Modify memory_get_xlat_addr and vfio_get_xlat_addr to return the memory
region that the translated address is found in. This will be needed by
CPR in a subsequent patch to map blocks using IOMMU_IOAS_MAP_FILE.
Also return the xlat offset, so we can simplify the interface by removing
the out parameters that can be trivially derived from mr and xlat.
Signed-off-by: Steve Sistare <steven.sist...@oracle.com>
---
hw/vfio/common.c | 21 ++++++++++++++-------
hw/virtio/vhost-vdpa.c | 8 ++++++--
include/exec/memory.h | 6 +++---
system/memory.c | 19 ++++---------------
4 files changed, 27 insertions(+), 27 deletions(-)
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index c536698..3b0c520 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -246,14 +246,13 @@ static bool
vfio_listener_skipped_section(MemoryRegionSection *section)
}
/* Called with rcu_read_lock held. */
-static bool vfio_get_xlat_addr(IOMMUTLBEntry *iotlb, void **vaddr,
- ram_addr_t *ram_addr, bool *read_only,
- Error **errp)
+static bool vfio_get_xlat_addr(IOMMUTLBEntry *iotlb, MemoryRegion **mr_p,
+ hwaddr *xlat_p, Error **errp)
{
bool ret, mr_has_discard_manager;
- ret = memory_get_xlat_addr(iotlb, vaddr, ram_addr, read_only,
- &mr_has_discard_manager, errp);
+ ret = memory_get_xlat_addr(iotlb, &mr_has_discard_manager, mr_p, xlat_p,
+ errp);
if (ret && mr_has_discard_manager) {
/*
* Malicious VMs might trigger discarding of IOMMU-mapped memory. The
@@ -281,6 +280,8 @@ static void vfio_iommu_map_notify(IOMMUNotifier *n,
IOMMUTLBEntry *iotlb)
VFIOGuestIOMMU *giommu = container_of(n, VFIOGuestIOMMU, n);
VFIOContainerBase *bcontainer = giommu->bcontainer;
hwaddr iova = iotlb->iova + giommu->iommu_offset;
+ MemoryRegion *mr;
+ hwaddr xlat;
void *vaddr;
int ret;
Error *local_err = NULL;
@@ -300,10 +301,13 @@ static void vfio_iommu_map_notify(IOMMUNotifier *n,
IOMMUTLBEntry *iotlb)
if ((iotlb->perm & IOMMU_RW) != IOMMU_NONE) {
bool read_only;
- if (!vfio_get_xlat_addr(iotlb, &vaddr, NULL, &read_only, &local_err)) {
+ if (!vfio_get_xlat_addr(iotlb, &mr, &xlat, &local_err)) {
error_report_err(local_err);
goto out;
}
+ vaddr = memory_region_get_ram_ptr(mr) + xlat;
+ read_only = !(iotlb->perm & IOMMU_WO) || mr->readonly;
+
/*
* vaddr is only valid until rcu_read_unlock(). But after
* vfio_dma_map has set up the mapping the pages will be
@@ -1259,6 +1263,8 @@ static void vfio_iommu_map_dirty_notify(IOMMUNotifier *n,
IOMMUTLBEntry *iotlb)
ram_addr_t translated_addr;
Error *local_err = NULL;
int ret = -EINVAL;
+ MemoryRegion *mr;
+ ram_addr_t xlat;
trace_vfio_iommu_map_dirty_notify(iova, iova + iotlb->addr_mask);
@@ -1269,10 +1275,11 @@ static void vfio_iommu_map_dirty_notify(IOMMUNotifier
*n, IOMMUTLBEntry *iotlb)
}
rcu_read_lock();
- if (!vfio_get_xlat_addr(iotlb, NULL, &translated_addr, NULL, &local_err)) {
+ if (!vfio_get_xlat_addr(iotlb, &mr, &xlat, &local_err)) {
error_report_err(local_err);
goto out_unlock;
}
+ translated_addr = memory_region_get_ram_addr(mr) + xlat;
