_context_cache_global(dmar_unit);
dmar_invalid_iotlb_global(dmar_unit);
dmar_disable(dmar_unit);
/* save IOMMU fault register state */
for (i = 0U; i < IOMMU_FAULT_REGISTER_STATE_NUM; i++) {
dmar_unit->fault_state[i] = iommu_read32(dmar_unit, DMAR_FECTL_REG + (i * IOMMU_FAULT_REGISTER_SIZE));
}
/* disable translation */
dmar_disable_translation(dmar_unit);
}
static void dmar_resume(struct dmar_drhd_rt *dmar_unit)
{
uint32_t i;
/* set root table */
dmar_set_root_table(dmar_unit);
/* flush */
dmar_write_buffer_flush(dmar_unit);
dmar_invalid_context_cache_global(dmar_unit);
dmar_invalid_iotlb_global(dmar_unit);
/* restore IOMMU fault register state */
for (i = 0U; i < IOMMU_FAULT_REGISTER_STATE_NUM; i++) {
iommu_write32(dmar_unit, DMAR_FECTL_REG + (i * IOMMU_FAULT_REGISTER_SIZE), dmar_unit->fault_state[i]);
}
/* enable translation */
dmar_enable_translation(dmar_unit);
dmar_enable(dmar_unit);
}
static int add_iommu_device(struct iommu_domain *domain, uint16_t segment, uint8_t bus, uint8_t devfun)