From: Eric Auger <eric.auger@redhat.com>
To: eric.auger.pro@gmail.com, eric.auger@redhat.com,
qemu-devel@nongnu.org, qemu-arm@nongnu.org,
peter.maydell@linaro.org, jean-philippe@linaro.org,
dgilbert@redhat.com, quintela@redhat.com, mst@redhat.com,
peterx@redhat.com
Cc: kevin.tian@intel.com, bharatb.linux@gmail.com, tnowicki@marvell.com
Subject: [PATCH v15 4/9] virtio-iommu: Implement map/unmap
Date: Sat, 8 Feb 2020 13:00:17 +0100 [thread overview]
Message-ID: <20200208120022.1920-5-eric.auger@redhat.com> (raw)
In-Reply-To: <20200208120022.1920-1-eric.auger@redhat.com>
This patch implements virtio_iommu_map/unmap.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
---
v11 -> v12:
- check unmanaged managed flags on map
- removed 2 qemu_log_mask in unmap()
- fix leak
v10 -> v11:
- revisit the implementation of unmap according to Peter's suggestion
- removed virt_addr and size from viommu_mapping struct
- use g_tree_lookup_extended()
- return VIRTIO_IOMMU_S_RANGE in case a mapping were
to be split on unmap (instead of INVAL)
v5 -> v6:
- use new v0.6 fields
- replace error_report by qemu_log_mask
v3 -> v4:
- implement unmap semantics as specified in v0.4
---
hw/virtio/trace-events | 1 +
hw/virtio/virtio-iommu.c | 63 ++++++++++++++++++++++++++++++++++++++--
2 files changed, 62 insertions(+), 2 deletions(-)
diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events
index 15595f8cd7..22162d6583 100644
--- a/hw/virtio/trace-events
+++ b/hw/virtio/trace-events
@@ -64,6 +64,7 @@ virtio_iommu_attach(uint32_t domain_id, uint32_t ep_id) "domain=%d endpoint=%d"
virtio_iommu_detach(uint32_t domain_id, uint32_t ep_id) "domain=%d endpoint=%d"
virtio_iommu_map(uint32_t domain_id, uint64_t virt_start, uint64_t virt_end, uint64_t phys_start, uint32_t flags) "domain=%d virt_start=0x%"PRIx64" virt_end=0x%"PRIx64 " phys_start=0x%"PRIx64" flags=%d"
virtio_iommu_unmap(uint32_t domain_id, uint64_t virt_start, uint64_t virt_end) "domain=%d virt_start=0x%"PRIx64" virt_end=0x%"PRIx64
+virtio_iommu_unmap_done(uint32_t domain_id, uint64_t virt_start, uint64_t virt_end) "domain=%d virt_start=0x%"PRIx64" virt_end=0x%"PRIx64
virtio_iommu_translate(const char *name, uint32_t rid, uint64_t iova, int flag) "mr=%s rid=%d addr=0x%"PRIx64" flag=%d"
virtio_iommu_init_iommu_mr(char *iommu_mr) "init %s"
virtio_iommu_get_endpoint(uint32_t ep_id) "Alloc endpoint=%d"
diff --git a/hw/virtio/virtio-iommu.c b/hw/virtio/virtio-iommu.c
index d9fe83f530..844d34c270 100644
--- a/hw/virtio/virtio-iommu.c
+++ b/hw/virtio/virtio-iommu.c
@@ -18,6 +18,7 @@
*/
#include "qemu/osdep.h"
+#include "qemu/log.h"
#include "qemu/iov.h"
#include "qemu-common.h"
#include "hw/qdev-properties.h"
@@ -55,6 +56,11 @@ typedef struct VirtIOIOMMUInterval {
uint64_t high;
} VirtIOIOMMUInterval;
+typedef struct VirtIOIOMMUMapping {
+ uint64_t phys_addr;
+ uint32_t flags;
+} VirtIOIOMMUMapping;
+
static inline uint16_t virtio_iommu_get_bdf(IOMMUDevice *dev)
{
return PCI_BUILD_BDF(pci_bus_num(dev->bus), dev->devfn);
@@ -301,10 +307,39 @@ static int virtio_iommu_map(VirtIOIOMMU *s,
uint64_t virt_start = le64_to_cpu(req->virt_start);
uint64_t virt_end = le64_to_cpu(req->virt_end);
uint32_t flags = le32_to_cpu(req->flags);
+ VirtIOIOMMUDomain *domain;
+ VirtIOIOMMUInterval *interval;
