From: "Lendacky, Thomas" <thomas.lendacky@amd.com>
To: devel@edk2.groups.io
Cc: Jordan Justen <jordan.l.justen@intel.com>,
Laszlo Ersek <lersek@redhat.com>,
Ard Biesheuvel <ard.biesheuvel@linaro.org>,
Michael D Kinney <michael.d.kinney@intel.com>,
Liming Gao <liming.gao@intel.com>,
Eric Dong <eric.dong@intel.com>, Ray Ni <ray.ni@intel.com>,
Brijesh Singh <brijesh.singh@amd.com>
Subject: [PATCH v6 06/42] MdePkg/BaseLib: Add support for the VMGEXIT instruction
Date: Tue, 24 Mar 2020 12:40:20 -0500 [thread overview]
Message-ID: <451c75448dc0aadd38028b1f7024593a72d20ee9.1585071656.git.thomas.lendacky@amd.com> (raw)
In-Reply-To: <cover.1585071656.git.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 d7a1dd017e95..62a09197b8a8 100644
--- a/MdePkg/Library/BaseLib/BaseLib.inf
+++ b/MdePkg/Library/BaseLib/BaseLib.inf
@@ -153,6 +153,7 @@ [Sources.Ia32]
Ia32/EnableCache.c | MSFT
Ia32/DisableCache.c | MSFT
Ia32/XGetBv.nasm | MSFT
+ Ia32/VmgExit.nasm | MSFT
Ia32/GccInline.c | GCC
@@ -288,6 +289,7 @@ [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 d0cbb52ed8f9..99fff8af5a3c 100644
--- a/MdePkg/Include/Library/BaseLib.h
+++ b/MdePkg/Include/Library/BaseLib.h
@@ -7906,6 +7906,20 @@ 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 591f0bb0e097..ee8c62c79c93 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 3eed1205adb2..277974eff9ee 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..cdf727825400
--- /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..6537a97b273c
--- /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
+
--
2.17.1
next prev parent reply other threads:[~2020-03-24 17:41 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-24 17:40 [PATCH v6 00/42] SEV-ES guest support Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 01/42] MdePkg: Create PCDs to be used in support of SEV-ES Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 02/42] MdePkg: Add the MSR definition for the GHCB register Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 03/42] MdePkg: Add a structure definition for the GHCB Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 04/42] MdeModulePkg/DxeIplPeim: Support GHCB pages when creating page tables Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 05/42] MdePkg/BaseLib: Add support for the XGETBV instruction Lendacky, Thomas
2020-03-24 17:40 ` Lendacky, Thomas [this message]
2020-03-24 17:40 ` [PATCH v6 07/42] UefiCpuPkg: Implement library support for VMGEXIT Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 08/42] OvmfPkg: Prepare OvmfPkg to use the VmgExitLib library Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 09/42] UefiPayloadPkg: Prepare UefiPayloadPkg " Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 10/42] UefiCpuPkg/CpuExceptionHandler: Add base support for the #VC exception Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 11/42] UefiCpuPkg/CpuExceptionHandler: Add support for IOIO_PROT NAE events Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 12/42] UefiCpuPkg/CpuExceptionHandler: Support string IO " Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 13/42] UefiCpuPkg/CpuExceptionHandler: Add support for CPUID " Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 14/42] UefiCpuPkg/CpuExceptionHandler: Add support for MSR_PROT " Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 15/42] UefiCpuPkg/CpuExceptionHandler: Add support for NPF NAE events (MMIO) Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 16/42] UefiCpuPkg/CpuExceptionHandler: Add support for WBINVD NAE events Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 17/42] UefiCpuPkg/CpuExceptionHandler: Add support for RDTSC " Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 18/42] UefiCpuPkg/CpuExceptionHandler: Add support for RDPMC " Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 19/42] UefiCpuPkg/CpuExceptionHandler: Add support for INVD " Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 20/42] UefiCpuPkg/CpuExceptionHandler: Add support for VMMCALL " Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 21/42] UefiCpuPkg/CpuExceptionHandler: Add support for RDTSCP " Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 22/42] UefiCpuPkg/CpuExceptionHandler: Add support for MONITOR/MONITORX " Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 23/42] UefiCpuPkg/CpuExceptionHandler: Add support for MWAIT/MWAITX " Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 24/42] UefiCpuPkg/CpuExceptionHandler: Add support for DR7 Read/Write " Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 25/42] OvmfPkg/MemEncryptSevLib: Add an SEV-ES guest indicator function Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 26/42] OvmfPkg: Add support to perform SEV-ES initialization Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 27/42] OvmfPkg: Create a GHCB page for use during Sec phase Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 28/42] OvmfPkg/PlatformPei: Reserve GHCB-related areas if S3 is supported Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 29/42] OvmfPkg: Create GHCB pages for use during Pei and Dxe phase Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 30/42] OvmfPkg/PlatformPei: Move early GDT into ram when SEV-ES is enabled Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 31/42] UefiCpuPkg: Create an SEV-ES workarea PCD Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 32/42] OvmfPkg: Reserve a page in memory for the SEV-ES usage Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 33/42] OvmfPkg/ResetVector: Add support for a 32-bit SEV check Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 34/42] OvmfPkg/Sec: Add #VC exception handling for Sec phase Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 36/42] OvmfPkg/QemuFlashFvbServicesRuntimeDxe: Bypass flash detection with SEV-ES is enabled Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 37/42] UefiCpuPkg: Add a 16-bit protected mode code segment descriptor Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 38/42] UefiCpuPkg/MpInitLib: Add CPU MP data flag to indicate if SEV-ES is enabled Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 39/42] UefiCpuPkg: Allow AP booting under SEV-ES Lendacky, Thomas
2020-03-24 17:40 ` [PATCH v6 40/42] OvmfPkg: Use the SEV-ES work area for the SEV-ES AP reset vector Lendacky, Thomas
2020-03-24 19:44 ` [PATCH v6 35/42] OvmfPkg/Sec: Enable cache early to speed up booting Lendacky, Thomas
2020-03-24 19:44 ` [PATCH v6 41/42] OvmfPkg: Move the GHCB allocations into reserved memory Lendacky, Thomas
2020-03-24 19:44 ` [PATCH v6 42/42] UefiCpuPkg/MpInitLib: Prepare SEV-ES guest APs for OS use Lendacky, Thomas
2020-03-30 16:53 ` [PATCH v6 00/42] SEV-ES guest support Lendacky, Thomas
2020-03-31 0:47 ` [edk2-devel] " Dong, Eric
2020-04-01 20:42 ` Lendacky, Thomas
2020-04-02 0:12 ` Dong, Eric
[not found] ` <1601D84A636A7BFC.25844@groups.io>
2020-04-14 15:30 ` Dong, Eric
2020-04-16 13:46 ` Lendacky, Thomas
2020-04-17 9:10 ` Dong, Eric
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