haraldwolff/qemu-patch-raspberry4
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virtio-gpu: add iommu support

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Switch from cpu_physical_memory_map to dma_memory_map,
so iommu mappings for virtio-gpu objects work properly.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-Id: <20180829122101.29852-3-kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2018-08-29 14:21:01 +02:00
parent 3bb68f798d
commit 8da132a56f
1 changed files with 14 additions and 11 deletions
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25
hw/display/virtio-gpu.c
View file

@ -17,6 +17,7 @@
#include "qemu/iov.h"
#include "ui/console.h"
#include "trace.h"
#include "sysemu/dma.h"
#include "hw/virtio/virtio.h"
#include "hw/virtio/virtio-gpu.h"
#include "hw/virtio/virtio-bus.h"
@ -726,7 +727,8 @@ int virtio_gpu_create_mapping_iov(VirtIOGPU *g,
uint32_t l = le32_to_cpu(ents[i].length);
hwaddr len = l;
(*iov)[i].iov_len = l;
(*iov)[i].iov_base = cpu_physical_memory_map(a, &len, 1);
(*iov)[i].iov_base = dma_memory_map(VIRTIO_DEVICE(g)->dma_as,
a, &len, DMA_DIRECTION_TO_DEVICE);
if (addr) {
(*addr)[i] = a;
}
@ -754,8 +756,10 @@ void virtio_gpu_cleanup_mapping_iov(VirtIOGPU *g,
int i;
for (i = 0; i < count; i++) {
cpu_physical_memory_unmap(iov[i].iov_base, iov[i].iov_len, 1,
iov[i].iov_len);
dma_memory_unmap(VIRTIO_DEVICE(g)->dma_as,
iov[i].iov_base, iov[i].iov_len,
DMA_DIRECTION_TO_DEVICE,
iov[i].iov_len);
}
g_free(iov);
}
@ -1147,13 +1151,17 @@ static int virtio_gpu_load(QEMUFile *f, void *opaque, size_t size,
for (i = 0; i < res->iov_cnt; i++) {
hwaddr len = res->iov[i].iov_len;
res->iov[i].iov_base =
cpu_physical_memory_map(res->addrs[i], &len, 1);
dma_memory_map(VIRTIO_DEVICE(g)->dma_as,
res->addrs[i], &len, DMA_DIRECTION_TO_DEVICE);
if (!res->iov[i].iov_base || len != res->iov[i].iov_len) {
/* Clean up the half-a-mapping we just created... */
if (res->iov[i].iov_base) {
cpu_physical_memory_unmap(res->iov[i].iov_base,
len, 0, 0);
dma_memory_unmap(VIRTIO_DEVICE(g)->dma_as,
res->iov[i].iov_base,
res->iov[i].iov_len,
DMA_DIRECTION_TO_DEVICE,
res->iov[i].iov_len);
}
/* ...and the mappings for previous loop iterations */
res->iov_cnt = i;
@ -1205,11 +1213,6 @@ static void virtio_gpu_device_realize(DeviceState *qdev, Error **errp)
Error *local_err = NULL;
int i;
if (virtio_host_has_feature(vdev, VIRTIO_F_IOMMU_PLATFORM)) {
error_setg(errp, "virtio-gpu does not support vIOMMU yet");
return;
}
if (g->conf.max_outputs > VIRTIO_GPU_MAX_SCANOUTS) {
error_setg(errp, "invalid max_outputs > %d", VIRTIO_GPU_MAX_SCANOUTS);
return;