This captures the guest PASID table entry modifications and
propagates the changes to host to attach a hwpt with type determined
per guest PGTT configuration.
When PGTT is Pass-through(100b), the hwpt on host side is a stage-2
page table(GPA->HPA). When PGTT is First-stage Translation only(001b),
the hwpt on host side is a nested page table.
The guest page table is configured as stage-1 page table (gIOVA->GPA)
whose translation result would further go through host VT-d stage-2
page table(GPA->HPA) under nested translation mode. This is the key
to support gIOVA over stage-1 page table for Intel VT-d in
virtualization environment.
Stage-2 page table could be shared by different devices if there is
no conflict and devices link to same iommufd object, i.e. devices
under same host IOMMU can share same stage-2 page table. If there
is conflict, i.e. there is one device under non cache coherency
mode which is different from others, it requires a separate
stage-2 page table in non-CC mode.
See below example diagram:
IntelIOMMUState
|
V
.------------------. .------------------.
| VTDIOASContainer |--->| VTDIOASContainer |--->...
| (iommufd0) | | (iommufd1) |
.------------------. .------------------.
| |
| .-->...
V
.-------------------. .-------------------.
| VTDS2Hwpt(CC) |--->| VTDS2Hwpt(non-CC) |-->...
.-------------------. .-------------------.
| | |
| | |
.-----------. .-----------. .------------.
| IOMMUFD | | IOMMUFD | | IOMMUFD |
| Device(CC)| | Device(CC)| | Device |
| (iommufd0)| | (iommufd0)| | (non-CC) |
| | | | | (iommufd0) |
.-----------. .-----------. .------------.
Co-Authored-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
---
hw/i386/intel_iommu_internal.h | 16 +
include/hw/i386/intel_iommu.h | 30 ++
hw/i386/intel_iommu.c | 641 ++++++++++++++++++++++++++++++++-
hw/i386/trace-events | 8 +
4 files changed, 677 insertions(+), 18 deletions(-)
diff --git a/hw/i386/intel_iommu_internal.h b/hw/i386/intel_iommu_internal.h
index 16dc712e94..e33c9f54b5 100644
--- a/hw/i386/intel_iommu_internal.h
+++ b/hw/i386/intel_iommu_internal.h
@@ -199,6 +199,7 @@
#define VTD_ECAP_SMTS (1ULL << 43)
#define VTD_ECAP_SLTS (1ULL << 46)
#define VTD_ECAP_FLTS (1ULL << 47)
+#define VTD_ECAP_RPS (1ULL << 49)
#define VTD_ECAP_MASK (VTD_ECAP_SRS | VTD_ECAP_EAFS)
#define VTD_GET_PSS(val) (((val) >> 35) & 0x1f)
@@ -518,6 +519,14 @@ typedef struct VTDRootEntry VTDRootEntry;
#define VTD_SM_CONTEXT_ENTRY_RSVD_VAL0(aw) (0x1e0ULL | ~VTD_HAW_MASK(aw))
#define VTD_SM_CONTEXT_ENTRY_RSVD_VAL1 0xffffffffffe00000ULL
+enum VTDPASIDOp {
+ VTD_PASID_BIND,
+ VTD_PASID_UPDATE,
+ VTD_PASID_UNBIND,
+ VTD_OP_NUM
+};
+typedef enum VTDPASIDOp VTDPASIDOp;
+
typedef enum VTDPCInvType {
/* force reset all */
VTD_PASID_CACHE_FORCE_RESET = 0,
@@ -533,6 +542,7 @@ struct VTDPASIDCacheInfo {
uint32_t pasid;
PCIBus *bus;
uint16_t devfn;
+ bool error_happened;
};
typedef struct VTDPASIDCacheInfo VTDPASIDCacheInfo;
@@ -560,6 +570,12 @@ typedef struct VTDPASIDCacheInfo VTDPASIDCacheInfo;
#define VTD_SM_PASID_ENTRY_AW 7ULL /* Adjusted guest-address-width */
#define VTD_SM_PASID_ENTRY_DID(val) ((val) & VTD_DOMAIN_ID_MASK)
+#define VTD_SM_PASID_ENTRY_FLPM 3ULL
+#define VTD_SM_PASID_ENTRY_FLPTPTR (~0xfffULL)
+#define VTD_SM_PASID_ENTRY_SRE_BIT(val) (!!((val) & 1ULL))
+#define VTD_SM_PASID_ENTRY_WPE_BIT(val) (!!(((val) >> 4) & 1ULL))
+#define VTD_SM_PASID_ENTRY_EAFE_BIT(val) (!!(((val) >> 7) & 1ULL))
+
/* Second Level Page Translation Pointer*/
#define VTD_SM_PASID_ENTRY_SLPTPTR (~0xfffULL)
diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h
index c7b707a3d5..d3122cf699 100644
--- a/include/hw/i386/intel_iommu.h
+++ b/include/hw/i386/intel_iommu.h
@@ -65,6 +65,9 @@ typedef struct VTDPASIDEntry VTDPASIDEntry;
typedef struct VTDIOMMUFDDevice VTDIOMMUFDDevice;
