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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2020-08-12 15:21:35 -0500 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2020-08-16 16:45:42 +0000 |
| commit | f8422f1e0be2654ca253630e0a9996ad87f89c9e (patch) | |
| tree | dfe07320acce57ce75de13cf4c148d0e66af5f42 /UefiCpuPkg/Include | |
| parent | 9b3ca509abd4e45439bbdfe2c2fa8780c950320a (diff) | |
| download | edk2-f8422f1e0be2654ca253630e0a9996ad87f89c9e.tar.gz edk2-f8422f1e0be2654ca253630e0a9996ad87f89c9e.tar.bz2 edk2-f8422f1e0be2654ca253630e0a9996ad87f89c9e.zip | |
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>
Diffstat (limited to 'UefiCpuPkg/Include')
0 files changed, 0 insertions, 0 deletions