linux-kernel - Re: [PATCH RESEND] xen/arm: use the _

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Date:	Mon, 5 Nov 2012 10:58:17 +0000
From:	Dave Martin <dave.martin@...aro.org>
To:	Stefano Stabellini <stefano.stabellini@...citrix.com>
Cc:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>,
	"konrad.wilk@...cle.com" <konrad.wilk@...cle.com>,
	"Tim (Xen.org)" <tim@....org>,
	Ian Campbell <Ian.Campbell@...rix.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linaro-dev@...ts.linaro.org" <linaro-dev@...ts.linaro.org>,
	"arnd@...db.de" <arnd@...db.de>
Subject: Re: [PATCH RESEND] xen/arm: use the __HVC macro

On Wed, Oct 24, 2012 at 04:26:08PM +0100, Stefano Stabellini wrote:
> Use the new __HVC macro in hypercall.S.
> 
> Signed-off-by: Stefano Stabellini <stefano.stabellini@...citrix.com>

This is correct usage of the __HVC() macro, so

Acked-by: Dave Martin <dave.martin@...aro.org>

> ---
>  arch/arm/xen/hypercall.S |   14 +++++---------
>  1 files changed, 5 insertions(+), 9 deletions(-)
> 
> diff --git a/arch/arm/xen/hypercall.S b/arch/arm/xen/hypercall.S
> index 074f5ed..71f7239 100644
> --- a/arch/arm/xen/hypercall.S
> +++ b/arch/arm/xen/hypercall.S
> @@ -48,20 +48,16 @@
>  
>  #include <linux/linkage.h>
>  #include <asm/assembler.h>
> +#include <asm/opcodes-virt.h>
>  #include <xen/interface/xen.h>
>  
>  
> -/* HVC 0xEA1 */
> -#ifdef CONFIG_THUMB2_KERNEL
> -#define xen_hvc .word 0xf7e08ea1
> -#else
> -#define xen_hvc .word 0xe140ea71
> -#endif
> +#define XEN_IMM 0xEA1
>  
>  #define HYPERCALL_SIMPLE(hypercall)		\
>  ENTRY(HYPERVISOR_##hypercall)			\
>  	mov r12, #__HYPERVISOR_##hypercall;	\
> -	xen_hvc;							\
> +	__HVC(XEN_IMM);						\
>  	mov pc, lr;							\
>  ENDPROC(HYPERVISOR_##hypercall)
>  
> @@ -76,7 +72,7 @@ ENTRY(HYPERVISOR_##hypercall)			\
>  	stmdb sp!, {r4}						\
>  	ldr r4, [sp, #4]					\
>  	mov r12, #__HYPERVISOR_##hypercall;	\
> -	xen_hvc								\
> +	__HVC(XEN_IMM);						\
>  	ldm sp!, {r4}						\
>  	mov pc, lr							\
>  ENDPROC(HYPERVISOR_##hypercall)
> @@ -100,7 +96,7 @@ ENTRY(privcmd_call)
>  	mov r2, r3
>  	ldr r3, [sp, #8]
>  	ldr r4, [sp, #4]
> -	xen_hvc
> +	__HVC(XEN_IMM)
>  	ldm sp!, {r4}
>  	mov pc, lr
>  ENDPROC(privcmd_call);
> -- 
> 1.7.2.5
--
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