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[Xen-changelog] SVM patch to ensure that PAE bit is set for 32bit guests
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| Subject: | [Xen-changelog] SVM patch to ensure that PAE bit is set for 32bit guests on 32bit PAE, |
| From: | Xen patchbot -3.0-testing <patchbot-3.0-testing@xxxxxxxxxxxxxxxxxxx> |
| Date: | Thu, 20 Apr 2006 18:04:21 +0000 |
| Delivery-date: | Thu, 20 Apr 2006 13:33:33 -0700 |
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# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID b769efb6b1091068baf170b54b35189a3c776f5c
# Parent 09203dffee8a9f5825f7388561d3b464847639bc
SVM patch to ensure that PAE bit is set for 32bit guests on 32bit PAE,
by using paging levels>=3 rather than ifdef i386. This patch fixes
the "black screen" hang issue when building w/XEN_TARGET_X86_PAE=y on
32bit.
Tested linux debian and win2003EE guests with pae=1. The linux
guest boots without error, while the windows guest sometimes hits a
bug() in shadow.c. Both VT and SVM encounter the same bug.
Signed-off-by: Tom Woller <thomas.woller@xxxxxxx>
diff -r 09203dffee8a -r b769efb6b109 xen/include/asm-x86/hvm/svm/vmcb.h
--- a/xen/include/asm-x86/hvm/svm/vmcb.h Thu Apr 20 13:42:31 2006 +0100
+++ b/xen/include/asm-x86/hvm/svm/vmcb.h Thu Apr 20 17:04:58 2006 +0100
@@ -473,10 +473,10 @@ enum {
#define VMCB_EFLAGS_RESERVED_1 0x00000002 /* bitmap for 1 */
/* These bits in the CR4 are owned by the host */
-#ifdef __i386__
-#define SVM_CR4_HOST_MASK (0)
+#if CONFIG_PAGING_LEVELS >= 3
+#define SVM_CR4_HOST_MASK (X86_CR4_PAE)
#else
-#define SVM_CR4_HOST_MASK (X86_CR4_PAE)
+#define SVM_CR4_HOST_MASK 0
#endif
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