[RFC PATCH 11/20] intel_iommu: provide iommu_ops->record_device

Liu, Yi L
2017-04-26T10:24:21Z

This patch provides iommu_ops->record_device implementation for
intel_iommu. It records the host sid in the IntelIOMMUNotifierNode for
further virtualization usage. e.g. guest sid -> host sid translation
during propagating 1st level cache invalidation from guest to host.

Signed-off-by: Liu, Yi L <yi.l.liu@linux.intel.com>
---
hw/i386/intel_iommu.c | 19 +++++++++++++++++++
include/hw/i386/intel_iommu.h | 1 +
2 files changed, 20 insertions(+)

diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c
index ba1e7eb..0c412d2 100644
--- a/hw/i386/intel_iommu.c
+++ b/hw/i386/intel_iommu.c
@@ -2407,6 +2407,24 @@ static void vtd_iommu_notify_flag_changed(MemoryRegion *iommu,
}
}

+static void vtd_iommu_record_device(MemoryRegion *iommu,
+ void *device_info)
+{
+ VTDAddressSpace *vtd_as = container_of(iommu, VTDAddressSpace, iommu);
+ IntelIOMMUState *s = vtd_as->iommu_state;
+ IntelIOMMUNotifierNode *node = NULL;
+ IntelIOMMUNotifierNode *next_node = NULL;
+ PCIHostDeviceAddress *host = (PCIHostDeviceAddress *) device_info;
+
+ QLIST_FOREACH_SAFE(node, &s->notifiers_list, next, next_node) {
+ if (node->vtd_as == vtd_as) {
+ node->host_sid = ((host->bus & 0xffUL) << 8)
+ | ((host->slot & 0x1f) << 3)
+ | (host->function & 0x7);
+ }
+ }
+}
+
static const VMStateDescription vtd_vmstate = {
.name = "iommu-intel",
.version_id = 1,
@@ -2940,6 +2958,7 @@ static void vtd_init(IntelIOMMUState *s)
s->iommu_ops.translate = vtd_iommu_translate;
s->iommu_ops.notify_flag_changed = vtd_iommu_notify_flag_changed;
s->iommu_ops.replay = vtd_iommu_replay;
+ s->iommu_ops.record_device = vtd_iommu_record_device;
s->root = 0;
s->root_extended = false;
s->dmar_enabled = false;
diff --git a/include/hw/i386/intel_iommu.h b/include/hw/i386/intel_iommu.h
index 8981615..a4ce5c3 100644
--- a/include/hw/i386/intel_iommu.h
+++ b/include/hw/i386/intel_iommu.h
@@ -252,6 +252,7 @@ struct VTD_MSIMessage {

struct IntelIOMMUNotifierNode {
VTDAddressSpace *vtd_as;
+ uint16_t host_sid;
QLIST_ENTRY(IntelIOMMUNotifierNode) next;
};

--
1.9.1