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[Xen-devel] [PATCH v4 08/24] xen/arm: Introduce xen_pfn_t for pfn and mfn types



All the original Xen headers have xen_pfn_t as mfn and pfn type, however
when they have been imported in Linux, xen_pfn_t has been replaced with
unsigned long. That might work for x86 and ia64 but it does not for arm.
Bring back xen_pfn_t and let each architecture define xen_pfn_t as they
see fit.

Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
---
 arch/arm/include/asm/xen/interface.h  |    4 ++++
 arch/ia64/include/asm/xen/interface.h |    5 ++++-
 arch/x86/include/asm/xen/interface.h  |    5 +++++
 include/xen/interface/grant_table.h   |    4 ++--
 include/xen/interface/memory.h        |    6 +++---
 include/xen/interface/platform.h      |    4 ++--
 include/xen/interface/xen.h           |    6 +++---
 include/xen/privcmd.h                 |    2 --
 8 files changed, 23 insertions(+), 13 deletions(-)

diff --git a/arch/arm/include/asm/xen/interface.h 
b/arch/arm/include/asm/xen/interface.h
index 9e0ec5a..74c72b5 100644
--- a/arch/arm/include/asm/xen/interface.h
+++ b/arch/arm/include/asm/xen/interface.h
@@ -25,6 +25,9 @@
        } while (0)
 
 #ifndef __ASSEMBLY__
+/* Explicitly size integers that represent pfns in the interface with
+ * Xen so that we can have one ABI that works for 32 and 64 bit guests. */
+typedef uint64_t xen_pfn_t;
 /* Guest handles for primitive C types. */
 __DEFINE_GUEST_HANDLE(uchar, unsigned char);
 __DEFINE_GUEST_HANDLE(uint,  unsigned int);
@@ -35,6 +38,7 @@ DEFINE_GUEST_HANDLE(long);
 DEFINE_GUEST_HANDLE(void);
 DEFINE_GUEST_HANDLE(uint64_t);
 DEFINE_GUEST_HANDLE(uint32_t);
+DEFINE_GUEST_HANDLE(xen_pfn_t);
 
 /* Maximum number of virtual CPUs in multi-processor guests. */
 #define MAX_VIRT_CPUS 1
diff --git a/arch/ia64/include/asm/xen/interface.h 
b/arch/ia64/include/asm/xen/interface.h
index 09d5f7f..686464e 100644
--- a/arch/ia64/include/asm/xen/interface.h
+++ b/arch/ia64/include/asm/xen/interface.h
@@ -67,6 +67,10 @@
 #define set_xen_guest_handle(hnd, val) do { (hnd).p = val; } while (0)
 
 #ifndef __ASSEMBLY__
+/* Explicitly size integers that represent pfns in the public interface
+ * with Xen so that we could have one ABI that works for 32 and 64 bit
+ * guests. */
+typedef unsigned long xen_pfn_t;
 /* Guest handles for primitive C types. */
 __DEFINE_GUEST_HANDLE(uchar, unsigned char);
 __DEFINE_GUEST_HANDLE(uint, unsigned int);
@@ -79,7 +83,6 @@ DEFINE_GUEST_HANDLE(void);
 DEFINE_GUEST_HANDLE(uint64_t);
 DEFINE_GUEST_HANDLE(uint32_t);
 
-typedef unsigned long xen_pfn_t;
 DEFINE_GUEST_HANDLE(xen_pfn_t);
 #define PRI_xen_pfn    "lx"
 #endif
diff --git a/arch/x86/include/asm/xen/interface.h 
b/arch/x86/include/asm/xen/interface.h
index cbf0c9d..2289075 100644
--- a/arch/x86/include/asm/xen/interface.h
+++ b/arch/x86/include/asm/xen/interface.h
@@ -47,6 +47,10 @@
 #endif
 
 #ifndef __ASSEMBLY__
+/* Explicitly size integers that represent pfns in the public interface
+ * with Xen so that on ARM we can have one ABI that works for 32 and 64
+ * bit guests. */
+typedef unsigned long xen_pfn_t;
 /* Guest handles for primitive C types. */
 __DEFINE_GUEST_HANDLE(uchar, unsigned char);
 __DEFINE_GUEST_HANDLE(uint,  unsigned int);
@@ -57,6 +61,7 @@ DEFINE_GUEST_HANDLE(long);
 DEFINE_GUEST_HANDLE(void);
 DEFINE_GUEST_HANDLE(uint64_t);
 DEFINE_GUEST_HANDLE(uint32_t);
+DEFINE_GUEST_HANDLE(xen_pfn_t);
 #endif
 
