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[Qemu-ppc] [PATCH qemu v16 12/19] spapr_pci: Reset DMA config on PHB res
From: |
Alexey Kardashevskiy |
Subject: |
[Qemu-ppc] [PATCH qemu v16 12/19] spapr_pci: Reset DMA config on PHB reset |
Date: |
Wed, 4 May 2016 16:52:24 +1000 |
LoPAPR dictates that during system reset all DMA windows must be removed
and the default DMA32 window must be created so does the patch.
At the moment there is just one window supported so no change in
behaviour is expected.
Signed-off-by: Alexey Kardashevskiy <address@hidden>
Reviewed-by: David Gibson <address@hidden>
---
hw/ppc/spapr_iommu.c | 2 +-
hw/ppc/spapr_pci.c | 17 +++++++++++------
include/hw/ppc/spapr.h | 1 +
3 files changed, 13 insertions(+), 7 deletions(-)
diff --git a/hw/ppc/spapr_iommu.c b/hw/ppc/spapr_iommu.c
index 740836f..5ce2f5e 100644
--- a/hw/ppc/spapr_iommu.c
+++ b/hw/ppc/spapr_iommu.c
@@ -358,7 +358,7 @@ static void spapr_tce_table_do_disable(sPAPRTCETable *tcet)
tcet->nb_table = 0;
}
-static void spapr_tce_table_disable(sPAPRTCETable *tcet)
+void spapr_tce_table_disable(sPAPRTCETable *tcet)
{
if (!tcet->enabled) {
error_report("Warning: trying to disable already disabled TCE table");
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index e1b196d..aa9201b 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -1311,7 +1311,6 @@ static void spapr_phb_realize(DeviceState *dev, Error
**errp)
PCIBus *bus;
uint64_t msi_window_size = 4096;
sPAPRTCETable *tcet;
- uint32_t nb_table;
if (sphb->index != (uint32_t)-1) {
hwaddr windows_base;
@@ -1463,7 +1462,6 @@ static void spapr_phb_realize(DeviceState *dev, Error
**errp)
}
}
- nb_table = sphb->dma_win_size >> SPAPR_TCE_PAGE_SHIFT;
tcet = spapr_tce_new_table(DEVICE(sphb), sphb->dma_liobn);
if (!tcet) {
error_setg(errp, "Unable to create TCE table for %s",
@@ -1474,10 +1472,6 @@ static void spapr_phb_realize(DeviceState *dev, Error
**errp)
memory_region_add_subregion_overlap(&sphb->iommu_root, 0,
spapr_tce_get_iommu(tcet), 0);
- /* Register default 32bit DMA window */
- spapr_tce_table_enable(tcet, SPAPR_TCE_PAGE_SHIFT, sphb->dma_win_addr,
- nb_table);
-
sphb->msi = g_hash_table_new_full(g_int_hash, g_int_equal, g_free, g_free);
}
@@ -1494,6 +1488,17 @@ static int spapr_phb_children_reset(Object *child, void
*opaque)
static void spapr_phb_reset(DeviceState *qdev)
{
+ sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(qdev);
+ sPAPRTCETable *tcet = spapr_tce_find_by_liobn(sphb->dma_liobn);
+
+ if (tcet && tcet->enabled) {
+ spapr_tce_table_disable(tcet);
+ }
+
+ /* Register default 32bit DMA window */
+ spapr_tce_table_enable(tcet, SPAPR_TCE_PAGE_SHIFT, sphb->dma_win_addr,
+ sphb->dma_win_size >> SPAPR_TCE_PAGE_SHIFT);
+
/* Reset the IOMMU state */
object_child_foreach(OBJECT(qdev), spapr_phb_children_reset, NULL);
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index 2026c69..f0cfd58 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -568,6 +568,7 @@ sPAPRTCETable *spapr_tce_new_table(DeviceState *owner,
uint32_t liobn);
void spapr_tce_table_enable(sPAPRTCETable *tcet,
uint32_t page_shift, uint64_t bus_offset,
uint32_t nb_table);
+void spapr_tce_table_disable(sPAPRTCETable *tcet);
void spapr_tce_set_need_vfio(sPAPRTCETable *tcet, bool need_vfio);
MemoryRegion *spapr_tce_get_iommu(sPAPRTCETable *tcet);
--
2.5.0.rc3
- [Qemu-ppc] [PATCH qemu v16 00/19] spapr: vfio: Enable Dynamic DMA windows (DDW), Alexey Kardashevskiy, 2016/05/04
- [Qemu-ppc] [PATCH qemu v16 10/19] spapr_iommu: Migrate full state, Alexey Kardashevskiy, 2016/05/04
- [Qemu-ppc] [PATCH qemu v16 16/19] vfio: Add host side DMA window capabilities, Alexey Kardashevskiy, 2016/05/04
- [Qemu-ppc] [PATCH qemu v16 05/19] vfio: Check that IOMMU MR translates to system address space, Alexey Kardashevskiy, 2016/05/04
- [Qemu-ppc] [PATCH qemu v16 12/19] spapr_pci: Reset DMA config on PHB reset,
Alexey Kardashevskiy <=
- [Qemu-ppc] [PATCH qemu v16 09/19] spapr_iommu: Finish renaming vfio_accel to need_vfio, Alexey Kardashevskiy, 2016/05/04
- [Qemu-ppc] [PATCH qemu v16 17/19] spapr_iommu, vfio, memory: Notify IOMMU about starting/stopping being used by VFIO, Alexey Kardashevskiy, 2016/05/04
- Re: [Qemu-ppc] [PATCH qemu v16 17/19] spapr_iommu, vfio, memory: Notify IOMMU about starting/stopping being used by VFIO, Alex Williamson, 2016/05/13
- Re: [Qemu-ppc] [PATCH qemu v16 17/19] spapr_iommu, vfio, memory: Notify IOMMU about starting/stopping being used by VFIO, Alexey Kardashevskiy, 2016/05/16
- Re: [Qemu-ppc] [PATCH qemu v16 17/19] spapr_iommu, vfio, memory: Notify IOMMU about starting/stopping being used by VFIO, Alex Williamson, 2016/05/16
- [Qemu-ppc] [RFC PATCH qemu] spapr_iommu, vfio, memory: Notify IOMMU about starting/stopping listening, Alexey Kardashevskiy, 2016/05/20
- Re: [Qemu-ppc] [RFC PATCH qemu] spapr_iommu, vfio, memory: Notify IOMMU about starting/stopping listening, Alex Williamson, 2016/05/20
- Re: [Qemu-ppc] [RFC PATCH qemu] spapr_iommu, vfio, memory: Notify IOMMU about starting/stopping listening, David Gibson, 2016/05/26
[Qemu-ppc] [PATCH qemu v16 08/19] spapr_iommu: Introduce "enabled" state for TCE table, Alexey Kardashevskiy, 2016/05/04