[PATCH v2 08/23] xen/arm: Introduce xen_pfn_t for pfn and mfn types

Stefano Stabellini
2012-08-06T14:36:13Z

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@eu.citrix.com>
---
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 ab99270..f904dcc 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 a93db16..555f94d 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 486653f..0bea470 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 3871e47..42834a3 100644
--- a/include/xen/interface/xen.h
+++ b/include/xen/interface/xen.h
@@ -188,7 +188,7 @@ 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;
@@ -428,11 +428,11 @@ 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 4d58881..45c1aa1 100644
--- a/include/xen/privcmd.h
+++ b/include/xen/privcmd.h
@@ -37,8 +37,6 @@
#include <linux/compiler.h>
#include <xen/interface/xen.h>

-typedef unsigned long xen_pfn_t;
-
struct privcmd_hypercall {
__u64 op;
__u64 arg[5];
--
1.7.2.5