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Re: [PATCH v3 2/5] memory: Add IOMMUTLBEvent
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From: |
David Gibson |
|
Subject: |
Re: [PATCH v3 2/5] memory: Add IOMMUTLBEvent |
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Date: |
Wed, 18 Nov 2020 16:22:35 +1100 |
On Mon, Nov 16, 2020 at 05:55:03PM +0100, Eugenio Pérez wrote:
> This way we can tell between regular IOMMUTLBEntry (entry of IOMMU
> hardware) and notifications.
>
> In the notifications, we set explicitly if it is a MAPs or an UNMAP,
> instead of trusting in entry permissions to differentiate them.
>
> Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
> Reviewed-by: Peter Xu <peterx@redhat.com>
> Reviewed-by: Juan Quintela <quintela@redhat.com>
> Acked-by: Jason Wang <jasowang@redhat.com>
ppc parts
Acked-by: David Gibson <david@gibson.dropbear.id.au>
> ---
> include/exec/memory.h | 27 ++++++------
> hw/arm/smmu-common.c | 13 +++---
> hw/arm/smmuv3.c | 13 +++---
> hw/i386/intel_iommu.c | 88 ++++++++++++++++++++++------------------
> hw/misc/tz-mpc.c | 32 ++++++++-------
> hw/ppc/spapr_iommu.c | 15 +++----
> hw/s390x/s390-pci-inst.c | 27 +++++++-----
> hw/virtio/virtio-iommu.c | 30 +++++++-------
> softmmu/memory.c | 20 ++++-----
> 9 files changed, 143 insertions(+), 122 deletions(-)
>
> diff --git a/include/exec/memory.h b/include/exec/memory.h
> index d8456ccf52..e86b5e92da 100644
> --- a/include/exec/memory.h
> +++ b/include/exec/memory.h
> @@ -116,6 +116,11 @@ struct IOMMUNotifier {
> };
> typedef struct IOMMUNotifier IOMMUNotifier;
>
> +typedef struct IOMMUTLBEvent {
> + IOMMUNotifierFlag type;
> + IOMMUTLBEntry entry;
> +} IOMMUTLBEvent;
> +
> /* RAM is pre-allocated and passed into qemu_ram_alloc_from_ptr */
> #define RAM_PREALLOC (1 << 0)
>
> @@ -1326,24 +1331,18 @@ uint64_t
> memory_region_iommu_get_min_page_size(IOMMUMemoryRegion *iommu_mr);
> /**
> * memory_region_notify_iommu: notify a change in an IOMMU translation entry.
> *
> - * The notification type will be decided by entry.perm bits:
> - *
> - * - For UNMAP (cache invalidation) notifies: set entry.perm to IOMMU_NONE.
> - * - For MAP (newly added entry) notifies: set entry.perm to the
> - * permission of the page (which is definitely !IOMMU_NONE).
> - *
> * Note: for any IOMMU implementation, an in-place mapping change
> * should be notified with an UNMAP followed by a MAP.
> *
> * @iommu_mr: the memory region that was changed
> * @iommu_idx: the IOMMU index for the translation table which has changed
> - * @entry: the new entry in the IOMMU translation table. The entry
> - * replaces all old entries for the same virtual I/O address range.
> - * Deleted entries have .@perm == 0.
> + * @event: TLB event with the new entry in the IOMMU translation table.
> + * The entry replaces all old entries for the same virtual I/O
> address
> + * range.
> */
> void memory_region_notify_iommu(IOMMUMemoryRegion *iommu_mr,
> int iommu_idx,
> - IOMMUTLBEntry entry);
> + IOMMUTLBEvent event);
>
> /**
> * memory_region_notify_iommu_one: notify a change in an IOMMU translation
> @@ -1353,12 +1352,12 @@ void memory_region_notify_iommu(IOMMUMemoryRegion
> *iommu_mr,
> * notifies a specific notifier, not all of them.
> *
> * @notifier: the notifier to be notified
> - * @entry: the new entry in the IOMMU translation table. The entry
> - * replaces all old entries for the same virtual I/O address range.
> - * Deleted entries have .@perm == 0.
> + * @event: TLB event with the new entry in the IOMMU translation table.
> + * The entry replaces all old entries for the same virtual I/O
> address
> + * range.