typedef struct VTDPASIDCacheEntry VTDPASIDCacheEntry;
typedef struct VTDPASIDAddressSpace VTDPASIDAddressSpace;
+typedef struct VTDHwpt VTDHwpt;
+typedef struct VTDIOASContainer VTDIOASContainer;
+typedef struct VTDS2Hwpt VTDS2Hwpt;
/* Context-Entry */
struct VTDContextEntry {
@@ -102,14 +105,37 @@ struct pasid_key {
uint16_t sid;
};
+struct VTDIOASContainer {
+ IOMMUFDBackend *iommufd;
+ uint32_t ioas_id;
+ MemoryListener listener;
+ QLIST_HEAD(, VTDS2Hwpt) s2_hwpt_list;
+ QLIST_ENTRY(VTDIOASContainer) next;
+ Error *error;
+};
+
+struct VTDS2Hwpt {
+ uint32_t users;
+ uint32_t hwpt_id;
+ VTDIOASContainer *container;
+ QLIST_ENTRY(VTDS2Hwpt) next;
+};
+
+struct VTDHwpt {
+ uint32_t hwpt_id;
+ VTDS2Hwpt *s2_hwpt;
+};
+
struct VTDPASIDCacheEntry {
struct VTDPASIDEntry pasid_entry;
+ bool cache_filled;
};
struct VTDPASIDAddressSpace {
PCIBus *bus;
uint8_t devfn;
uint32_t pasid;
+ VTDHwpt hwpt;
IntelIOMMUState *iommu_state;
VTDContextCacheEntry context_cache_entry;
QLIST_ENTRY(VTDPASIDAddressSpace) next;
@@ -330,8 +356,12 @@ struct IntelIOMMUState {
/* list of VTDIOMMUFDDevices */
QLIST_HEAD(, VTDIOMMUFDDevice) vtd_idev_list;
+ QLIST_HEAD(, VTDIOASContainer) containers;
+
GHashTable *vtd_iommufd_dev; /* VTDIOMMUFDDevice */
+ VTDHwpt *s2_hwpt;
+
/* interrupt remapping */
bool intr_enabled; /* Whether guest enabled IR */
dma_addr_t intr_root; /* Interrupt remapping table pointer */
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index a1a1f23246..df93fcacd8 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -40,6 +40,7 @@
#include "migration/vmstate.h"
#include "trace.h"
#include "qemu/jhash.h"
+#include "sysemu/iommufd.h"
/* context entry operations */
#define VTD_CE_GET_RID2PASID(ce) \
@@ -771,6 +772,24 @@ static inline uint32_t vtd_sm_ce_get_pdt_entry_num(VTDContextEntry *ce)
return 1U << (VTD_SM_CONTEXT_ENTRY_PDTS(ce->val[0]) + 7);
}
+static inline uint32_t vtd_pe_get_fl_aw(VTDPASIDEntry *pe)
+{
+ return 48 + ((pe->val[2] >> 2) & VTD_SM_PASID_ENTRY_FLPM) * 9;
+}
+
+static inline dma_addr_t vtd_pe_get_flpt_base(VTDPASIDEntry *pe)
+{
+ return pe->val[2] & VTD_SM_PASID_ENTRY_FLPTPTR;
+}
+
+static inline void pasid_cache_info_set_error(VTDPASIDCacheInfo *pc_info)
+{
+ if (pc_info->error_happened) {
+ return;
+ }
+ pc_info->error_happened = true;
+}
+
static inline bool vtd_pdire_present(VTDPASIDDirEntry *pdire)
{
return pdire->val & 1;
@@ -1631,6 +1650,17 @@ static int vtd_address_space_sync(VTDAddressSpace *vtd_as)
return vtd_sync_shadow_page_table_range(vtd_as, &ce, 0, UINT64_MAX);
}
+static bool vtd_pe_pgtt_is_pt(VTDPASIDEntry *pe)
+{
+ return (VTD_PE_GET_TYPE(pe) == VTD_SM_PASID_ENTRY_PT);
+}
+
+/* check if pgtt is first stage translation */
+static bool vtd_pe_pgtt_is_flt(VTDPASIDEntry *pe)
+{
+ return (VTD_PE_GET_TYPE(pe) == VTD_SM_PASID_ENTRY_FLT);
+}
+
/*
* Check if specific device is configured to bypass address
* translation for DMA requests. In Scalable Mode, bypass
@@ -1652,7 +1682,7 @@ static bool vtd_dev_pt_enabled(IntelIOMMUState *s, VTDContextEntry *ce,
*/
return false;
}
- return (VTD_PE_GET_TYPE(&pe) == VTD_SM_PASID_ENTRY_PT);
+ return vtd_pe_pgtt_is_pt(&pe);
}
return (vtd_ce_get_type(ce) == VTD_CONTEXT_TT_PASS_THROUGH);
@@ -2091,6 +2121,543 @@ static void vtd_context_global_invalidate(IntelIOMMUState *s)
vtd_iommu_replay_all(s);
}
+static bool iommufd_listener_skipped_section(MemoryRegionSection *section)
+{
+ return !memory_region_is_ram(section->mr) ||
+ memory_region_is_protected(section->mr) ||
+ /*
+ * Sizing an enabled 64-bit BAR can cause spurious mappings to
+ * addresses in the upper part of the 64-bit address space. These
+ * are never accessed by the CPU and beyond the address width of
+ * some IOMMU hardware. TODO: VFIO should tell us the IOMMU width.
