arm: xen: implement multicall hypercall support.
As part of this make the usual change to xen_ulong_t in place of unsigned long. This change has no impact on x86. The Linux definition of struct multicall_entry.result differs from the Xen definition, I think for good reasons, and used a long rather than an unsigned long. Therefore introduce a xen_long_t, which is a long on x86 architectures and a signed 64-bit integer on ARM. Use uint32_t nr_calls on x86 for consistency with the ARM definition. Build tested on amd64 and i386 builds. Runtime tested on ARM. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>
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David Vrabel

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@@ -343,7 +343,7 @@ HYPERVISOR_memory_op(unsigned int cmd, void *arg)
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}
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static inline int
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HYPERVISOR_multicall(void *call_list, int nr_calls)
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HYPERVISOR_multicall(void *call_list, uint32_t nr_calls)
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{
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return _hypercall2(int, multicall, call_list, nr_calls);
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}
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@@ -54,6 +54,9 @@ typedef unsigned long xen_pfn_t;
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#define PRI_xen_pfn "lx"
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typedef unsigned long xen_ulong_t;
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#define PRI_xen_ulong "lx"
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typedef long xen_long_t;
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#define PRI_xen_long "lx"
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/* Guest handles for primitive C types. */
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__DEFINE_GUEST_HANDLE(uchar, unsigned char);
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__DEFINE_GUEST_HANDLE(uint, unsigned int);
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