> */
> void memory_region_notify_iommu_one(IOMMUNotifier *notifier,
> - IOMMUTLBEntry *entry);
> + IOMMUTLBEvent *event);
>
> /**
> * memory_region_register_iommu_notifier: register a notifier for changes to
> diff --git a/hw/arm/smmu-common.c b/hw/arm/smmu-common.c
> index 88d2c454f0..405d5c5325 100644
> --- a/hw/arm/smmu-common.c
> +++ b/hw/arm/smmu-common.c
> @@ -465,14 +465,15 @@ IOMMUMemoryRegion *smmu_iommu_mr(SMMUState *s, uint32_t
> sid)
> /* Unmap the whole notifier's range */
> static void smmu_unmap_notifier_range(IOMMUNotifier *n)
> {
> - IOMMUTLBEntry entry;
> + IOMMUTLBEvent event;
>
> - entry.target_as = &address_space_memory;
> - entry.iova = n->start;
> - entry.perm = IOMMU_NONE;
> - entry.addr_mask = n->end - n->start;
> + event.type = IOMMU_NOTIFIER_UNMAP;
> + event.entry.target_as = &address_space_memory;
> + event.entry.iova = n->start;
> + event.entry.perm = IOMMU_NONE;
> + event.entry.addr_mask = n->end - n->start;
>
> - memory_region_notify_iommu_one(n, &entry);
> + memory_region_notify_iommu_one(n, &event);
> }
>
> /* Unmap all notifiers attached to @mr */
> diff --git a/hw/arm/smmuv3.c b/hw/arm/smmuv3.c
> index 273f5f7dce..bbca0e9f20 100644
> --- a/hw/arm/smmuv3.c
> +++ b/hw/arm/smmuv3.c
> @@ -800,7 +800,7 @@ static void smmuv3_notify_iova(IOMMUMemoryRegion *mr,
> uint8_t tg, uint64_t num_pages)
> {
> SMMUDevice *sdev = container_of(mr, SMMUDevice, iommu);
> - IOMMUTLBEntry entry;
> + IOMMUTLBEvent event;
> uint8_t granule = tg;
>
> if (!tg) {
> @@ -823,12 +823,13 @@ static void smmuv3_notify_iova(IOMMUMemoryRegion *mr,
> granule = tt->granule_sz;
> }
>
> - entry.target_as = &address_space_memory;
> - entry.iova = iova;
> - entry.addr_mask = num_pages * (1 << granule) - 1;
> - entry.perm = IOMMU_NONE;
> + event.type = IOMMU_NOTIFIER_UNMAP;
> + event.entry.target_as = &address_space_memory;
> + event.entry.iova = iova;
> + event.entry.addr_mask = num_pages * (1 << granule) - 1;
> + event.entry.perm = IOMMU_NONE;
>
> - memory_region_notify_iommu_one(n, &entry);
> + memory_region_notify_iommu_one(n, &event);
> }
>
> /* invalidate an asid/iova range tuple in all mr's */
> diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
> index 067593b9e4..56180b1c43 100644
> --- a/hw/i386/intel_iommu.c
> +++ b/hw/i386/intel_iommu.c
> @@ -1073,7 +1073,7 @@ static int vtd_iova_to_slpte(IntelIOMMUState *s,
> VTDContextEntry *ce,
> }
> }
>
> -typedef int (*vtd_page_walk_hook)(IOMMUTLBEntry *entry, void *private);
> +typedef int (*vtd_page_walk_hook)(IOMMUTLBEvent *event, void *private);
>
> /**
> * Constant information used during page walking
> @@ -1094,11 +1094,12 @@ typedef struct {
> uint16_t domain_id;
> } vtd_page_walk_info;
>
> -static int vtd_page_walk_one(IOMMUTLBEntry *entry, vtd_page_walk_info *info)
> +static int vtd_page_walk_one(IOMMUTLBEvent *event, vtd_page_walk_info *info)
> {
> VTDAddressSpace *as = info->as;
> vtd_page_walk_hook hook_fn = info->hook_fn;
> void *private = info->private;
> + IOMMUTLBEntry *entry = &event->entry;
> DMAMap target = {
> .iova = entry->iova,
> .size = entry->addr_mask,
> @@ -1107,7 +1108,7 @@ static int vtd_page_walk_one(IOMMUTLBEntry *entry,
> vtd_page_walk_info *info)
> };
> DMAMap *mapped = iova_tree_find(as->iova_tree, &target);
>
