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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
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4
include/hw/ppc/spapr_vio.h
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@ -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 */