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spapr_vio/spapr_iommu: Move VIO bypass where it belongs

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Instead of tweaking a TCE table device by adding there a bypass flag,
let's add an alias to RAM and IOMMU memory region, and enable/disable
those according to the selected bypass mode.
This way IOMMU memory region can have size of the actual window rather
than ram_size which is essential for upcoming DDW support.

This moves bypass logic to VIO layer and keeps @bypass flag in TCE table
for migration compatibility only. This replaces spapr_tce_set_bypass()
calls with explicit assignment to avoid confusion as the function could
do something more that just syncing the @bypass flag.

This adds a pointer to VIO device into the sPAPRTCETable struct to provide
the sPAPRTCETable device a way to update bypass mode for the VIO device.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexey Kardashevskiy 2015-01-29 16:04:58 +11:00 • committed by Alexander Graf
parent 0048fa6c80
commit ee9a569ab8
4 changed files with 47 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

2
include/hw/ppc/spapr.h
View file

@ -463,6 +463,7 @@ struct sPAPRTCETable {
bool vfio_accel;
int fd;
MemoryRegion iommu;
struct VIOsPAPRDevice *vdev; /* for @bypass migration compatibility only */
QLIST_ENTRY(sPAPRTCETable) list;
};
@ -475,7 +476,6 @@ sPAPRTCETable *spapr_tce_new_table(DeviceState *owner, uint32_t liobn,
uint32_t nb_table,
bool vfio_accel);
MemoryRegion *spapr_tce_get_iommu(sPAPRTCETable *tcet);
void spapr_tce_set_bypass(sPAPRTCETable *tcet, bool bypass);
int spapr_dma_dt(void *fdt, int node_off, const char *propname,
uint32_t liobn, uint64_t window, uint32_t size);
int spapr_tcet_dma_dt(void *fdt, int node_off, const char *propname,

4
include/hw/ppc/spapr_vio.h
View file

@ -64,6 +64,8 @@ struct VIOsPAPRDevice {
target_ulong signal_state;
VIOsPAPR_CRQ crq;
AddressSpace as;
MemoryRegion mrroot;
MemoryRegion mrbypass;
sPAPRTCETable *tcet;
};
@ -139,4 +141,6 @@ extern const VMStateDescription vmstate_spapr_vio;
#define VMSTATE_SPAPR_VIO(_f, _s) \
VMSTATE_STRUCT(_f, _s, 0, vmstate_spapr_vio, VIOsPAPRDevice)
void spapr_vio_set_bypass(VIOsPAPRDevice *dev, bool bypass);
#endif /* _HW_SPAPR_VIO_H */