+ */
+ section->offset_within_address_space & (1ULL << 63);
+}
+
+static void iommufd_listener_region_add_s2domain(MemoryListener *listener,
+ MemoryRegionSection *section)
+{
+ VTDIOASContainer *container = container_of(listener,
+ VTDIOASContainer, listener);
+ IOMMUFDBackend *iommufd = container->iommufd;
+ uint32_t ioas_id = container->ioas_id;
+ hwaddr iova;
+ Int128 llend, llsize;
+ void *vaddr;
+ Error *err = NULL;
+ int ret;
+
+ if (iommufd_listener_skipped_section(section)) {
+ return;
+ }
+ iova = REAL_HOST_PAGE_ALIGN(section->offset_within_address_space);
+ llend = int128_make64(section->offset_within_address_space);
+ llend = int128_add(llend, section->size);
+ llend = int128_and(llend, int128_exts64(qemu_real_host_page_mask()));
+ llsize = int128_sub(llend, int128_make64(iova));
+ vaddr = memory_region_get_ram_ptr(section->mr) +
+ section->offset_within_region +
+ (iova - section->offset_within_address_space);
+
+ memory_region_ref(section->mr);
+
+ ret = iommufd_backend_map_dma(iommufd, ioas_id, iova, int128_get64(llsize),
+ vaddr, section->readonly);
+ if (!ret) {
+ return;
+ }
+
+ error_setg(&err,
+ "iommufd_listener_region_add_s2domain(%p, 0x%"HWADDR_PRIx", "
+ "0x%"HWADDR_PRIx", %p) = %d (%s)",
+ container, iova, int128_get64(llsize), vaddr, ret,
+ strerror(-ret));
+
+ if (memory_region_is_ram_device(section->mr)) {
+ /* Allow unexpected mappings not to be fatal for RAM devices */
+ error_report_err(err);
+ return;
+ }
+
+ if (!container->error) {
+ error_propagate_prepend(&container->error, err, "Region %s: ",
+ memory_region_name(section->mr));
+ } else {
+ error_free(err);
+ }
+}
+
+static void iommufd_listener_region_del_s2domain(MemoryListener *listener,
+ MemoryRegionSection *section)
+{
+ VTDIOASContainer *container = container_of(listener,
+ VTDIOASContainer, listener);
+ IOMMUFDBackend *iommufd = container->iommufd;
+ uint32_t ioas_id = container->ioas_id;
+ hwaddr iova;
+ Int128 llend, llsize;
+ int ret;
+
+ if (iommufd_listener_skipped_section(section)) {
+ return;
+ }
+ iova = REAL_HOST_PAGE_ALIGN(section->offset_within_address_space);
+ llend = int128_make64(section->offset_within_address_space);
+ llend = int128_add(llend, section->size);
+ llend = int128_and(llend, int128_exts64(qemu_real_host_page_mask()));
+ llsize = int128_sub(llend, int128_make64(iova));
+
+ ret = iommufd_backend_unmap_dma(iommufd, ioas_id,
+ iova, int128_get64(llsize));
+ if (ret) {
+ error_report("iommufd_listener_region_del_s2domain(%p, "
+ "0x%"HWADDR_PRIx", 0x%"HWADDR_PRIx") = %d (%s)",
+ container, iova, int128_get64(llsize), ret,
+ strerror(-ret));
+ }
+
+ memory_region_unref(section->mr);
+}
+
+static const MemoryListener iommufd_s2domain_memory_listener = {
+ .name = "iommufd_s2domain",
+ .priority = 1000,
+ .region_add = iommufd_listener_region_add_s2domain,
+ .region_del = iommufd_listener_region_del_s2domain,
+};
+
+static void vtd_init_s1_hwpt_data(struct iommu_hwpt_vtd_s1 *vtd,
+ VTDPASIDEntry *pe)
+{
+ memset(vtd, 0, sizeof(*vtd));
+
+ vtd->flags = (VTD_SM_PASID_ENTRY_SRE_BIT(pe->val[2]) ?
+ IOMMU_VTD_S1_SRE : 0) |
+ (VTD_SM_PASID_ENTRY_WPE_BIT(pe->val[2]) ?
+ IOMMU_VTD_S1_WPE : 0) |
+ (VTD_SM_PASID_ENTRY_EAFE_BIT(pe->val[2]) ?