> - if (entry->perm == IOMMU_NONE && !info->notify_unmap) {
> + if (event->type == IOMMU_NOTIFIER_UNMAP && !info->notify_unmap) {
> trace_vtd_page_walk_one_skip_unmap(entry->iova, entry->addr_mask);
> return 0;
> }
> @@ -1115,7 +1116,7 @@ static int vtd_page_walk_one(IOMMUTLBEntry *entry,
> vtd_page_walk_info *info)
> assert(hook_fn);
>
> /* Update local IOVA mapped ranges */
> - if (entry->perm) {
> + if (event->type == IOMMU_NOTIFIER_MAP) {
> if (mapped) {
> /* If it's exactly the same translation, skip */
> if (!memcmp(mapped, &target, sizeof(target))) {
> @@ -1141,19 +1142,21 @@ static int vtd_page_walk_one(IOMMUTLBEntry *entry,
> vtd_page_walk_info *info)
> int ret;
>
> /* Emulate an UNMAP */
> + event->type = IOMMU_NOTIFIER_UNMAP;
> entry->perm = IOMMU_NONE;
> trace_vtd_page_walk_one(info->domain_id,
> entry->iova,
> entry->translated_addr,
> entry->addr_mask,
> entry->perm);
> - ret = hook_fn(entry, private);
> + ret = hook_fn(event, private);
> if (ret) {
> return ret;
> }
> /* Drop any existing mapping */
> iova_tree_remove(as->iova_tree, &target);
> - /* Recover the correct permission */
> + /* Recover the correct type */
> + event->type = IOMMU_NOTIFIER_MAP;
> entry->perm = cache_perm;
> }
> }
> @@ -1170,7 +1173,7 @@ static int vtd_page_walk_one(IOMMUTLBEntry *entry,
> vtd_page_walk_info *info)
> trace_vtd_page_walk_one(info->domain_id, entry->iova,
> entry->translated_addr, entry->addr_mask,
> entry->perm);
> - return hook_fn(entry, private);
> + return hook_fn(event, private);
> }
>
> /**
> @@ -1191,7 +1194,7 @@ static int vtd_page_walk_level(dma_addr_t addr,
> uint64_t start,
> uint32_t offset;
> uint64_t slpte;
> uint64_t subpage_size, subpage_mask;
> - IOMMUTLBEntry entry;
> + IOMMUTLBEvent event;
> uint64_t iova = start;
> uint64_t iova_next;
> int ret = 0;
> @@ -1245,13 +1248,15 @@ static int vtd_page_walk_level(dma_addr_t addr,
> uint64_t start,
> *
> * In either case, we send an IOTLB notification down.
> */
> - entry.target_as = &address_space_memory;
> - entry.iova = iova & subpage_mask;
> - entry.perm = IOMMU_ACCESS_FLAG(read_cur, write_cur);
> - entry.addr_mask = ~subpage_mask;
> + event.entry.target_as = &address_space_memory;
> + event.entry.iova = iova & subpage_mask;
> + event.entry.perm = IOMMU_ACCESS_FLAG(read_cur, write_cur);
> + event.entry.addr_mask = ~subpage_mask;
> /* NOTE: this is only meaningful if entry_valid == true */
> - entry.translated_addr = vtd_get_slpte_addr(slpte, info->aw);
> - ret = vtd_page_walk_one(&entry, info);
> + event.entry.translated_addr = vtd_get_slpte_addr(slpte,
> info->aw);
> + event.type = event.entry.perm ? IOMMU_NOTIFIER_MAP :
> + IOMMU_NOTIFIER_UNMAP;
> + ret = vtd_page_walk_one(&event, info);
> }
>
> if (ret < 0) {
> @@ -1430,10 +1435,10 @@ static int vtd_dev_to_context_entry(IntelIOMMUState
> *s, uint8_t bus_num,
> return 0;
> }
>
> -static int vtd_sync_shadow_page_hook(IOMMUTLBEntry *entry,
> +static int vtd_sync_shadow_page_hook(IOMMUTLBEvent *event,
> void *private)
> {
> - memory_region_notify_iommu((IOMMUMemoryRegion *)private, 0, *entry);
> + memory_region_notify_iommu(private, 0, *event);
> return 0;
> }
>
> @@ -1993,14 +1998,17 @@ static void
> vtd_iotlb_page_invalidate_notify(IntelIOMMUState *s,
> * page tables. We just deliver the PSI down to
> * invalidate caches.