+ VirtIOIOMMUMapping *mapping;
+
+ if (flags & ~VIRTIO_IOMMU_MAP_F_MASK) {
+ return VIRTIO_IOMMU_S_INVAL;
+ }
+
+ domain = g_tree_lookup(s->domains, GUINT_TO_POINTER(domain_id));
+ if (!domain) {
+ return VIRTIO_IOMMU_S_NOENT;
+ }
+
+ interval = g_malloc0(sizeof(*interval));
+
+ interval->low = virt_start;
+ interval->high = virt_end;
+
+ mapping = g_tree_lookup(domain->mappings, (gpointer)interval);
+ if (mapping) {
+ g_free(interval);
+ return VIRTIO_IOMMU_S_INVAL;
+ }
trace_virtio_iommu_map(domain_id, virt_start, virt_end, phys_start, flags);
- return VIRTIO_IOMMU_S_UNSUPP;
+ mapping = g_malloc0(sizeof(*mapping));
+ mapping->phys_addr = phys_start;
+ mapping->flags = flags;
+
+ g_tree_insert(domain->mappings, interval, mapping);
+
+ return VIRTIO_IOMMU_S_OK;
}
static int virtio_iommu_unmap(VirtIOIOMMU *s,
@@ -313,10 +348,34 @@ static int virtio_iommu_unmap(VirtIOIOMMU *s,
uint32_t domain_id = le32_to_cpu(req->domain);
uint64_t virt_start = le64_to_cpu(req->virt_start);
uint64_t virt_end = le64_to_cpu(req->virt_end);
+ VirtIOIOMMUMapping *iter_val;
+ VirtIOIOMMUInterval interval, *iter_key;
+ VirtIOIOMMUDomain *domain;
+ int ret = VIRTIO_IOMMU_S_OK;
trace_virtio_iommu_unmap(domain_id, virt_start, virt_end);
- return VIRTIO_IOMMU_S_UNSUPP;
+ domain = g_tree_lookup(s->domains, GUINT_TO_POINTER(domain_id));
+ if (!domain) {
+ return VIRTIO_IOMMU_S_NOENT;
+ }
+ interval.low = virt_start;
+ interval.high = virt_end;
+
+ while (g_tree_lookup_extended(domain->mappings, &interval,
+ (void **)&iter_key, (void**)&iter_val)) {
+ uint64_t current_low = iter_key->low;
+ uint64_t current_high = iter_key->high;
+
+ if (interval.low <= current_low && interval.high >= current_high) {
+ g_tree_remove(domain->mappings, iter_key);
+ trace_virtio_iommu_unmap_done(domain_id, current_low, current_high);
+ } else {
+ ret = VIRTIO_IOMMU_S_RANGE;
+ break;
+ }
+ }
+ return ret;
}
static int virtio_iommu_iov_to_req(struct iovec *iov,
--
2.20.1
next prev parent reply other threads:[~2020-02-08 12:04 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-08 12:00 [PATCH v15 0/9] VIRTIO-IOMMU device Eric Auger
2020-02-08 12:00 ` [PATCH v15 1/9] virtio-iommu: Add skeleton Eric Auger
2020-02-08 12:00 ` [PATCH v15 2/9] virtio-iommu: Decode the command payload Eric Auger
2020-02-08 12:00 ` [PATCH v15 3/9] virtio-iommu: Implement attach/detach command Eric Auger
2020-02-08 13:41 ` Peter Xu
2020-02-08 14:00 ` Auger Eric
2020-02-08 12:00 ` Eric Auger [this message]
2020-02-08 12:00 ` [PATCH v15 5/9] virtio-iommu: Implement translate Eric Auger
2020-02-08 12:00 ` [PATCH v15 6/9] virtio-iommu: Implement fault reporting Eric Auger
2020-02-08 12:00 ` [PATCH v15 7/9] virtio-iommu-pci: Add virtio iommu pci support Eric Auger
2020-02-08 12:00 ` [PATCH v15 8/9] hw/arm/virt: Add the virtio-iommu device tree mappings Eric Auger
2020-02-11 15:00 ` Peter Maydell
2020-02-11 17:31 ` Auger Eric
2020-02-13 13:45 ` Auger Eric
2020-02-08 12:00 ` [PATCH v15 9/9] virtio-iommu: Support migration Eric Auger
2020-02-10 16:45 ` Juan Quintela
2020-02-11 13:56 ` [PATCH v15 0/9] VIRTIO-IOMMU device Michael S. Tsirkin
2020-02-11 15:02 ` Peter Maydell
2020-02-11 16:30 ` Michael S. Tsirkin
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