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KVM: PPC: Add support for 64bit TCE windows

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The existing KVM_CREATE_SPAPR_TCE only supports 32bit windows which is not
enough for directly mapped windows as the guest can get more than 4GB.

This adds KVM_CREATE_SPAPR_TCE_64 ioctl and advertises it
via KVM_CAP_SPAPR_TCE_64 capability. The table size is checked against
the locked memory limit.

Since 64bit windows are to support Dynamic DMA windows (DDW), let's add
@bus_offset and @page_shift which are also required by DDW.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Alexey Kardashevskiy
2016-03-01 17:54:40 +11:00
committed by Paul Mackerras
parent 14f853f1b2
commit 58ded4201f
6 changed files with 75 additions and 5 deletions
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9
arch/powerpc/include/uapi/asm/kvm.h
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@@ -333,6 +333,15 @@ struct kvm_create_spapr_tce {
__u32 window_size;
};
/* for KVM_CAP_SPAPR_TCE_64 */
struct kvm_create_spapr_tce_64 {
__u64 liobn;
__u32 page_shift;
__u32 flags;
__u64 offset; /* in pages */
__u64 size; /* in pages */
};
/* for KVM_ALLOCATE_RMA */
struct kvm_allocate_rma {
__u64 rma_size;