> */
> - IOMMUTLBEntry entry = {
> - .target_as = &address_space_memory,
> - .iova = addr,
> - .translated_addr = 0,
> - .addr_mask = size - 1,
> - .perm = IOMMU_NONE,
> + IOMMUTLBEvent event = {
> + .type = IOMMU_NOTIFIER_UNMAP,
> + .entry = {
> + .target_as = &address_space_memory,
> + .iova = addr,
> + .translated_addr = 0,
> + .addr_mask = size - 1,
> + .perm = IOMMU_NONE,
> + },
> };
> - memory_region_notify_iommu(&vtd_as->iommu, 0, entry);
> + memory_region_notify_iommu(&vtd_as->iommu, 0, event);
> }
> }
> }
> @@ -2412,7 +2420,7 @@ static bool
> vtd_process_device_iotlb_desc(IntelIOMMUState *s,
> VTDInvDesc *inv_desc)
> {
> VTDAddressSpace *vtd_dev_as;
> - IOMMUTLBEntry entry;
> + IOMMUTLBEvent event;
> struct VTDBus *vtd_bus;
> hwaddr addr;
> uint64_t sz;
> @@ -2460,12 +2468,13 @@ static bool
> vtd_process_device_iotlb_desc(IntelIOMMUState *s,
> sz = VTD_PAGE_SIZE;
> }
>
> - entry.target_as = &vtd_dev_as->as;
> - entry.addr_mask = sz - 1;
> - entry.iova = addr;
> - entry.perm = IOMMU_NONE;
> - entry.translated_addr = 0;
> - memory_region_notify_iommu(&vtd_dev_as->iommu, 0, entry);
> + event.type = IOMMU_NOTIFIER_UNMAP;
> + event.entry.target_as = &vtd_dev_as->as;
> + event.entry.addr_mask = sz - 1;
> + event.entry.iova = addr;
> + event.entry.perm = IOMMU_NONE;
> + event.entry.translated_addr = 0;
> + memory_region_notify_iommu(&vtd_dev_as->iommu, 0, event);
>
> done:
> return true;
> @@ -3485,19 +3494,20 @@ static void vtd_address_space_unmap(VTDAddressSpace
> *as, IOMMUNotifier *n)
> size = remain = end - start + 1;
>
> while (remain >= VTD_PAGE_SIZE) {
> - IOMMUTLBEntry entry;
> + IOMMUTLBEvent event;
> uint64_t mask = get_naturally_aligned_size(start, remain,
> s->aw_bits);
>
> assert(mask);
>
> - entry.iova = start;
> - entry.addr_mask = mask - 1;
> - entry.target_as = &address_space_memory;
> - entry.perm = IOMMU_NONE;
> + event.type = IOMMU_NOTIFIER_UNMAP;
> + event.entry.iova = start;
> + event.entry.addr_mask = mask - 1;
> + event.entry.target_as = &address_space_memory;
> + event.entry.perm = IOMMU_NONE;
> /* This field is meaningless for unmap */
> - entry.translated_addr = 0;
> + event.entry.translated_addr = 0;
>
> - memory_region_notify_iommu_one(n, &entry);
> + memory_region_notify_iommu_one(n, &event);
>
> start += mask;
> remain -= mask;
> @@ -3533,9 +3543,9 @@ static void
> vtd_address_space_refresh_all(IntelIOMMUState *s)
> vtd_switch_address_space_all(s);
> }
>
> -static int vtd_replay_hook(IOMMUTLBEntry *entry, void *private)
> +static int vtd_replay_hook(IOMMUTLBEvent *event, void *private)
> {
> - memory_region_notify_iommu_one((IOMMUNotifier *)private, entry);
> + memory_region_notify_iommu_one(private, event);
> return 0;
> }
>
> diff --git a/hw/misc/tz-mpc.c b/hw/misc/tz-mpc.c
> index 98f151237f..30481e1c90 100644
> --- a/hw/misc/tz-mpc.c
> +++ b/hw/misc/tz-mpc.c
> @@ -82,8 +82,10 @@ static void tz_mpc_iommu_notify(TZMPC *s, uint32_t lutidx,
> /* Called when the LUT word at lutidx has changed from oldlut to newlut;
> * must call the IOMMU notifiers for the changed blocks.
