Re: [PATCH XEN] xen: event channel arrays are xen_ulong_t and notunsigned long

From: Stefano Stabellini
Date: Tue Feb 19 2013 - 11:42:22 EST


On Tue, 19 Feb 2013, Ian Campbell wrote:
> On ARM we want these to be the same size on 32- and 64-bit.
>
> This is an ABI change on ARM. X86 does not change.
>
> Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> Cc: Jan Beulich <JBeulich@xxxxxxxx>
> Cc: Keir (Xen.org) <keir@xxxxxxx>
> Cc: Tim Deegan <tim@xxxxxxx>
> Cc: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> Cc: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
> Cc: xen-devel@xxxxxxxxxxxxx

Acked-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>


> tools/include/xen-foreign/mkheader.py | 6 ++++++
> xen/include/public/xen.h | 8 ++++----
> 2 files changed, 10 insertions(+), 4 deletions(-)
>
> diff --git a/tools/include/xen-foreign/mkheader.py b/tools/include/xen-foreign/mkheader.py
> index d189b07..57681fa 100644
> --- a/tools/include/xen-foreign/mkheader.py
> +++ b/tools/include/xen-foreign/mkheader.py
> @@ -21,13 +21,18 @@ inttypes["arm"] = {
> "unsigned long" : "uint32_t",
> "long" : "uint32_t",
> "xen_pfn_t" : "uint64_t",
> + "xen_ulong_t" : "uint64_t",
> };
> +header["arm"] = """
> +#define __arm___ARM32 1
> +""";
>
> # x86_32
> inttypes["x86_32"] = {
> "unsigned long" : "uint32_t",
> "long" : "uint32_t",
> "xen_pfn_t" : "uint32_t",
> + "xen_ulong_t" : "uint32_t",
> };
> header["x86_32"] = """
> #define __i386___X86_32 1
> @@ -42,6 +47,7 @@ inttypes["x86_64"] = {
> "unsigned long" : "__align8__ uint64_t",
> "long" : "__align8__ uint64_t",
> "xen_pfn_t" : "__align8__ uint64_t",
> + "xen_ulong_t" : "__align8__ uint64_t",
> };
> header["x86_64"] = """
> #if defined(__GNUC__) && !defined(__STRICT_ANSI__)
> diff --git a/xen/include/public/xen.h b/xen/include/public/xen.h
> index 5593066..99c8212 100644
> --- a/xen/include/public/xen.h
> +++ b/xen/include/public/xen.h
> @@ -556,7 +556,7 @@ DEFINE_XEN_GUEST_HANDLE(multicall_entry_t);
> * Event channel endpoints per domain:
> * 1024 if a long is 32 bits; 4096 if a long is 64 bits.
> */
> -#define NR_EVENT_CHANNELS (sizeof(unsigned long) * sizeof(unsigned long) * 64)
> +#define NR_EVENT_CHANNELS (sizeof(xen_ulong_t) * sizeof(xen_ulong_t) * 64)
>
> struct vcpu_time_info {
> /*
> @@ -613,7 +613,7 @@ struct vcpu_info {
> */
> uint8_t evtchn_upcall_pending;
> uint8_t evtchn_upcall_mask;
> - unsigned long evtchn_pending_sel;
> + xen_ulong_t evtchn_pending_sel;
> struct arch_vcpu_info arch;
> struct vcpu_time_info time;
> }; /* 64 bytes (x86) */
> @@ -663,8 +663,8 @@ struct shared_info {
> * per-vcpu selector word to be set. Each bit in the selector covers a
> * 'C long' in the PENDING bitfield array.
> */
> - unsigned long evtchn_pending[sizeof(unsigned long) * 8];
> - unsigned long evtchn_mask[sizeof(unsigned long) * 8];
> + xen_ulong_t evtchn_pending[sizeof(xen_ulong_t) * 8];
> + xen_ulong_t evtchn_mask[sizeof(xen_ulong_t) * 8];
>
> /*
> * Wallclock time: updated only by control software. Guests should base
> --
> 1.7.9.1
>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/