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memory/iommu: Add get_attr()

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This adds get_attr() to IOMMUMemoryRegionClass, like
iommu_ops::domain_get_attr in the Linux kernel.

This defines the first attribute - IOMMU_ATTR_SPAPR_TCE_FD - which
will be used between the pSeries machine and VFIO-PCI.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Alexey Kardashevskiy 2018-02-06 11:08:24 -07:00 • committed by Alex Williamson
parent 20e0d439a6
commit f1334de60b
2 changed files with 35 additions and 0 deletions
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22
include/exec/memory.h
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@ -190,6 +190,10 @@ struct MemoryRegionOps {
const MemoryRegionMmio old_mmio;
};
enum IOMMUMemoryRegionAttr {
IOMMU_ATTR_SPAPR_TCE_FD
};
typedef struct IOMMUMemoryRegionClass {
/* private */
struct DeviceClass parent_class;
@ -210,6 +214,10 @@ typedef struct IOMMUMemoryRegionClass {
IOMMUNotifierFlag new_flags);
/* Set this up to provide customized IOMMU replay function */
void (*replay)(IOMMUMemoryRegion *iommu, IOMMUNotifier *notifier);
/* Get IOMMU misc attributes */
int (*get_attr)(IOMMUMemoryRegion *iommu, enum IOMMUMemoryRegionAttr,
void *data);
} IOMMUMemoryRegionClass;
typedef struct CoalescedMemoryRange CoalescedMemoryRange;
@ -926,6 +934,20 @@ void memory_region_iommu_replay_all(IOMMUMemoryRegion *iommu_mr);
void memory_region_unregister_iommu_notifier(MemoryRegion *mr,
IOMMUNotifier *n);
/**
* memory_region_iommu_get_attr: return an IOMMU attr if get_attr() is
* defined on the IOMMU.
*
* Returns 0 if succeded, error code otherwise.
*
* @iommu_mr: the memory region
* @attr: the requested attribute
* @data: a pointer to the requested attribute data
*/
int memory_region_iommu_get_attr(IOMMUMemoryRegion *iommu_mr,
enum IOMMUMemoryRegionAttr attr,
void *data);
/**
* memory_region_name: get a memory region's name
*