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MdePkg/BaseLib: add support for RMPADJUST instruction

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BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3275

The RMPADJUST instruction will be used by the SEV-SNP guest to modify the
RMP permissions for a guest page. See AMD APM volume 3 for further
details.

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: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Message-Id: <20210519181949.6574-9-brijesh.singh@amd.com>
This commit is contained in:
Tom Lendacky
2021-05-19 13:19:44 -05:00
committed by mergify[bot]
parent 5a7cbd54a1
commit 2b5b2ff04d
4 changed files with 84 additions and 0 deletions
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8
MdePkg/Include/X64/Nasm.inc
View File

@@ -41,6 +41,14 @@
DB 0xF2, 0x0F, 0x01, 0xFF
%endmacro
;
; Macro for the RMPADJUST instruction, defined in AMD APM volume 3.
; NASM feature request URL: https://bugzilla.nasm.us/show_bug.cgi?id=3392754
;
%macro RMPADJUST 0
DB 0xF3, 0x0F, 0x01, 0xFE
%endmacro
; NASM provides built-in macros STRUC and ENDSTRUC for structure definition.
; For example, to define a structure called mytype containing a longword,
; a word, a byte and a string of bytes, you might code