WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

[Xen-devel] [PATCH 05/24] xen: clean up xen_load_gdt

To: "H. Peter Anvin" <hpa@xxxxxxxxx>
Subject: [Xen-devel] [PATCH 05/24] xen: clean up xen_load_gdt
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Fri, 13 Mar 2009 01:11:41 -0700
Cc: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, the arch/x86 maintainers <x86@xxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
Delivery-date: Fri, 13 Mar 2009 01:17:36 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
In-reply-to: <1236931920-6861-1-git-send-email-jeremy@xxxxxxxx>
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>
References: <1236931920-6861-1-git-send-email-jeremy@xxxxxxxx>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
From: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>

Makes the logic a bit clearer.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>
---
 arch/x86/xen/enlighten.c |   15 +++++++++++++--
 1 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 70b355d..5776dc2 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -301,10 +301,21 @@ static void xen_load_gdt(const struct desc_ptr *dtr)
        frames = mcs.args;
 
        for (f = 0; va < dtr->address + size; va += PAGE_SIZE, f++) {
-               frames[f] = arbitrary_virt_to_mfn((void *)va);
+               int level;
+               pte_t *ptep = lookup_address(va, &level);
+               unsigned long pfn, mfn;
+               void *virt;
+
+               BUG_ON(ptep == NULL);
+
+               pfn = pte_pfn(*ptep);
+               mfn = pfn_to_mfn(pfn);
+               virt = __va(PFN_PHYS(pfn));
+
+               frames[f] = mfn;
 
                make_lowmem_page_readonly((void *)va);
-               make_lowmem_page_readonly(mfn_to_virt(frames[f]));
+               make_lowmem_page_readonly(virt);
        }
 
        MULTI_set_gdt(mcs.mc, frames, size / sizeof(struct desc_struct));
-- 
1.6.0.6


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel

<Prev in Thread] Current Thread [Next in Thread>