2016-11-28 23:51 GMT+08:00 Aviv B.D <bd.a...@gmail.com>: > From: "Aviv Ben-David" <bd.a...@gmail.com> > > Adds a list of registered vtd_as's to intel iommu state to save > iteration over each PCI device in a search of the corrosponding domain. > > Signed-off-by: Aviv Ben-David <bd.a...@gmail.com> > --- > hw/i386/intel_iommu.c | 94 > ++++++++++++++++++++++++++++++++++++++---- > hw/i386/intel_iommu_internal.h | 2 + > include/hw/i386/intel_iommu.h | 9 ++++ > 3 files changed, 98 insertions(+), 7 deletions(-) > > diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c > index 05973b9..d872969 100644 > --- a/hw/i386/intel_iommu.c > +++ b/hw/i386/intel_iommu.c > @@ -679,7 +679,7 @@ static int vtd_gpa_to_slpte(VTDContextEntry *ce, uint64_t > gpa, > } > *reads = (*reads) && (slpte & VTD_SL_R); > *writes = (*writes) && (slpte & VTD_SL_W); > - if (!(slpte & access_right_check)) { > + if (!(slpte & access_right_check) && !(flags & IOMMU_NO_FAIL)) { > VTD_DPRINTF(GENERAL, "error: lack of %s permission for " > "gpa 0x%"PRIx64 " slpte 0x%"PRIx64, > (flags & IOMMU_WO ? "write" : "read"), gpa, slpte); > @@ -978,6 +978,23 @@ static VTDBus *vtd_find_as_from_bus_num(IntelIOMMUState > *s, uint8_t bus_num) > return vtd_bus; > } > > +static int vtd_get_did_dev(IntelIOMMUState *s, uint8_t bus_num, uint8_t > devfn, > + uint16_t *domain_id) > +{ > + VTDContextEntry ce; > + int ret_fr; > + > + assert(domain_id); > + > + ret_fr = vtd_dev_to_context_entry(s, bus_num, devfn, &ce); > + if (ret_fr) { > + return -1; > + } > + > + *domain_id = VTD_CONTEXT_ENTRY_DID(ce.hi); > + return 0; > +} > + > /* Do a context-cache device-selective invalidation. > * @func_mask: FM field after shifting > */ > @@ -1064,6 +1081,45 @@ static void > vtd_iotlb_domain_invalidate(IntelIOMMUState *s, uint16_t domain_id) > &domain_id); > } > > +static void vtd_iotlb_page_invalidate_notify(IntelIOMMUState *s, > + uint16_t domain_id, hwaddr addr, > + uint8_t am) > +{ > + IntelIOMMUNotifierNode *node; > + > + QLIST_FOREACH(node, &(s->notifiers_list), next) { > + VTDAddressSpace *vtd_as = node->vtd_as; > + uint16_t vfio_domain_id; > + int ret = vtd_get_did_dev(s, pci_bus_num(vtd_as->bus), vtd_as->devfn, > + &vfio_domain_id); > + > + if (!ret && domain_id == vfio_domain_id) { > + hwaddr original_addr = addr; > + > + while (addr < original_addr + (1 << am) * VTD_PAGE_SIZE) { > + IOMMUTLBEntry entry = s->iommu_ops.translate( > + > &node->vtd_as->iommu, > + addr, > + IOMMU_NO_FAIL); > + > + if (entry.perm == IOMMU_NONE && > + node->notifier_flag & IOMMU_NOTIFIER_UNMAP) { > + entry.target_as = &address_space_memory; > + entry.iova = addr & VTD_PAGE_MASK_4K; > + entry.translated_addr = 0; > + entry.addr_mask = ~VTD_PAGE_MASK(VTD_PAGE_SHIFT); > + memory_region_notify_iommu(&node->vtd_as->iommu, entry); > + addr += VTD_PAGE_SIZE; > + } else if (node->notifier_flag & IOMMU_NOTIFIER_MAP) { > + memory_region_notify_iommu(&node->vtd_as->iommu, > entry); > + addr += entry.addr_mask + 1; > + } > + } > + } > + } > +} > + > static void vtd_iotlb_page_invalidate(IntelIOMMUState *s, uint16_t domain_id, > hwaddr addr, uint8_t am) > { > @@ -1074,6 +1130,8 @@ static void vtd_iotlb_page_invalidate(IntelIOMMUState > *s, uint16_t domain_id, > info.addr = addr; > info.mask = ~((1 << am) - 1); > g_hash_table_foreach_remove(s->iotlb, vtd_hash_remove_by_page, &info); > + > + vtd_iotlb_page_invalidate_notify(s, domain_id, addr, am); > } > > /* Flush IOTLB > @@ -1999,15 +2057,37 @@ static void > vtd_iommu_notify_flag_changed(MemoryRegion *iommu, > IOMMUNotifierFlag new) > { > VTDAddressSpace *vtd_as = container_of(iommu, VTDAddressSpace, iommu); > + IntelIOMMUState *s = vtd_as->iommu_state; > + IntelIOMMUNotifierNode *node = NULL; > + IntelIOMMUNotifierNode *next_node = NULL; > > - if (new & IOMMU_NOTIFIER_MAP) { > - error_report("Device at bus %s addr %02x.