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Re: [Xen-devel] [PATCH v3 11/20] tty/hvc: xen: Use xen page definition

Started byDavid Vrabel <david.vrabel@citrix.com>
First post2015-08-20 12:00 +0200
Last post2015-08-28 17:10 +0200
Articles 2 — 2 participants

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  Re: [Xen-devel] [PATCH v3 11/20] tty/hvc: xen: Use xen page definition David Vrabel <david.vrabel@citrix.com> - 2015-08-20 12:00 +0200
    Re: [Xen-devel] [PATCH v3 11/20] tty/hvc: xen: Use xen page definition Julien Grall <julien.grall@citrix.com> - 2015-08-28 17:10 +0200

#1210368 — Re: [Xen-devel] [PATCH v3 11/20] tty/hvc: xen: Use xen page definition

FromDavid Vrabel <david.vrabel@citrix.com>
Date2015-08-20 12:00 +0200
SubjectRe: [Xen-devel] [PATCH v3 11/20] tty/hvc: xen: Use xen page definition
Message-ID<pZuND-1gR-59@gated-at.bofh.it>
On 07/08/15 17:46, Julien Grall wrote:
> The console ring is always based on the page granularity of Xen.
[...]
> --- a/drivers/tty/hvc/hvc_xen.c
> +++ b/drivers/tty/hvc/hvc_xen.c
> @@ -230,7 +230,7 @@ static int xen_hvm_console_init(void)
>  	if (r < 0 || v == 0)
>  		goto err;
>  	gfn = v;
> -	info->intf = xen_remap(gfn << PAGE_SHIFT, PAGE_SIZE);
> +	info->intf = xen_remap(gfn << XEN_PAGE_SHIFT, PAGE_SIZE);

You need XEN_PAGE_SIZE here I think...

>  	if (info->intf == NULL)
>  		goto err;
>  	info->vtermno = HVC_COOKIE;
> @@ -472,7 +472,7 @@ static int xencons_resume(struct xenbus_device *dev)
>  	struct xencons_info *info = dev_get_drvdata(&dev->dev);
>  
>  	xencons_disconnect_backend(info);
> -	memset(info->intf, 0, PAGE_SIZE);
> +	memset(info->intf, 0, XEN_PAGE_SIZE);

...particularly since you use it here.

David
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#1215386

FromJulien Grall <julien.grall@citrix.com>
Date2015-08-28 17:10 +0200
Message-ID<q2trY-6Qn-13@gated-at.bofh.it>
In reply to#1210368
Hi David,

On 20/08/15 10:55, David Vrabel wrote:
> On 07/08/15 17:46, Julien Grall wrote:
>> The console ring is always based on the page granularity of Xen.
> [...]
>> --- a/drivers/tty/hvc/hvc_xen.c
>> +++ b/drivers/tty/hvc/hvc_xen.c
>> @@ -230,7 +230,7 @@ static int xen_hvm_console_init(void)
>>  	if (r < 0 || v == 0)
>>  		goto err;
>>  	gfn = v;
>> -	info->intf = xen_remap(gfn << PAGE_SHIFT, PAGE_SIZE);
>> +	info->intf = xen_remap(gfn << XEN_PAGE_SHIFT, PAGE_SIZE);
> 
> You need XEN_PAGE_SIZE here I think...

Right, I did the mistake while rebase on my s/mfn/gfn/ series. I will
fix it in the next version.

Regards,

-- 
Julien Grall
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