> */
> - IOMMUTLBEntry entry = {
> - .addr_mask = s->blocksize - 1,
> + IOMMUTLBEvent event = {
> + .entry = {
> + .addr_mask = s->blocksize - 1,
> + }
> };
> hwaddr addr = lutidx * s->blocksize * 32;
> int i;
> @@ -100,26 +102,28 @@ static void tz_mpc_iommu_notify(TZMPC *s, uint32_t
> lutidx,
> block_is_ns = newlut & (1 << i);
>
> trace_tz_mpc_iommu_notify(addr);
> - entry.iova = addr;
> - entry.translated_addr = addr;
> + event.entry.iova = addr;
> + event.entry.translated_addr = addr;
>
> - entry.perm = IOMMU_NONE;
> - memory_region_notify_iommu(&s->upstream, IOMMU_IDX_S, entry);
> - memory_region_notify_iommu(&s->upstream, IOMMU_IDX_NS, entry);
> + event.type = IOMMU_NOTIFIER_UNMAP;
> + event.entry.perm = IOMMU_NONE;
> + memory_region_notify_iommu(&s->upstream, IOMMU_IDX_S, event);
> + memory_region_notify_iommu(&s->upstream, IOMMU_IDX_NS, event);
>
> - entry.perm = IOMMU_RW;
> + event.type = IOMMU_NOTIFIER_MAP;
> + event.entry.perm = IOMMU_RW;
> if (block_is_ns) {
> - entry.target_as = &s->blocked_io_as;
> + event.entry.target_as = &s->blocked_io_as;
> } else {
> - entry.target_as = &s->downstream_as;
> + event.entry.target_as = &s->downstream_as;
> }
> - memory_region_notify_iommu(&s->upstream, IOMMU_IDX_S, entry);
> + memory_region_notify_iommu(&s->upstream, IOMMU_IDX_S, event);
> if (block_is_ns) {
> - entry.target_as = &s->downstream_as;
> + event.entry.target_as = &s->downstream_as;
> } else {
> - entry.target_as = &s->blocked_io_as;
> + event.entry.target_as = &s->blocked_io_as;
> }
> - memory_region_notify_iommu(&s->upstream, IOMMU_IDX_NS, entry);
> + memory_region_notify_iommu(&s->upstream, IOMMU_IDX_NS, event);
> }
> }
>
> diff --git a/hw/ppc/spapr_iommu.c b/hw/ppc/spapr_iommu.c
> index 0fecabc135..8e237d0397 100644
> --- a/hw/ppc/spapr_iommu.c
> +++ b/hw/ppc/spapr_iommu.c
> @@ -445,7 +445,7 @@ static void spapr_tce_reset(DeviceState *dev)
> static target_ulong put_tce_emu(SpaprTceTable *tcet, target_ulong ioba,
> target_ulong tce)
> {
> - IOMMUTLBEntry entry;
> + IOMMUTLBEvent event;
> hwaddr page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
> unsigned long index = (ioba - tcet->bus_offset) >> tcet->page_shift;
>
> @@ -457,12 +457,13 @@ static target_ulong put_tce_emu(SpaprTceTable *tcet,
> target_ulong ioba,
>
> tcet->table[index] = tce;
>
> - entry.target_as = &address_space_memory,
> - entry.iova = (ioba - tcet->bus_offset) & page_mask;
> - entry.translated_addr = tce & page_mask;
> - entry.addr_mask = ~page_mask;
> - entry.perm = spapr_tce_iommu_access_flags(tce);
> - memory_region_notify_iommu(&tcet->iommu, 0, entry);
> + event.entry.target_as = &address_space_memory,
> + event.entry.iova = (ioba - tcet->bus_offset) & page_mask;
> + event.entry.translated_addr = tce & page_mask;
> + event.entry.addr_mask = ~page_mask;
> + event.entry.perm = spapr_tce_iommu_access_flags(tce);
> + event.type = event.entry.perm ? IOMMU_NOTIFIER_MAP :
> IOMMU_NOTIFIER_UNMAP;
> + memory_region_notify_iommu(&tcet->iommu, 0, event);
>
> return H_SUCCESS;
> }
> diff --git a/hw/s390x/s390-pci-inst.c b/hw/s390x/s390-pci-inst.c
> index 58cd041d17..d7caeeea0e 100644
