From: "Lendacky, Thomas" <thomas.lendacky@amd.com>
To: devel@edk2.groups.io
Cc: Brijesh Singh <brijesh.singh@amd.com>,
Ard Biesheuvel <ard.biesheuvel@arm.com>,
Eric Dong <eric.dong@intel.com>,
Jordan Justen <jordan.l.justen@intel.com>,
Laszlo Ersek <lersek@redhat.com>,
Liming Gao <liming.gao@intel.com>,
Michael D Kinney <michael.d.kinney@intel.com>,
Ray Ni <ray.ni@intel.com>
Subject: [PATCH v10 07/46] MdePkg/BaseLib: Add support for the VMGEXIT instruction
Date: Tue, 14 Jul 2020 09:27:38 -0500 [thread overview]
Message-ID: <a32aaeb03fefc9484f81796069bdc329579eea38.1594736896.git.thomas.lendacky@amd.com> (raw)
In-Reply-To: <cover.1594736896.git.thomas.lendacky@amd.com>
From: Tom Lendacky <thomas.lendacky@amd.com>
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.
Provide the necessary support to execute the VMGEXIT instruction, which
is "rep; vmmcall".
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
---
MdePkg/Library/BaseLib/BaseLib.inf | 2 ++
MdePkg/Include/Library/BaseLib.h | 14 +++++++++
MdePkg/Library/BaseLib/Ia32/GccInline.c | 17 +++++++++++
MdePkg/Library/BaseLib/X64/GccInline.c | 17 +++++++++++
MdePkg/Library/BaseLib/Ia32/VmgExit.nasm | 37 ++++++++++++++++++++++++
MdePkg/Library/BaseLib/X64/VmgExit.nasm | 32 ++++++++++++++++++++
6 files changed, 119 insertions(+)
create mode 100644 MdePkg/Library/BaseLib/Ia32/VmgExit.nasm
create mode 100644 MdePkg/Library/BaseLib/X64/VmgExit.nasm
diff --git a/MdePkg/Library/BaseLib/BaseLib.inf b/MdePkg/Library/BaseLib/BaseLib.inf
index da6bc22a3e2b..7cf6467fa77b 100644
--- a/MdePkg/Library/BaseLib/BaseLib.inf
+++ b/MdePkg/Library/BaseLib/BaseLib.inf
@@ -154,6 +154,7 @@ [Sources.Ia32]
Ia32/EnableCache.c | MSFT
Ia32/DisableCache.c | MSFT
Ia32/XGetBv.nasm | MSFT
+ Ia32/VmgExit.nasm | MSFT
Ia32/GccInline.c | GCC
@@ -289,6 +290,7 @@ [Sources.X64]
X64/ReadCr0.nasm| MSFT
X64/ReadEflags.nasm| MSFT
X64/XGetBv.nasm | MSFT
+ X64/VmgExit.nasm | MSFT
X64/Non-existing.c
diff --git a/MdePkg/Include/Library/BaseLib.h b/MdePkg/Include/Library/BaseLib.h
index 7edf0051a0a0..04fb329eaabb 100644
--- a/MdePkg/Include/Library/BaseLib.h
+++ b/MdePkg/Include/Library/BaseLib.h
@@ -7848,6 +7848,20 @@ AsmXGetBv (
);
+/**
+ Executes a VMGEXIT instruction (VMMCALL with a REP prefix)
+
+ Executes a VMGEXIT instruction. This function is only available on IA-32 and
+ x64.
+
+**/
+VOID
+EFIAPI
+AsmVmgExit (
+ VOID
+ );
+
+
/**
Patch the immediate operand of an IA32 or X64 instruction such that the byte,
word, dword or qword operand is encoded at the end of the instruction's
diff --git a/MdePkg/Library/BaseLib/Ia32/GccInline.c b/MdePkg/Library/BaseLib/Ia32/GccInline.c
index c962bcfa4617..d6a7581b36f6 100644
--- a/MdePkg/Library/BaseLib/Ia32/GccInline.c
+++ b/MdePkg/Library/BaseLib/Ia32/GccInline.c
@@ -1791,3 +1791,20 @@ AsmXGetBv (
}
+/**
+ Executes a VMGEXIT instruction.
