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KVM: PPC: Add @page_shift to kvmppc_spapr_tce_table

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At the moment the kvmppc_spapr_tce_table struct can only describe
4GB windows and handle fixed size (4K) pages. Dynamic DMA windows
support more so these limits need to be extended.

This replaces window_size (in bytes, 4GB max) with page_shift (32bit)
and size (64bit, in pages).

This should cause no behavioural change as this is changing
the internal structures only - the user interface still only
allows one to create a 32-bit table with 4KiB pages at this stage.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Alexey Kardashevskiy
2016-03-01 17:54:38 +11:00
committed by Paul Mackerras
parent 01d01d6919
commit fe26e52712
3 changed files with 23 additions and 23 deletions
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3
arch/powerpc/include/asm/kvm_host.h
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@@ -182,8 +182,9 @@ struct kvmppc_spapr_tce_table {
struct list_head list;
struct kvm *kvm;
u64 liobn;
u32 window_size;
struct rcu_head rcu;
u32 page_shift;
u64 size; /* window size in pages */
struct page *pages[0];
};