> --- a/hw/s390x/s390-pci-inst.c
> +++ b/hw/s390x/s390-pci-inst.c
> @@ -590,15 +590,18 @@ static uint32_t s390_pci_update_iotlb(S390PCIIOMMU
> *iommu,
> S390IOTLBEntry *entry)
> {
> S390IOTLBEntry *cache = g_hash_table_lookup(iommu->iotlb, &entry->iova);
> - IOMMUTLBEntry notify = {
> - .target_as = &address_space_memory,
> - .iova = entry->iova,
> - .translated_addr = entry->translated_addr,
> - .perm = entry->perm,
> - .addr_mask = ~PAGE_MASK,
> + IOMMUTLBEvent event = {
> + .type = entry->perm ? IOMMU_NOTIFIER_MAP : IOMMU_NOTIFIER_UNMAP,
> + .entry = {
> + .target_as = &address_space_memory,
> + .iova = entry->iova,
> + .translated_addr = entry->translated_addr,
> + .perm = entry->perm,
> + .addr_mask = ~PAGE_MASK,
> + },
> };
>
> - if (entry->perm == IOMMU_NONE) {
> + if (event.type == IOMMU_NOTIFIER_UNMAP) {
> if (!cache) {
> goto out;
> }
> @@ -611,9 +614,11 @@ static uint32_t s390_pci_update_iotlb(S390PCIIOMMU
> *iommu,
> goto out;
> }
>
> - notify.perm = IOMMU_NONE;
> - memory_region_notify_iommu(&iommu->iommu_mr, 0, notify);
> - notify.perm = entry->perm;
> + event.type = IOMMU_NOTIFIER_UNMAP;
> + event.entry.perm = IOMMU_NONE;
> + memory_region_notify_iommu(&iommu->iommu_mr, 0, event);
> + event.type = IOMMU_NOTIFIER_MAP;
> + event.entry.perm = entry->perm;
> }
>
> cache = g_new(S390IOTLBEntry, 1);
> @@ -625,7 +630,7 @@ static uint32_t s390_pci_update_iotlb(S390PCIIOMMU *iommu,
> dec_dma_avail(iommu);
> }
>
> - memory_region_notify_iommu(&iommu->iommu_mr, 0, notify);
> + memory_region_notify_iommu(&iommu->iommu_mr, 0, event);
>
> out:
> return iommu->dma_limit ? iommu->dma_limit->avail : 1;
> diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
> index fc5c75d693..cea8811295 100644
> --- a/hw/virtio/virtio-iommu.c
> +++ b/hw/virtio/virtio-iommu.c
> @@ -129,7 +129,7 @@ static void virtio_iommu_notify_map(IOMMUMemoryRegion
> *mr, hwaddr virt_start,
> hwaddr virt_end, hwaddr paddr,
> uint32_t flags)
> {
> - IOMMUTLBEntry entry;
> + IOMMUTLBEvent event;
> IOMMUAccessFlags perm = IOMMU_ACCESS_FLAG(flags &
> VIRTIO_IOMMU_MAP_F_READ,
> flags &
> VIRTIO_IOMMU_MAP_F_WRITE);
>
> @@ -141,19 +141,20 @@ static void virtio_iommu_notify_map(IOMMUMemoryRegion
> *mr, hwaddr virt_start,
> trace_virtio_iommu_notify_map(mr->parent_obj.name, virt_start, virt_end,
> paddr, perm);
>
> - entry.target_as = &address_space_memory;
> - entry.addr_mask = virt_end - virt_start;
> - entry.iova = virt_start;
> - entry.perm = perm;
> - entry.translated_addr = paddr;
> + event.type = IOMMU_NOTIFIER_MAP;
> + event.entry.target_as = &address_space_memory;
> + event.entry.addr_mask = virt_end - virt_start;
> + event.entry.iova = virt_start;
> + event.entry.perm = perm;
> + event.entry.translated_addr = paddr;
>
> - memory_region_notify_iommu(mr, 0, entry);
> + memory_region_notify_iommu(mr, 0, event);
> }
>
> static void virtio_iommu_notify_unmap(IOMMUMemoryRegion *mr, hwaddr
> virt_start,
> hwaddr virt_end)
> {
> - IOMMUTLBEntry entry;
> + IOMMUTLBEvent event;
>
> if (!(mr->iommu_notify_flags & IOMMU_NOTIFIER_UNMAP)) {
> return;
