Re: [PATCH v4 09/24] xen/arm: Introduce xen_ulong_t for unsigned long

On Fri, Sep 14, 2012 at 12:13:11PM +0100, Stefano Stabellini wrote:

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

Also explicitly size pointers (__DEFINE_GUEST_HANDLE) to 64 bit.

Changes in v3:

• remove the incorrect changes to multicall_entry;
• remove the change to apic_physbase.

Signed-off-by: Stefano Stabellini stefano.stabellini@eu.citrix.com

Acked-by: Konrad Rzeszutek Wilk konrad.wilk@oracle.com for the generic parts; all other: Reviewed-by: Konrad Rzeszutek Wilk konrad.wilk@oracle.com

---

arch/arm/include/asm/xen/interface.h | 8 ++++++-- arch/ia64/include/asm/xen/interface.h | 1 + arch/x86/include/asm/xen/interface.h | 1 + include/xen/interface/memory.h | 12 ++++++------ include/xen/interface/physdev.h | 2 +- include/xen/interface/version.h | 2 +- 6 files changed, 16 insertions(+), 10 deletions(-)

diff --git a/arch/arm/include/asm/xen/interface.h b/arch/arm/include/asm/xen/interface.h index 74c72b5..ae05e56 100644 --- a/arch/arm/include/asm/xen/interface.h +++ b/arch/arm/include/asm/xen/interface.h @@ -9,8 +9,11 @@ #include <linux/types.h> +#define uint64_aligned_t uint64_t __attribute__((aligned(8)))

#define __DEFINE_GUEST_HANDLE(name, type) \

• typedef type * __guest_handle_ ## name

• typedef struct { union { type *p; uint64_aligned_t q; }; } \

•    __guest_handle_ ## name
  

#define DEFINE_GUEST_HANDLE_STRUCT(name) \ __DEFINE_GUEST_HANDLE(name, struct name) @@ -21,13 +24,14 @@ do { \ if (sizeof(hnd) == 8) \ *(uint64_t *)&(hnd) = 0; \

• (hnd) = val;				\
  

• (hnd).p = val;				\
  

  } 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; +typedef uint64_t xen_ulong_t; /* Guest handles for primitive C types. */ __DEFINE_GUEST_HANDLE(uchar, unsigned char); __DEFINE_GUEST_HANDLE(uint, unsigned int); diff --git a/arch/ia64/include/asm/xen/interface.h b/arch/ia64/include/asm/xen/interface.h index 686464e..7c83445 100644 --- a/arch/ia64/include/asm/xen/interface.h +++ b/arch/ia64/include/asm/xen/interface.h @@ -71,6 +71,7 @@

• with Xen so that we could have one ABI that works for 32 and 64 bit
• guests. */

typedef unsigned long xen_pfn_t; +typedef unsigned long xen_ulong_t; /* Guest handles for primitive C types. */ __DEFINE_GUEST_HANDLE(uchar, unsigned char); __DEFINE_GUEST_HANDLE(uint, unsigned int); diff --git a/arch/x86/include/asm/xen/interface.h b/arch/x86/include/asm/xen/interface.h index 2289075..25cc8df 100644 --- a/arch/x86/include/asm/xen/interface.h +++ b/arch/x86/include/asm/xen/interface.h @@ -51,6 +51,7 @@

• 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; +typedef unsigned long xen_ulong_t; /* Guest handles for primitive C types. */ __DEFINE_GUEST_HANDLE(uchar, unsigned char); __DEFINE_GUEST_HANDLE(uint, unsigned int); diff --git a/include/xen/interface/memory.h b/include/xen/interface/memory.h index abbbff0..b5c3098 100644 --- a/include/xen/interface/memory.h +++ b/include/xen/interface/memory.h @@ -34,7 +34,7 @@ struct xen_memory_reservation { GUEST_HANDLE(xen_pfn_t) extent_start; /* Number of extents, and size/alignment of each (2^extent_order pages). */

• unsigned long nr_extents;

• xen_ulong_t nr_extents; unsigned int extent_order;

/* @@ -92,7 +92,7 @@ struct xen_memory_exchange { * command will be non-zero. * 5. THIS FIELD MUST BE INITIALISED TO ZERO BY THE CALLER! */

• unsigned long nr_exchanged;

• xen_ulong_t nr_exchanged;

}; DEFINE_GUEST_HANDLE_STRUCT(xen_memory_exchange); @@ -148,8 +148,8 @@ DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mfn_list); */ #define XENMEM_machphys_mapping 12 struct xen_machphys_mapping {

• unsigned long v_start, v_end; /* Start and end virtual addresses. */
• unsigned long max_mfn; /* Maximum MFN that can be looked up. */

• xen_ulong_t v_start, v_end; /* Start and end virtual addresses. */
• xen_ulong_t max_mfn; /* Maximum MFN that can be looked up. */

}; DEFINE_GUEST_HANDLE_STRUCT(xen_machphys_mapping_t); @@ -169,7 +169,7 @@ struct xen_add_to_physmap { unsigned int space; /* Index into source mapping space. */

• unsigned long idx;

• xen_ulong_t idx;

/* GPFN where the source mapping page should appear. */ xen_pfn_t gpfn; @@ -186,7 +186,7 @@ struct xen_translate_gpfn_list { domid_t domid; /* Length of list. */

• unsigned long nr_gpfns;

• xen_ulong_t nr_gpfns;

/* List of GPFNs to translate. */ GUEST_HANDLE(ulong) gpfn_list; diff --git a/include/xen/interface/physdev.h b/include/xen/interface/physdev.h index 9ce788d..f616514 100644 --- a/include/xen/interface/physdev.h +++ b/include/xen/interface/physdev.h @@ -56,7 +56,7 @@ struct physdev_eoi { #define PHYSDEVOP_pirq_eoi_gmfn_v2 28 struct physdev_pirq_eoi_gmfn { /* IN */

• unsigned long gmfn;

• xen_ulong_t gmfn;

}; /* diff --git a/include/xen/interface/version.h b/include/xen/interface/version.h index e8b6519..30280c9 100644 --- a/include/xen/interface/version.h +++ b/include/xen/interface/version.h @@ -45,7 +45,7 @@ struct xen_changeset_info { #define XENVER_platform_parameters 5 struct xen_platform_parameters {

• unsigned long virt_start;

• xen_ulong_t virt_start;

};

#define XENVER_get_features 6

1.7.2.5