From: Ben Guthro <bguthro@virtualiron.com>
To: xen-devel <xen-devel@lists.xensource.com>,
Robert Phillips <rphillips@virtualiron.com>
Subject: [PATCH][SVM] CPL initialization fix
Date: Mon, 10 Mar 2008 15:14:48 -0400 [thread overview]
Message-ID: <47D588A8.9030908@virtualiron.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 253 bytes --]
CPL should be determined by code segment's DPL, not data segment's.
This solves a problem migrating a QEMU guest without PV-on-HVM drivers
Signed-off-by: Robert Plillips <rphillips@virtualiron.com>
Signed-off-by: Ben Guthro <bguthro@virtualoiron.com>
[-- Attachment #2: lm-svm-cpl.patch --]
[-- Type: text/x-patch, Size: 439 bytes --]
diff -r f76f151a7431 xen/arch/x86/hvm/svm/svm.c
--- a/xen/arch/x86/hvm/svm/svm.c
+++ b/xen/arch/x86/hvm/svm/svm.c
@@ -557,7 +557,7 @@ static void svm_set_segment_register(str
break;
case x86_seg_ss:
memcpy(&vmcb->ss, reg, sizeof(*reg));
- vmcb->cpl = vmcb->ss.attr.fields.dpl;
+ vmcb->cpl = vmcb->cs.attr.fields.dpl;
break;
case x86_seg_tr:
memcpy(&vmcb->tr, reg, sizeof(*reg));
[-- Attachment #3: Type: text/plain, Size: 138 bytes --]
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next reply other threads:[~2008-03-10 19:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-10 19:14 Ben Guthro [this message]
2008-03-10 19:18 ` [PATCH][SVM] CPL initialization fix Keir Fraser
2008-03-10 19:26 ` Keir Fraser
2008-03-10 20:01 ` Robert Phillips
2008-03-10 21:57 ` Keir Fraser
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