Christoph Egger
2009-Apr-06 09:24 UTC
[Xen-devel] [PATCH] [HVM] cross-vendor migration: Allow 32bit-apps run in 64bit guests
Hi!
Attached patch makes cross-vendor migration demoable with 32bit applications
in 64bit guests which use sysenter/sysexit/syscall instructions.
Changes the patch includes:
- SVM: intercept SYSENTER MSRs and emulate them
- SVM: use permament 64bit storage for SYSENTER MSR emulation.
SYSENTER fields in VMCB are not "permament" since upper
32bits
are undefined and get cleared when a VMRUN/VMEXIT is between
a write and read access.
- SVM: improve debugging aid: dump CPU registers
- x86_emulate: emulate sysenter/sysexit/syscall instructions
- SVM/VMX: Intercept #UD and invoke instruction emulation
- x86_emulate: cache current vcpu through the whole emulation path
Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
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