+ IOMMU_VTD_S1_EAFE : 0);
+ vtd->addr_width = vtd_pe_get_fl_aw(pe);
+ vtd->pgtbl_addr = (uint64_t)vtd_pe_get_flpt_base(pe);
+}
+
+static int vtd_create_s1_hwpt(IOMMUFDDevice *idev,
+ VTDS2Hwpt *s2_hwpt, VTDHwpt *hwpt,
+ VTDPASIDEntry *pe, Error **errp)
+{
+ struct iommu_hwpt_vtd_s1 vtd;
+ uint32_t hwpt_id, s2_hwpt_id = s2_hwpt->hwpt_id;
+ int ret;
+
+ vtd_init_s1_hwpt_data(&vtd, pe);
+
+ ret = iommufd_backend_alloc_hwpt(idev->iommufd, idev->dev_id,
+ s2_hwpt_id, 0, IOMMU_HWPT_DATA_VTD_S1,
+ sizeof(vtd), &vtd, &hwpt_id);
+ if (ret) {
+ error_setg(errp, "Failed to allocate stage-1 page table, dev_id %d",
+ idev->dev_id);
+ return ret;
+ }
+
+ hwpt->hwpt_id = hwpt_id;
+
+ return 0;
+}
+
+static void vtd_destroy_s1_hwpt(IOMMUFDDevice *idev, VTDHwpt *hwpt)
+{
+ iommufd_backend_free_id(idev->iommufd, hwpt->hwpt_id);
+}
+
+static VTDS2Hwpt *vtd_ioas_container_get_s2_hwpt(VTDIOASContainer *container,
+ uint32_t hwpt_id)
+{
+ VTDS2Hwpt *s2_hwpt;
+
+ QLIST_FOREACH(s2_hwpt, &container->s2_hwpt_list, next) {
+ if (s2_hwpt->hwpt_id == hwpt_id) {
+ return s2_hwpt;
+ }
+ }
+
+ s2_hwpt = g_malloc0(sizeof(*s2_hwpt));
+
+ s2_hwpt->hwpt_id = hwpt_id;
+ s2_hwpt->container = container;
+ QLIST_INSERT_HEAD(&container->s2_hwpt_list, s2_hwpt, next);
+
+ return s2_hwpt;
+}
+
+static void vtd_ioas_container_put_s2_hwpt(VTDS2Hwpt *s2_hwpt)
+{
+ VTDIOASContainer *container = s2_hwpt->container;
+
+ if (s2_hwpt->users) {
+ return;
+ }
+
+ QLIST_REMOVE(s2_hwpt, next);
+ iommufd_backend_free_id(container->iommufd, s2_hwpt->hwpt_id);
+ g_free(s2_hwpt);
+}
+
+static void vtd_ioas_container_destroy(VTDIOASContainer *container)
+{
+ if (!QLIST_EMPTY(&container->s2_hwpt_list)) {
+ return;
+ }
+
+ QLIST_REMOVE(container, next);
+ memory_listener_unregister(&container->listener);
+ iommufd_backend_free_id(container->iommufd, container->ioas_id);
+ g_free(container);
+}
+
+static int vtd_device_attach_hwpt(VTDIOMMUFDDevice *vtd_idev,
+ uint32_t rid_pasid, VTDPASIDEntry *pe,
+ VTDS2Hwpt *s2_hwpt, VTDHwpt *hwpt,
+ Error **errp)
+{
+ IOMMUFDDevice *idev = vtd_idev->idev;
+ int ret;
+
+ if (vtd_pe_pgtt_is_flt(pe)) {
+ ret = vtd_create_s1_hwpt(vtd_idev->idev, s2_hwpt,
+ hwpt, pe, errp);
+ if (ret) {
+ return ret;
+ }
+ } else {
+ hwpt->hwpt_id = s2_hwpt->hwpt_id;
+ }
+
+ ret = iommufd_device_attach_hwpt(idev, hwpt->hwpt_id);
+ trace_vtd_device_attach_hwpt(idev->dev_id, rid_pasid, hwpt->hwpt_id, ret);
+ if (ret) {
+ if (vtd_pe_pgtt_is_flt(pe)) {
+ vtd_destroy_s1_hwpt(idev, hwpt);
+ }
+ hwpt->hwpt_id = 0;
+ error_setg(errp, "dev_id %d pasid %d failed to attach hwpt %d",
+ idev->dev_id, rid_pasid, hwpt->hwpt_id);
+ return ret;
+ }
+
+ s2_hwpt->users++;
+ hwpt->s2_hwpt = s2_hwpt;
+
+ return 0;
+}
+
+static void vtd_device_detach_hwpt(VTDIOMMUFDDevice *vtd_idev,
+ uint32_t rid_pasid, VTDPASIDEntry *pe,
+ VTDHwpt *hwpt, Error **errp)
+{
+ IOMMUFDDevice *idev = vtd_idev->idev;
+ int ret;
+
+ if (vtd_idev->iommu_state->dmar_enabled) {
+ ret = iommufd_device_detach_hwpt(idev);
+ trace_vtd_device_detach_hwpt(idev->dev_id, rid_pasid, ret);
+ } else {
+ ret = iommufd_device_attach_hwpt(idev, idev->ioas_id);
