 Home |
Products |
Support |
Community |
News |
xen-devel
[Xen-devel] Difference between vmalloc_to_pfn and virt_to_pfn
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | [Xen-devel] Difference between vmalloc_to_pfn and virt_to_pfn |
| From: | Srujan Kotikela <ksrujandas@xxxxxxxxx> |
| Date: | Tue, 28 Jun 2011 12:32:46 -0500 |
| Delivery-date: | Tue, 28 Jun 2011 10:35:38 -0700 |
| Dkim-signature: | v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; bh=1TO4bqs3cVuUfl8GGVEUoYXl2O/NPDMjW35dFuX5x7U=; b=O0xXEPFnIhhytxP+MooWi8F7pYdmAJ+vV2w2kta6MJuXg55MJNk9KjdI+3A3dMu/MM 7u4PoSuhTXnOs6YDP0xOKRST8eRoOxBAVwD1H96qKAWJXP+HO/jSEqY+bFXtc3l+j23f j3xwBw7xOuQmBF3QDIA5zYYsqdUQLNyJbHdnk= |
| Envelope-to: | www-data@xxxxxxxxxxxxxxxxxxx |
| 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> |
| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
|
Hi, I was trying to convert a virtual adrress in a HVM guest to the MFN. I tried using vmalloc_to_pfn(virt_address) and then passed the resulting pfn to VMM through a hypercall. Inside the VMM I tried calling gfn_to_mfn(pfn) with pfn receieved from hypercall. This function always gave me INVALID_MFN error (~0UL). When I replaced the vmalloc_to_pfn with virt_to_pfn(virt_address) I am getting some MFN value returned by gfn_to_mfn. Just to make sure, I passed the value to gmfn_to_mfn and I am getting the same value as returned by gfn_to_mfn. Now my questions: 1. What is the difference between vmalloc_to_pfn and virt_to_pfn (apart from the fact that one is linux kernel function and the other is xen function) ? 2. Is there a way to verify/conform whether the MFN is correct ? _SDK _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | [Xen-devel] Re: [PATCH] Squash xc_e820.h (and delete) into xenctrl.h, Ian Jackson |
|---|---|
| Next by Date: | [Xen-devel] [xen-unstable test] 7751: regressions - FAIL, xen . org |
| Previous by Thread: | [Xen-devel] [xen-4.1-testing test] 7750: regressions - FAIL, xen . org |
| Next by Thread: | Re: [Xen-devel] Difference between vmalloc_to_pfn and virt_to_pfn, Tim Deegan |
| Indexes: | [Date] [Thread] [Top] [All Lists] |
