Files
system76-edk2/MdePkg/Library/BaseLib/X64/RmpAdjust.nasm
Tom Lendacky 2b5b2ff04d MdePkg/BaseLib: add support for RMPADJUST instruction
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>
2021-05-29 12:15:21 +00:00

41 lines
1.0 KiB
NASM

;-----------------------------------------------------------------------------
;
; Copyright (c) 2021, Advanced Micro Devices, Inc. All rights reserved.<BR>
; SPDX-License-Identifier: BSD-2-Clause-Patent
;
; Module Name:
;
; RmpAdjust.Asm
;
; Abstract:
;
; AsmRmpAdjust function
;
; Notes:
;
;-----------------------------------------------------------------------------
%include "Nasm.inc"
SECTION .text
;-----------------------------------------------------------------------------
; UINT32
; EFIAPI
; AsmRmpAdjust (
; IN UINT64 Rax,
; IN UINT64 Rcx,
; IN UINT64 Rdx
; )
;-----------------------------------------------------------------------------
global ASM_PFX(AsmRmpAdjust)
ASM_PFX(AsmRmpAdjust):
mov rax, rcx ; Input Rax is in RCX by calling convention
mov rcx, rdx ; Input Rcx is in RDX by calling convention
mov rdx, r8 ; Input Rdx is in R8 by calling convention
RMPADJUST
; RMPADJUST returns the status in the EAX register.
ret