+
+ Executes a VMGEXIT instruction. This function is only available on IA-32 and
+ X64.
+
+**/
+VOID
+EFIAPI
+AsmVmgExit (
+ VOID
+ )
+{
+ __asm__ __volatile__ ("rep; vmmcall":::"memory");
+}
+
+
diff --git a/MdePkg/Library/BaseLib/X64/GccInline.c b/MdePkg/Library/BaseLib/X64/GccInline.c
index 915555198f9f..0685337bbb56 100644
--- a/MdePkg/Library/BaseLib/X64/GccInline.c
+++ b/MdePkg/Library/BaseLib/X64/GccInline.c
@@ -1828,3 +1828,20 @@ AsmXGetBv (
}
+/**
+ Executes a VMGEXIT instruction.
+
+ Executes a VMGEXIT instruction. This function is only available on IA-32 and
+ X64.
+
+**/
+VOID
+EFIAPI
+AsmVmgExit (
+ VOID
+ )
+{
+ __asm__ __volatile__ ("rep; vmmcall":::"memory");
+}
+
+
diff --git a/MdePkg/Library/BaseLib/Ia32/VmgExit.nasm b/MdePkg/Library/BaseLib/Ia32/VmgExit.nasm
new file mode 100644
index 000000000000..a4b37385cc7a
--- /dev/null
+++ b/MdePkg/Library/BaseLib/Ia32/VmgExit.nasm
@@ -0,0 +1,37 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (C) 2020, Advanced Micro Devices, Inc. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+; Module Name:
+;
+; VmgExit.Asm
+;
+; Abstract:
+;
+; AsmVmgExit function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+ SECTION .text
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; AsmVmgExit (
+; VOID
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(AsmVmgExit)
+ASM_PFX(AsmVmgExit):
+;
+; NASM doesn't support the vmmcall instruction in 32-bit mode, so work around
+; this by temporarily switching to 64-bit mode.
+;
+BITS 64
+ rep vmmcall
+BITS 32
+ ret
+
diff --git a/MdePkg/Library/BaseLib/X64/VmgExit.nasm b/MdePkg/Library/BaseLib/X64/VmgExit.nasm
new file mode 100644
index 000000000000..26f034593c67
--- /dev/null
+++ b/MdePkg/Library/BaseLib/X64/VmgExit.nasm
@@ -0,0 +1,32 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (C) 2020, Advanced Micro Devices, Inc. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+; Module Name:
+;
+; VmgExit.Asm
+;
+; Abstract:
+;
+; AsmVmgExit function
+;
+; Notes:
+;
+;------------------------------------------------------------------------------
+
+ DEFAULT REL
+ SECTION .text
+
+;------------------------------------------------------------------------------
+; VOID
+; EFIAPI
+; AsmVmgExit (
+; VOID
+; );
+;------------------------------------------------------------------------------
+global ASM_PFX(AsmVmgExit)
+ASM_PFX(AsmVmgExit):
+ rep vmmcall
+ ret
+
--
2.27.0
next prev parent reply other threads:[~2020-07-14 14:30 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-14 14:27 [PATCH v10 00/46] SEV-ES guest support Lendacky, Thomas
2020-07-14 14:27 ` [PATCH v10 01/46] MdeModulePkg: Create PCDs to be used in support of SEV-ES Lendacky, Thomas
2020-07-14 14:27 ` [PATCH v10 02/46] UefiCpuPkg: Create PCD " Lendacky, Thomas
2020-07-14 14:27 ` [PATCH v10 03/46] MdePkg: Add the MSR definition for the GHCB register Lendacky, Thomas