+ trace_vtd_device_reattach_def_ioas(idev->dev_id, rid_pasid,
+ idev->ioas_id, ret);
+ }
+
+ if (ret) {
+ error_setg(errp, "dev_id %d pasid %d failed to attach hwpt %d",
+ idev->dev_id, rid_pasid, hwpt->hwpt_id);
+ }
+
+ if (vtd_pe_pgtt_is_flt(pe)) {
+ vtd_destroy_s1_hwpt(idev, hwpt);
+ }
+
+ hwpt->s2_hwpt->users--;
+ hwpt->s2_hwpt = NULL;
+ hwpt->hwpt_id = 0;
+}
+
+static int vtd_device_attach_container(VTDIOMMUFDDevice *vtd_idev,
+ VTDIOASContainer *container,
+ uint32_t rid_pasid,
+ VTDPASIDEntry *pe,
+ VTDHwpt *hwpt,
+ Error **errp)
+{
+ IOMMUFDDevice *idev = vtd_idev->idev;
+ IOMMUFDBackend *iommufd = idev->iommufd;
+ VTDS2Hwpt *s2_hwpt;
+ uint32_t s2_hwpt_id;
+ Error *err = NULL;
+ int ret;
+
+ /* try to attach to an existing hwpt in this container */
+ QLIST_FOREACH(s2_hwpt, &container->s2_hwpt_list, next) {
+ ret = vtd_device_attach_hwpt(vtd_idev, rid_pasid, pe,
+ s2_hwpt, hwpt, &err);
+ if (ret) {
+ const char *msg = error_get_pretty(err);
+
+ trace_vtd_device_fail_attach_existing_hwpt(msg);
+ error_free(err);
+ err = NULL;
+ } else {
+ goto found_hwpt;
+ }
+ }
+
+ ret = iommufd_backend_alloc_hwpt(iommufd, idev->dev_id,
+ container->ioas_id,
+ IOMMU_HWPT_ALLOC_NEST_PARENT,
+ IOMMU_HWPT_DATA_NONE,
+ 0, NULL, &s2_hwpt_id);
+ if (ret) {
+ error_setg_errno(errp, errno, "error alloc parent hwpt");
+ return ret;
+ }
+
+ s2_hwpt = vtd_ioas_container_get_s2_hwpt(container, s2_hwpt_id);
+
+ /* Attach vtd device to a new allocated hwpt within iommufd */
+ ret = vtd_device_attach_hwpt(vtd_idev, rid_pasid, pe, s2_hwpt, hwpt, &err);
+ if (ret) {
+ goto err_attach_hwpt;
+ }
+
+found_hwpt:
+ trace_vtd_device_attach_container(iommufd->fd, idev->dev_id, rid_pasid,
+ container->ioas_id, hwpt->hwpt_id);
+ return 0;
+
+err_attach_hwpt:
+ vtd_ioas_container_put_s2_hwpt(s2_hwpt);
+ return ret;
+}
+
+static void vtd_device_detach_container(VTDIOMMUFDDevice *vtd_idev,
+ uint32_t rid_pasid,
+ VTDPASIDEntry *pe,
+ VTDHwpt *hwpt,
+ Error **errp)
+{
+ IOMMUFDDevice *idev = vtd_idev->idev;
+ IOMMUFDBackend *iommufd = idev->iommufd;
+ VTDS2Hwpt *s2_hwpt = hwpt->s2_hwpt;
+
+ trace_vtd_device_detach_container(iommufd->fd, idev->dev_id, rid_pasid);
+ vtd_device_detach_hwpt(vtd_idev, rid_pasid, pe, hwpt, errp);
+ vtd_ioas_container_put_s2_hwpt(s2_hwpt);
+}
+
+static int vtd_device_attach_iommufd(VTDIOMMUFDDevice *vtd_idev,
+ uint32_t rid_pasid,
+ VTDPASIDEntry *pe,
+ VTDHwpt *hwpt,
+ Error **errp)
+{
+ IntelIOMMUState *s = vtd_idev->iommu_state;
+ VTDIOASContainer *container;
+ IOMMUFDBackend *iommufd = vtd_idev->idev->iommufd;
+ Error *err = NULL;
+ uint32_t ioas_id;
+ int ret;
+
+ /* try to attach to an existing container in this space */
+ QLIST_FOREACH(container, &s->containers, next) {
+ if (container->iommufd != iommufd) {
+ continue;
+ }
+
+ if (vtd_device_attach_container(vtd_idev, container,
+ rid_pasid, pe, hwpt, &err)) {
+ const char *msg = error_get_pretty(err);
+
+ trace_vtd_device_fail_attach_existing_container(msg);
+ error_free(err);
+ err = NULL;
+ } else {
+ return 0;
+ }
+ }
+
+ /* Need to allocate a new dedicated container */
+ ret = iommufd_backend_alloc_ioas(iommufd, &ioas_id, errp);
