2b5b2ff04d
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>
41 lines
1.0 KiB
NASM
41 lines
1.0 KiB
NASM
;-----------------------------------------------------------------------------
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;
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; Copyright (c) 2021, Advanced Micro Devices, Inc. All rights reserved.<BR>
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; SPDX-License-Identifier: BSD-2-Clause-Patent
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;
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; Module Name:
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;
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; RmpAdjust.Asm
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;
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; Abstract:
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;
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; AsmRmpAdjust function
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;
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; Notes:
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;
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;-----------------------------------------------------------------------------
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%include "Nasm.inc"
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SECTION .text
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;-----------------------------------------------------------------------------
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; UINT32
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; EFIAPI
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; AsmRmpAdjust (
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; IN UINT64 Rax,
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; IN UINT64 Rcx,
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; IN UINT64 Rdx
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; )
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;-----------------------------------------------------------------------------
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global ASM_PFX(AsmRmpAdjust)
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ASM_PFX(AsmRmpAdjust):
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mov rax, rcx ; Input Rax is in RCX by calling convention
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mov rcx, rdx ; Input Rcx is in RDX by calling convention
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mov rdx, r8 ; Input Rdx is in R8 by calling convention
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RMPADJUST
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; RMPADJUST returns the status in the EAX register.
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ret
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