%d requires iommu " > - "notifier which is currently not supported by " > - "intel-iommu emulation", > - vtd_as->bus->qbus.name, PCI_SLOT(vtd_as->devfn), > - PCI_FUNC(vtd_as->devfn)); > + if (!s->cache_mode_enabled && new & IOMMU_NOTIFIER_MAP) { > + error_report("We need to set cache_mode=1 for intel-iommu to enable " > + "device assignment with IOMMU protection."); > exit(1); > } > + > + /* Add new ndoe if no mapping was exising before this call */
s /ndoe/node /exising/existing > + if (old == IOMMU_NOTIFIER_NONE) { Where is the declaration of "old"? > + node = g_malloc0(sizeof(*node)); > + node->vtd_as = vtd_as; > + node->notifier_flag = new; > + QLIST_INSERT_HEAD(&s->notifiers_list, node, next); > + return; > + } > + > + /* update notifier node with new flags */ > + QLIST_FOREACH_SAFE(node, &s->notifiers_list, next, next_node) { > + if (node->vtd_as == vtd_as) { > + if (new == IOMMU_NOTIFIER_NONE) { > + QLIST_REMOVE(node, next); > + g_free(node); > + } else { > + node->notifier_flag = new; > + } > + return; > + } > + } > } > > static const VMStateDescription vtd_vmstate = { > diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h > index 00cbe0d..c1b9cfc 100644 > --- a/hw/i386/intel_iommu_internal.h > +++ b/hw/i386/intel_iommu_internal.h > @@ -381,6 +381,8 @@ typedef struct VTDIOTLBPageInvInfo VTDIOTLBPageInvInfo; > #define VTD_PAGE_SHIFT_1G 30 > #define VTD_PAGE_MASK_1G (~((1ULL << VTD_PAGE_SHIFT_1G) - 1)) > > +#define VTD_PAGE_MASK(shift) (~((1ULL << (shift)) - 1)) > + > struct VTDRootEntry { > uint64_t val; > uint64_t rsvd; > diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h > index 749eef9..1a355c1 100644 > --- a/include/hw/i386/intel_iommu.h > +++ b/include/hw/i386/intel_iommu.h > @@ -63,6 +63,7 @@ typedef union VTD_IR_TableEntry VTD_IR_TableEntry; > typedef union VTD_IR_MSIAddress VTD_IR_MSIAddress; > typedef struct VTDIrq VTDIrq; > typedef struct VTD_MSIMessage VTD_MSIMessage; > +typedef struct IntelIOMMUNotifierNode IntelIOMMUNotifierNode; > > /* Context-Entry */ > struct VTDContextEntry { > @@ -247,6 +248,12 @@ struct VTD_MSIMessage { > /* When IR is enabled, all MSI/MSI-X data bits should be zero */ > #define VTD_IR_MSI_DATA (0) > > +struct IntelIOMMUNotifierNode { > + VTDAddressSpace *vtd_as; > + IOMMUNotifierFlag notifier_flag; > + QLIST_ENTRY(IntelIOMMUNotifierNode) next; > +}; > + > /* The iommu (DMAR) device state struct */ > struct IntelIOMMUState { > X86IOMMUState x86_iommu; > @@ -284,6 +291,8 @@ struct IntelIOMMUState { > MemoryRegionIOMMUOps iommu_ops; > GHashTable *vtd_as_by_busptr; /* VTDBus objects indexed by PCIBus* > reference */ > VTDBus *vtd_as_by_bus_num[VTD_PCI_BUS_MAX]; /* VTDBus objects indexed by > bus number */ > + /* list of registered notifiers */ > + QLIST_HEAD(, IntelIOMMUNotifierNode) notifiers_list; > > /* interrupt remapping */ > bool intr_enabled; /* Whether guest enabled IR */ > -- > 1.9.1 > >