+ if (ret < 0) {
+ return ret;
+ }
+
+ trace_vtd_device_alloc_ioas(iommufd->fd, ioas_id);
+
+ container = g_malloc0(sizeof(*container));
+ container->iommufd = iommufd;
+ container->ioas_id = ioas_id;
+ QLIST_INIT(&container->s2_hwpt_list);
+
+ if (vtd_device_attach_container(vtd_idev, container,
+ rid_pasid, pe, hwpt, errp)) {
+ goto err_attach_container;
+ }
+
+ container->listener = iommufd_s2domain_memory_listener;
+ memory_listener_register(&container->listener, &address_space_memory);
+
+ if (container->error) {
+ ret = -1;
+ error_propagate_prepend(errp, container->error,
+ "memory listener initialization failed: ");
+ goto err_listener_register;
+ }
+
+ QLIST_INSERT_HEAD(&s->containers, container, next);
+
+ return 0;
+
+err_listener_register:
+ vtd_device_detach_container(vtd_idev, rid_pasid, pe, hwpt, errp);
+err_attach_container:
+ iommufd_backend_free_id(iommufd, container->ioas_id);
+ g_free(container);
+ return ret;
+}
+
+static void vtd_device_detach_iommufd(VTDIOMMUFDDevice *vtd_idev,
+ uint32_t rid_pasid,
+ VTDPASIDEntry *pe,
+ VTDHwpt *hwpt,
+ Error **errp)
+{
+ VTDIOASContainer *container = hwpt->s2_hwpt->container;
+
+ vtd_device_detach_container(vtd_idev, rid_pasid, pe, hwpt, errp);
+ vtd_ioas_container_destroy(container);
+}
+
+static int vtd_device_attach_pgtbl(VTDIOMMUFDDevice *vtd_idev,
+ VTDPASIDEntry *pe,
+ VTDPASIDAddressSpace *vtd_pasid_as,
+ uint32_t rid_pasid)
+{
+ /*
+ * If pe->gptt != FLT, should be go ahead to do bind as host only
+ * accepts guest FLT under nesting. If pe->pgtt==PT, should setup
+ * the pasid with GPA page table. Otherwise should return failure.
+ */
+ if (!vtd_pe_pgtt_is_flt(pe) && !vtd_pe_pgtt_is_pt(pe)) {
+ return -EINVAL;
+ }
+
+ /* Should fail if the FLPT base is 0 */
+ if (vtd_pe_pgtt_is_flt(pe) && !vtd_pe_get_flpt_base(pe)) {
+ return -EINVAL;
+ }
+
+ return vtd_device_attach_iommufd(vtd_idev, rid_pasid, pe,
+ &vtd_pasid_as->hwpt, &error_abort);
+}
+
+static int vtd_device_detach_pgtbl(VTDIOMMUFDDevice *vtd_idev,
+ VTDPASIDAddressSpace *vtd_pasid_as,
+ uint32_t rid_pasid)
+{
+ VTDPASIDEntry *cached_pe = vtd_pasid_as->pasid_cache_entry.cache_filled ?
+ &vtd_pasid_as->pasid_cache_entry.pasid_entry : NULL;
+
+ if (!cached_pe ||
+ (!vtd_pe_pgtt_is_flt(cached_pe) && !vtd_pe_pgtt_is_pt(cached_pe))) {
+ return 0;
+ }
+
+ vtd_device_detach_iommufd(vtd_idev, rid_pasid, cached_pe,
+ &vtd_pasid_as->hwpt, &error_abort);
+
+ return 0;
+}
+
+static int vtd_dev_get_rid2pasid(IntelIOMMUState *s, uint8_t bus_num,
+ uint8_t devfn, uint32_t *rid_pasid)
+{
+ VTDContextEntry ce;
+ int ret;
+
+ /*
+ * Currently, ECAP.RPS bit is likely to be reported as "Clear".
+ * And per VT-d 3.1 spec, it will use PASID #0 as RID2PASID when
+ * RPS bit is reported as "Clear".
+ */
+ if (likely(!(s->ecap & VTD_ECAP_RPS))) {
+ *rid_pasid = 0;
+ return 0;
+ }
+
+ /*
+ * In future, to improve performance, could try to fetch context
+ * entry from cache firstly.
+ */
+ ret = vtd_dev_to_context_entry(s, bus_num, devfn, &ce);
+ if (!ret) {
+ *rid_pasid = VTD_CE_GET_RID2PASID(&ce);
+ }
+
+ return ret;
+}
+
+/**
+ * Caller should hold iommu_lock.
