dfd41aef78
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3275 Version 2 of GHCB introduces NAE for creating AP when SEV-SNP is enabled in the guest VM. See the GHCB specification, Table 5 "List of Supported Non-Automatic Events" and sections 4.1.9 and 4.3.2, for further details. While at it, define the VMSA state save area that is required for creating the AP. The save area format is defined in AMD APM volume 2, Table B-4 (there is a mistake in the table that defines the size of the reserved area at offset 0xc8 as a dword, when it is actually a word). The format of the save area segment registers is further defined in AMD APM volume 2, sections 10 and 15.5. Cc: James Bottomley <jejb@linux.ibm.com> Cc: Min Xu <min.m.xu@intel.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Tom Lendacky <thomas.lendacky@amd.com> Cc: Jordan Justen <jordan.l.justen@intel.com> Cc: Ard Biesheuvel <ardb+tianocore@kernel.org> Cc: Laszlo Ersek <lersek@redhat.com> Cc: Erdem Aktas <erdemaktas@google.com> Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Liming Gao <gaoliming@byosoft.com.cn> Cc: Zhiguang Liu <zhiguang.liu@intel.com> Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Brijesh Singh <brijesh.singh@amd.com> Message-Id: <20210519181949.6574-7-brijesh.singh@amd.com> [lersek@redhat.com: fix typo in BZ reference]