[XEN] interfaces: Remove explicit alignment/padding from domctl/sysctl hypercalls.

Generation of 32-on-64 compat shims is being semi-automated for all
other hypercalls. It seems sensible to teat all hypercalls uniformly
and do the same for the control-stack management interfaces too.

Signed-off-by: Keir Fraser <keir@xensource.com>

xen/include/public/arch-ia64.h

@@ -18,15 +18,12 @@
 
 #define DEFINE_XEN_GUEST_HANDLE(name)   __DEFINE_XEN_GUEST_HANDLE(name, name)
 #define XEN_GUEST_HANDLE(name)          __guest_handle_ ## name
-#define XEN_GUEST_HANDLE_64(name)       __guest_handle_ ## name
 #define set_xen_guest_handle(hnd, val)  do { (hnd).p = val; } while (0)
 #ifdef __XEN_TOOLS__
 #define get_xen_guest_handle(val, hnd)  do { val = (hnd).p; } while (0)
 #endif
 
 #ifndef __ASSEMBLY__
-typedef uint64_t uint64_aligned_t;
-
 /* Guest handles for primitive C types. */
 __DEFINE_XEN_GUEST_HANDLE(uchar, unsigned char);
 __DEFINE_XEN_GUEST_HANDLE(uint,  unsigned int);

xen/include/public/arch-powerpc.h

@@ -29,7 +29,6 @@
 
 #define DEFINE_XEN_GUEST_HANDLE(name) __DEFINE_XEN_GUEST_HANDLE(name, name)
 #define XEN_GUEST_HANDLE(name)        __guest_handle_ ## name
-#define XEN_GUEST_HANDLE_64(name)     __guest_handle_ ## name
 #define set_xen_guest_handle(hnd, val) \
     do { \
         if (sizeof ((hnd).__pad)) \
@@ -42,8 +41,6 @@
 #endif
 
 #ifndef __ASSEMBLY__
-typedef uint64_t uint64_aligned_t;
-
 /* Guest handles for primitive C types. */
 __DEFINE_XEN_GUEST_HANDLE(uchar, unsigned char);
 __DEFINE_XEN_GUEST_HANDLE(uint,  unsigned int);

xen/include/public/arch-x86_32.h

@@ -28,14 +28,7 @@
 #endif
 
 /* Structural guest handles introduced in 0x00030201. */
-#if (defined(__XEN__) || defined(__XEN_TOOLS__)) && !defined(__ASSEMBLY__)
-typedef uint64_t __attribute__((aligned(8))) uint64_aligned_t;
-#define __DEFINE_XEN_GUEST_HANDLE(name, type)                   \
-    typedef struct { type *p; }                                 \
-        __guest_handle_ ## name;                                \
-    typedef struct { union { type *p; uint64_aligned_t q; }; }  \
-        __guest_handle_64_ ## name
-#elif __XEN_INTERFACE_VERSION__ >= 0x00030201
+#if __XEN_INTERFACE_VERSION__ >= 0x00030201
 #define __DEFINE_XEN_GUEST_HANDLE(name, type) \
     typedef struct { type *p; } __guest_handle_ ## name
 #else
@@ -45,15 +38,9 @@ typedef uint64_t __attribute__((aligned(8))) uint64_aligned_t;
 
 #define DEFINE_XEN_GUEST_HANDLE(name)   __DEFINE_XEN_GUEST_HANDLE(name, name)
 #define XEN_GUEST_HANDLE(name)          __guest_handle_ ## name
-#define XEN_GUEST_HANDLE_64(name)       __guest_handle_64_ ## name
+#define set_xen_guest_handle(hnd, val)  do { (hnd).p = val; } while (0)
 #ifdef __XEN_TOOLS__
 #define get_xen_guest_handle(val, hnd)  do { val = (hnd).p; } while (0)
-#define set_xen_guest_handle(hnd, val)                      \
-    do { if ( sizeof(hnd) == 8 ) *(uint64_t *)&(hnd) = 0;   \
-         (hnd).p = val;                                     \
-    } while ( 0 )
-#else
-#define set_xen_guest_handle(hnd, val)  do { (hnd).p = val; } while (0)
 #endif
 
 #ifndef __ASSEMBLY__

xen/include/public/arch-x86_64.h

@@ -39,15 +39,12 @@
 
 #define DEFINE_XEN_GUEST_HANDLE(name)   __DEFINE_XEN_GUEST_HANDLE(name, name)
 #define XEN_GUEST_HANDLE(name)          __guest_handle_ ## name
-#define XEN_GUEST_HANDLE_64(name)       __guest_handle_ ## name
 #define set_xen_guest_handle(hnd, val)  do { (hnd).p = val; } while (0)
 #ifdef __XEN_TOOLS__
 #define get_xen_guest_handle(val, hnd)  do { val = (hnd).p; } while (0)
 #endif
 
 #ifndef __ASSEMBLY__
-typedef uint64_t uint64_aligned_t;
-
 /* Guest handles for primitive C types. */
 __DEFINE_XEN_GUEST_HANDLE(uchar, unsigned char);
 __DEFINE_XEN_GUEST_HANDLE(uint,  unsigned int);

xen/include/public/domctl.h

@@ -16,12 +16,10 @@
 
 #include "xen.h"
 
