| To: | Pete Zaitcev <zaitcev@xxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] auto_translated_physmap in Fedora |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | 2006年7月10日 12:44:24 +0100 |
| Cc: | xen-devel@xxxxxxxxxxxxxxxxxxx, quintela@xxxxxxxxxx |
| Delivery-date: | 2006年7月10日 04:44:57 -0700 |
| Envelope-to: | www-data@xxxxxxxxxxxxxxxxxx |
| In-reply-to: | <20060706190738.4f611e63.zaitcev@xxxxxxxxxx> |
| 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/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe> |
| List-unsubscribe: | <http://lists.xensource.com/cgi-bin/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe> |
| References: | <20060706190738.4f611e63.zaitcev@xxxxxxxxxx> |
| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
On 7 Jul 2006, at 03:07, Pete Zaitcev wrote:
The header includes 'auto_translated_physmap' indicating that the guest can handle that feature, but does not require it to be enabled.I noticed one curious thing while working on some issues with Fedora. At least in 2.6.17-1.2302_FC6xen, the following evaluates to false: if (xen_feature(XENFEAT_auto_translated_physmap)) return pfn; But the head-xen.S looks like this: .section __xen_guest .ascii "GUEST_OS=linux,GUEST_VER=2.6" .ascii ",XEN_VER=xen-3.0" .ascii ",VIRT_BASE=0x"; utoh __START_KERNEL_map.ascii ",HYPERCALL_PAGE=0x"; utoh (phys_hypercall_page >> PAGE_SHIFT).ascii ",FEATURES=writable_page_tables" .ascii "|writable_descriptor_tables" .ascii "|auto_translated_physmap" .ascii "|supervisor_mode_kernel" .ascii ",LOADER=generic" .byte 0 Everything continues to work just fine, thanks to runtime checks of xen_feature() like the above.
-- Keir _______________________________________________ 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] kernel BUG at net/core/dev.c:1133! , Keir Fraser |
|---|---|
| Next by Date: | [Xen-devel] Mac address FE:FF:FF:FF:FF:FF , Christophe Devriese |
| Previous by Thread: | Re: [Xen-devel] auto_translated_physmap in Fedora , Christian Limpach |
| Next by Thread: | [Xen-devel] Re: Re: VT is comically slow , alex |
| Indexes: | [Date] [Thread] [Top] [All Lists] |