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| author | Keir Fraser <keir.fraser@citrix.com> | 2008-06-27 16:20:59 +0100 |
|---|---|---|
| committer | Keir Fraser <keir.fraser@citrix.com> | 2008-06-27 16:20:59 +0100 |
| commit | 80982c971fc3d49622412a9b2cb038e004acef49 (patch) | |
| tree | e65715c46bb7d0a43fdc968c40bdc8d5fa6b7611 /xen/arch/x86/x86_emulate | |
| parent | c5699e27710ea9678f37b29b4da48c964bfc7120 (diff) | |
| download | xen-80982c971fc3d49622412a9b2cb038e004acef49.tar.gz xen-80982c971fc3d49622412a9b2cb038e004acef49.tar.bz2 xen-80982c971fc3d49622412a9b2cb038e004acef49.zip | |
hvm: Fix lmsw handling
The lmsw instruction can be used to set CR0_PE, but can never clear
it, once set.
Signed-off-by: Trolle Selander <trolle.selander@eu.citrix.com>
Diffstat (limited to 'xen/arch/x86/x86_emulate')
| -rw-r--r-- | xen/arch/x86/x86_emulate/x86_emulate.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/xen/arch/x86/x86_emulate/x86_emulate.c b/xen/arch/x86/x86_emulate/x86_emulate.c index 33718f2e85..1e67c0f4d7 100644 --- a/xen/arch/x86/x86_emulate/x86_emulate.c +++ b/xen/arch/x86/x86_emulate/x86_emulate.c @@ -3284,7 +3284,7 @@ x86_emulate( else if ( (rc = ops->read(ea.mem.seg, ea.mem.off, &cr0w, 2, ctxt)) ) goto done; - cr0 &= 0xffff0000; + cr0 &= 0xffff0001; /* lmsw can set, but never clear, PE */ cr0 |= (uint16_t)cr0w; if ( (rc = ops->write_cr(0, cr0, ctxt)) ) goto done; |