 #ifndef HYPERVISOR_VIRT_START
diff --git a/include/xen/interface/grant_table.h 
b/include/xen/interface/grant_table.h
index a17d844..7da811b 100644
--- a/include/xen/interface/grant_table.h
+++ b/include/xen/interface/grant_table.h
@@ -338,7 +338,7 @@ DEFINE_GUEST_HANDLE_STRUCT(gnttab_dump_table);
 #define GNTTABOP_transfer                4
 struct gnttab_transfer {
     /* IN parameters. */
-    unsigned long mfn;
+    xen_pfn_t mfn;
     domid_t       domid;
     grant_ref_t   ref;
     /* OUT parameters. */
@@ -375,7 +375,7 @@ struct gnttab_copy {
        struct {
                union {
                        grant_ref_t ref;
-                       unsigned long   gmfn;
+                       xen_pfn_t   gmfn;
                } u;
                domid_t  domid;
                uint16_t offset;
diff --git a/include/xen/interface/memory.h b/include/xen/interface/memory.h
index eac3ce1..abbbff0 100644
--- a/include/xen/interface/memory.h
+++ b/include/xen/interface/memory.h
@@ -31,7 +31,7 @@ struct xen_memory_reservation {
      *   OUT: GMFN bases of extents that were allocated
      *   (NB. This command also updates the mach_to_phys translation table)
      */
-    GUEST_HANDLE(ulong) extent_start;
+    GUEST_HANDLE(xen_pfn_t) extent_start;
 
     /* Number of extents, and size/alignment of each (2^extent_order pages). */
     unsigned long  nr_extents;
@@ -130,7 +130,7 @@ struct xen_machphys_mfn_list {
      * any large discontiguities in the machine address space, 2MB gaps in
      * the machphys table will be represented by an MFN base of zero.
      */
-    GUEST_HANDLE(ulong) extent_start;
+    GUEST_HANDLE(xen_pfn_t) extent_start;
 
     /*
      * Number of extents written to the above array. This will be smaller
@@ -172,7 +172,7 @@ struct xen_add_to_physmap {
     unsigned long idx;
 
     /* GPFN where the source mapping page should appear. */
-    unsigned long gpfn;
+    xen_pfn_t gpfn;
 };
 DEFINE_GUEST_HANDLE_STRUCT(xen_add_to_physmap);
 
diff --git a/include/xen/interface/platform.h b/include/xen/interface/platform.h
index 61fa661..a3275a8 100644
--- a/include/xen/interface/platform.h
+++ b/include/xen/interface/platform.h
@@ -54,7 +54,7 @@ DEFINE_GUEST_HANDLE_STRUCT(xenpf_settime_t);
 #define XENPF_add_memtype         31
 struct xenpf_add_memtype {
        /* IN variables. */
-       unsigned long mfn;
+       xen_pfn_t mfn;
        uint64_t nr_mfns;
        uint32_t type;
        /* OUT variables. */
@@ -84,7 +84,7 @@ struct xenpf_read_memtype {
        /* IN variables. */
        uint32_t reg;
        /* OUT variables. */
-       unsigned long mfn;
+       xen_pfn_t mfn;
        uint64_t nr_mfns;
        uint32_t type;
 };
diff --git a/include/xen/interface/xen.h b/include/xen/interface/xen.h
index 0801468..0054db1 100644
--- a/include/xen/interface/xen.h
+++ b/include/xen/interface/xen.h
@@ -190,7 +190,7 @@ struct mmuext_op {
        unsigned int cmd;
        union {
                /* [UN]PIN_TABLE, NEW_BASEPTR, NEW_USER_BASEPTR */
-               unsigned long mfn;
+               xen_pfn_t mfn;
                /* INVLPG_LOCAL, INVLPG_ALL, SET_LDT */
                unsigned long linear_addr;
        } arg1;
@@ -430,11 +430,11 @@ struct start_info {
        unsigned long nr_pages;     /* Total pages allocated to this domain.  */
        unsigned long shared_info;  /* MACHINE address of shared info struct. */
        uint32_t flags;             /* SIF_xxx flags.                         */
-       unsigned long store_mfn;    /* MACHINE page number of shared page.    */
+       xen_pfn_t store_mfn;        /* MACHINE page number of shared page.    */
        uint32_t store_evtchn;      /* Event channel for store communication. */
        union {
                struct {
-                       unsigned long mfn;  /* MACHINE page number of console 
page.   */
+                       xen_pfn_t mfn;      /* MACHINE page number of console 
page.   */
                        uint32_t  evtchn;   /* Event channel for console page.  
      */
                } domU;
                struct {
diff --git a/include/xen/privcmd.h b/include/xen/privcmd.h
index 17857fb..59f1bd8 100644
--- a/include/xen/privcmd.h
+++ b/include/xen/privcmd.h
@@ -36,8 +36,6 @@
 #include <linux/types.h>
 #include <linux/compiler.h>
 
-typedef unsigned long xen_pfn_t;
-
 struct privcmd_hypercall {
        __u64 op;
        __u64 arg[5];
-- 
1.7.2.5


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