2020-07-14 14:27 ` [PATCH v10 04/46] MdePkg: Add a structure definition for the GHCB Lendacky, Thomas
2020-07-14 14:27 ` [PATCH v10 05/46] MdeModulePkg/DxeIplPeim: Support GHCB pages when creating page tables Lendacky, Thomas
2020-07-14 14:27 ` [PATCH v10 06/46] MdePkg/BaseLib: Add support for the XGETBV instruction Lendacky, Thomas
2020-07-15 15:55 ` [edk2-devel] " Laszlo Ersek
2020-07-15 16:17 ` Lendacky, Thomas
2020-07-17 15:46 ` Lendacky, Thomas
2020-07-14 14:27 ` Lendacky, Thomas [this message]
2020-07-14 14:27 ` [PATCH v10 08/46] UefiCpuPkg: Implement library support for VMGEXIT Lendacky, Thomas
2020-07-14 14:27 ` [PATCH v10 09/46] OvmfPkg: Prepare OvmfPkg to use the VmgExitLib library Lendacky, Thomas
2020-07-14 14:27 ` [PATCH v10 10/46] UefiPayloadPkg: Prepare UefiPayloadPkg " Lendacky, Thomas
2020-07-20 15:27 ` [edk2-devel] " Ma, Maurice
2020-07-14 14:27 ` [PATCH v10 11/46] UefiCpuPkg/CpuExceptionHandler: Add base support for the #VC exception Lendacky, Thomas
2020-07-14 14:27 ` [PATCH v10 12/46] OvmfPkg/VmgExitLib: Implement library support for VmgExitLib in OVMF Lendacky, Thomas
2020-07-15 16:06 ` [edk2-devel] " Laszlo Ersek
2020-07-14 14:27 ` [PATCH v10 13/46] OvmfPkg/VmgExitLib: Add support for IOIO_PROT NAE events Lendacky, Thomas
2020-07-15 16:08 ` [edk2-devel] " Laszlo Ersek
2020-07-14 14:27 ` [PATCH v10 14/46] OvmfPkg/VmgExitLib: Support string IO " Lendacky, Thomas
2020-07-15 16:09 ` [edk2-devel] " Laszlo Ersek
2020-07-14 14:27 ` [PATCH v10 15/46] OvmfPkg/VmgExitLib: Add support for CPUID " Lendacky, Thomas
2020-07-15 16:10 ` [edk2-devel] " Laszlo Ersek
2020-07-14 14:27 ` [PATCH v10 16/46] OvmfPkg/VmgExitLib: Add support for MSR_PROT " Lendacky, Thomas
2020-07-15 16:11 ` [edk2-devel] " Laszlo Ersek
2020-07-14 14:27 ` [PATCH v10 17/46] OvmfPkg/VmgExitLib: Add support for NPF NAE events (MMIO) Lendacky, Thomas
2020-07-15 16:19 ` [edk2-devel] " Laszlo Ersek
2020-07-14 14:27 ` [PATCH v10 18/46] OvmfPkg/VmgExitLib: Add support for WBINVD NAE events Lendacky, Thomas
2020-07-15 16:21 ` [edk2-devel] " Laszlo Ersek
2020-07-14 14:27 ` [PATCH v10 19/46] OvmfPkg/VmgExitLib: Add support for RDTSC " Lendacky, Thomas
2020-07-15 16:21 ` [edk2-devel] " Laszlo Ersek
2020-07-14 14:27 ` [PATCH v10 20/46] OvmfPkg/VmgExitLib: Add support for RDPMC " Lendacky, Thomas
2020-07-15 16:21 ` [edk2-devel] " Laszlo Ersek
2020-07-14 14:27 ` [PATCH v10 21/46] OvmfPkg/VmgExitLib: Add support for INVD " Lendacky, Thomas
2020-07-15 16:21 ` [edk2-devel] " Laszlo Ersek
2020-07-14 14:27 ` [PATCH v10 22/46] OvmfPkg/VmgExitLib: Add support for VMMCALL " Lendacky, Thomas
2020-07-15 16:21 ` [edk2-devel] " Laszlo Ersek
2020-07-14 14:27 ` [PATCH v10 23/46] OvmfPkg/VmgExitLib: Add support for RDTSCP " Lendacky, Thomas
2020-07-15 16:21 ` [edk2-devel] " Laszlo Ersek