ret = vfio_get_dirty_bitmap(bcontainer, iova, iotlb->addr_mask + 1,
translated_addr, &local_err);
diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
index 3cdaa12..5dfe51e 100644
--- a/hw/virtio/vhost-vdpa.c
+++ b/hw/virtio/vhost-vdpa.c
@@ -209,6 +209,8 @@ static void vhost_vdpa_iommu_map_notify(IOMMUNotifier *n,
IOMMUTLBEntry *iotlb)
int ret;
Int128 llend;
Error *local_err = NULL;
+ MemoryRegion *mr;
+ hwaddr xlat;
if (iotlb->target_as != &address_space_memory) {
error_report("Wrong target AS \"%s\", only system memory is allowed",
@@ -228,11 +230,13 @@ static void vhost_vdpa_iommu_map_notify(IOMMUNotifier *n,
IOMMUTLBEntry *iotlb)
if ((iotlb->perm & IOMMU_RW) != IOMMU_NONE) {
bool read_only;
- if (!memory_get_xlat_addr(iotlb, &vaddr, NULL, &read_only, NULL,
- &local_err)) {
+ if (!memory_get_xlat_addr(iotlb, NULL, &mr, &xlat, &local_err)) {
error_report_err(local_err);
return;
}
+ vaddr = memory_region_get_ram_ptr(mr) + xlat;
+ read_only = !(iotlb->perm & IOMMU_WO) || mr->readonly;
+
ret = vhost_vdpa_dma_map(s, VHOST_VDPA_GUEST_PA_ASID, iova,
iotlb->addr_mask + 1, vaddr, read_only);
if (ret) {
diff --git a/include/exec/memory.h b/include/exec/memory.h
index ea5d33a..8590838 100644
--- a/include/exec/memory.h
+++ b/include/exec/memory.h
@@ -747,13 +747,13 @@ void
ram_discard_manager_unregister_listener(RamDiscardManager *rdm,
* @read_only: indicates if writes are allowed
* @mr_has_discard_manager: indicates memory is controlled by a
* RamDiscardManager
+ * @mr_p: return the MemoryRegion containing the @iotlb translated addr
* @errp: pointer to Error*, to store an error if it happens.
*
* Return: true on success, else false setting @errp with error.
*/
-bool memory_get_xlat_addr(IOMMUTLBEntry *iotlb, void **vaddr,
- ram_addr_t *ram_addr, bool *read_only,
- bool *mr_has_discard_manager, Error **errp);
+bool memory_get_xlat_addr(IOMMUTLBEntry *iotlb, bool *mr_has_discard_manager,
+ MemoryRegion **mr_p, hwaddr *xlat_p, Error **errp);
typedef struct CoalescedMemoryRange CoalescedMemoryRange;
typedef struct MemoryRegionIoeventfd MemoryRegionIoeventfd;
diff --git a/system/memory.c b/system/memory.c
index 4c82979..755eafe 100644
--- a/system/memory.c
+++ b/system/memory.c
@@ -2183,9 +2183,8 @@ void
ram_discard_manager_unregister_listener(RamDiscardManager *rdm,
}
/* Called with rcu_read_lock held. */
-bool memory_get_xlat_addr(IOMMUTLBEntry *iotlb, void **vaddr,
- ram_addr_t *ram_addr, bool *read_only,
- bool *mr_has_discard_manager, Error **errp)
+bool memory_get_xlat_addr(IOMMUTLBEntry *iotlb, bool *mr_has_discard_manager,
+ MemoryRegion **mr_p, hwaddr *xlat_p, Error **errp)
{
MemoryRegion *mr;
hwaddr xlat;
@@ -2238,18 +2237,8 @@ bool memory_get_xlat_addr(IOMMUTLBEntry *iotlb, void
**vaddr,
return false;
}
- if (vaddr) {
- *vaddr = memory_region_get_ram_ptr(mr) + xlat;
- }
-
- if (ram_addr) {
- *ram_addr = memory_region_get_ram_addr(mr) + xlat;
- }
-
- if (read_only) {
- *read_only = !writable || mr->readonly;
- }
-
+ *xlat_p = xlat;
+ *mr_p = mr;
return true;
}
--
1.8.3.1