> @@ -161,13 +162,14 @@ static void virtio_iommu_notify_unmap(IOMMUMemoryRegion
> *mr, hwaddr virt_start,
>
> trace_virtio_iommu_notify_unmap(mr->parent_obj.name, virt_start,
> virt_end);
>
> - entry.target_as = &address_space_memory;
> - entry.addr_mask = virt_end - virt_start;
> - entry.iova = virt_start;
> - entry.perm = IOMMU_NONE;
> - entry.translated_addr = 0;
> + event.type = IOMMU_NOTIFIER_UNMAP;
> + event.entry.target_as = &address_space_memory;
> + event.entry.addr_mask = virt_end - virt_start;
> + event.entry.iova = virt_start;
> + event.entry.perm = IOMMU_NONE;
> + event.entry.translated_addr = 0;
>
> - memory_region_notify_iommu(mr, 0, entry);
> + memory_region_notify_iommu(mr, 0, event);
> }
>
> static gboolean virtio_iommu_notify_unmap_cb(gpointer key, gpointer value,
> diff --git a/softmmu/memory.c b/softmmu/memory.c
> index 2b11ac5238..ca281edaea 100644
> --- a/softmmu/memory.c
> +++ b/softmmu/memory.c
> @@ -1933,11 +1933,15 @@ void
> memory_region_unregister_iommu_notifier(MemoryRegion *mr,
> }
>
> void memory_region_notify_iommu_one(IOMMUNotifier *notifier,
> - IOMMUTLBEntry *entry)
> + IOMMUTLBEvent *event)
> {
> - IOMMUNotifierFlag request_flags;
> + IOMMUTLBEntry *entry = &event->entry;
> hwaddr entry_end = entry->iova + entry->addr_mask;
>
> + if (event->type == IOMMU_NOTIFIER_UNMAP) {
> + assert(entry->perm == IOMMU_NONE);
> + }
> +
> /*
> * Skip the notification if the notification does not overlap
> * with registered range.
> @@ -1948,20 +1952,14 @@ void memory_region_notify_iommu_one(IOMMUNotifier
> *notifier,
>
> assert(entry->iova >= notifier->start && entry_end <= notifier->end);
>
> - if (entry->perm & IOMMU_RW) {
> - request_flags = IOMMU_NOTIFIER_MAP;
> - } else {
> - request_flags = IOMMU_NOTIFIER_UNMAP;
> - }
> -
> - if (notifier->notifier_flags & request_flags) {
> + if (event->type & notifier->notifier_flags) {
> notifier->notify(notifier, entry);
> }
> }
>
> void memory_region_notify_iommu(IOMMUMemoryRegion *iommu_mr,
> int iommu_idx,
> - IOMMUTLBEntry entry)
> + IOMMUTLBEvent event)
> {
> IOMMUNotifier *iommu_notifier;
>
> @@ -1969,7 +1967,7 @@ void memory_region_notify_iommu(IOMMUMemoryRegion
> *iommu_mr,
>
> IOMMU_NOTIFIER_FOREACH(iommu_notifier, iommu_mr) {
> if (iommu_notifier->iommu_idx == iommu_idx) {
> - memory_region_notify_iommu_one(iommu_notifier, &entry);
> + memory_region_notify_iommu_one(iommu_notifier, &event);
> }
> }
> }
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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- [PATCH v3 0/5] memory: Skip assertion in memory_region_unregister_iommu_notifier, Eugenio Pérez, 2020/11/16
- [PATCH v3 1/5] memory: Rename memory_region_notify_one to memory_region_notify_iommu_one, Eugenio Pérez, 2020/11/16
- [PATCH v3 2/5] memory: Add IOMMUTLBEvent, Eugenio Pérez, 2020/11/16
- [PATCH v3 3/5] memory: Add IOMMU_NOTIFIER_DEVIOTLB_UNMAP IOMMUTLBNotificationType, Eugenio Pérez, 2020/11/16
- [PATCH v3 4/5] intel_iommu: Skip page walking on device iotlb invalidations, Eugenio Pérez, 2020/11/16
- [PATCH v3 5/5] memory: Skip bad range assertion if notifier is DEVIOTLB_UNMAP type, Eugenio Pérez, 2020/11/16