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audk/MdePkg/Library/BaseLib/Ia32
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Tom Lendacky f8422f1e0b MdePkg/BaseLib: Add support for the VMGEXIT instruction 
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198

VMGEXIT is a new instruction used for Hypervisor/Guest communication when
running as an SEV-ES guest. A VMGEXIT will cause an automatic exit (AE)
to occur, resulting in a #VMEXIT with an exit code value of 0x403.

Since SEV-ES is only supported in X64, provide the necessary X64 support
to execute the VMGEXIT instruction, which is coded as "rep vmmcall". For
IA32, since "vmmcall" is not supported in NASM 32-bit mode and VMGEXIT
should never be called, provide a stub implementation that is identical
to CpuBreakpoint().

Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
 		2020-08-16 16:45:42 +00:00
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ARShiftU64.c MdePkg: Replace BSD License with BSD+Patent License 2019-04-09 10:58:13 -07:00
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GccInline.c MdePkg/BaseLib: Break out IA32/X64 GCC inline privileged functions 2020-07-15 05:25:21 +00:00
GccInlinePriv.c MdePkg/BaseLib: Break out IA32/X64 GCC inline privileged functions 2020-07-15 05:25:21 +00:00
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VmgExit.nasm MdePkg/BaseLib: Add support for the VMGEXIT instruction 2020-08-16 16:45:42 +00:00
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XGetBv.nasm MdePkg/BaseLib: Add support for the XGETBV instruction 2020-08-16 16:45:42 +00:00