-#define XEN_DOMCTL_INTERFACE_VERSION 0x00000002
-
-#define uint64_t uint64_aligned_t
+#define XEN_DOMCTL_INTERFACE_VERSION 0x00000003
 
 struct xenctl_cpumap {
-    XEN_GUEST_HANDLE_64(uint8_t) bitmap;
+    XEN_GUEST_HANDLE(uint8_t) bitmap;
     uint32_t nr_cpus;
 };
 
@@ -76,7 +74,7 @@ struct xen_domctl_getmemlist {
     uint64_t max_pfns;
     /* Start index in guest's page list. */
     uint64_t start_pfn;
-    XEN_GUEST_HANDLE_64(xen_pfn_t) buffer;
+    XEN_GUEST_HANDLE(xen_pfn_t) buffer;
     /* OUT variables. */
     uint64_t num_pfns;
 };
@@ -113,7 +111,7 @@ struct xen_domctl_getpageframeinfo2 {
     /* IN variables. */
     uint64_t num;
     /* IN/OUT variables. */
-    XEN_GUEST_HANDLE_64(ulong) array;
+    XEN_GUEST_HANDLE(ulong) array;
 };
 typedef struct xen_domctl_getpageframeinfo2 xen_domctl_getpageframeinfo2_t;
 DEFINE_XEN_GUEST_HANDLE(xen_domctl_getpageframeinfo2_t);
@@ -187,7 +185,7 @@ struct xen_domctl_shadow_op {
     uint32_t       mb;       /* Shadow memory allocation in MB */
 
     /* OP_PEEK / OP_CLEAN */
-    XEN_GUEST_HANDLE_64(ulong) dirty_bitmap;
+    XEN_GUEST_HANDLE(ulong) dirty_bitmap;
     uint64_t       pages;    /* Size of buffer. Updated with actual size. */
     struct xen_domctl_shadow_op_stats stats;
 };
@@ -207,8 +205,8 @@ DEFINE_XEN_GUEST_HANDLE(xen_domctl_max_mem_t);
 #define XEN_DOMCTL_setvcpucontext    12
 #define XEN_DOMCTL_getvcpucontext    13
 struct xen_domctl_vcpucontext {
-    uint32_t              vcpu;                     /* IN */
-    XEN_GUEST_HANDLE_64(vcpu_guest_context_t) ctxt; /* IN/OUT */
+    uint32_t              vcpu;                  /* IN */
+    XEN_GUEST_HANDLE(vcpu_guest_context_t) ctxt; /* IN/OUT */
 };
 typedef struct xen_domctl_vcpucontext xen_domctl_vcpucontext_t;
 DEFINE_XEN_GUEST_HANDLE(xen_domctl_vcpucontext_t);
@@ -381,8 +379,6 @@ struct xen_domctl {
 typedef struct xen_domctl xen_domctl_t;
 DEFINE_XEN_GUEST_HANDLE(xen_domctl_t);
 
-#undef uint64_t
-
 #endif /* __XEN_PUBLIC_DOMCTL_H__ */
 
 /*

xen/include/public/sysctl.h

@@ -16,9 +16,7 @@
 #include "xen.h"
 #include "domctl.h"
 
-#define XEN_SYSCTL_INTERFACE_VERSION 0x00000001
-
-#define uint64_t uint64_aligned_t
+#define XEN_SYSCTL_INTERFACE_VERSION 0x00000002
 
 /*
  * Read console content from Xen buffer ring.
@@ -26,8 +24,8 @@
 #define XEN_SYSCTL_readconsole       1
 struct xen_sysctl_readconsole {
     /* IN variables. */
-    uint32_t clear;                   /* Non-zero -> clear after reading. */
-    XEN_GUEST_HANDLE_64(char) buffer; /* Buffer start */
+    uint32_t clear;                /* Non-zero -> clear after reading. */
+    XEN_GUEST_HANDLE(char) buffer; /* Buffer start */
     /* IN/OUT variables. */
     uint32_t count;            /* In: Buffer size;  Out: Used buffer size  */
 };
@@ -105,9 +103,9 @@ struct xen_sysctl_perfc_op {
     uint32_t       nr_counters;       /*  number of counters description  */
     uint32_t       nr_vals;			  /*  number of values  */
     /* counter information (or NULL) */
-    XEN_GUEST_HANDLE_64(xen_sysctl_perfc_desc_t) desc;
+    XEN_GUEST_HANDLE(xen_sysctl_perfc_desc_t) desc;
     /* counter values (or NULL) */
-    XEN_GUEST_HANDLE_64(xen_sysctl_perfc_val_t) val;
+    XEN_GUEST_HANDLE(xen_sysctl_perfc_val_t) val;
 };
 typedef struct xen_sysctl_perfc_op xen_sysctl_perfc_op_t;
 DEFINE_XEN_GUEST_HANDLE(xen_sysctl_perfc_op_t);
@@ -117,7 +115,7 @@ struct xen_sysctl_getdomaininfolist {
     /* IN variables. */
     domid_t               first_domain;
     uint32_t              max_domains;
-    XEN_GUEST_HANDLE_64(xen_domctl_getdomaininfo_t) buffer;
+    XEN_GUEST_HANDLE(xen_domctl_getdomaininfo_t) buffer;
     /* OUT variables. */
     uint32_t              num_domains;
 };
@@ -140,8 +138,6 @@ struct xen_sysctl {
 typedef struct xen_sysctl xen_sysctl_t;
 DEFINE_XEN_GUEST_HANDLE(xen_sysctl_t);
 
-#undef uint64_t
-
 #endif /* __XEN_PUBLIC_SYSCTL_H__ */
 
 /*