 Home |
Products |
Support |
Community |
News |
xen-devel
Re: [Xen-devel] [PATCH] microcode update support for AMD CPUs
| To: | Christoph Egger <Christoph.Egger@xxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] microcode update support for AMD CPUs |
| From: | Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx> |
| Date: | Mon, 15 Sep 2008 15:10:09 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx |
| Delivery-date: | Mon, 15 Sep 2008 07:10:48 -0700 |
| Envelope-to: | www-data@xxxxxxxxxxxxxxxxxxx |
| In-reply-to: | <200809121431.22715.Christoph.Egger@xxxxxxx> |
| List-help: | <mailto:xen-devel-request@lists.xensource.com?subject=help> |
| List-id: | Xen developer discussion <xen-devel.lists.xensource.com> |
| List-post: | <mailto:xen-devel@lists.xensource.com> |
| List-subscribe: | <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe> |
| List-unsubscribe: | <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe> |
| Newsgroups: | chiark.mail.xen.devel |
| References: | <200809121431.22715.Christoph.Egger@xxxxxxx> |
| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
Christoph Egger writes ("[Xen-devel] [PATCH] microcode update support for AMD
CPUs"):
> + edx = (unsigned int)((unsigned long)(addr >> 32));
This is wrong. addr is an unsigned long, ie 32 bits so you are
shifting by >= the word size, which is not permitted. Helpfully, many
compilers warn about it.
But addr came from this:
addr = (unsigned long)&uci->mc.mc_amd->hdr.data_code;
surely this cannot be right if you're expecting the address to be
longer than 32 bits in some cases ?
Ian.
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | Re: [Xen-devel] [PATCH] Add new location of Linux direct-map to theplaces to look for writable mappings, George Dunlap |
|---|---|
| Next by Date: | Re: [Xen-devel] [PATCH] microcode update support for AMD CPUs, Keir Fraser |
| Previous by Thread: | [Xen-devel] [PATCH] microcode update support for AMD CPUs, Christoph Egger |
| Next by Thread: | Re: [Xen-devel] [PATCH] microcode update support for AMD CPUs, Keir Fraser |
| Indexes: | [Date] [Thread] [Top] [All Lists] |