+ */
+static int vtd_bind_guest_pasid(VTDPASIDAddressSpace *vtd_pasid_as,
+ VTDPASIDEntry *pe, VTDPASIDOp op)
+{
+ IntelIOMMUState *s = vtd_pasid_as->iommu_state;
+ VTDIOMMUFDDevice *vtd_idev;
+ uint32_t rid_pasid;
+ int devfn = vtd_pasid_as->devfn;
+ int ret = -EINVAL;
+ struct vtd_as_key key = {
+ .bus = vtd_pasid_as->bus,
+ .devfn = devfn,
+ };
+
+ vtd_idev = g_hash_table_lookup(s->vtd_iommufd_dev, &key);
+ if (!vtd_idev || !vtd_idev->idev) {
+ /* means no need to go further, e.g. for emulated devices */
+ return 0;
+ }
+
+ if (vtd_dev_get_rid2pasid(s, pci_bus_num(vtd_pasid_as->bus),
+ devfn, &rid_pasid)) {
+ error_report("Unable to get rid_pasid for devfn: %d!", devfn);
+ return ret;
+ }
+
+ if (vtd_pasid_as->pasid != rid_pasid) {
+ error_report("Non-rid_pasid %d not supported yet", vtd_pasid_as->pasid);
+ return ret;
+ }
+
+ switch (op) {
+ case VTD_PASID_UPDATE:
+ case VTD_PASID_BIND:
+ {
+ ret = vtd_device_attach_pgtbl(vtd_idev, pe, vtd_pasid_as, rid_pasid);
+ break;
+ }
+ case VTD_PASID_UNBIND:
+ {
+ ret = vtd_device_detach_pgtbl(vtd_idev, vtd_pasid_as, rid_pasid);
+ break;
+ }
+ default:
+ error_report_once("Unknown VTDPASIDOp!!!\n");
+ break;
+ }
+
+ return ret;
+}
+
/* Do a context-cache device-selective invalidation.
* @func_mask: FM field after shifting
*/
@@ -2717,22 +3284,30 @@ static bool vtd_pasid_entry_compare(VTDPASIDEntry *p1, VTDPASIDEntry *p2)
* This function fills in the pasid entry in &vtd_pasid_as. Caller
* of this function should hold iommu_lock.
*/
-static void vtd_fill_pe_in_cache(IntelIOMMUState *s,
- VTDPASIDAddressSpace *vtd_pasid_as,
- VTDPASIDEntry *pe)
+static int vtd_fill_pe_in_cache(IntelIOMMUState *s,
+ VTDPASIDAddressSpace *vtd_pasid_as,
+ VTDPASIDEntry *pe)
{
VTDPASIDCacheEntry *pc_entry = &vtd_pasid_as->pasid_cache_entry;
+ int ret;
- if (vtd_pasid_entry_compare(pe, &pc_entry->pasid_entry)) {
- /* No need to go further as cached pasid entry is latest */
- return;
+ if (pc_entry->cache_filled) {
+ if (vtd_pasid_entry_compare(pe, &pc_entry->pasid_entry)) {
+ /* No need to go further as cached pasid entry is latest */
+ return 0;
+ }
+ ret = vtd_bind_guest_pasid(vtd_pasid_as,
+ pe, VTD_PASID_UPDATE);
+ } else {
+ ret = vtd_bind_guest_pasid(vtd_pasid_as,
+ pe, VTD_PASID_BIND);
}
- pc_entry->pasid_entry = *pe;
- /*
- * TODO:
- * - send pasid bind to host for passthru devices
- */
+ if (!ret) {
+ pc_entry->pasid_entry = *pe;
+ pc_entry->cache_filled = true;
+ }
+ return ret;
}
/*
@@ -2795,7 +3370,11 @@ static gboolean vtd_flush_pasid(gpointer key, gpointer value,
goto remove;
}
- vtd_fill_pe_in_cache(s, vtd_pasid_as, &pe);
+ if (vtd_fill_pe_in_cache(s, vtd_pasid_as, &pe)) {
+ pasid_cache_info_set_error(pc_info);
+ return true;
+ }
+
/*
* TODO:
* - when pasid-base-iotlb(piotlb) infrastructure is ready,
@@ -2805,10 +3384,14 @@ static gboolean vtd_flush_pasid(gpointer key, gpointer value,
remove:
/*
* TODO:
- * - send pasid bind to host for passthru devices
* - when pasid-base-iotlb(piotlb) infrastructure is ready,
* should invalidate QEMU piotlb togehter with this change.