2020-07-14 14:27 ` [PATCH v10 24/46] OvmfPkg/VmgExitLib: Add support for MONITOR/MONITORX " Lendacky, Thomas
2020-07-15 16:21 ` [edk2-devel] " Laszlo Ersek
2020-07-14 14:37 ` [PATCH v10 25/46] OvmfPkg/VmgExitLib: Add support for MWAIT/MWAITX " Lendacky, Thomas
2020-07-15 16:22 ` [edk2-devel] " Laszlo Ersek
2020-07-14 14:37 ` [PATCH v10 26/46] OvmfPkg/VmgExitLib: Add support for DR7 Read/Write " Lendacky, Thomas
2020-07-15 16:25 ` [edk2-devel] " Laszlo Ersek
2020-07-14 14:37 ` [PATCH v10 27/46] OvmfPkg/MemEncryptSevLib: Add an SEV-ES guest indicator function Lendacky, Thomas
2020-07-14 14:37 ` [PATCH v10 28/46] OvmfPkg: Add support to perform SEV-ES initialization Lendacky, Thomas
2020-07-14 14:37 ` [PATCH v10 29/46] OvmfPkg: Create a GHCB page for use during Sec phase Lendacky, Thomas
2020-07-14 14:37 ` [PATCH v10 30/46] OvmfPkg/PlatformPei: Reserve GHCB-related areas if S3 is supported Lendacky, Thomas
2020-07-14 14:37 ` [PATCH v10 31/46] OvmfPkg: Create GHCB pages for use during Pei and Dxe phase Lendacky, Thomas
2020-07-14 14:37 ` [PATCH v10 32/46] OvmfPkg/PlatformPei: Move early GDT into ram when SEV-ES is enabled Lendacky, Thomas
2020-07-14 14:37 ` [PATCH v10 33/46] UefiCpuPkg: Create an SEV-ES workarea PCD Lendacky, Thomas
2020-07-14 14:37 ` [PATCH v10 34/46] OvmfPkg: Reserve a page in memory for the SEV-ES usage Lendacky, Thomas
2020-07-14 14:37 ` [PATCH v10 35/46] OvmfPkg/PlatformPei: Reserve SEV-ES work area if S3 is supported Lendacky, Thomas
2020-07-14 14:37 ` [PATCH v10 36/46] OvmfPkg/ResetVector: Add support for a 32-bit SEV check Lendacky, Thomas
2020-07-14 14:37 ` [PATCH v10 37/46] OvmfPkg/Sec: Add #VC exception handling for Sec phase Lendacky, Thomas
2020-07-14 14:37 ` [PATCH v10 38/46] OvmfPkg/Sec: Enable cache early to speed up booting Lendacky, Thomas
2020-07-14 14:37 ` [PATCH v10 39/46] OvmfPkg/QemuFlashFvbServicesRuntimeDxe: Bypass flash detection with SEV-ES Lendacky, Thomas
2020-07-14 19:50 ` [PATCH v10 40/46] UefiCpuPkg: Add a 16-bit protected mode code segment descriptor Lendacky, Thomas
2020-07-14 19:50 ` [PATCH v10 41/46] UefiCpuPkg/MpInitLib: Add CPU MP data flag to indicate if SEV-ES is enabled Lendacky, Thomas
2020-07-14 19:50 ` [PATCH v10 42/46] UefiCpuPkg: Allow AP booting under SEV-ES Lendacky, Thomas
2020-07-15 5:23 ` Dong, Eric
2020-07-14 19:50 ` [PATCH v10 43/46] OvmfPkg: Use the SEV-ES work area for the SEV-ES AP reset vector Lendacky, Thomas
2020-07-14 19:50 ` [PATCH v10 44/46] OvmfPkg: Move the GHCB allocations into reserved memory Lendacky, Thomas
2020-07-14 19:50 ` [PATCH v10 45/46] UefiCpuPkg/MpInitLib: Prepare SEV-ES guest APs for OS use Lendacky, Thomas
2020-07-15 5:55 ` Dong, Eric
2020-07-14 19:50 ` [PATCH v10 46/46] Maintainers.txt: Add reviewers for the OvmfPkg SEV-related files Lendacky, Thomas
2020-07-15 16:31 ` [edk2-devel] " Laszlo Ersek
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