*/
+ if (vtd_bind_guest_pasid(vtd_pasid_as,
+ NULL, VTD_PASID_UNBIND)) {
+ pasid_cache_info_set_error(pc_info);
+ }
+
return true;
}
@@ -2854,6 +3437,22 @@ static VTDPASIDAddressSpace *vtd_add_find_pasid_as(IntelIOMMUState *s,
return vtd_pasid_as;
}
+/* Caller of this function should hold iommu_lock. */
+static void vtd_remove_pasid_as(VTDPASIDAddressSpace *vtd_pasid_as)
+{
+ IntelIOMMUState *s = vtd_pasid_as->iommu_state;
+ PCIBus *bus = vtd_pasid_as->bus;
+ struct pasid_key key;
+ int devfn = vtd_pasid_as->devfn;
+ uint32_t pasid = vtd_pasid_as->pasid;
+ uint16_t sid;
+
+ sid = PCI_BUILD_BDF(pci_bus_num(bus), devfn);
+ vtd_init_pasid_key(pasid, sid, &key);
+
+ g_hash_table_remove(s->vtd_pasid_as, &key);
+}
+
/* Caller of this function should hold iommu_lock. */
static void vtd_sm_pasid_table_walk_one(IntelIOMMUState *s,
dma_addr_t pt_base,
@@ -2884,7 +3483,10 @@ static void vtd_sm_pasid_table_walk_one(IntelIOMMUState *s,
pasid = pasid_next;
continue;
}
- vtd_fill_pe_in_cache(s, vtd_pasid_as, &pe);
+ if (vtd_fill_pe_in_cache(s, vtd_pasid_as, &pe)) {
+ vtd_remove_pasid_as(vtd_pasid_as);
+ pasid_cache_info_set_error(info);
+ }
}
pasid = pasid_next;
}
@@ -2991,6 +3593,9 @@ static void vtd_replay_guest_pasid_bindings(IntelIOMMUState *s,
walk_info.devfn = vtd_idev->devfn;
vtd_replay_pasid_bind_for_dev(s, start, end, &walk_info);
}
+ if (walk_info.error_happened) {
+ pasid_cache_info_set_error(pc_info);
+ }
}
/*
@@ -3060,7 +3665,7 @@ static void vtd_pasid_cache_sync(IntelIOMMUState *s,
/* Caller of this function should hold iommu_lock */
static void vtd_pasid_cache_reset(IntelIOMMUState *s)
{
- VTDPASIDCacheInfo pc_info;
+ VTDPASIDCacheInfo pc_info = { .error_happened = false, };
trace_vtd_pasid_cache_reset();
@@ -3082,9 +3687,9 @@ static void vtd_pasid_cache_reset(IntelIOMMUState *s)
static bool vtd_process_pasid_desc(IntelIOMMUState *s,
VTDInvDesc *inv_desc)
{
+ VTDPASIDCacheInfo pc_info = { .error_happened = false, };
uint16_t domain_id;
uint32_t pasid;
- VTDPASIDCacheInfo pc_info;
if ((inv_desc->val[0] & VTD_INV_DESC_PASIDC_RSVD_VAL0) ||
(inv_desc->val[1] & VTD_INV_DESC_PASIDC_RSVD_VAL1) ||
@@ -3125,7 +3730,7 @@ static bool vtd_process_pasid_desc(IntelIOMMUState *s,
}
vtd_pasid_cache_sync(s, &pc_info);
- return true;
+ return !pc_info.error_happened ? true : false;
}
static bool vtd_process_inv_iec_desc(IntelIOMMUState *s,
diff --git a/hw/i386/trace-events b/hw/i386/trace-events
index 91d6c400b4..17e7191696 100644
--- a/hw/i386/trace-events
+++ b/hw/i386/trace-events
@@ -72,6 +72,14 @@ vtd_frr_new(int index, uint64_t hi, uint64_t lo) "index %d high 0x%"PRIx64" low
vtd_warn_invalid_qi_tail(uint16_t tail) "tail 0x%"PRIx16
vtd_warn_ir_vector(uint16_t sid, int index, int vec, int target) "sid 0x%"PRIx16" index %d vec %d (should be: %d)"
vtd_warn_ir_trigger(uint16_t sid, int index, int trig, int target) "sid 0x%"PRIx16" index %d trigger %d (should be: %d)"
+vtd_device_attach_hwpt(uint32_t dev_id, uint32_t pasid, uint32_t hwpt_id, int ret) "dev_id %d pasid %d hwpt_id %d, ret: %d"
+vtd_device_detach_hwpt(uint32_t dev_id, uint32_t pasid, int ret) "dev_id %d pasid %d ret: %d"
+vtd_device_reattach_def_ioas(uint32_t dev_id, uint32_t pasid, uint32_t ioas_id, int ret) "dev_id %d pasid %d ioas_id %d, ret: %d"
+vtd_device_fail_attach_existing_hwpt(const char *msg) " %s"
+vtd_device_attach_container(int fd, uint32_t dev_id, uint32_t pasid, uint32_t ioas_id, uint32_t hwpt_id) "iommufd %d dev_id %d pasid %d ioas_id %d hwpt_id %d"
+vtd_device_detach_container(int fd, uint32_t dev_id, uint32_t pasid) "iommufd %d dev_id %d pasid %d"
+vtd_device_fail_attach_existing_container(const char *msg) " %s"
+vtd_device_alloc_ioas(int fd, uint32_t ioas_id) "iommufd %d ioas_id %d"
# amd_iommu.c
amdvi_evntlog_fail(uint64_t addr, uint32_t head) "error: fail to write at addr 0x%"PRIx64" + offset 0x%"PRIx32
--
2.34.1© 2016 - 2024 Red Hat, Inc.